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Method for determining smelting nickel-iron reducer dosage for ore smelting furnace

A technology to determine the method and reducing agent, which is applied in the field of ferronickel alloy smelting, can solve the problems of increased cost and lack of comprehensive utilization of resources, and achieve the effects of reducing the cost of ferronickel, maximizing benefits, and avoiding waste of resources

Inactive Publication Date: 2009-06-03
张美焦
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A large amount of iron is discarded when ferronickel is smelted, and a large amount of iron is added when ferronickel is used to smelt stainless steel. The two processes are not organically unified, not only the resources cannot be comprehensively utilized, but also the cost is significantly increased

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] After sintering, the nickel oxide ore contains 1.9% nickel, 19% iron, and 0.6% residual carbon. Using semi-coke as a reducing agent, the wet base contains 80% fixed carbon, and the ratio of carbon content to nickel content is 2. 100 tons of sintered ore contains 1.9 tons of nickel, 3.8 tons of carbon should be added, 0.6 tons of residual carbon in the sintered ore, the amount of carbon in semi-coke is 3.2 tons (3.8-0.6), and 4 tons of semi-coke should be added (3.2 / 80% ). The smelted ferronickel contains 10.5% nickel, and the nickel recovery rate is 92%.

Embodiment 2

[0014] After sintering, the nickel oxide ore contains 1.7% nickel, 12% iron, and 1.2% residual carbon. Using semi-coke as a reducing agent, the wet base contains 80% fixed carbon. Calculated as the ratio of carbon content to nickel content is 4, 100 tons of sintered ore contains 1.7 tons of nickel, 6.8 tons of carbon should be added, 1.2 tons of residual carbon in the sintered ore, the amount of carbon in semi-coke is 5.6 tons (6.8-1.2), and 7 tons of semi-coke should be added (5.6 / 80% ). The smelted ferronickel contains 12.05% nickel, and the nickel recovery rate is 95%.

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PUM

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Abstract

The invention relates to a Ni-Fe alloy smelting technique, particularly a method for determining the amount of reducer for Ni-Fe alloy smelting in submerged arc furnace. The ratio of carbon content in reducer for Ni-Fe alloy smelting in submerged arc furnace to nickel content in nickel oxide ore is 1.5-4. The carbon content of reducer includes the content of carbon residual in nickel sintered ore. The reducer is any carbon-containing material. Compared with the prior art, the invention has the advantages that by increasing the amount of reducer, the nickel content can meet the use requirement of stainless steel and the iron recycle rate is maximized, thereby reducing or avoiding resource waste; the nickel recovery rate is remarkably increased after reducing the nickel content in ferronickel, thereby reducing the cost of ferronickel; the nickel content is ferronickel is appropriate, so that waste iron and steel can not used or almost not used during stainless steel smelting, thereby reducing the cost of stainless steel; the processes for smelting ferronickel and stainless steel are incorporated to produce higher benefits.

Description

Technical field: [0001] The invention relates to nickel-iron alloy smelting technology, in particular to a method for determining the dosage of ferronickel reducing agent for smelting ferronickel in a submerged arc furnace. Background technique: [0002] Ferronickel is the raw material for the production of stainless steel, and its production is mainly smelted with nickel oxide ore as raw material in a submerged arc furnace. Ferronickel smelting has a history of decades in foreign countries, and the nickel content of the smelted ferronickel is not less than 20%, which is the standard for most manufacturers. Nickel oxide ore generally has low nickel content, and there is a big difference in iron content. In order to pursue high nickel content, it is necessary to control the reduction rate of iron. The carbon content of the reducing agent added to the submerged arc furnace is relatively low or even zero. Reduce iron as little as possible, so that iron enters the slag and disc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C33/04
Inventor 张美焦
Owner 张美焦