TWI237062B - Method for modulating converter reducing slag of converter smelted stainless steel - Google Patents

Abstract

The present invention relates to a method for modulating converter reducing slag of converter smelted stainless steel by adding an aluminum-containing material during the process of converter smelted stainless steel to modulate the ingredient of the converter reducing slag generated from the process of converter smelted stainless steel. The process of converter smelted stainless steel comprising: (a) providing a converter which has an iron-containing hot-metal; (b) adding a wasted steel combination into the converter which has a iron-containing hot-metal; (c) conducting converter blowing to the iron-containing hot-metal; (d) after blowing, the iron-containing hot-metal has become a stainless steel fluid having a converter reducing slag; and (e) tapping.

Description

1237062 V. Description of the invention (i) " ~ —- [Field of invention] The present invention relates to a converter reducing slag adjustment method for converter-refined stainless steel, and particularly relates to changing the characteristics of converter reducing slag for converter-refined stainless steel to increase The liquefaction ratio, a method for improving the slag stone formation phenomenon of the bricks under the upper cone of the converter (Upper and the tapping hole), reducing the amount of steel remaining in the g furnace, and making the production process smooth. [Background of the Invention]

Please refer to Figures 1A to 1C, which shows the tapping process when stainless steel is converted into a converter. When stainless steel is converted into a converter, the oxide slag containing oxides of chromium, nickel, or other alloys must be reduced to Recover the alloy components in the oxidized slag to make the converter reduction slag 12 in the converter 1000 shown in Figure 1A have a higher melting temperature and part of the solid content; please refer to Figure 丨 B, as The number of refining furnaces has increased. During the tapping process, the solid content of the converter reduction slag 丨 2 0 gradually deposits and accumulates under the upper cone 105 of the converter 1000 and under the tapping port 106, resulting in slag stone formation.丨 22, its negative impact is shown in Figure 1C: (1) After tapping, there is a large amount of residual steel 112 in the converter (about 1 kilometer "ton); (2) when tapping 1 2 0 of converter reduction slag flows with stainless steel molten steel 1 1 0 (not shown in the figure), resulting in an increase in the amount of slag pick-up before post-process refining; both of these will increase the operating time and increase the converter steelmaking time. the cost of. One of the features of the present invention is to provide a converter reducing slag adjustment method for converter-refined stainless steel. Therefore, the converter reduction of converter-refined stainless steel is changed > check characteristics to increase its liquefaction ratio and improve the converter upper cone (U ρ per Cone) and slag stone formation of the bricks under the tapping hole,

0109-8621TWF (N); dwwang.ptd Page 5 1237062 V. Description of the invention (2) Reduce the amount of converter residual steel and make production operations smooth. [Previous technique] ^ hi, refer to Figure 2, showing the general stainless steel refining process. In: Step 20 ", a converter is provided with an iron-containing melting and milling, and the type of the converter can be a top-blown converter, a top-bottom co-blow converter, or a composite type. Medium, is added in the iron-containing melt milling to add back, scrap steel. The steps of converter smelting 220 can be further subdivided into the steps of heating up 222, combining soil into: 224, and reducing slag by 226; in the converter smelting 22 ° =, the temperature of 1 iron melting and milling is ^ ⑽ ^ ~ 125 ( rc, while the temperature of converter melting 12〇 ^ '3 iron melting and milling is generally 1680t ~ 17〇 (pc, so in increasing temperature, coke is added in iron containing melting and milling, and oxygen is blown into the converter. The following reactions: 2C + 〇2 ~> 2C0 + heat of oxidation will increase the temperature of iron-containing fusion milling to 1680t ~ 1700x: and also add: lime, magnesia, dolomitic, and other materials as manufacturing materials Slag is used to make alloy feed 224. High-carbon ferrochrome and / or nickel iron and / or other alloy materials are added to provide alloy components such as chromium and nickel in stainless steel, so that iron-containing melt milling is transformed into stainless steel. The molten steel, while the converter continues to blow oxygen, the knife maintains the temperature of stainless steel = 1680. 00 ~ 1700; at this time and inert gas is blown into the converter to increase the stainless steel molten steel. Stir work, and in the following formula '3C + Cr203 — 3C0 + 2Cr, because the partial pressure of C0 is reduced, the reaction is promoted. Mobile suppressed chromium Next 226 upon oxidation reduction slag, or silicon iron aluminum shot was added to a further °

