CN116004938B - Vanadium extraction slag regulating agent and preparation method thereof - Google Patents
Vanadium extraction slag regulating agent and preparation method thereofInfo
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- CN116004938B CN116004938B CN202211736041.8A CN202211736041A CN116004938B CN 116004938 B CN116004938 B CN 116004938B CN 202211736041 A CN202211736041 A CN 202211736041A CN 116004938 B CN116004938 B CN 116004938B
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
本发明公开了一种提钒调渣剂及其制备方法，涉及高炉炼铁领域，解决了现有的提钒调渣剂成本高、不便入炉、渣中MFe含量高及半钢残V高的问题。调渣剂由以下重量百分比组成：4～6％Al2O3，15‑22％SiO2，70～75％FeO，1.5～3％MgO，还提供一种提钒调渣剂的制备方法，按比例称取原料，混合第一处理时间，得到第一原料；将第一原料引入造粒装置进行成型造粒第二处理时间，得到成品的粒状调渣剂。通过调整适宜比例的调渣剂，加入适宜的Al2O3和SiO2，增大调渣剂中FeO的比例，调整MgO与Al2O3的比例，将Al2O3与MgO的质量比设定为1.2～4，渣中MFe含量及残留的钒被有效降低。This invention discloses a vanadium-extracting slag conditioner and its preparation method, relating to the field of blast furnace ironmaking. It solves the problems of existing vanadium-extracting slag conditioners, such as high cost, inconvenience in furnace loading, high MFe content in the slag, and high residual vanadium in semi-steel. The slag conditioner is composed of the following weight percentages: 4-6% Al₂O₃ , 15-22% SiO₂ , 70-75% FeO, and 1.5-3% MgO. A method for preparing the vanadium-extracting slag conditioner is also provided: raw materials are weighed according to a certain ratio, mixed for a first processing time to obtain a first raw material; the first raw material is introduced into a granulation device for a second processing time to obtain the finished granular slag conditioner. By adjusting the appropriate proportions of the slag conditioner, adding suitable amounts of Al₂O₃ and SiO₂ , increasing the proportion of FeO in the slag conditioner, and adjusting the ratio of MgO to Al₂O₃ , setting the mass ratio of Al₂O₃ to MgO to 1.2-4, the MFe content and residual vanadium in the slag are effectively reduced .
Description
Technical Field
The invention relates to the field of blast furnace ironmaking, in particular to a vanadium extraction slag regulating agent and a preparation method thereof.
Background
The converter vanadium extraction has higher requirement on the quality stability of vanadium-titanium-iron water, when the quality of molten iron fluctuates, a slag regulator needs to be added in the converter vanadium extraction process to control the slag state, so that the vanadium slag has good fluidity, the slag-iron separation is promoted, the iron content in the slag is reduced, the residual V content of semisteel is reduced, the vanadium recovery rate is improved, and the vanadium benefit is ensured.
The existing vanadium slag regulating agent has the defects of high cost, inconvenience in charging into a furnace, high content of MFe in slag and high V of semi-steel residue.
Disclosure of Invention
The invention aims to solve the problems of high cost, inconvenience in charging into a furnace, high MFe content in slag and high semisteel residual V of the existing vanadium extraction slag modifier, and the slag modifier has good slag forming effect by adjusting the mass ratio of Al 2O3 to MgO to be 1.2-4 by adjusting the slag modifier with a proper proportion, so that the MFe content in slag and residual vanadium are effectively reduced.
The invention adopts the following technical scheme for realizing the purposes:
The vanadium extraction slag modifier comprises, by weight, 4-6% of Al 2O3,15-22％SiO2, 70-75% of FeO and 1.5-3% of MgO, wherein the mass ratio of Al 2O3 to MgO is 1.2-4.
By adjusting the slag modifier with a proper proportion, adding proper Al2O3 and SiO2, increasing the proportion of FeO in the slag modifier, adjusting the proportion of MgO and Al2O3, and setting the mass ratio of Al2O3 to MgO to be 1.2-4, the slag modifier has good slag forming effect and high slag forming speed, and the MFe content and residual vanadium in slag are effectively reduced. Meanwhile, the raw materials are simple components with lower cost, the cost of the slag modifier is reduced, the slag is convenient to enter a furnace, the slag forming speed is high, the slag forming effect is good, and the application space is larger.
