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A metallurgical fluoride-containing slag agent and its preparation method and application

A slag-reducing agent and metallurgical technology, applied in the metallurgical fluorinated slag agent and its preparation, in the field of iron and steel smelting production, can solve the problems that the application of electrolytic aluminum electrolyte solid waste has not been reported, and achieve the process method is simple and easy to use, use The effect of small amount and fast slag removal

Active Publication Date: 2021-11-23
莱芜钢铁冶金生态工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In summary, the above-mentioned patents are all about recycling red mud, and there are no reports on the solid waste application of electrolytic aluminum electrolyte

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] For a 120t converter, the amount of molten iron is 107.53t, steel scrap is 9.55t, the temperature of the incoming molten iron is 1350°C, and the S content of the molten iron is 0.18%. The P content of molten iron is 0.150%.

[0030] The weight percent of metallurgical fluoride-containing slag composition is: NaF: 53.50%, AlF 3 : 12.5%, Al 2 o 3 : 15.8%, MgF: 2.99%, CaF: 1.38%, KF: 0.65%, Fe 2 o 3 : 0.86%, (S+P): 1.7%, and the rest are unavoidable impurities.

[0031] A method for preparing a metallurgical fluoride-containing slag agent, the preparation method comprising the following steps:

[0032] According to the weight percentage of the above-mentioned metallurgical fluoride-containing slag agent, after the raw materials are fully stirred and evenly mixed, it is made into a powder and dried at 120° C. to obtain the metallurgical fluoride-containing slag agent.

[0033] The raw materials include electrolyte solid waste obtained by electrolyzing aluminum and alu...

Embodiment 2

[0036] 120t LF refining furnace, the amount of molten steel is 110.23t, the temperature of molten steel entering the station is 1580°C, and the S content of molten steel is 0.11%.

[0037] The composition of metallurgical fluoride-containing slag agent is: NaF: 43%, AlF 3 : 24.3%, Al 2 o 3 : 22.0%, MgF: 1.50%, CaF: 0.9%, Fe 2 o 3 : 0.38%, (S+P): 1.0%, and the rest are unavoidable impurities.

[0038] A method for preparing a metallurgical fluoride-containing slag agent, the preparation method comprising the following steps:

[0039] According to the weight percentage of the above metallurgical fluoride-containing slag agent, after the raw materials are fully stirred and evenly mixed, they are made into blocks and dried at 350°C to obtain the metallurgical fluoride-containing slag agent.

[0040] The raw materials include electrolyte solid waste obtained by electrolyzing aluminum and alumina. The main component of the electrolyte solid waste obtained from the electrolysis...

Embodiment 3

[0043] For a 120t converter, the amount of molten iron is 107.55t, steel scrap is 9.45t, the temperature of the incoming molten iron is 1350°C, and the S content of the molten iron is 0.18%. The P content of molten iron is 0.150%.

[0044]The weight percent of metallurgical fluoride-containing slag agent is: NaF: 35.50%, AlF 3 : 24.5%, Al 2 o 3 : 23.8%, MgF: 1.99%, CaF: 2.38%, KF: 2.65%, LiF: 1.65%, Fe 2 o 3 : 0.86%, (S+P): 0.80%, and the rest are unavoidable impurities.

[0045] A method for preparing a metallurgical fluoride-containing slag agent, the preparation method comprising the following steps:

[0046] According to the weight percentage of the above metallurgical fluoride-containing slag agent, the raw materials are thoroughly stirred and evenly mixed, made into granules, and dried at 220° C. to obtain the metallurgical fluoride-containing slag agent.

[0047] The raw materials include electrolyte solid waste obtained by electrolyzing aluminum and alumina. The...

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PUM

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Abstract

The invention belongs to the field of metallurgical engineering. Specifically, the invention discloses a metallurgical fluoride-containing slag agent, a preparation method and application thereof. The metallurgical fluoride-containing slag agent of the present invention is calculated according to the weight percentage of the composition: NaF: 15% to 70%, AlF 3 : 3.0%~35%, Al 2 o 3 : 3.5%~35%, MgF: 0~10%, CaF: 0~5%, LiF: 0~5%, KF: 0~5%, Fe 2 o 3 : <3.0%, S+P≤2.5%, others are unavoidable impurities, the main raw material is electrolyte solid waste mainly composed of cryolite produced in the production process of electrolytic aluminum, and part of alumina is added, and it is fully stirred After mixing, it exists in the form of powder, granules or strips, briquettes, and briquettes. The metallurgical fluorine-containing slag agent of the present invention has a simple and easy process method, fast slag formation and slag formation, and obviously improves the production rhythm. The present invention can completely replace fluorite or calcium carbide.

Description

technical field [0001] The invention belongs to the field of metallurgical engineering, and in particular relates to a metallurgical fluoride-containing slag agent and its preparation method and application, which are mainly used in iron and steel smelting production. Background technique [0002] my country is the largest producer of electrolytic aluminum in the world. The annual output of electrolytic aluminum is more than 10 million tons. In the process of electrolytic aluminum production, a large amount of solid waste products are also produced: electrolyte, the main component of which is cryolite. Under normal circumstances, the electrolytic aluminum plant takes out the electrolyte and stacks it as industrial solid waste, which not only causes a lot of waste of resources, but also causes serious environmental pollution. How to realize the comprehensive utilization of this solid waste has always been the research focus of the nonferrous metallurgy industry. [0003] Fluo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B5/04C21C5/36C21C7/076C21C7/064
CPCC21B5/04C21C5/36C21C7/0645C21C7/076Y02P10/20
Inventor 张思勋王兆存王慧玉郭秀辉
Owner 莱芜钢铁冶金生态工程技术有限公司