1237062 --------- V. Description of the invention (3) The following reaction occurred in the original agent: 2Cr203 + 3Si-> 4Cr + 3Si02 Cr203 + 2A1 ~> 2Cr + Al2〇3 to recover the oxide slag The alloy composition is converted into converter reducing slag. When the converter blowing and blowing stop 230, the gas blowing into the converter was stopped. At this time, the stainless steel molten steel and the converter reducing slag were in the converter. When the steel is tapped at 240, the converter is dumped] R0 ~ 110 ° to allow the stainless steel molten steel to flow out, and the converter reduction slag is left in the converter.

Traditionally, to solve the furnace stone phenomenon under the upper cone part and the tapping hole of the above-mentioned converter is (1) physical conversion of the converter blowing temperature from the original 1 6 8 (c 1 7 0 0 C to 1 7 1 〇 ° c ~ 730 ° C to liquefy the converter reducing slag; 2) chemically add low melting point fluorite (Cah) as a flux to reduce the melting point and viscosity of the converter reducing slag. = 'Increasing the blowing temperature of the converter will make it used in the converter. For example, the furnace lining refractory bricks and Diolin mouth Qirong m 丄, Tu Yi, person α a person low person 0 mouth parts are reduced due to accelerated dissolution loss_

Mouth ρ 'will make 哉 I in stainless steel liquid light and strong, and / prepare a few: Oxidation with other alloy components is strong for season 乂, and when the emulsified slag reduces 226, the reducing agent such as slag is aggravated. The increase in time for Taibei to join the driver ’s Shi Xitie or the increase in time, and to add low melting: soil burden and operation, security.

The section "Rong Shi will be refined with the above furnace lining refractory monument, and chemically reduce the above furnace lining refractory brick. You use 軎 = chemical reaction to dissolve it", which increases the operation and maintenance time, and also increases the production cost. The second feature of the present invention is that the reduction slag adjustment method of the converter is 'not increasing;' The second furnace does not record steel: vegetable, dish, and without sacrificing conversion

1237062 V. Description of the invention (4) In the service life of the consumables used in (4), the characteristics of the converter reduction slag of stainless steel made by the converter are changed to increase its liquefaction ratio. [Summary of the invention] The main purpose of the present invention is to provide a method for adjusting the reduction slag of converter-refined stainless steel. Therefore, the converter slag characteristics of converter-refined stainless steel are changed to increase its liquefaction ratio, thereby improving the upper cone of the converter. And the phenomenon of slag stone formation in the furnace bricks below the tap hole, reducing the amount of converter residual steel, thereby making the raw operation smooth. Another object of the present invention is to provide a conversion of stainless steel for converters: slag Γ ί square *, without increasing the operating temperature 'and without sacrificing the inside of the converter; use: the life of the consumables, Wenshan converter Cong Jinchang. Reduce the amount of converter residual steel, so that the production operation is in order to achieve the cost of the invention. W θ Reduction adjustment of converters for refining stainless steel; method for adding a type of converter steel to a converter process The converter produced in the process of refining stainless steel; the original process of refining stainless steel by the above converter includes: (1. a knife, and the above converter refining and milling; (b) adding the above-mentioned iron-containing fusion milling The second converter contains an iron-containing melt to convert the above iron-containing melt milling; ^ blasting agent and other materials; (c) the second iron-containing smelting and milling has become-including converter blowing and blowing stop 'at this time and (e) The stainless steel molten steel encountering the original slag 丨 [Detailed description of the invention]

The present invention relates to M w A and converter for making stainless steel, --- adding stainless steel molten steel 〇〇09-862_ (N); d_g

