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Method for recycling valuable components from copper-containing slag

A technology for slag and copper slag, which is applied in the field of slag metallurgy and can solve the problems of heavy metal element pollution, reducing copper content in slag, 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 in the slag, making the copper content in the slag <0.1wt%, but also realizes the efficient recovery of components such as copper, iron, gold, silver, lead, and zinc, and obtains low Copper and iron-containing materials such as iron concentrate and pig iron, and solve the current problems of massive accumulation of slag, environmental pollution and heavy metal element pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0222] A method for recovering valuable components from copper-containing slag, comprising the steps of:

[0223] Step 1, slag mixing:

[0224] Put the copper-containing smelting slag obtained from the slag outlet of the smelting furnace in the "matte-making smelting" process, and the copper-containing blowing slag obtained from the slag outlet of the converting furnace in the "copper smelting" process into the DC electric arc furnace, and add lime and SiO 2 , MgO, Al 2 o 3 , forming a mixed slag; heating the mixed slag to a molten state to form a copper-containing reaction slag, and allowing the reaction slag to achieve natural mixing; real-time monitoring of the reaction slag to ensure both (a) and (b) parameters, to obtain the slag after the reaction is completed; corresponding to (a): the temperature of the copper-containing reaction slag is 1660°C, and a refractory spray gun is inserted into the reaction slag, with nitrogen as the loading gas, and sprayed into the norma...

Embodiment 2

[0228] A method for recovering valuable components from copper-containing slag, comprising the steps of:

[0229] Step 1, slag mixing:

[0230] Put the molten copper-containing smelting slag obtained from the slag outlet of the smelting furnace in the "matte smelting" process and the molten depleted slag obtained from the slag outlet of the depletion furnace into the pourable smelting reaction slag tank, and add limestone, dolomite, Red mud and FeO and Fe 2 o 3 , forming mixed slag; using oxygen-enriched air with a preheating temperature of 800°C, injecting anthracite and coke particles with a particle size of 20mm, and injecting natural gas at the same time, heating the mixed slag to a molten state to form a copper-containing reaction slag; real-time Monitor the reaction slag, and ensure the two parameters (a) and (b) at the same time through regulation to obtain the slag after the reaction is completed;

[0231] Corresponding to (a) the temperature of the copper-containin...

Embodiment 3

[0248] A method for recovering valuable components from copper-containing slag, comprising the steps of:

[0249] Step 1, slag mixing: the copper-containing smelting slag obtained from the slag outlet of the smelting furnace in the "matte smelting" process, the copper-containing blowing slag obtained from the slag outlet of the blowing furnace in the "copper smelting" process, and copper slag flotation The tailings are added to the induction furnace, and limestone and high-calcium red mud after desodiumization are added at the same time to form a mixed slag; with oxygen at a preheating temperature of 400°C, anthracite, coke particles and coal powder with a particle size of 20mm are injected to mix the slag Heating to a molten state to form a copper-containing reaction slag, which is mechanically stirred and mixed; real-time monitoring of the reaction slag, and ensuring the two parameters (a) and (b) through regulation at the same time to obtain the slag after the reaction is co...

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Abstract

The invention relates to a method for recycling valuable components from copper-containing slag. The method includes the steps that S1, clinker is mixed, wherein copper slag is added in a smelting reaction device, calcium-series mineral and an additive are added, mixed slag is formed, the mixed slag is heated to the molten state to be used as reaction slag and is evenly mixed, the reaction slag ismonitored 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, hot-state slag can be processed, molten copper slag physical heat resources and hot-state metallurgy flux are sufficiently utilized, cold-state clinker can also be processed; by adjusting the physicochemical property of the slag and using the mature physicochemical property of the copper-containing slag, the copper-containing slag metallurgy process is achieved, and the problem that because a large amount of clinker is stacked at present, environment pollution is caused and the problem of heavy metal element pollution are solved.

Description

technical field [0001] The invention belongs to the technical field of slag metallurgy, and in particular relates to a method for recovering valuable components from copper-containing slag. Background technique [0002] During the pyrometallurgical process of copper, a large amount of copper slag is produced, including copper-containing smelting slag, copper-containing blowing slag, copper pyrometallurgical depletion slag, and copper slag flotation tailings. [0003] Copper-containing smelting slag is produced in the "matte smelting" process of the copper pyrometallurgy process, and more than 20 million tons are discharged every year, and the cumulative stockpile currently reaches more than 200 million tons. With the continuous development of "matte smelting" technology, such as flash smelting furnace, Noranda furnace, Vanyukov furnace, Isa furnace, Osmelt furnace, Mitsubishi furnace, Jinfeng furnace, bottom blowing furnace, etc., The content of Cu, Fe and other metals in c...

Claims

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Application Information

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IPC IPC(8): C22B7/04C22B15/00C22B19/30C22B13/00C22B11/00
CPCC22B7/001C22B7/04C22B11/00C22B13/00C22B15/00C22B19/30Y02P10/20
Inventor 张力张武
Owner NORTHEASTERN UNIV
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