CN1320127C - Trielement composite material inner liner blast furnace material distribution chute and its preparation technology - Google Patents
Trielement composite material inner liner blast furnace material distribution chute and its preparation technology Download PDFInfo
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- CN1320127C CN1320127C CNB2005100416766A CN200510041676A CN1320127C CN 1320127 C CN1320127 C CN 1320127C CN B2005100416766 A CNB2005100416766 A CN B2005100416766A CN 200510041676 A CN200510041676 A CN 200510041676A CN 1320127 C CN1320127 C CN 1320127C
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Abstract
本发明公开了一种用于无料钟的三元复合材料内衬高炉布料溜槽的制备工艺，特别适用于大、中型高炉的生产作业。冲击区(2)内衬层(3)是楔形环状结构，滑动区(4)内衬层(5)是等厚环状结构。耐磨内衬层(3、5)由陶瓷棒(8)、纳米结构金属丝网(9)、复合料(10)复合而成。本发明汇集了陶瓷材料高硬度、金属材料高韧性高强度等各种优点，解决了大块陶瓷在冲击下的碎裂、单一金属材料抗腐蚀性和抗磨性相对较差的难题。本发明耐磨层实现一体化设计制作，楔形环状结构分散了矿石的冲击力，有效地减小冲击磨损量。本发明使用寿命比现有各种材质、结构的溜槽提高3倍以上，减少了高炉停产检修的次数，保证高炉长期连续生产。
The invention discloses a preparation process for a ternary composite material-lined blast furnace distribution chute without a material bell, and is particularly suitable for the production operation of large and medium-sized blast furnaces. The inner liner (3) in the impact area (2) is a wedge-shaped annular structure, and the inner liner (5) in the sliding area (4) is an equal-thickness annular structure. The wear-resistant lining layers (3, 5) are compounded by ceramic rods (8), nano-structured wire mesh (9), and composite materials (10). The invention combines various advantages such as high hardness of ceramic materials and high toughness and high strength of metal materials, and solves the problems of fragmentation of bulk ceramics under impact and relatively poor corrosion resistance and wear resistance of a single metal material. The wear-resistant layer of the invention realizes integrated design and manufacture, and the wedge-shaped ring structure disperses the impact force of ore, effectively reducing the amount of impact wear. The service life of the invention is more than 3 times higher than that of existing chutes of various materials and structures, reduces the number of shutdowns and repairs of the blast furnace, and ensures the long-term continuous production of the blast furnace.
Description
Technical field
The present invention relates to the preparation technology of the device of bell-less blast furnace distributor chute, particularly a kind of preparation technology of compound blast furnace material distribution chute.
Background technology
In Iron industry, blast furnace material distribution chute commonly used adds material in blast furnace, and this kind distribution chute is arranged in the centre of blast furnace furnace roof and can turns round around the vertical axis of blast furnace, and can fascinate around a horizontal axis, makes furnace charge even.Add material and fall on the distribution chute through center feed trunnion from a hopper by the weight that measures, modern large blast furnace, will be distributed into the furnace charge that tons up to ten thousand are made up of ore, coke, agglomerate etc. in the stove by distributor chute every day, these furnace charge hardness height, corner angle are sharp-pointed, flow velocity is big, surging force is strong, throat temperature height in addition, at first clash into distributor chute with sizable impact energy in the impact zone of chute, high speed tumbles from the sliding area of chute then.This shows that distributor chute is subjected to very serious impact wearing and tearing and abrasive wear, cause chute serious wear, work-ing life to be lacked, perforation, fracture accident happen occasionally, and have a strong impact on cloth system, and even the normal operation of whole blast furnace.