Description of the invention (5) = Aluminum material (its chemical composition is shown in tablework) 1 2 The original composition of the two components is preferably: Al2O3 content is 5 w Kg, so that the converter = volume ratio is i.442, Mg0 Content ❶: 5 wu, Ca〇 / ί The nature of converter reduction such as melting point makes the conversion ratio i5 Wt% increase with decreasing ratio. Refractory bricks lined with 2 liquid components of salty slag slag stones, please refer to Figure 3, and the stainless steel converter is smelted by the converter reduction method of the converter reduction method of the converter reduction slag that protects the converter steel. The converter that does not record steel is also surrounded; and the refining: stainless steel with a chromium content of 12 wt% or more, the formula /: 1 ^ is used for the above-mentioned non-reportable steel; where the above-mentioned content is Kg, Traditionally, fluorite is added to reduce the reduction slag in the converter. 1 = to remove about 4Kg of fluorite per ton of stainless steel molten steel: RMB / Kg. 8 or this is about 2 · 3 Table 1 this hair, the aluminum-containing material used, the chemical composition (wt%)

Ah〇3 A1 + A1N Si〇2 MgO CaO 60 ～ 70 15 ～ 20 4 ～ 5 2 ～ 4 0 ～ 2 Please refer to Figure 4, which shows the change of the initial melting temperature of converter reducing slag compared with the case without adding material with inscription. Relationship with A 12 03 content in converter slag. The A1203 content of 5 wt% to 15 wt% can effectively reduce the melting point of converter reducing slag, increase the proportion of liquid components in converter reducing slag, and reduce the occurrence of slag stone formation.

0109-8621TWF (N); dwwang.ptd Page 9! 237〇62

2. Description of the invention (6) The timing of adding waste ^ Tim 2 aluminum material 2 can be: (1) conversion tour before converter blowing ^ 5 1,5, adding S aluminum material; (2) after adding scrap steel in the converter, the material contains Materials; (3) Adding narrative [= case f batch addition during converter blowing process, depending on process needs. The process of refining stainless steel in the general converter is not the same as that in Benfaxin 1f, and the following methods are proposed: Two examples and three groups of traditional converters for refining stainless steel. The second method is to increase the operating temperature without sacrificing the converter's interior. Make the original collapse characteristics to increase its liquefaction and not record the f 2 furnace also: the square furnace brick slag stone phenomenon, reduce the converter; shangchangchang the effect; and other forms of transfer M ', so that the production operation can be applied to the converter. Such as the top-blown converter or composite system converter to make non-scale steel processes and methods. (2) Control group 2. Traditional converter refining does not increase the temperature of the converter by physical methods. (3) Control group 3: Traditional converter refining K1, ~ 1 flight. In the process and method of adding low-dazzle fluorite = steel by chemical means, the melting point and viscosity of the original slag, of which each ton of stainless steel =, to reduce the converter also. First embodiment: The Korean dry steel of the present invention :: Add Seoul. Adjusting method of reducing slag, adding converter to make steel without recording steel before blowing in converter. Containing aluminum materials to change converter to make stainless steel. 1 Add one together.

1237062 V. Description of the invention (7) Increase its liquefaction ratio; its φ > lUKg. Add stainless steel liquid with female collar about (5) First embodiment: Adjusting method of reducing slag, Yu Zhuan: The second furnace does not record steel converter to change the converter does not record ^ transfer ^ '加 人 一For materials with inscriptions, please refer to the 5A ~ 5CH steel and steel into the material with about 1 ”Kg. The second embodiment adjusts the converter and V, the second converter 500 has stainless copper steel 1 tapping process; please refer to Figure 5A, Above the molten steel 510; next, go to the converter reduction slag 52o floated on the stainless steel adjusted converter; check 52 ° on February 5, 5B. During the tapping process, no slag stone deposition; △ Increase in cases, almost a small amount of residual steel 512 (about " ton) in the converter 500 is more painful ♦ Figure 5C 'After steelmaking, there are only the above five groups of laboratories d :; furnace_in. 1 π < Refine the results, as shown in Listing 2:

