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Smelting furnace and smelting method for extracting valuable metals from laterite-nickel ore

A technology of laterite nickel ore and valuable metals, which is applied in furnaces, furnace materials, crucible furnaces, etc., can solve the problems of difficult and efficient utilization of low-grade laterite nickel ore, and achieve the effects of reducing the difficulty of smelting, large processing capacity, and fast smelting speed

Inactive Publication Date: 2020-11-27
湖南锐异资环科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the deficiencies in the prior art, one of the purposes of the present invention is to provide a smelting furnace for extracting valuable metals from laterite nickel ore, so as to solve the problem that the prior art is difficult to efficiently utilize low-grade laterite nickel ore; the present invention The second purpose is to provide a smelting method for extracting valuable metals from laterite nickel ore

Method used

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  • Smelting furnace and smelting method for extracting valuable metals from laterite-nickel ore
  • Smelting furnace and smelting method for extracting valuable metals from laterite-nickel ore
  • Smelting furnace and smelting method for extracting valuable metals from laterite-nickel ore

Examples

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Embodiment 1

[0050] see figure 2 with image 3 , a smelting furnace for extracting valuable metals from laterite nickel ore, comprising a furnace body with a furnace chamber, the furnace body is divided into hearth section 2, furnace body section A and furnace top section 10- 1. The bottom side of the hearth section 2 is connected with an electric heating front bed 23, and the electric heating front bed 23 is provided with a slag discharge port 17-1 and a siphon port 17-2, and the inner end of the siphon port 17-2 is located The position is lower than the position of the inner end of the slag discharge port 17-1, the bottom area of ​​the inner cavity of the electric heating front bed 23 is 1.3 of the bottom area of ​​the inner cavity of the hearth section 2, and the electric heating front bed 23 is provided with electrodes 22 for heating ; The inner bottom surface of the hearth section 2 is inclined towards the direction where the electric heating front bed 23 is located, and the angle b...

Embodiment 2

[0064] Repeat Example 1, the difference is that in the present embodiment, Ni1.01wt% is contained in the laterite nickel ore, and the mass ratio of laterite nickel ore, reducing agent, matte-making agent, and flux is 100:8:18:10, wherein , the reducing agent is waste activated carbon, the flux is mixed with calcium carbonate and sodium carbonate at a mass ratio of 2:1, the melting temperature is 1300°C, and the oxygen concentration in the oxygen-enriched gas is 32vol%. The nickel grade in the obtained slag phase is 0.16wt%, and the nickel grade in the metal phase is 22.4wt%.

Embodiment 3

[0066] Repeat Example 1, the difference is that in the present embodiment, Ni1.34wt% is contained in the laterite nickel ore, and the mass ratio of laterite nickel ore, reducing agent, matte-making agent, and flux is 100:10:20:14, wherein , the reducing agent is coke, the flux is mixed with calcium carbonate and sodium carbonate at a mass ratio of 1:1, and the melting temperature is 1300°C. The nickel grade in the obtained slag phase is 0.12wt%, and the nickel grade in the metal phase is 19.5wt%.

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Abstract

The invention relates to a smelting furnace and a smelting method for extracting valuable metals from laterite-nickel ore. The smelting furnace comprises a furnace body with a furnace chamber, the furnace body is sequentially divided into a hearth section, a furnace body section and a furnace top section from bottom to top; the bottom side of the hearth section is in communication with an electricheating fore well, the electric heating fore well is provided with a deslagging port and a siphon port, the position of the inner end of the siphon port is lower than the position of the inner end ofthe deslagging port, and the bottom area of an inner cavity of the electric heating fore well is 1 / 2-3 / 2 of the bottom area of an inner cavity of the hearth section; the inner bottom face of the hearth section inclines in the direction where the electric heating fore well is located, and the included angle between the inner bottom face of the hearth section and the horizontal plane is 5degrees-20degrees. After the laterite-nickel ore, the additive, the flux and the like are mixed, the mixture can be directly smelted in a smelting furnace, pelletizing treatment is not needed, and the smeltingprocess is simplified. The smelting furnace can be used for carrying out direct, efficient and low-energy-consumption oxygen-enriched smelting on the low-grade laterite-nickel ore to generate nickelmatte, nickel matte and the like with economic values.

Description

technical field [0001] The invention relates to a smelting furnace and a smelting method for extracting valuable metals from laterite nickel ore, belonging to the technical field of comprehensive recovery of nonferrous metals. Background technique [0002] Most of the current laterite nickel ores are low-grade laterite nickel ores with a nickel grade of 0.8%~1.8% and an iron grade of 15~45%. There are three main types of laterite nickel ore development and utilization processes, wet leaching process, pyrometallurgical process and reduction roasting-magnetic separation process. Wet leaching process includes reduction roasting-ammonia leaching process, pressurized acid leaching, atmospheric pressure acid leaching and microbial leaching. These methods can effectively treat laterite nickel ore, but there are still high costs, large investment, and difficult maintenance. Inevitable shortcomings. [0003] Due to the large demand for nickel in China's stainless steel industry, 70...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B23/02C22B5/10F27B14/14F27B14/18F27D3/15
CPCC22B23/025C22B5/10F27B14/14F27B14/0806F27D3/1518F27D3/1554F27B2014/0818F27M2003/13
Inventor 李琛谢龙臣梁超龙森韩旭
Owner 湖南锐异资环科技有限公司
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