For prolonging the work-ing life of chute, a large amount of trials have been done from improving aspects such as material, structure and manufacturing process by each producer both at home and abroad, develop the distributor chute of various ways.In the prior art of non material bell cloth chute, mainly contain monolithic devices and embedding lining type structure, built-in liner plate type is arranged again in the embedding lining type structure and isolated hard alloy blocks type is installed.Chinese patent CN-94115753.9, denomination of invention is that " distribution chute that is used for bulk material " discloses a kind of one-piece construction distributor chute that the backgauge chamber is set, this invention is used the bulk cargo that is blocked in the magazine to withstand shocks and is worn and torn, to improve the work-ing life of chute, but the dividing plate in backgauge chamber is subjected to gouging abrasion and abrasive wear inevitably, and block board thickness is thinner, very fast height descends under wear working condition, particularly in the district that is hit, dividing plate lost efficacy more rapid, can not constitute the backgauge chamber effectively and store bulk cargo, the furnace charge that eminence is fallen directly impacts the bottom surface and the chute perforation is scrapped.Chinese patent CN-91222239.5, denomination of invention is " a bell-less blast furnace distributor chute liner plate ", disclose a kind of by the liner plate matrix be embedded in the abrasion-proof backing block that the block Wimet on the liner plate matrix is formed, on the matrix of its liner plate, process groove at regular intervals, in groove, inlay block Wimet, the wear resistance of liner plate is improved.But because this inlay need be carried out the accurate machining of a large amount of grooves, complex process, difficulty is bigger, because Wimet belongs to hard crisp material, when some block Wimet is subjected to greater impact and is cracked, adjacent block Wimet will lose and support one another and cause other Wimet flaking in the chute, shortened the work-ing life of liner plate, secondly, because Wimet is different with liner plate matrix rub proofness, after the liner plate matrix is worn and torn by selectivity in the use, can occur also that block Wimet peels off and work-ing life of influencing liner plate, moreover, the segmentation liner plate is because distortion, the liner plate displacement often appears in reasons such as briquetting is loosening, causes material directly to impact or may wear to shell causing perforation to be scrapped.Chinese patent ZL96225684.6, ZL94238974.3 and ZL96238231.0 disclose three kinds of different positionss respectively and have arranged the alloy bump of array mode by welding or the Bolt Connection distributor chute to the housing base; improve the work-ing life of chute by the antiwear characteristic of alloy block; but complex process and poor stability; the matrix of alloy block gap location directly is subjected to the material abrasive action; alloy block connects through regular meeting with matrix and becomes flexible, comes off, and causes the chute bulk life time poor.
In sum, there are problems in present used distributor chute at aspects such as material, structure and manufacturing process, has many defectives and deficiency aspect shock-resistance, wear resistance and work-ing life.
Summary of the invention
The invention provides a kind of shock-resistant, wear-resistant, long service life, reasonable in design, the preparation technology of the blast furnace material distribution chute that the wear-resistant liner layer is composited by ceramic rod, metal wire screen in nanometer structure, compound material ternary material.
Preparation technology of the present invention is achieved through the following technical solutions: its preparation technology carries out according to following step:
A. make steel bushing skin (1) by carbon steel or steel alloy;
B. by braiding net machine braiding metal wire screen in nanometer structure (9); Carry out cleanup acid treatment;
The material of this metal wire screen in nanometer structure (9) adopts nanostructure soft steel, medium carbon steel, high carbon steel wire; The metastable material metal silk of the perhaps basic, normal, high carbon alloy steel wire of nanostructure, or nanostructure manganese steel is made;
C. according to the geomery and ceramic rod (8) the axis arragement direction of wearing layer (3,5), shear, superimposed metal wire screen in nanometer structure (9); This ceramic rod (8) uses alumina rod or carbonization tungsten bar;
D. ceramic rod (8) is embedded in the mesh of metal wire screen in nanometer structure (9);
E. prepare compound material (10), this compound material (10) mainly is made up of cement, aluminum oxide powder, is compound with water; Cement aluminium Barbiturates cement, weight fraction is 20～40%; The granularity of aluminum oxide powder is 5～100um, and weight fraction is 40～70%; The weight fraction of water is 10～20%;
The compound material (10) that f. will prepare is pressed into or inserts curing molding in the remaining slit of metal wire screen in nanometer structure (9) by the vibrations of three-dimensional bumper, promptly makes wear-resistant liner layer (3,5);
G. the wear-resistant liner layer of making (3,5) is placed in steel bushing skin (1) cavity, fastening briquetting (11) and circular fin (7) are fixed on steel bushing skin (1) the internal surface corresponding position by bolt or welding process, and briquetting (6,14) are fixed on the upper limb of steel bushing skin (1).