1237062 V. Description of the invention (8)

Table 2 Experimental results Control group 1 Control group 2 Control group 3 First example Second example Converter refining degree (ec) 1680 ~ 1700 1710-1730 1680 ^ 1700 1680-1700 1680 ^ 1700 Increased coke cost (yuan / Furnace) (compared to the control group 1) 1500-25D0 0 0 0 Cost of fluorite investment (yuan / furnace) 700-1200 Cost of investment including drilling materials (yuan / furnace) 1650 2500 煃 lining refractory brick # Life (furnace) 3000 2500 2600 3000 2900 Average cost of refractory bricks (yuan / furnace) 6700 8000 7700 6700 6900 Increased cost of aerobium (yuan / furnace) (relative to bismuth bismuth 1) 2800-3800 1700 -2200 1650 2700 Slag stone removal period (furnace times) 5 8 8 15 18 Average operation time (short / furnace) (including downtime due to replacement of furnace lining refractory bricks and removal of slag stones) 110 115 112 100 105 Residual Barium Dong (mouth / furnace) 1 0.3 0.4 0.1 0.1 Of which about 120 tons of stainless steel molten steel per furnace; each time the furnace lining refractory brick of the converter is replaced, the cost of consumables is about 20 million yuan. Compared with the control group 2 and 3, the amount of residual steel per heat can be reduced from 1cm sigma

0109-8621TWF (N); dwwang.ptd Page 121232705 V. Description of the invention (9) to 0 · 3 ~ 0 · 4 metric tons 'The slag stone removal cycle is extended from 5 to 8 times', but the first of the present invention According to the first and second embodiments, the residual steel amount per heat can be reduced to about 0.1 metric tons, and the slag stone removal period is further extended to 5 to 8 heats, which achieves the improvement of the upper cone of the converter of the present invention. The main purpose is to reduce the amount of residual steel in the converter, and to reduce the amount of residual steel in the converter. In addition, as described above, the control group 2 physically increased the converter blowing temperature from 1 680 ° C to 1 700 ° C to 171 °. 〇173〇c to liquefy the transition reduction slag, because the furnace lining refractory bricks and bottom-blown products due to accelerated dissolution loss and reduce their service life, so that the life of the furnace lining refractory bricks from the 3,000 furnaces of the control group 1. The control group 3 added low-melting fluorite as a flux by chemical means to reduce the melting point and viscosity of the reducing slag of the converter, and also reduced the life of the furnace lining refractory monument to 2600 times. However, in the first and first examples of the present invention, the life of the furnace lining refractory bricks is 2900 to 300,000 times. There is no obvious negative impact, which is a modification of the invention-Upper Cone and Upper Cone. The furnace brick & stone formation phenomenon under the tapping hole, reduces the amount of steel in the converter, and further achieves the purpose. , Tangent is one < 1 method, =. : 115 Da: Guang Er ^ is a traditional converter for refining stainless steel. Only about 120 tons of stainless steel can be produced in the knife, and the converter's reduction method for refining copper can be implemented. For example, in the first and second embodiments described above, because the above-mentioned present invention is achieved: Example u: To reduce the average operating time per furnace to 1005; the objective is to increase the operating efficiency of the converter, Increasing output per unit time

0109-8621TWF (N); dwwang.ptd Page 13 1237062 V. Description of the invention (10) Plus benefits. In addition, in terms of process improvement costs, the control group 2 physically increased the furnace blowing temperature from 1 680 ° c to 1 70 0 ° c to 1710 t to 1730 ° C to liquefy the converter reduction slag. The reduction in the life of the refractory bricks of the furnace lining has increased the average refractory brick cost of the mother furnace from about 6,700 yuan to about 8 qqq yuan. In the round furnace blowing process, more coke must be invested to raise the temperature, making the cost of each coke investment Increased 1550 ~ 2500 yuan. In terms of consumables, μ must pay an additional improvement cost of 2800 ~ 3800 yuan per heat; while the control group added 3 low-melting fluorite as a flux to reduce the cost. The melting point and viscosity of the converter reducing slag also reduces the life of the refractory bricks of the furnace lining, so that the cost of refractory bricks is increased from about 6700 yuan to about 77000 yuan, and the cost of the second and second furnaces is 700 ~ 1200 yuan per furnace. In terms of consumables, good and easy to use, it is necessary to change the price of Pu Shan Yi Yongci from 1700 to 2200 yuan to cover the cost of the goods. • The master furnace, tμ @ cost. , The implementation of converter 遝 origin adjustment method, such as in the above According to the example, with the cost of the materials with the inscriptions in the example, the cost is 1650 per furnace. The first shellfish costs 1,650 ~ 2700 yuan per furnace, and it is rebuilt into the Taiyuan. In terms of righteousness, two more traditional improvements are required. For example, "quote who describes the adjustment method of the reduction slag in the control group 2 and 3 = Mao Mingzhi's converter 2 for stainless steel refining, which is quite equivalent to the control group 3: the cost of improvement is lower than that of the control group Furnace reduction and adjustment method; "Real :: = :; The transformation of the furnace to make money without steel" is far better than the control group 2, 3, 2 and the improvement results brought by the above, which is the improvement of Shige and Yuan The method is more cost-effective in terms of improving the results and paying for additional benefits.

