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One-step nickel smelting system and one-step nickel smelting method

A technology of nickel matte and nickel sulfide, applied in the field of metallurgy, can solve problems such as high energy consumption, high conditions for feeding raw materials into the furnace, and high nickel content in smelting slag

Active Publication Date: 2020-05-05
CHINA ENFI ENGINEERING CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The main purpose of the present invention is to provide a one-step nickel smelting system and a one-step nickel smelting method to solve the problems of high raw material feeding conditions, high nickel content in smelting slag, large load when the electric furnace alone processes smelting slag, and high energy consumption

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0095] equipment such as figure 1 As shown, the smelting process is as follows figure 2 As shown, the specific process is as follows:

[0096] (1) Nickel sulfide concentrate ingredients: nickel sulfide concentrate (containing 7.72% Ni, 1.42% Cu, 0.27% Co, 40.5% Fe, 5.8% MgO), quartzite flux, reducing agent (anthracite) , System return materials (launder shell, smoke dust) are batched by quantitative feeder, and the weight ratio of each material is about: nickel concentrate: quartz stone flux: first reducing agent = 100:32:2.5, after batching, the mixed material passes through The belt conveyor is transported to the top of the melting furnace, and is added to the furnace by moving the belt conveyor.

[0097] (2) After batching, the mixed concentrate undergoes a series of chemical events such as decomposition and oxidation in the smelting zone of the smelting furnace and the oxygen-enriched air blown into the molten pool, resulting in high-nickel matte, smelting slag and flue...

Embodiment 2

[0103] equipment such as figure 1 As shown, the smelting process is as follows figure 2 As shown, the specific process is as follows:

[0104] (1) Nickel sulfide concentrate ingredients: nickel sulfide concentrate (6.0% Ni, 3.2% Cu, 0.18% Co, 28.5% Fe, 8.2% MgO), quartzite flux, reducing agent (coke) , System return material (launder shell, smoke dust) is batched by quantitative feeder, and the weight ratio of each material is about: nickel concentrate: quartz stone flux: first reducing agent = 100:15.6:6.0, after batching, the mixed material passes through The belt conveyor is transported to the top of the melting furnace, and is added to the furnace by moving the belt conveyor.

[0105] (2) After batching, the mixed concentrate undergoes a series of chemical events such as decomposition and oxidation in the smelting zone of the smelting furnace and the oxygen-enriched air blown into the molten pool, resulting in high-nickel matte, smelting slag and flue gas. The generate...

Embodiment 3

[0111] equipment such as figure 1 As shown, the smelting process is as follows figure 2 As shown, the specific process is as follows:

[0112] (1) Nickel sulfide concentrate ingredients. Nickel sulfide concentrate (containing Ni19.53%, containing Cu1.11%, containing Co0.65%, containing Fe36.73%, containing MgO1.42%), quartzite flux, reducing agent (blue carbon), system return material (Launder shell, smoke and dust) are batched by quantitative feeder, and the weight ratio of each material is about: nickel concentrate: quartz stone flux: first reducing agent = 100:27.1:1.5. After batching, the mixed material is transported to The top of the melting furnace is fed into the furnace by a moving belt conveyor.

[0113] (2) After batching, the mixed concentrate undergoes a series of chemical events such as decomposition and oxidation in the smelting zone of the smelting furnace and the oxygen-enriched air blown into the molten pool, resulting in high-nickel matte, smelting slag ...

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Abstract

The invention provides a one-step nickel smelting system and a one-step nickel smelting method. The one-step nickel smelting system comprises a raw material conveying device, a one-step nickel smelting device and a flue gas treatment device; the one-step nickel smelting device is an integrated device and comprises a furnace body, and a molten pool smelting area and a reduction depletion area are sequentially arranged inside the furnace body; a first feeding inlet and a first blower nozzle are formed in the molten pool smelting area, the first feeding inlet is connected with the raw material conveying device, and the molten pool smelting area is used for performing molten pool smelting on nickel sulfide concentrates to produce high nickel matte containing 35-65 wt% nickel, smelting slag andflue gas; the reduction depletion area communicates with the molten pool smelting area, a second feeding inlet, a second blower nozzle and a flue gas outlet are formed in the reduction depletion area, and the reduction depletion area is used for enabling the smelting slag to be subjected to the depletion reaction to produce depleted slag and first metallized nickel matte; the flue gas treatment device is connected with the flue gas outlet. The problems such as high raw material feeding-into-furnace conditions of the DON process, high nickel content in the smelting slag, large load and high energy consumption when an electric furnace separately treats the smelting slag are effectively solved.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a one-step nickel smelting system and a one-step nickel smelting method. Background technique [0002] The pyrometallurgy process commonly used for nickel sulfide concentrate is as follows: the nickel concentrate is sent to the smelting furnace for smelting after material preparation and batching, the low-nickel matte produced by smelting is sent to the blowing furnace for blowing, and the high-nickel matte produced by blowing is cooled and used as Final product, or sent to wet process for further processing. The smelting slag produced by smelting is depleted by the electric furnace or the electrode area is depleted to produce waste slag. The blowing slag produced by blowing can be returned to the smelting furnace for treatment, or returned to the smelting electrode area or the settling electric furnace, or can be treated in a separate depletion electric furnace. If blowing ...

Claims

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Application Information

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IPC IPC(8): C22B23/02C22B5/02
CPCC22B23/021C22B5/02Y02P10/20C22B23/00
Inventor 李东波陆金忠李晓霞黎敏刘恺尉克俭王雪亮张海鑫李锋颜杰曹珂菲李海春李建辉吴玲徐小锋邬传谷吴金财孙晓峰潘璐赵永成曾璐
Owner CHINA ENFI ENGINEERING CORPORATION
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