In technique scheme, compound material (10) can also be made up of inorganics powder and heat stable resin, and its weight ratio is 1.5～3: 1; The inorganics powder is aluminum oxide powder, carborundum powder, nitrogenize titanium valve, carbonized titanium powder or tungsten carbide powder, and granularity is 5～100um, and heat stable resin is Resins, epoxy or resol.
In technique scheme, the wedge shape ring-type inclined-plane of air retaining wall (3) upper surface and chute axis angle are 10 °～60 °, and its length is 15%～50% of chute total length.The thickness of air retaining wall (5) is 5～100mm.
Ceramic rod (8) axis direction in the wear-resistant liner layer (3,5) is approaching parallel with the material falling direction.Ceramic rod (8) diameter is 1～20mm, and ceramic rod (8) axis and chute axis angle are 30 °～90 °.Wear-resistant liner layer (3,5) interior metal wire screen in nanometer structure (9) are closely stacked, and this metal wire screen in nanometer structure (9) mesh size is 1～20mm, and wire diameter is 0.1～3mm.
The blast furnace material distribution chute that uses preparation technology of the present invention to make, it mainly is made up of steel bushing skin (1), wear-resistant liner layer (3,5), is divided into impact zone (2) and sliding area (4) by the flow strength of material.Impact zone (2) air retaining wall (3) upper surface is the wedge shape ring texture, and sliding area (4) air retaining wall (5) is the uniform thickness ring texture.Wear-resistant liner layer (3,5) is composited by ceramic rod (8), metal wire screen in nanometer structure (9), compound material (10).Ceramic embedded rod (8) in the mesh of metal wire screen in nanometer structure (9), compound material (10) is inserted curing molding in metal wire screen in nanometer structure (9) the residue slit, and compounded wear-resistant liner layer (3,5) fixes by briquetting welding or bolt with steel bushing skin (1).Its concrete fixed form: steel bushing skin (1) front end is provided with circular fin (7), is welded with fastening briquetting (11) in steel bushing skin (1) rear end, is fixed with briquetting (6,14) at steel bushing skin (1) upper limb.
The invention has the advantages that:
1, wear-resistant liner layer of the present invention is to be made by high temperature resistant, shock-resistant and anti abrasive trielement composite material, this matrix material has made full use of ceramic high rigidity, wear-resistant characteristic, overcome bulk pottery cracked difficult problem under impacting again, ceramic rod plays a part directly to bear material load, because its high rigidity, stop the wearing and tearing that cause with paddling that are pressed into of material wedge angle, significantly reduced the loss of wearing layer material.Metal wire screen in nanometer structure plays a part to involve ceramic rod jointly and transmits stress waves in soils with the compound material that is compounded in the gap of silk screen and ceramic rod, make the stress moment that acts on the ceramic rod be delivered to the peripheral region, the destruction of having avoided stress raisers to cause to material, and the existing high strength of metal wire screen in nanometer structure, high tenacity is arranged again, itself is a kind of good wear-resistant material.Therefore the shock-resistant and wearability of this material exceeds more than 3 times than other materials.
2, the material impact zone cambridge ring structure that is subjected to of the present invention, be dispersed into the surging force of material perpendicular to the wedge shape inclined-plane and be parallel to wedge shape inclined-plane both direction, reduced vertical impact power to wearing layer, reduce the direct impact energy of material effectively to chute, thereby reduced the gouging abrasion amount of impact zone wearing layer, and can prevent simultaneously that material from splashing outside chute, improve cloth evenness.
3, the cambridge ring structure of impact zone of the present invention can realize the equal life military service at each position of distributor chute, has prolonged the turnaround of equipment greatly, and the assurance iron-smelting blast furnace is worked continuously for a long time.