1237062 V. Description of the invention (11) Although the present invention has been disclosed in the preferred embodiment as above, it is not intended to limit the present invention. Anyone skilled in the art can make some changes without departing from the spirit and scope of the present invention. Changes and retouching, therefore, the protection scope of the present invention shall be determined by the scope of the appended patent application.

0109-8621TWF (N); dwwang.ptd Page 15 1237062 Brief description of the drawings In order to make the above and other objects, features, and advantages of the present invention more comprehensible, the following exemplifies preferred embodiments and cooperates with all The drawings are described in detail as follows: [Brief description of the drawings] Figures 1A to 1C are a series of cross-sectional views, which are used to explain the tapping process when the stainless steel is conventionally made by a converter. Fig. 2 is a flow chart for explaining the general stainless steel refining process. Fig. 3 is a CaO-Si〇2-Al2O3- 15wt% Mg0 multiphase diagram, which is used to illustrate the composition range of the converter reduction slag of the present invention. Fig. 4 is a linear coordinate diagram for illustrating the relationship between the change in the initial melting temperature of the converter reducing slag and the content of A 12 03 in the converter reducing slag compared with the case where no aluminum-containing material is added. Figures 5A to 5C are a series of cross-sectional views for explaining the stainless steel tapping process after the implementation of a preferred embodiment of the present invention. [Symbol description] 100 ~ converter; 10 ~ 1 ~ bottom mouth; 10 ~ 2 ~ bottom; 10 ~ 3 ~ lower cone part; 104 ~~ hearth; 10 ~ 5 ~ upper cone part; 1 ~ 06 ~ Tapping port; 107 ~ furnace port;

0109-8621TWF (N); dwwang.ptd Page 16 1237062 Brief description of the drawing 11 0 ~ Stainless steel steel; 11 2 ~ Residual steel; 1 2 0 ~ Converter reduction slag; 1 2 2 ~ Slag calculus; 2 0 0 ~ Start steps; 2 1 0 ~ Scrap steel input; 2 2 0 ~ converter blowing; 2 2 2 ~ temperature rise; 224 ~ alloy feed; 2 2 6 ~ oxide slag reduction; 2 3 0 ~ converter blowing stop; 240 ~ Tapping; 30 0 ~ CaO-Si02-Al2 03 -15wt% Mg0 multivariate phase diagram; 3 5 0 ~ composition range of converter reducing slag of the present invention; 50 0 ~ converter; 5 0 1 ~ bottom mouth; 5 0 2 ~ Furnace bottom; 5 0 3 ~ lower cone; 5 0 4 ~ furnace belly; 5 5 5 ~ upper cone; 506 ~ steel outlet; 507 ~ furnace mouth; 5 1 0 ~ stainless steel liquid; 5 1 2 ~ residual steel;

0109-8621TWF (N); dwwang.ptd Page 17 1237062 Brief description of the drawing 520 ~ converter reduction slag 5 2 2 ~ slag calculus.

IBI 0109-8621TWF (N); dwwang.ptd Page 18

Claims (1)