Optionally, the slag modifier comprises the following components in percentage by weight of 5% of Al 2O3,20％SiO2, 72% of FeO and 3% of MgO.
Optionally, the granularity of the Al 2O3 is 100-150 meshes.
Optionally, the granularity of the SiO 2 is 80-105 meshes.
Optionally, the granularity of FeO is 70-85 meshes.
Optionally, the slag modifier has a melting point of less than 1200 ℃.
The invention also provides a preparation method of the vanadium extraction slag modifier, which comprises the following steps:
s1, weighing raw materials according to a proportion, and mixing for a first treatment time to obtain a first raw material;
s2, introducing the first raw material into a granulating device for forming and granulating for a second treatment time to obtain the finished granular slag modifier.
Optionally, the first treatment time is 1-3 hours.
Optionally, the second treatment time is 3-4 hours.
Optionally, the diameter of the finished granular slag modifier is 10-13 mm.
Compared with the prior art, the invention has the advantages that:
1. According to the vanadium extraction slag modifier, the slag modifier with proper proportion is adjusted, proper Al 2O3 and SiO 2 are added, the proportion of FeO in the slag modifier is increased, the proportion of MgO and Al 2O3 is adjusted, and the mass ratio of Al 2O3 to MgO is set to be 1.2-4, so that the slag modifier has good slag forming effect and high slag forming speed, and the MFe content and residual vanadium in slag are effectively reduced. Meanwhile, the raw materials are simple components with lower cost, so that the problems of high cost, inconvenience in feeding into a furnace, high MFe content in slag and high semisteel residual V (residual vanadium element) of the existing slag modifier are solved.
Specifically, by controlling the mass ratio of Al 2O3 to MgO, the content of MgO is increased, mgO is an alkaline oxide, when the content of MgO in the slag is increased, free oxygen ions are added to the system, and the free oxygen ions and bridging oxygen act, so that Si-O-O bonds are broken, the bonds between AlO 4 - and SiO 4 - are broken, the structure of the slag becomes complex, the heat storage capacity of a slag system is increased, the melting point of a vanadium slag regulator is reduced, good fluidity of vanadium slag is ensured, the slag-iron separation capacity of the vanadium slag system is ensured, and metal iron in the vanadium slag is reduced.
2. The preparation method of the vanadium extraction slag modifier is simple and has low preparation cost. At present, ferrosilicon, potassium/albite, quartz sand and the like are commonly used for extracting vanadium and regulating slag in China, and the defects of high preparation cost and complex preparation exist. The preparation method of the vanadium extraction slag modifier provided by the invention comprises the steps of providing raw materials in proportion, mixing, and granulating and forming to obtain the finished slag modifier.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments.
Thus, the following detailed description of the embodiments of the invention, as provided, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Detailed Description
The vanadium extraction slag modifier comprises, by weight, 4-6% of Al 2O3,15-22％SiO2, 70-75% of FeO and 1.5-3% of MgO, wherein the mass ratio of Al 2O3 to MgO is 1.2-4.
It can be understood that the vanadium extraction slag modifier provided by the invention has the advantages that the slag modifier with proper proportion is adjusted, proper Al2O3 and SiO2 are added, the proportion of FeO in the slag modifier is increased, the proportion of MgO and Al2O3 is adjusted, and the mass ratio of Al2O3 to MgO is set to be 1.2-4, so that the slag modifier has good slag forming effect and high slag forming speed, and the MFe content and residual vanadium in slag are effectively reduced. Meanwhile, the raw materials are simple components with lower cost, so that the problems of high cost, inconvenience in feeding into a furnace, high MFe content in slag and high semisteel residual V of the existing slag modifier are solved.
Specifically, by controlling the mass ratio of Al 2O3 to MgO, the content of MgO is increased, mgO is an alkaline oxide, when the content of MgO in the slag is increased, free oxygen ions are added to the system, and the free oxygen ions and bridging oxygen act, so that Si-O-O bonds are broken, the bonds between AlO 4 - and SiO 4 - are broken, the structure of the slag becomes complex, the heat storage capacity of a slag system is increased, the melting point of a vanadium slag regulator is reduced, good fluidity of vanadium slag is ensured, the slag-iron separation capacity of the vanadium slag system is ensured, and metal iron in the vanadium slag is reduced.
In certain embodiments of the present invention, a preferred embodiment is provided wherein the slag modifier consists of, by weight, 5% Al 2O3,20％SiO2, 72% FeO,3% MgO.
