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Method used for combined treatment of copper slag and magnesium slag, and applications thereof

A combined treatment and magnesium slag technology, applied in the field of metallurgy, can solve the problems of low technological innovation ability, less than 1% copper slag iron utilization rate, high pollution, etc., to eliminate the problem of volume stability, eliminate poor volume stability, overcome active lower effect

Active Publication Date: 2019-08-23
BEIFANG UNIV OF NATITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The grade of iron in copper slag generally exceeds 40%, much higher than the average industrial grade of 29.1% in iron ore, but the utilization rate of iron in copper slag is less than 1%.
my country's magnesium industry generally has shortcomings such as small production scale, high pollution, high energy consumption, low level of technical equipment, and low technological innovation capability. How to make full use of magnesium slag has also become a major problem restricting the development of my country's magnesium industry.

Method used

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  • Method used for combined treatment of copper slag and magnesium slag, and applications thereof
  • Method used for combined treatment of copper slag and magnesium slag, and applications thereof
  • Method used for combined treatment of copper slag and magnesium slag, and applications thereof

Examples

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Embodiment 1

[0052] A kind of method of joint treatment copper slag and magnesium slag of the present embodiment, described method specifically comprises the following steps:

[0053] (1) Taking the smelting slow cooling copper slag of a copper smelter as raw material, its chemical composition (mass ratio %) measured by XRF is shown in Table 1.

[0054] (2) Put the industrial copper slag into the vibration mill and grind for 2 minutes, and control the particle size of the copper slag to be less than 200 mesh. Then the industrial copper slag after grinding and the self-powdering magnesium slag (its chemical composition (mass ratio %) is shown in Table 2) are put into the sealed sample preparation pulverizer after mixing according to the mass ratio of 62.5:100 Grind to below 200 mesh. The ground and mixed raw materials are pressed into cakes. Put the pressed sample into a high-temperature muffle furnace and raise the temperature to 1200°C and keep it warm for 2 hours, then take out the sam...

Embodiment 2

[0063] A kind of method of joint treatment copper slag and magnesium slag of the present embodiment, described method specifically comprises the following steps:

[0064] After grinding, industrial copper slag (composition is the same as in Example 1, and the particle size is less than 200 meshes), self-powdering magnesium slag (composition is the same as in Example 1), quartz sand and bauxite are in a mass ratio of 70:100:10:5 After mixing, put it into a sealed sample preparation grinder and grind it again to below 200 mesh. The ground and mixed raw materials are pressed into cakes. Put the pressed sample into a high-temperature muffle furnace and raise the temperature to 1200°C and keep it warm for 2 hours, then take out the sample and cool it with compressed air. After cooling, the mixed slag is ground by a vibration mill for 2 minutes and then subjected to magnetic separation. The magnetic separation method is wet weak magnetic separation, the magnetic separation current ...

Embodiment 3

[0069] A kind of method of joint treatment copper slag and magnesium slag of the present embodiment, described method specifically comprises the following steps:

[0070] After grinding, industrial copper slag (composition is the same as in Example 1, and the particle size is less than 200 meshes), self-powdering magnesium slag (composition is the same as in Example 1), quartz sand and bauxite are in a mass ratio of 80:100:10:5 After mixing, put it into a sealed sample preparation grinder and grind it again to below 200 mesh. The ground and mixed raw materials are pressed into cakes. Put the pressed sample into a high-temperature muffle furnace and raise the temperature to 1200°C and keep it warm for 2 hours, then take out the sample and cool it with compressed air. After cooling, the mixed slag is ground by a vibration mill for 2 minutes and then subjected to magnetic separation. The magnetic separation method is wet weak magnetic separation, the magnetic separation current ...

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Abstract

The invention relates to a method used for combined treatment of copper slag and magnesium slag, and applications thereof, and belongs to the technical field of metallurgy. The method comprises following steps: 1, industrial copper slag and self-pulverization magnesium slag are mixed at a mass ratio of (50-90):100 so as to obtain a mixed slag, the mixed slag is grinded until particle size is lowerthan 200 meshes, uniform mixing is carried out, and compacting is carried out so as to obtain pie-shaped mixed slag; and 2, the pie-shaped mixed slag is introduced into a muffle furnace, the temperature is increased to 1100 to 1300 DEG C at air atmosphere, constant temperature roasting is carried out for 1 to 3h, after roasting, obtained samples are taken out from the muffle furnace, are cooled with compressed air, and are subjected to fine grinding and magnetic separation so as to obtain iron-rich concentrate and silicate-rich phase mine tailing. The magnetic separation products can be usedin thermal insulation refractory materials and building materials; after improvement, mixed slag magnetic separation yield is increased from 38.71% to 69%; the recovery rate is increased from 52.07% to 81.14%; and mixed slag magnetic separation concentrate yield and recovery rate are increased greatly.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a method and application for jointly treating copper slag and magnesium slag. Background technique [0002] With the rapid development of our country's economy, the demand for mineral resources is also increasing. The development and utilization of secondary resources has become an important way for the metallurgical industry to achieve sustainable development. Copper slag contains a large number of available resources, the main minerals of which are iron silicate and magnetic iron oxide, fayalite (2FeO SiO 2 ), magnetite (Fe 3 o 4 ) and some amorphous glass composed of gangue. The grade of iron in copper slag is generally more than 40%, much higher than the average industrial grade of 29.1% in iron ore, but the utilization rate of iron in copper slag is less than 1%. Therefore, copper slag has important recycling value as a potential resource of iron. [0003...

Claims

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Application Information

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IPC IPC(8): C04B5/00
CPCC04B5/00
Inventor 蒋亮陈宇红韩凤兰李宁李涌泉董福元秦春卢辉
Owner BEIFANG UNIV OF NATITIES
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