1237062 ------ VI. Scope of patent application 6. The method for adjusting furnace reduction as described in item 3 of the scope of patent application, wherein the combined content of the transitional aluminum of stainless steel containing eight materials and stainless steel is: 15 wt% ~ 20 wt%. Aluminum and gold in the knife 7. According to the converter reduction slag adjustment method described in item 3 of the scope of the patent application, the conversion of A in the aluminum-containing crude β furnace smelting stainless steel is 4 Wt% ~ 5 wt%. Langzhong ° 31, in the composition of Lu Caike, the content of the dioxide is 8. The conversion of the stainless steel made by the converter as described in item 3 of the scope of the patent application: reduction slag adjustment method, wherein the oxidation of the aluminum-containing material composition is 2wt% ~ 4wt%. Li9. The method for adjusting the reduction slag of converter-refined stainless steel as described in item 3 of the patent scope, wherein the composition of the aluminum-containing material further includes gold oxide 5 〇I 〇 · as described in item 9 of the scope of patent application The method for adjusting the reduction slag in a converter smelting furnace, wherein the conversion of steel in the aluminum-containing material composition is less than or equal to 2 wt%. Emulsified word content II · The method for adjusting slag produced by converter refining as described in item 2 of the scope of the patent application, wherein the converter reduction in step (d) above < the components of the mattress include at least: alumina, Calcium oxide, silicon dioxide, town. 1 2 · The converter reducing slag adjustment method for converter-refined stainless steel according to item 丨 丨 in the scope of the patent application, wherein the content of oxidation in the converter reducing slag component is 5wt% to 15wt%. 8 1 3 · Converter refining without recording steel as described in Item 1 丨 of the scope of patent application Converter reduction > check adjustment method, wherein the converter reduction> 0109-8621TWF (N); dwwang.ptd Page 20 1237062 6. Scope of patent application The content ratio with silicon dioxide is 1.5 ~ 2.2. 1 4 · The method for adjusting converter-reduced non-converter reducing slag as described in item 11 of the scope of patent application, wherein the content of the converter reducing slag component is 6 wt% ~ 1 5 ^ chemical conversion t% 1 5 The method for adjusting the reduction slag of a converter for refining without money in the converter described in item 1 of the scope of the patent application, wherein the composition of the stainless steel molten steel is a stainless steel with a daily weight of more than 5%. Li 12 1 6. The method for adjusting the reduction slag of a converter without refinery as described in item 1 of the scope of the patent application, wherein the composition of the stainless steel molten steel is nickel-containing stainless steel with a weight percent or more. Content 18 17 · The adjustment method of converter reduction slag as described in item 1 of the scope of the patent application, wherein the converter is selected from the · top-blown Yigang converter and bottom-blown converter or composite plastic converter. Converter, top 18 · —The converter reducing slag for converting stainless steel into a converter contains a converter for stainless steel manufacturing process. (A) Provided "^ Guangxi Iron Rongrui; (b) Combining a scrap steel with a Ming material, The method includes the iron-containing melting and milling; (c) the iron-containing melting and milling is added into the converter, and the iron-containing melting and milling has become a process including sighing and milling. (D) Turning stainless steel molten steel; and (e) Taping materials containing inscriptions to adjust the above step (d), in the above step (b), the converter converter also reduces the original slag while adding slag. »1 9 · The converter reducing slag adjustment method as described in item 8 of the scope of the patent application, wherein the aluminum-containing material converter stainless steel is 60 wt% to 70 wt% alumina and 15 wt% to% Wt% aluminum nitride and metal 0109-8621TWF (N); dwwang.ptd Page 21 1237062 6. Scope of patent application Aluminum combination, 4 wt% ~ 5 silicon dioxide, and 2 wt% ~ 4 wt% oxidation town. 2 〇 According to the method for adjusting converter reducing slag of converter-refined stainless steel as described in item 19 of the scope of the patent application, the component of the aluminum-containing material in # further contains 2 wt% or less of calcium oxide. , 2 1 · The converter for refining stainless steel in the converter as described in item 18 of the scope of patent application, the original / examination adjustment method, the total amount of the inscribed material added in # is that no steel liquid is recorded per αton Add 12 KG ~ 20 KG of this aluminum-containing material. 