In some embodiments of the invention, the Al 2O3 has a particle size of 100-150 mesh. It can be understood that the granularity of Al 2O3 is set to be 100-150 meshes, which is favorable for the reaction of Al 2O3 and a slag system, and further improves the slag melting speed, so that the slag melting speed is high.
In some embodiments of the invention, the SiO 2 has a particle size of 80-105 mesh.
In some embodiments of the invention, the FeO has a particle size of 70-85 mesh.
Therefore, the raw material granularity of the slag modifier is finer, the slag forming effect of the slag modifier is improved, the slag forming speed of the system is improved, the MFe content in slag is reduced, and the semisteel residual V is reduced.
In certain embodiments of the invention, the slag modifier has a melting point of less than 1200 ℃.
The invention also provides a preparation method of the vanadium extraction slag modifier, which comprises the following steps:
s1, weighing raw materials according to a proportion, and mixing for a first treatment time to obtain a first raw material;
s2, introducing the first raw material into a granulating device for forming and granulating for a second treatment time to obtain the finished granular slag modifier.
It can be understood that ferrosilicon, potassium/albite, quartz sand and the like are commonly used for extracting vanadium and mixing slag in China at present, and the defects of high preparation cost and complex preparation exist. The preparation method of the vanadium extraction slag modifier provided by the invention comprises the steps of providing raw materials in proportion, mixing, and granulating and forming to obtain the finished slag modifier.
In some embodiments of the invention, the granulation device may be a device, such as a granulator, capable of shaping the first feedstock into pellets.
In some embodiments of the present invention, the first treatment time is 1 to 3 hours.
In some embodiments of the present invention, the second treatment time is 3 to 4 hours.
In some embodiments of the invention, the diameter of the finished granular slag modifier is 10-13 mm. It can be understood that the diameter of the finished slag modifier is adjusted to 10-13 mm, so that the reaction speed of the slag modifier in a system can be improved, the slag forming speed is improved, and the slag forming effect is optimized.
Example 1
A vanadium extraction slag modifier 1 comprises, by weight, 4% of Al 2O3,19％SiO2, 75% of FeO and 2% of MgO, wherein the mass ratio of Al 2O3 to MgO is 1.2. The granularity of Al 2O3 is 110 meshes. The granularity of SiO 2 is 80 meshes. The particle size of the FeO is 71 mesh. The melting point of the slag modifier is less than 1200 ℃.
Example 2
A vanadium extraction slag modifier 2 comprises, by weight, 4.5% of Al 2O3,20％SiO2, 74% of FeO and 1.5% of MgO, wherein the mass ratio of Al 2O3 to MgO is 1.5. The granularity of the Al 2O3 is 120 meshes. The granularity of SiO 2 is 89 meshes. The particle size of the FeO is 85 meshes. The melting point of the slag modifier is less than 1200 ℃.
Example 3
A vanadium extraction slag modifier 3 comprises, by weight, 4% of Al 2O3,20％SiO2, 74.5% of FeO and 1.5% of MgO, wherein the mass ratio of Al 2O3 to MgO is 1.2. The granularity of Al 2O3 is 110 meshes. The granularity of SiO 2 is 80 meshes. The particle size of the FeO is 71 mesh. The melting point of the slag modifier is less than 1200 ℃.
Example 4
A vanadium extraction slag modifier 4 comprises, by weight, 4% of Al 2O3,21％SiO2, 73.5% of FeO and 1.5% of MgO, wherein the mass ratio of Al 2O3 to MgO is 1.2. The granularity of Al 2O3 is 110 meshes. The granularity of SiO 2 is 80 meshes. The particle size of the FeO is 71 mesh. The melting point of the slag modifier is less than 1200 ℃.
Example 5
A vanadium extraction slag modifier 5 comprises, by weight, 4% of Al 2O3,20％SiO2, 74.5% of FeO and 1.5% of MgO, wherein the mass ratio of Al 2O3 to MgO is 1.3. The granularity of the Al 2O3 is 120 meshes. The granularity of SiO 2 is 80 meshes. The particle size of the FeO is 83 meshes. The melting point of the slag modifier is less than 1200 ℃.
Example 6
A vanadium extraction slag modifier 6 comprises, by weight, 4% of Al 2O3,21％SiO2, 73.5% of FeO and 1.5% of MgO, wherein the mass ratio of Al 2O3 to MgO is 2.6. The granularity of the Al 2O3 is 100 meshes. The granularity of SiO 2 is 80 meshes. The particle size of the FeO is 82 meshes. The melting point of the slag modifier is less than 1200 ℃.
