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All-component comprehensive utilization method for copper slag

A technology of full components and copper slag, which is applied in the direction of improving process efficiency, can solve the problems of ineffective control of dust, low recovery rate of iron-containing phases recovered by magnetic separation, and inability to effectively use materials, etc., to achieve reduction Exhaust gas emissions and environmental hazards, the effect of improving recovery rates and reducing emissions

Inactive Publication Date: 2018-11-06
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the iron in copper slag mainly exists in the form of fayalite, this determines that the recovery rate of iron-containing phases recovered by magnetic separation is low; The thermal energy stored in the tailings in the state and the SiO in the tailings 2 -CaO-Al 2 o 3 The substances that are the main components cannot be effectively utilized; the dust formed by volatile heavy metal elements such as zinc is not effectively controlled during the reduction process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for comprehensive utilization of all components of copper slag. Press copper slag: calcium oxide: aluminum oxide: the mass ratio of carbonaceous reducing agent is 1: (0.10~0.15): (0.012~0.042): (0.11~0.13), described copper slag, described calcium oxide, the The alumina and the carbonaceous reducing agent are mixed, crushed, and ground to a particle size of ≤0.074 mm to obtain a mixture.

[0031] The mixture is placed in a high-temperature reduction furnace, and reduced for 30-60 minutes under the conditions of feeding inert gas and 1300-1400° C. to separate slag and iron to obtain molten iron and slag.

[0032] The molten iron is sent to a steelmaking plant; the slag is formed-annealed-nucleated-crystallized to obtain glass-ceramics.

[0033] The annealing process: the annealing temperature is 650-700°C, and the annealing time is 120-150min;

[0034] The nucleation process: heating at 8-10°C / min to 700-750°C, and nucleation for 100-120min;

[0035] The crys...

Embodiment 2

[0040] A method for comprehensive utilization of all components of copper slag. Press copper slag: calcium oxide: aluminum oxide: the mass ratio of carbonaceous reducing agent is 1: (0.15~0.20): (0.042~0.060): (0.12~0.15), described copper slag, described calcium oxide, the The alumina and the carbonaceous reducing agent are mixed, crushed, and ground to a particle size of ≤0.074 mm to obtain a mixture.

[0041] The mixture is placed in a high-temperature reduction furnace, and reduced for 60-80 minutes under the conditions of feeding inert gas and 1400-1450° C. to separate slag and iron to obtain molten iron and slag.

[0042] The molten iron is sent to a steelmaking plant; the slag is formed-annealed-nucleated-crystallized to obtain glass-ceramics.

[0043] The annealing process: the annealing temperature is 600-630°C, and the annealing time is 100-120min;

[0044] The nucleation process: heating up to 680-700°C at 6-8°C / min, and nucleation for 80-100min;

[0045] The cry...

Embodiment 3

[0050] A method for comprehensive utilization of all components of copper slag. Press copper slag: calcium oxide: aluminum oxide: the mass ratio of carbonaceous reducing agent is 1: (0.20~0.28): (0.060~0.081): (0.14~0.16), described copper slag, described calcium oxide, the The alumina and the carbonaceous reducing agent are mixed, crushed, and ground to a particle size of ≤0.074 mm to obtain a mixture.

[0051] The mixture is placed in a high-temperature reduction furnace, and reduced for 80-120 minutes under the conditions of feeding inert gas and 1450-1550° C. to separate slag and iron to obtain molten iron and slag.

[0052] The molten iron is sent to a steelmaking plant; the slag is formed-annealed-nucleated-crystallized to obtain glass-ceramics.

[0053] The annealing process: the annealing temperature is 630-650°C, and the annealing time is 90-100min;

[0054] The nucleation process: heating at 5-6°C / min to 650-700°C, and nucleation for 60-80min;

[0055] The crystal...

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Abstract

The invention elates to an all-component comprehensive utilization method for copper slag. According to the technical scheme, the method comprises the steps that proportioning, mixing, crushing and grinding are carried out to obtain a mixture, specifically, in the proportioning step, the mass ratio of the copper slag to calcium oxide, aluminum oxide and a carbonaceous reducing agent is 1:(0.10-0.28):(0.012-0.081):(0.11-0.16); then the mixture is put into a high-temperature reduction furnace, inert gas is injected, the mixture is subjected to reduction for 30-120 min under the condition of 1300-1550 DEG C, the slag is separated from iron, and molten iron and furnace slag are obtained; the molten iron is delivered to a steel plant; the furnace slag is subjected to molding, annealing, nucleation and crystallization to obtain glass ceramics; and zinc steam generated in the reduction reaction process is collected, and zinc oxide dust formed by the zinc steam in air is delivered to a zinc-smelting plant. The copper slag can be utilized for making the zinc oxide dust, iron alloy products for steel production and the glass ceramics for the decorative architecture field; and the recovery rate of iron and zinc in the copper slag is improved, and the emission amount of waste slag and waste gas in the reduction process of the copper slag is reduced.

Description

technical field [0001] The invention belongs to the technical field of comprehensive utilization of copper slag. In particular, it relates to a comprehensive utilization method of all components of copper slag. Background technique [0002] According to the International Copper Study Group (ICSG), global refined copper production was approximately 23.3 million tonnes in 2016. my country's refined copper output accounts for more than 1 / 3 of the world's output, exceeding 8 million tons. At present, pyrometallurgy is the main process for producing copper, and its output accounts for about 80% of the world's copper output, and as high as 97% in my country. Calculated on the basis of 2.2 tons of slag produced per ton of matte, the amount of copper slag produced in my country in 2016 alone was about 17.6 million tons. Most of these copper slags are only stockpiled after being diluted or settled, which not only occupies land, but also the heavy metal elements in them have potent...

Claims

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Application Information

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IPC IPC(8): C22B7/04C22B7/02C22B5/10C22B19/34C22B19/30C21B13/00C03C10/00C03B32/02
CPCC03B32/02C03C10/0063C21B13/0006C22B5/10C22B7/02C22B7/04C22B19/30C22B19/34Y02P10/20
Inventor 马国军李志刘孟珂张翔闵梁邹晶晶
Owner WUHAN UNIV OF SCI & TECH