2 2 As described in φ ▲ Taigudi, h. Patent No. 18 of the scope of h patent for making stainless steel melons = 乂 'check and adjust the method, wherein the converter reduction in step (d) above "一 之,' contains at least : 5 wt% ~ 15 wt% alumina, the content ratio is 1 · •, oxidation is about 2% with silicon dioxide, and 6 wt% ~ 15 wt% magnesium oxide. • As described in item 8 of the scope of patent application Conversion of converter for refining stainless steel: L, the original method of checking and adjusting, wherein the composition of the stainless steel molten steel is stainless steel with chromium content of 12 wt% or more. 2j · Converter refining as described in item 18 of the scope of patent application Stainless steel conversion and reduction method, wherein the composition of the molten steel in the ballast steel is nickel-containing stainless steel with a chromium content of 18 or more. // The converter for refining stainless steel as described in item 18 of the scope of patent application The reduction slag adjustment method, the furnace system is selected from the top blow, top and bottom co-blowing converter, Zhi, _, and previous set-up converters. 26. A variety of converter slag adjustment methods for stainless steel, including: converter Process for refining stainless surface: (a) Provide a converter with iron containing Xuan Rui ' b) applying a composition of scrap added to the molten iron within the converter milling 0109-8621TWF (N); dwwang.ptd Page 22 237〇62 Scope of patent application-At this time, it) people perform converter blowing on the iron-containing melting and milling; (d) converter blowing and blowing stop, liquid; iron melting and milling have become a stainless steel containing a converter reducing slag, and ( e) tapping; after the above step (b), Jie Er of the above step (c) plus an inscription material to adjust the converter's reduced denier ingredients in the above step (d). 2 rj M inspection ... · The original -7 of converter-refined stainless steel as described in item 26 of the scope of patent application > Check adjustment method 'wherein the aluminum-containing material contains at least: wt% -70 I Emulsified aluminum, 15 wt% ~ 20 wt% aluminum nitride and metal chillers, and a combination, 4 wt% ~ 5 wt% silicon dioxide, and 2 wt% ~ 4 wt% oxide town. • The furnace reduction / checking method for converter-refined stainless steel as described in item 27 of Shen Qing's patent scope, wherein the composition of the material containing the inscription further includes an oxidation part below wt%. 2j · The method for adjusting the reduction output of a converter without steel recording as described in item 26 of the scope of the patent application, wherein the added amount of the aluminum-containing material is · mother 'stainless steel molten steel added 1 2 KG ~ 20 KG's inscription material. 30. The converter reduction method for converter-refined steel-free converters described in item 26 of the scope of the patent application, and the adjustment method, wherein the component of the converter reduction slag in step (d) above contains at least 5 wt% ~ 15 wt ° /. Aluminum oxide, calcium oxide and silicon dioxide with a content ratio of i 5 to 2.2, and 6 wt% to 15 wt% magnesium oxide. 31. The converter reducing slag adjustment method for converter-less steel making as described in item 26 of the scope of patent application, wherein the composition of the stainless steel molten steel is stainless steel with a complex content of 12 wt% or more. 32 · Conversion of non-recorded steel by converter as described in item 26 of the scope of patent application 〇1〇9-862n ^ (N); dwwan ^ Ptd 1237062 6. Scope of patent application The converter reducing slag adjustment method, wherein the composition of the stainless steel liquid is chromium content 18 wt ° /. Above nickel-containing stainless steel. 33. The method for adjusting the reduction reduction of a converter for making stainless steel in a converter according to item 26 of the applied patent, wherein the converter is selected from the group consisting of a top-blown converter, a top-bottom co-blow converter, or a composite converter. 34 · —A converter reducing slag adjustment method for converter-refined stainless steel, including: converter-refined stainless steel process: (a) a converter is provided, which contains iron and molten iron, (b) a scrap steel combination is added to the converter In the iron-containing melting and milling; (> c) converter melting of the iron-containing melt milling; ((0) converter blowing and blowing stop, at this time the iron-containing melting and milling has become a stainless steel containing a converter reducing slag And (e) tapping; in the middle of the above step (c), add a material containing Shao to adjust the composition of the converter reducing slag in the above step (d). The method for adjusting the converter of stainless steel for converting stainless steel according to the above item, wherein the composition of the aluminum-containing material includes at least: 60 Wt% to 70 wt% alumina, 15 wt% to 20 wt ° / D aluminum nitride In combination with metallic aluminum, 4 wt% ~ 5 wt% silicon dioxide, and 2 wt% ~ 4 wt ° / t magnesium oxide. 