Example 7
A vanadium extraction slag modifier 7 comprises, by weight, 6% of Al 2O3,19％SiO2, 73.5% of FeO and 1.5% of MgO, wherein the mass ratio of Al 2O3 to MgO is 4. The granularity of Al 2O3 is 110 meshes. The granularity of SiO 2 is 80 meshes. The particle size of the FeO is 71 mesh. The melting point of the slag modifier is less than 1200 ℃.
Example 8
A vanadium extraction slag modifier 8 comprises, by weight, 5% of Al 2O3,20％SiO2, 72% of FeO and 3% of MgO, wherein the mass ratio of Al 2O3 to MgO is 1.6. The granularity of Al 2O3 is 140 meshes. The granularity of SiO 2 is 98 meshes. The particle size of the FeO is 78 meshes. The melting point of the slag modifier is less than 1200 ℃.
Test example 1. Performance test of slag modifier of the present invention
1.1 Design of experiments
Slag modifier 1-4 in examples 1-4 was selected as treatment group 1-4, commercial slag modifier was selected as control group, and was used for the slag state adjustment of vanadium slag, and the MFe content and the residual V content of semisteel in the slag were detected, and the test results are shown in the following table.
1.2 Analysis of results
| MFe (%) | Semisteel residue V (%) | |
| Treatment group 1 | 15 | 0.0321 |
| Treatment group 2 | 16 | 0.0352 |
| Treatment group 3 | 17 | 0.0386 |
| Treatment group 4 | 18 | 0.0395 |
| Control group | 22 | 0.0500 |
Referring to the table above, the MFe in the slag of treatment groups 1-4 related to the invention is lower and is below 18%, and the slag adjusting effect is good. In addition, the semi-steel residual V is also lower and is below 0.04 percent.
Compared with treatment groups 1-4, the control group of the commercial slag modifier has poorer slag modifying effect, the content of metal Fe in slag is high and is 22 percent, and the content of residual V is also high and is 0.05 percent.
In summary, according to the vanadium extraction slag modifier, the slag modifier with proper proportion is adjusted, proper Al 2O3 and SiO 2 are added, the proportion of FeO in the slag modifier is increased, the proportion of MgO and Al 2O3 is adjusted, and the mass ratio of Al 2O3 to MgO is set to be 1.2-4, so that the slag modifier has good slag forming effect and high slag forming speed, and the MFe content and residual vanadium in slag are effectively reduced. Meanwhile, the raw materials are simple components with lower cost, so that the problems of high cost, inconvenience in feeding into a furnace, high MFe content in slag and high semisteel residual V of the existing slag modifier are solved.
The above example is only one embodiment of the present invention, which is described in detail and is not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (6)
1. The vanadium extraction slag modifier is characterized by comprising, by weight, 4-6% of Al 2O3,15-22％SiO2, 70-75% of FeO and 1.5-3% of MgO, wherein the mass ratio of Al 2O3 to MgO is 1.2-4, the granularity of Al 2O3 is 100-150 meshes, the granularity of SiO 2 is 80-105 meshes, the granularity of FeO is 70-85 meshes, and the melting point of the slag modifier is less than 1200 ℃.
2. The vanadium extraction slag modifier according to claim 1, wherein the slag modifier comprises, by weight, 5% Al 2O3,20％SiO2%, 72% FeO and 3% MgO.
3. The preparation method of the vanadium extraction slag modifier based on any one of claims 1-2 is characterized by comprising the following steps:
s1, weighing raw materials according to a proportion, and mixing for a first treatment time to obtain a first raw material;
s2, introducing the first raw material into a granulating device for forming and granulating for a second treatment time to obtain the finished granular slag modifier.
4. The method for preparing the vanadium extraction slag modifier according to claim 3, wherein the first treatment time is 1-3 hours.
5. The method for preparing the vanadium extraction slag modifier according to claim 3, wherein the second treatment time is 3-4 hours.
6. The method for preparing the vanadium extraction slag modifier according to claim 3, wherein the diameter of the finished granular slag modifier is 10-13 mm.
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| CN101302578B (en) * | 2008-06-27 | 2010-06-16 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of composite vanadium extraction and dephosphorization agent for vanadium-containing molten iron and preparation method thereof |
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