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Method and device for preparing nickel matte

A technology of nickel matte and spray drying method, which is applied in the field of preparation of nickel matte, can solve the problem of no harmless disposal of sulfur slag, and achieve the effects of low valuable metal content, good fluidity, and low melting point

Pending Publication Date: 2020-09-25
CHINA ENFI ENGINEERING CORPORATION
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to provide a method and device for preparing nickel matte to solve the technical problem that the sulfur slag in the nickel matte preparation process has not been harmlessly disposed of in the prior art

Method used

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  • Method and device for preparing nickel matte
  • Method and device for preparing nickel matte
  • Method and device for preparing nickel matte

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] refer to figure 1

[0061] Top blowing pre-reduction stage

[0062] After the laterite nickel ore is dried in the sun, part of the free water is volatilized, and it is appropriate to loosen it moderately. Laterite nickel ore, reduced coal, vulcanizing agent (pyrite), and slagging flux (including desulfurization solid products) with suitable water content (water content 16-25%) are granulated by the disc granulator, and then sent by the belt conveyor The silo in front of the melting furnace is continuously fed into the melting furnace through a quantitative feeder and a mobile belt conveyor.

[0063] Oxygen-enriched air (~60%) and reducing gas are blown into the molten pool through the pulverized coal spray gun on the top of the furnace body, and the injection pressure of reducing gas and oxygen-enriched air is 0.2-0.8MPa. The combustion flame of the spray gun directly contacts the melt, and the combustion flue gas stirs the molten pool, which strengthens the mass tra...

Embodiment 2

[0073] Submerged electric furnace pre-reduction stage

[0074] After the laterite nickel ore is dried in the sun, part of the free water is volatilized, and it is appropriate to loosen it moderately. After the laterite nickel ore, reduced coal, vulcanizing agent (sulfur) and slagging flux (including desulfurization solid products) with suitable water content are granulated by the disc granulator, they are sent to the feeding bin of the electric furnace by the belt conveyor, and then passed through the quantitative feeder, The mobile belt conveyor continuously feeds into the electric furnace.

[0075] After adding the charge, start to melt with electricity. After the molten pool is formed, the stirring of the molten pool by the electric furnace itself strengthens the mass transfer of the molten pool, accelerates the reaction, and makes the lateritic nickel ore granular materials melt rapidly; lime and other fluxes are added from the feeding hole. Adjust the slag type and melti...

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Abstract

The invention discloses a method and device for preparing nickel matte. The method comprises the following steps that S1, a nickel-containing material, fuel, compressed air, a reduction agent and a sulfurizing agent are subjected to melting and pre-reduction in a smelting furnace, and liquid-state sulfonium-containing slag is obtained; S2, the liquid-state sulfonium-containing slag I fed into an electric heating reduction furnace to be subjected to reduction and slag-sulfonium separation, and nickel matte is obtained; and flue gas generated in the steps S1 and S2 is subjected to desulfurationthrough an active lime spray drying method, solid products obtained after desulfuration are all used as slag forming raw materials for nickel matte smelting, and desulfuration liquid products are cyclically used for spray drying desulfuration of flue gas. By means of the technical scheme, solid products obtained after desulfuration are all used as slag forming raw materials for nickel matte smelting, desulfuration liquid products continue to be cyclically used for spray drying desulfuration of flue gas, and zero discharge of sulfur dioxide is achieved; and by means of the manner, a closed circulation system is formed for product production, waste utilization and the environment protection control problem.

Description

technical field [0001] The invention relates to the technical field of metal smelting, in particular to a method and device for preparing nickel matte. Background technique [0002] Nickel has the characteristics of anti-oxidation, anti-corrosion, high temperature resistance, high strength, good ductility, etc. It has a wide range of uses, especially in the iron and steel and non-ferrous metal smelting industry. The proportion of consumption is the largest, followed by light industry, machinery manufacturing, chemical industry , petroleum and electric power industries, and the demand for nickel in high-tech fields is also very strong. [0003] The world's land-based nickel reserves are about 41.7 billion tons, 39.14% of which exist in the form of sulfide ores, while about 70% of the world's nickel is extracted from sulfide ores, and nickel in oxide deposits accounts for 60.16% of nickel reserves. With the depletion of economically available nickel sulfide ore and high-grade...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B23/02F27D17/00B01D53/50B01D1/18B01D1/30
CPCC22B23/025F27D17/008F27D17/004B01D53/504B01D53/502B01D1/18B01D1/30B01D2258/0283Y02P10/20Y02P10/25
Inventor 杨晓华郑步东代文彬
Owner CHINA ENFI ENGINEERING CORPORATION
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