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High-carbon ferrochrome smelting method and product

A high-carbon ferrochromium and smelting method technology, applied in the field of metallurgical industry, can solve the problems of high labor intensity of workers, many production links, difficult to collect, etc., and achieve low labor intensity, improved quality and performance, and excellent quality and performance. Effect

Active Publication Date: 2017-10-20
徐州宏阳新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the related art, chromium ore, coke and silica are used as raw materials for smelting high-carbon ferrochrome, wherein silica is used as a slagging agent, and the ratio of raw materials is strictly limited to the content of Mg and Al in the raw material not being too high, and the obtained high-carbon ferrochrome product poor quality and performance
In addition, the smelting of high-carbon ferrochromium in the related art adopts the traditional secondary casting process, which has many production links, complicated operation, high labor intensity of workers, many losses caused by molten iron dipping into the ladle, long casting time out of the furnace, and exacerbated the segregation of iron components. Affect product quality and performance, and generate more smoke, which is not easy to collect
In the related technology, water quenching is used to cool the slag, which is prone to explosion accidents and increases the amount of smoke

Method used

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  • High-carbon ferrochrome smelting method and product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0095] A method for smelting high-carbon ferrochrome, comprising:

[0096] Prepare materials according to the mass ratio of chromite, coke and stevensite at a ratio of 30:5:1, and the total weight of chromite, coke and stevensite is 20t;

[0097] The fine ore in chromite ore undergoes the pretreatment process of grinding, batching, ore blending, pelletizing, roasting and pelletizing in sequence, wherein the roasting temperature is 1000°C; the lump ore in chromite ore is crushed and pretreated; coke is processed by drying pretreatment;

[0098] The pretreated chromite, coke and stevensite are mixed in proportion and fed into the electric furnace for smelting. The smelting temperature is 1500°C and the smelting time is 5 hours;

[0099] After the smelting is completed, the obtained slag is collected by the transition bag and flows into the water. The volume ratio of water and slag is 2:1; after the smelting is completed, the obtained hard slag is returned to the furnace as a ra...

Embodiment 2

[0103] A method for smelting high-carbon ferrochrome, comprising:

[0104]The mass ratio of chromite, coke and stevensite is 70:15:10 and the total weight of chromite, coke and stevensite is 25t;

[0105] The fine ore in chromite ore undergoes the pretreatment process of grinding, batching, ore blending, pelletizing, roasting and pelletizing in sequence, wherein the roasting temperature is 1300°C; the lump ore in chromite ore is crushed and pretreated; coke is processed by drying pretreatment;

[0106] The pretreated chromite, coke and stevensite are mixed in proportion and fed into the electric furnace for smelting. The smelting temperature is 1650°C and the smelting time is 6 hours;

[0107] After the smelting is completed, the obtained slag is collected by the transition bag and flows into the water. The volume ratio of water and slag is 10:1; after the smelting is completed, the obtained hard slag is returned to the furnace for re-smelting; Below 5mm;

[0108] After the...

Embodiment 3

[0111] A method for smelting high-carbon ferrochrome, comprising:

[0112] The mass ratio of chromite, coke and stevensite is 40:8:3 and the total weight of chromite, coke and serpentine is 30t;

[0113] The fine ore in chromite ore undergoes the pretreatment process of grinding, batching, ore blending, pelletizing, roasting and pelletizing in sequence, in which the roasting temperature is 1200°C; the lump ore in chromite ore is crushed and pretreated; coke is processed by drying pretreatment;

[0114] The pretreated chromite, coke and stevensite are mixed in proportion and fed into the electric furnace for smelting. The smelting temperature is 1800°C and the smelting time is 8 hours;

[0115] After the smelting is completed, the obtained slag is collected by the transition bag and flows into the water. The volume ratio of water and slag is 4:1; after the smelting is completed, the obtained hard slag is returned to the furnace for re-smelting; Below 5mm;

[0116] After the ...

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Abstract

The invention provides a high-carbon ferrochrome smelting method and a product. According to the high-carbon ferrochrome smelting method, a magnesium-containing aid is used; a Mg component is added to raw materials and serves as a slag forming constituent; more importantly, the Mg component can adjust the proportions of Mg and Al (chrome iron ores contain Al) in the raw materials, effectively improves the reduction effect in a smelting process and can improve the quality and performances of the obtained product. The high-carbon ferrochrome smelting method has the beneficial effects that the process is simple, the manual labor intensity and the loss are low, little smoke is generated and is easy to collect and treat, and the environmental protection requirements can be satisfied. The high-carbon ferrochrome product is low in cost and easy to obtain and has excellent quality and performances.

Description

technical field [0001] The invention relates to the technical field of metallurgical industry, in particular to a high-carbon ferrochrome smelting method and products. Background technique [0002] Ferrochrome is the most important raw material for the production of stainless steel. It is mainly used in the production of stainless steel, ball bearing steel, tool steel, nitrided steel, heat-strength steel, quenched and tempered steel, carburized steel and hydrogen-resistant steel. This is due to the presence of chromium in stainless steel. There is only one element that determines the properties of stainless steel, which is chromium. Every stainless steel must contain a certain amount of chromium. The corrosion resistance of stainless steel mainly comes from chromium. Experiments have proved that the corrosion resistance of steel will be greatly improved only when the chromium content exceeds 12%. Therefore, the chromium content in stainless steel is generally not less than ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C35/00C22C33/04C22B1/02
CPCC22B1/02C22C33/04C22C35/005
Inventor 邵明阳吴海光王应青邵珠航李闯郑犇
Owner 徐州宏阳新材料科技股份有限公司
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