4, the present invention realizes the integral manufacturing, make it and the outer field connection of steel bushing tight, avoided other segmentation lining plate structure because the unusual defectives such as directly impact, wearing and tearing chute overcoat that reach of the Flow of Goods and Materials that wherein one or a few liner plate becomes flexible, displacement causes guarantee job stability.
Description of drawings
Below in conjunction with accompanying drawing the present invention is described in further detail:
Fig. 1 is the longitudinal sectional view of embodiment 1;
Fig. 2 is Figure 1A-A cross section view;
Fig. 3 is Figure 1B-B cross section view;
Fig. 4 is Fig. 1 I partial enlarged drawing;
Fig. 5 is the longitudinal sectional view of embodiment 2;
Fig. 6 is Fig. 5 A-A cross section view;
Fig. 7 is the longitudinal sectional view of embodiment 3;
Fig. 8 is Fig. 7 B-B cross section view;
Fig. 9 is Fig. 7 I partial enlarged drawing;
Figure 10 is the process flow sheet of embodiment 1,2,3.
Embodiment is as described below, but the invention is not restricted to following examples.
A kind of trielement composite material inner liner blast furnace material distribution chute is referring to Fig. 1, Fig. 2, Fig. 3 and Fig. 4.It mainly is made up of steel bushing skin 1, wedge shape ring-type wear-resistant liner layer 3, uniform thickness ring texture wear-resistant liner layer 5, fastening briquetting 11, fastening briquetting 6, circular fin 7, fixed arm 12 and bracing frame 13.Distributor chute can be made semicircle or U type cross section.At material impact zone 2 wedge shape ring texture wear-resistant liner layer 3 is installed, at material sliding area 4 uniform thickness ring texture wear-resistant liner layer 5 is installed, the wedge shape ring-type inclined-plane of wear-resistant liner layer 3 upper surface and chute axis angle are generally 10 °～60 °, and optimum angle is 25 °～45 °; The length of wear-resistant liner layer 3 is 15%～50% of chute total length.The thickness of wear-resistant liner layer 5 is determined according to operating mode, is generally 5～100mm.It is definite that cambridge ring 3 inclination angle of inclined plane and length are impacted the drop point statistical law by material in the blast furnace material distribution operating process, with the direct surging force of dispersed material that guarantees that cambridge ring 3 is play a part.
Referring to Fig. 4.The wear-resistant liner layer of two kinds of shapes is composited by ceramic rod 8, metal wire screen in nanometer structure 9 and compound material 10.Ceramic embedded excellent 8 in the mesh of metal wire screen in nanometer structure 9, compound material 10 is inserted curing molding in the metal wire screen in nanometer structure 9 residue slits.Ceramic rod 8 axis and distributor chute axis angle can determine that ceramic rod 8 axis optimum orientations are as far as possible near being parallel to the material falling direction according to chute along continuous straight runs inclination angle scope in the actual blast furnace material distribution operating process.Ceramic rod 8 axis and chute axis angle are generally 30 °～90 °.Ceramic rod 8 diameters are 1～20mm, and material can be selected alumina rod or carbonization tungsten bar for use, or other mechanically resistant material etc.The volume fraction of ceramic rod 8 in trielement composite material is 30%～60%.
Referring to Fig. 4.Metal wire screen in nanometer structure 9 in wedge shape ring texture wear-resistant liner layer 3 and the uniform thickness ring texture wear-resistant liner layer 5 all is closely stacked, and its plane and ceramic rod 8 axis are perpendicular.These metal wire screen in nanometer structure 9 mesh sizes are 1～20mm, and wire diameter is 0.1～3mm.Material can be selected nanostructure soft steel, medium carbon steel, high carbon steel wire for use; The metastable material metal silk of the perhaps basic, normal, high carbon alloy steel wire of nanostructure, or nanostructure manganese steel is made.The volume fraction of metal wire screen in nanometer structure 9 in trielement composite material is 20%～40%.
