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Method for directly smelting nickel through top-side composite smelting

A direct, molten pool smelting technology, applied in the field of metallurgy, can solve the problems of high content of valuable metals in smelting slag, high raw material feeding conditions, low energy utilization rate, etc., and achieves strong adaptability of raw materials, high fuel utilization rate, and low load. Effect

Inactive Publication Date: 2021-10-15
JINCHUAN GROUP LIMITED
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Problems solved by technology

[0009] Aiming at the above-mentioned technical problems, the present invention provides a method for direct nickel smelting by top-side composite smelting, aiming at the high conditions for feeding raw materials into the furnace, high valence metal content in smelting slag, high energy consumption, and low energy utilization rate in the DON process in the prior art. low problem

Method used

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  • Method for directly smelting nickel through top-side composite smelting
  • Method for directly smelting nickel through top-side composite smelting
  • Method for directly smelting nickel through top-side composite smelting

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Embodiment 1

[0055] equipment such as figure 1 As shown, the specific process is as follows:

[0056] (1) Nickel sulfide concentrate ingredients: nickel sulfide concentrate (containing 6.52% Ni, 3.12% Cu, 0.20% Co, 30.8% Fe, 8.3% MgO), quartz flux, Reductant (lump coal), system return materials (chute slagging, ladle slag, smoke) are batched by quantitative feeder, and the weight ratio of each material is about: nickel concentrate: quartz stone flux: first reducing agent = 100: 12.5:2.0, after batching, the mixed material is transported to the top of the melting furnace through the belt conveyor, and is fed into the furnace through the double-point feeding port on the top of the furnace through the moving belt conveyor.

[0057] (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 a...

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Abstract

The invention discloses a method for directly smelting nickel through top-side composite smelting. The method comprises the following steps that firstly, nickel smelting raw materials are conveyed through a raw material conveying mechanism, and the nickel smelting raw materials comprise nickel sulfide concentrate, flux, fuel and a reducing agent; the nickel smelting raw materials are conveyed into a molten pool smelting area and a smelting reduction area of a furnace body through a furnace top double-point feeding opening, a molten pool smelting reaction is conducted, and high-nickel matte with the content of 50-75 wt%, smelting slag and high-temperature sulfur-containing flue gas are obtained; the smelting slag is discharged from a slag discharge port 9, is connected through a hot slag chute and enters a sedimentation electric furnace from a furnace top receiving port of the sedimentation electric furnace for slag overheating, clarification, sedimentation and separation, and sedimentation slag and metallized nickel matte are produced; and subsequent treatment is carried out on the flue gas. The method can solve the problems of high raw material charging condition, high valuable metal content in the smelting slag, high energy consumption and low energy utilization rate in the DON process in the prior art.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a top-side composite smelting direct 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 The final product, or sent to the wet process for direct 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 slag ...

Claims

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Application Information

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IPC IPC(8): C22B23/02
CPCC22B23/02
Inventor 姚树明孙治忠于英东何强屈永保乐国斌王砚林刘想成王旭滨唐伟栋刘振元汪振东魏开栋杨晓祥
Owner JINCHUAN GROUP LIMITED
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