A method for smelting stainless steel mother liquor by utilizing stainless steel ashes

A stainless steel and ash technology, applied in the improvement of process efficiency, furnaces, electric furnaces, etc., can solve the problems of waste of resources, many metal oxides, small particle size, etc. The effect of recycling

Active Publication Date: 2021-10-08
湖州盛特隆金属制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Stainless steel ash includes stainless steel ingot grinding ash, stainless steel slab grinding ash, stainless steel cutting ash, stainless steel welding slag and other waste materials, which contain a large amount of precious metal oxides such as chromium oxide, molybdenum oxide, and nickel oxide. The by-products produced in the stainless steel production process of iron and steel enterprises, due to the many metal oxides in the ash material, the small particle size, and the low alloy recovery rate, make the stainless steel ash material backlog and stockpile, resulting in waste of resources and environmental pollution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A kind of method utilizing stainless steel ashes to smelt 316L stainless steel mother liquor, comprises the following steps:

[0023] a. The first package of materials: 1 ton of lime, 0.5 tons of carbon balls, 5 tons of stainless steel ash materials such as stainless steel ingot repair abrasives, stainless steel slab repair abrasives, stainless steel welding slag, 0.5 tons of ferrosilicon alloy, and other cutting waste stainless steel or A total of 20 tons of turning materials are added to the electric arc furnace, energized and melted. After a certain molten pool is formed, oxygen blowing is started to accelerate the melting. After all the steel materials are melted, product A is obtained; Heat can also react with metal oxides in stainless steel ash.

[0024] Other cutting waste stainless steel includes cutting waste stainless steel, stainless steel turning material, stainless steel cutting head and tail, etc., stainless steel waste other than stainless steel ash.

[...

Embodiment 2

[0030] A kind of method utilizing stainless steel ashes to smelt 316L stainless steel mother liquor, comprises the following steps:

[0031] a. The first package of materials: 1 ton of lime, 0.6 tons of carbon balls, 6 tons of waste materials such as stainless steel ingot repair abrasives, stainless steel slab repair abrasives, stainless steel welding slag, stainless steel cutting dust, 0.5 tons of ferrosilicon alloy, and other cutting waste A total of 21 tons of stainless steel or turning material is added to the electric arc furnace, energized and melted, and after a certain molten pool is formed, oxygen blowing is started to accelerate the melting, and when the steel material is completely melted, product A is obtained;

[0032] b. Subpackage feeding: Add 4 tons of waste materials such as stainless steel ingot repair abrasives, stainless steel slab repair abrasives, stainless steel welding slag, stainless steel cutting ash, 0.6 tons of ferrosilicon alloy, and 22 tons of othe...

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PUM

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Abstract

The invention discloses a method for smelting stainless steel mother liquor by using stainless steel ashes. Obtain product A; b, sub-package addition: add stainless steel ash, ferrosilicon alloy and other types of stainless steel waste to product A for smelting in turn to obtain product B; c, composition adjustment: add ferrosilicon alloy and silicon carbide alloy to product B, steel The mass percentage of silicon in the liquid is 0.4-0.8%, and the mass percentage of carbon is 0.9-1.6%, to obtain product C; d, tapping product C to obtain product D; e, smelting product D in an AOD furnace to obtain The stainless steel mother liquor required by the standard composition of the steel grade. The invention can significantly increase the metal yield of chromium, nickel, molybdenum and other elements, greatly promote the recycling of stainless steel ashes and waste metals, and is a brand-new process for smelting stainless steel mother liquor by utilizing stainless steel ashes raw materials.

Description

technical field [0001] The invention relates to the fields of metal smelting and metal recycling, in particular to a method for smelting stainless steel mother liquor by using stainless steel ashes. Background technique [0002] Stainless steel ash includes stainless steel ingot grinding ash, stainless steel slab grinding ash, stainless steel cutting ash, stainless steel welding slag and other waste materials, which contain a large amount of precious metal oxides such as chromium oxide, molybdenum oxide, and nickel oxide. The by-products produced in the stainless steel production process of iron and steel enterprises, due to the many metal oxides in the ash material, the small particle size, and the low alloy recovery rate, make the stainless steel ash material backlog and stockpile, resulting in waste of resources and environmental pollution. [0003] Publication No. CN106987680A applies for a Chinese invention patent for a method of using stainless grinding powder. By comp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C5/52C21C7/072C21C7/076C22C33/06
CPCC21C5/5264C21C5/527C21C7/072C21C7/076C22C33/06Y02P10/20
Inventor 钱奕好杨振杨继国高峻华俞苏徽沈华袁飞施勇
Owner 湖州盛特隆金属制品有限公司
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