Compound material 10 can also be made up of inorganics powder and heat stable resin, and its weight ratio is 1.5～3: 1; The inorganics powder is aluminum oxide powder, carborundum powder, nitrogenize titanium valve, carbonized titanium powder or tungsten carbide powder, and granularity is 5～100um, and heat stable resin is Resins, epoxy or resol.The volume fraction of compound material 10 in trielement composite material is 20%～30%.
Referring to Fig. 1 and Fig. 3.Wedge shape ring texture wear-resistant liner layer 3 and uniform thickness ring texture wear-resistant liner layer 5 fix by welding briquetting and circular fin with steel bushing skin 1.Outer 1 front end of steel bushing is provided with circular fin 7, and the front end upper limb is fixed with briquetting 6, is welded with fastening briquetting 11 in its back-end.This briquetting 11 can be the ring-type briquetting, also can evenly fix 4～6.The wear-resistant liner layer is fixed in the steel bushing skin 1, and is not subjected to displacement.
The step of preparation process of the embodiment of the invention 1 is as follows, referring to technical process Figure 10.
A, making steel bushing outer 1 and the same common process of other auxiliary component;
The processing step of making the wear-resistant liner layer is as follows:
B, by braiding net machine braiding metal wire screen in nanometer structure 9; Carry out cleanup acid treatment;
C, according to the geomery and the ceramic rod 8 axis arragement directions of wear- resistant liner layer 3,5, shear, superimposed metal wire screen in nanometer structure 9;
D. ceramic rod 8 closely is embedded in the mesh of metal wire screen in nanometer structure 9;
E. prepare compound material 10; Compound material 10 is made up of cement, aluminum oxide powder and water, cement aluminium Barbiturates cement, and the granularity of aluminum oxide powder is 5～100um.The weight ratio of cement, aluminum oxide powder and water is: 20～40%: 40～70%: 10～20%.
The compound material 10 that f. will prepare is pressed into or inserts in the metal wire screen in nanometer structure 9 remaining slits curing molding by three-dimensional bumper vibrations; Promptly make the wear-resistant liner layer.
G. make up mount; The wear-resistant liner layer of making is placed in outer 1 cavity of steel bushing, fastening briquetting 11 and circular fin 7 is welded on the outer 1 internal surface corresponding position of steel bushing, and briquetting 6 is weldingly fixed on the outer 1 front end upper limb of steel bushing.
A kind of trielement composite material inner liner blast furnace material distribution chute is referring to Fig. 5, Fig. 6, Fig. 3 and Fig. 4.The wedge shape ring texture wear-resistant liner layer 3 and the uniform thickness ring texture wear-resistant liner layer 5 of present embodiment are processed into two independent parts separately.Wedge shape ring texture wear-resistant liner layer 3 is fixing by rear end briquetting 11 and 14 welding of impact zone 2 upper limb briquettings with steel bushing outer 1.On top edge fixed briquetting 6, briquetting 14 weld fixing wear-resistant liner layer 5 with it by front end fixed circular fin 7 with steel bushing outer 1.Wedge shape ring texture wear-resistant liner layer 3 and wear-resistant liner layer 5 are fixed in the steel bushing skin 1, and are not subjected to displacement.Other structure is with embodiment 1.
The step of preparation process of the embodiment of the invention 2 is as follows, referring to technical process Figure 10.
A, making steel bushing outer 1 and the same common process of other auxiliary component;
The processing step of making the wear-resistant liner layer is as follows:
B, by braiding net machine braiding metal wire screen in nanometer structure 9; Carry out cleanup acid treatment;
C, according to the shape and the gauge of wedge shape ring texture wear-resistant liner layer 3 and uniform thickness ring texture wear-resistant liner layer 5, and ceramic rod 8 axis arragement directions are sheared, superimposed metal wire screen in nanometer structure 9;
D. ceramic rod 8 closely is embedded in the mesh of metal wire screen in nanometer structure 9;
E. prepare compound material 10; Compound material 10 is made up of inorganics powder and heat stable resin, and the inorganics powder is selected aluminum oxide powder for use, also available carborundum powder, nitrogenize titanium valve, carbonized titanium powder or tungsten carbide powder, and granularity is 5～100um; Heat stable resin is selected resol for use, also can select Resins, epoxy for use.The weight ratio of inorganics powder and heat stable resin is: 1.6: 1.
