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A production method for producing autoclaved lime-sand bricks from copper tailings

An autoclaved lime-sand brick and production method technology, applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problems of high utilization cost and inappropriateness, and achieve large production capacity and high work efficiency , ingeniously designed effects

Active Publication Date: 2017-03-22
SHANTOU XIJIA BUILDING MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the tailings treatment process, those skilled in the art are also trying different methods, such as burning cement, making glass ceramics, etc., but for copper tailings with relatively high moisture content and fine particles, these solutions are not suitable. Appropriate and costly to use

Method used

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  • A production method for producing autoclaved lime-sand bricks from copper tailings

Examples

Experimental program
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Effect test

Embodiment 1

[0014] Example 1 : A kind of production method of producing autoclaved lime-sand brick with copper tailings, according to mass percentage, described copper ore tailings sand content is 36%, carbide slag 10%, stone dust 20%, fine sand 34%, wherein carbide slag The effective calcium oxide content is ≥65%, the silica content of copper ore tailings is ≥35%, the moisture content of stone chips is ≤3%, and the moisture content of fine sand is ≤7%; the fineness and particle size of the copper ore tailings are as follows, The particle size ≤ 10 μm accounts for 100%, of which the particle size ≤ 2.0 μm accounts for 50%, and the moisture content is 18%. The particle size of the stone chips and fine sand is 0.10mm-3.0mm; the method is as follows, 1) Copper ore Tailings sand pretreatment: Spread the wet and agglomerated tailings sludge transported to the stockyard to dry, and collect them for later use when the moisture content drops below 17%. The tailings sand is transported to the ma...

Embodiment 2

[0015] Example 2 : A kind of production method of producing autoclaved lime-sand brick with copper tailings, according to mass percentage, described copper ore tailings sand content is 38%, carbide slag 11%, stone dust 18%, fine sand 33%, wherein calcium carbide slag The effective calcium oxide content is ≥65%, the silica content of copper ore tailings is ≥35%, the moisture content of stone chips is ≤3%, and the moisture content of fine sand is ≤7%; the fineness and particle size of the copper ore tailings are as follows, The particle size ≤ 10 μm accounts for 100%, of which the particle size ≤ 2.0 μm accounts for 50%, the water content is 18%-23%, and the particle size of the stone chips and fine sand is 0.10mm-3.0mm. The method is as follows: 1) Copper ore tailing sand pretreatment: spread out the wet and agglomerated tailing mud transported to the stockyard to dry, and collect it for later use when the moisture content drops below 17%; 2) Put stone chips and carbide slag ...

Embodiment 3

[0016] Example 3: A kind of production method of producing autoclaved lime-sand brick with copper tailings, according to mass percentage, described copper ore tailings sand content is 40%, carbide slag 12%, stone dust 16%, fine sand 32%, wherein carbide slag The effective calcium oxide content is ≥65%, the silica content of copper ore tailings is ≥35%, the moisture content of stone chips is ≤3%, and the moisture content of fine sand is ≤7%; the fineness and particle size of the copper ore tailings are as follows, The particle size ≤ 10 μm accounts for 100%, of which the particle size ≤ 2.0 μm accounts for 50%, the water content is 18%-23%, and the particle size of the stone chips and fine sand is 0.10mm-3.0mm. The method is as follows: 1) Copper ore tailing sand pretreatment: spread out the wet and agglomerated tailing mud transported to the stockyard to dry, and collect it for later use when the moisture content drops below 17%; 2) Put stone chips and carbide slag , fine sa...

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Abstract

The invention relates to a production method for producing autoclaved sand-lime bricks with copper tailings. The method is characterized in that the sand-lime bricks comprise, by mass, 35-45% of the copper tailings sand, 8-12% of calcium carbide slag, 15-20% of stone chips, and 30-35% of fine sand. An effective calcium oxide content of the calcium carbide slag is no lower than 65%. A silicon dioxide content of the copper tailings sand is no lower than 35%. The water content of the stone chips is no higher than 3%. The water content of the fine sand is no higher than 7%. According to the invention, the autoclaved sand-lime bricks are produced with the copper tailings with high water content, such that the copper tailings are fully utilized, and the produced autoclaved sand-lime bricks have high compressive strength and high flexural strength. With the method, enterprise cost is reduced, the environment is effectively protected, safety risk is eliminated, and an effective promotion is provided for the development of the metallurgical industry.

Description

technical field [0001] The invention relates to a production method of lime-sand bricks, in particular to a production method of using copper tailing waste slag and calcium carbide slag (dehydrated calcium carbide mud) instead of quartz sand and quicklime to produce autoclaved lime-sand bricks. Background technique [0002] Copper tailings, also known as copper tailings, are composed of fine powder sand left after the ore has been crushed and selected. Except for a small amount of coarse particles used as underground filling materials for mines, most of these tailings are also used as It is stored by filling depressions or damming stacks. The stacked copper tailings not only occupy a large amount of land, but also cover the original vegetation, and the ecosystem is destroyed. Due to the special physical and chemical properties of the tailings, the content of heavy metals is particularly high. It is difficult for plants to grow naturally on the tailings. At the same time, the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B30/00C04B18/04C04B18/12C04B14/06
CPCY02W30/91
Inventor 郑灿荣
Owner SHANTOU XIJIA BUILDING MATERIALS
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