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Method for recycling valuable components from nickel-containing smelting slag

A technology of smelting slag and molten slag, which is applied in the direction of improving process efficiency and can solve problems such as reduction, pollution of heavy metal elements, and environmental pollution.

Inactive Publication Date: 2018-02-16
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method of the invention is a new slag metallurgical process, which not only reduces the copper content of slag to make the copper content of the slag <0.1wt%, but also realizes copper, nickel, cobalt, iron, gold, silver, lead, zinc, indium, bismuth, and sodium High-efficiency recovery of components such as , potassium, etc., to obtain low-copper iron-containing materials (iron concentrate and pig iron), and solve the current problems of massive accumulation of slag, environmental pollution, and pollution of heavy metal elements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0227] A method for recovering valuable components from nickel-containing smelting slag, including the following steps:

[0228] Step 1, slag mixing:

[0229] Put the molten nickel smelting slag obtained from the slag outlet of the "matte-making process" process smelting furnace into the DC electric arc furnace, while adding lime and SiO 2 , MgO, Al 2 O 3 , Forming a mixed slag; heating the mixed slag to a molten state to form a reaction slag, and make the reaction slag to achieve natural mixing; real-time monitoring of the reaction slag, through regulation and control to ensure both (a) and (b) two parameters, Obtain the slag after the reaction is completed; corresponding to (a): the temperature of the reaction slag is 1660 ℃, and the refractory spray gun is used to insert the reaction slag, and nitrogen is used as the loading gas, and the normal temperature powdery copper slag with a particle size of ≤150μm Copper-containing soot, miscellaneous copper and copper-containing garbag...

Embodiment 2

[0233] A method for recovering valuable components from nickel-containing smelting slag, including the following steps:

[0234] Step 1, slag mixing:

[0235] Add the molten nickel smelting slag obtained from the slag outlet of the "copper matte nickel conversion" process into the pourable smelting reaction slag pot, while adding limestone, dolomite, red mud, FeO and Fe 2 O 3 , To form a mixed slag; use oxygen-enriched air with a preheating temperature of 600°C with a particle size of 20mm anthracite and coke particles, and inject natural gas to heat the mixed slag to a molten state to form a copper-containing reaction slag; monitor the reaction melting in real time Slag, by adjusting and controlling the two parameters (a) and (b) at the same time to obtain the slag after the reaction is completed;

[0236] Corresponding to (a) the temperature of the copper-containing reaction slag is 1660℃, and the refractory spray gun is inserted into the reaction slag, and the argon is used as the...

Embodiment 3

[0254] A method for recovering valuable components from nickel-containing smelting slag, including the following steps:

[0255] Step 1, slag mixing: the molten nickel smelting slag obtained from the "copper matte nickel conversion" process through the slag outlet of the lean furnace is added to the reverberatory furnace, while adding limestone and desodiumized high calcium red mud to form a mixture Slag: Use oxygen with a preheating temperature of 900°C to inject anthracite, coke particles and coal powder with a particle size of 20mm to heat the mixed slag to a molten state to form a copper-containing reaction slag, which is mechanically stirred and mixed; real-time monitoring of the reaction melting Slag, by adjusting and controlling the two parameters (a) and (b) at the same time to obtain the slag after the reaction is completed;

[0256] Corresponding to (a): The temperature of the copper-containing reaction slag is 1685℃. Add acidic metallized pellets and copper slag to the r...

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PUM

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Abstract

The invention relates to a method for recycling valuable components from nickel-containing smelting slag. The method includes the steps that nickel smelting slag is added in a reaction device, calcium-series mineral and an additive are added, mixed slag is formed, the mixed slag is heated to be in the molten state to be used as reaction slag and is evenly mixed, the reaction slag is monitored in real time, the mixed reaction slag is made to meet the condition a and the condition b at the same time through regulation and control, and slag subjected to reaction is obtained; and S2, separation and recycling are conducted. By means of the method, molten nickel slag physical heat resources and hot-state metallurgy flux can be sufficiently utilized, and cold-state clinker can also be processed;by adding the additive, conducting even mixing and controlling the slag oxygen position, slag metallurgy is achieved, and the synchronous separation technology for copper and iron in the nickel smelting slag is achieved; and the problem that because a large amount of clinker is stacked at present, environment pollution is caused, and heavy metal element pollution is caused are solved.

Description

Technical field [0001] The invention belongs to the technical field of slag metallurgy, and specifically relates to a method for recovering valuable components from nickel-containing smelting slag. Background technique [0002] During the process of pyrometallurgical smelting of nickel, a large amount of nickel smelting slag is produced. Nickel smelting slag includes nickel smelting slag produced by the "matte smelting" process, depleted slag after the "copper matte smelting" process, and top blowing smelting The nickel settles in the slag. my country's Jinchuan Company adopts "flash smelting" and "top blow smelting" for nickel concentrate smelting, which produces 1 million tons of nickel smelting slag every year, and the accumulated storage volume currently exceeds 10 million tons. The long-term storage of valuable components such as copper, iron, nickel, cobalt, zinc, lead, gold and silver in nickel smelting slag wastes resources and pollutes the environment. [0003] The iron ...

Claims

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Application Information

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IPC IPC(8): C22B7/04C22B15/00C22B23/02C22B19/30C22B13/02C22B11/02
CPCC22B7/004C22B7/04C22B11/023C22B13/025C22B15/0056C22B19/30C22B23/02Y02P10/20
Inventor 张力张武
Owner NORTHEASTERN UNIV
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