The compound material 10 that f. will prepare is pressed into or inserts in the metal wire screen in nanometer structure 9 remaining slits curing molding by three-dimensional bumper vibrations; Promptly make wedge shape ring texture wear-resistant liner layer 3 and uniform thickness ring texture wear-resistant liner layer 5.
G. make up mount; Wedge shape ring texture wear-resistant liner layer of making 3 and uniform thickness ring texture wear-resistant liner layer 5 are placed in outer 1 cavity of steel bushing, fastening briquetting 11 and circular fin 7 are welded on the outer 1 internal surface corresponding position of steel bushing, briquetting 6 is weldingly fixed on the outer 1 front end upper limb of steel bushing, briquetting 14 is weldingly fixed on the position of outer 1 middle part edge wedge shape ring texture wear-resistant liner layer 3 of steel bushing and uniform thickness ring texture wear-resistant liner layer 5 binding site.
A kind of trielement composite material inner liner blast furnace material distribution chute is referring to Fig. 7, Fig. 8, Fig. 9 and Fig. 2.The wedge shape ring texture wear-resistant liner layer 3 of present embodiment and uniform thickness ring texture wear-resistant liner layer 5 also can fix by bolt 15 with steel bushing skin 1.Correct position is embedded in nut 16 in wedge shape ring texture wear-resistant liner layer 3 and wear-resistant liner layer 5, is provided with screw in outer 1 corresponding position of steel bushing, fixes with bolt 15.Other structure is with embodiment 1.The step of preparation process of the embodiment of the invention 4 is with embodiment 1, referring to technical process Figure 10.
Claims (6)
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| CN101798608A (en) * | 2010-03-22 | 2010-08-11 | 本钢板材股份有限公司 | Protective layer arranged outside distribution chute of blast furnace and preparation method thereof |
| CN109248777A (en) * | 2018-12-03 | 2019-01-22 | 辽宁工程技术大学 | Mining chute of a kind of epoxy resin filled and process aluminum laminated structure and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2503072Y (en) * | 2001-10-09 | 2002-07-31 | 武汉钢铁(集团)公司 | Blast furnace distributing chute |
| CN1362327A (en) * | 2001-12-27 | 2002-08-07 | 西安建筑科技大学 | Composite lining with metal wire screen in nanometer structure and its production process |
| CN2567231Y (en) * | 2002-08-13 | 2003-08-20 | 张守权 | Compound blast furnace chute liner |
| CN2786133Y (en) * | 2005-02-03 | 2006-06-07 | 西安建筑科技大学 | Blast furnace distribution chute with three-material composite inner lining |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2503072Y (en) * | 2001-10-09 | 2002-07-31 | 武汉钢铁(集团)公司 | Blast furnace distributing chute |
| CN1362327A (en) * | 2001-12-27 | 2002-08-07 | 西安建筑科技大学 | Composite lining with metal wire screen in nanometer structure and its production process |
| CN2567231Y (en) * | 2002-08-13 | 2003-08-20 | 张守权 | Compound blast furnace chute liner |
| CN2786133Y (en) * | 2005-02-03 | 2006-06-07 | 西安建筑科技大学 | Blast furnace distribution chute with three-material composite inner lining |
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Assignee: Tongchuan Zhongxing Material Co.,Ltd. Assignor: XIAN University OF ARCHITECTURE AND TECHNOLOG Contract fulfillment period: 2009.4.1 to 2015.2.2 Contract record no.: 2009610000070 Denomination of invention: Trielement composite material inner liner blast furnace material distribution chute and its preparation technology Granted publication date: 20070606 License type: Exclusive license Record date: 20091127 |
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Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.4.1 TO 2015.2.2; CHANGE OF CONTRACT Name of requester: TONGCHUAN ZHONGXIN MATERIALS CO., LTD Effective date: 20091127 |