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A method for preparing refractory material with copper smelting slag as raw material

A technology of copper smelting slag and refractory materials, which is applied in the field of resource utilization of solid waste, and can solve problems such as dispersion of valuable elements, large land resources, and environmental threats

Active Publication Date: 2021-12-24
YUNNAN COPPER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Non-ferrous metallurgical enterprises dump copper smelting slag in the open air, which not only occupies a large amount of land resources, but also poses a serious threat to the environment
Due to the coexistence of copper, iron, lead, zinc and other multi-metals in the copper smelting waste slag, the low degree of crystallization and the high dispersion of valuable elements, the copper smelting slag has technical problems that the valuable elements cannot be effectively utilized, and the comprehensive utilization rate of the copper smelting slag is extremely high. Low

Method used

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  • A method for preparing refractory material with copper smelting slag as raw material
  • A method for preparing refractory material with copper smelting slag as raw material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] The chemical composition of low-grade magnesite includes: MgO 43.56wt.%, CaO 0.98wt.%, SiO 2 3.88wt.%, Al 2 o 3 2.05wt.%, Fe 2 o 3 1.47wt.%, LOI 47.62wt.%;

[0060] The chemical composition of copper smelting slag includes: Cu 0.27wt.%, Fe 45.54wt.%, S 0.26wt.%, SiO 2 27.37wt.%, CaO 2.37wt.%, MgO 1.19wt.%, Al 2 o 3 3.96wt.%;

[0061] Put 10kg of low-grade magnesite in a roller crusher and crush to a particle size of 2mm, and calcinate the obtained low-grade magnesite particles at 800°C for 3 hours to obtain 5.15kg of lightly calcined magnesite powder;

[0062] Using 50 L of aqueous ammonium chloride solution with a concentration of 2.5 mol / L, the lightly burned magnesite powder was leached, the leaching temperature was 110° C., and the leaching time was 80 minutes to obtain a leaching solution;

[0063] Mix the leachate with 26 L of ammonia water with a concentration of 8 mol / L, carry out magnesium precipitation reaction at 550 rpm and 40°C for 60 minutes, an...

Embodiment 2

[0069] The chemical composition of low-grade magnesite includes: MgO 43.56wt.%, CaO 0.98wt.%, SiO 2 3.88wt.%, Al 2 o 3 2.05wt.%, Fe 2 o 3 1.47wt.%, LOI 47.62wt.%;

[0070] The chemical composition of copper smelting slag includes: Cu 0.27wt.%, Fe 45.54wt.%, S 0.26wt.%, SiO 2 27.37wt.%, CaO 2.37wt.%, MgO 1.19wt.%, Al 2 o 3 3.96wt.%;

[0071] Put 10kg of low-grade magnesite in a roller crusher and crush to a particle size of 2mm, and calcinate the obtained low-grade magnesite particles at 800°C for 2 hours to obtain 5.2kg of lightly calcined magnesite powder;

[0072] Using 52 L of aqueous ammonium chloride solution with a concentration of 2 mol / L, the lightly burned magnesite powder was leached, the leaching temperature was 115° C., and the leaching time was 70 minutes to obtain a leaching solution;

[0073] The leaching solution was mixed with 30.6L of ammonia water with a concentration of 7mol / L, and the magnesium precipitation reaction was carried out at 500rpm an...

Embodiment 3

[0079] The chemical composition of low-grade magnesite includes: MgO 43.56wt.%, CaO 0.98wt.%, SiO 2 3.88wt.%, Al 2 o 3 2.05wt.%, Fe 2 o 3 1.47wt.%, LOI 47.62wt.%;

[0080] The chemical composition of copper smelting slag includes: Cu 0.27wt.%, Fe 45.54wt.%, S 0.26wt.%, SiO 2 27.37wt.%, CaO 2.37wt.%, MgO 1.19wt.%, Al 2 o 3 3.96wt.%;

[0081] Put 10kg of low-grade magnesite in a roller crusher and crush to a particle size of 2mm, and calcinate the obtained low-grade magnesite particles at 800°C for 1 hour to obtain 5.27kg of lightly calcined magnesite powder;

[0082] Using 47.43 L of aqueous ammonium chloride solution with a concentration of 3 mol / L, the lightly burned magnesite powder was leached, the leaching temperature was 120° C., and the leaching time was 60 minutes to obtain a leaching solution;

[0083]Mix the leaching solution with 39 L of ammonia water with a concentration of 5 mol / L, carry out magnesium precipitation reaction at 450 rpm and 50°C for 70 min...

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Abstract

The invention belongs to the technical field of resource utilization of solid waste, in particular to a method for preparing a refractory material using copper smelting slag as a raw material. The method for preparing a refractory material using copper smelting slag as raw material provided by the present invention comprises the following steps: mixing copper smelting slag, magnesia and a binder, and performing ball milling to obtain a mixture; performing molding treatment and drying on the mixture in sequence and sintering to obtain the refractory material. The test results of the examples show that the density of the refractory material obtained by the method provided by the invention is 1.752~2.359g / cm 3 , moderate density; thermal conductivity is 0.46~1.03W / mK, low thermal conductivity; maximum service temperature is 1250~1300℃, high refractory temperature; compressive strength is 184.3~201.3MPa, high compressive strength, not easy to deform, realized Resource utilization of copper smelting slag.

Description

technical field [0001] The invention belongs to the technical field of resource utilization of solid waste, in particular to a method for preparing a refractory material using copper smelting slag as a raw material. Background technique [0002] Copper smelting slag is a major solid waste in the copper metallurgical industry. Due to the difference in copper grade and smelting process, its chemical composition may vary to a certain extent, but generally contains iron and silicon in the form of oxides. , aluminum, magnesium, calcium, copper, zinc and a small amount of harmful elements such as lead. In the past, copper smelting slag was generally used as abrasive descaling, building materials for road construction or stockpiling. Non-ferrous metallurgical enterprises dump copper smelting slag in the open air, which not only occupies a large amount of land resources, but also poses a serious threat to the environment. Due to the coexistence of copper, iron, lead, zinc and othe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66C04B33/138
CPCC04B35/66C04B33/138C04B2235/3206C04B2235/77C04B2235/9607Y02P40/60
Inventor 胡建杭高鹏文王华姚培福
Owner YUNNAN COPPER CO LTD