3j · Smelting stainless steel in a converter as described in item 35 of the scope of patent application Converter reducing slag adjustment method, wherein the composition of the aluminum-containing material further includes 2 wt% or less of oxide. 3J · If you apply for special The method for adjusting the original slag of converter-refined stainless steel in the scope of item 34, wherein the total amount of the aluminum-containing material added is: 12 KG ~ 20 KG of the aluminum-containing material is added to each mouth of the stainless steel molten steel '38 · Smelting stainless steel by converter as described in item 34 of the scope of patent application 0109-8621TWF (N); dwwang.Ptd Page 24 1237662 6. Method for adjusting converter reducing slag in the scope of patent application, wherein the component of the converter reducing slag in the above step (d) contains at least: 5 wt% to 15 wt% of Alumina, oxide ratio of 1.5 ~ 2 · 2 and stone dioxide, and oxide town of 6 wt% ~ 15 wt%. 39. The converter reduction slag adjustment method for converter-refined stainless steel as described in item 34 of the scope of the patent application, wherein the composition of the stainless steel molten steel is non-recorded steel with a chromium content of 12 wt% or more. 40. The converter operation method of converter-smelted stainless steel as described in item 34 of the scope of patent application > Check adjustment method ' wherein the composition of the stainless steel molten steel is nickel-containing stainless steel with a content of 18 wt% or more. 41. The method for adjusting converter reducing slag for converter-refined stainless steel as described in item 34 of the scope of patent application, wherein the converter is selected from: top-blown converter, top-bottom co-blow converter, or composite converter. 4 2. —A converter reducing slag adjustment method for converter-refined stainless steel, including a converter-refined stainless steel process. (A) A converter is provided with an iron-containing melt mill; (b) a scrap steel combination is added to the converter The iron-containing melting and milling in the iron; (c) converter blowing of the iron-containing melting and milling; (d) converter blowing and blowing stop, at this time the iron-containing melting and milling has become a stainless steel containing a converter reducing slag And (e) tapping steel; after step (d), an aluminum-containing material is added to adjust the composition of the converter reduction slag in step (d). 43. The method for adjusting converter reducing slag of converter-refined stainless steel according to item 42 of the scope of the patent application, wherein the composition of the aluminum-containing material includes at least: 60 wt% to 70 wt% of an oxide name, 15 wt% to 20 wt The combination of% nitride and metal shaw, 4 wt% ~ 5 wt% of dioxide, and 2 wt% ~ 4 wt% of magnesium oxide. 0109-8621TWF (N); dwwang.ptd Page 25 1237062 Liushen% Patent Fanyuan converter is also used to adjust the method for refining stainless steel by wt.% As described in Item 43 of Shenyang Patent Scope. The composition of the material further includes a 2 r lice reduction. Han furnace i · / ^, converter stainless steel smelting as described in the scope of application for patent No. 42 is the adjustment method of Ling, in which the total amount of the aluminum-containing material is added. 1 2 KG ~ 20 KG of this aluminum-containing material. 4 0 j * _ Made of stainless steel by converters described in item 4 of the scope of patent application, 杳, 杳: every adjustment method, wherein the above steps (D) The converter reduces 5 ^ 2.2 points / ^ contains: 5 to 15% by weight of the oxide, the content ratio is 1. emulsified calcium and silicon dioxide, and 6 wt% to 15 wt% of Oxidation town. Tricky! J. Yuru * Stainless steel for converter refining as described in item 42 of the scope of patent application: 1 £ Adjustment method 'wherein the composition of the stainless steel liquid is stainless steel containing more than 1Z Wt / ο. The steelmaking process of the converter described in item 42 of the patent application scope of S-refining is not _steel > the method of adjusting ϊ, wherein the composition of the non-steel molten steel is a nickel-containing stainless steel with a weight of Λ '18 wt / ° or more. Q49 content 49 The adjustment method of converter reducing slag according to item 42 of the scope of application for patent, wherein the converter smelting: top-bottom co-blow converter without steel is The type of converter is selected from the top-blown type, and the following methods are used to reduce the damage and adjust the recovery method of the converter. The converter is used to return the original slag, and the converter is used to reduce the slag. % ~ 15 wt ° / G alumina, content ratio is from knife to v 0 3 · 5 silicon oxide, and 6 wt% ~ 15 wt% magnesium oxide. · 2 calcium oxide and dioxygen