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Method for producing foamed glass by using copper tailings

A technology of foam glass and copper tailings, which is applied in the field of foam glass manufacturing, can solve the problems of environmental pollution and waste of resources, and achieve the effects of low thermal conductivity, low water absorption, and reduced production costs

Inactive Publication Date: 2008-05-21
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It pollutes the environment and wastes resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1, after crushing the waste copper tailings, put them into a ball mill tank and grind them to below 300 mesh; clean the waste glass, dry them and ball mill them to below 300 mesh; mix 57% copper tailings, 35% 0.4% of waste glass, 0.4% of carbon black, 2.6% of sodium fluorosilicate, and 5% of sodium phosphate are put into a ball mill jar and ball-milled to below 200 mesh; the sodium fluorosilicate and sodium phosphate used are used as additives, and their effect is In order to effectively reduce the foaming temperature of the foam glass, improve the performance of the foam glass, increase the closed-cell structure, and also enhance the low-temperature viscosity of the glass melt, enhance the toughness, and play a role in stabilizing the foam. Then add the above-mentioned ball-milled batch materials into the heat-resistant steel mold, and then move the mold into the foaming furnace for heating; from room temperature to 400°C at a rate of 10°C / min, keep it warm for ...

Embodiment 2

[0017] Example 2, after crushing the waste copper tailings, put them into a ball mill tank and grind them to below 300 mesh; clean the waste glass, dry them and ball mill them to below 300 mesh; mix 51% copper tailings, 42% 0.5% of waste glass, 0.5% of carbon black, 5% of sodium fluorosilicate, and 1.5% of sodium phosphate are put into a ball mill jar and ball-milled to below 200 mesh; Move the mold into the foaming furnace for heating; from room temperature to 400°C at a rate of 11°C / min, and keep it warm for 23 minutes; The speed is 20°C / min, cooled to 550°C, and kept at a constant temperature for 40 minutes; in the annealing stage, the cooling rate is 1.5°C / min, and annealed to below 50°C to obtain foam glass. The formed foam glass has a uniform structure and a density of 0.7g cm -3 , the water absorption rate is 1.0vol%, the average cell diameter is 1.4mm, and the flexural strength reaches 1.7MPa.

Embodiment 3

[0018] Example 3, after crushing the waste copper tailings, put them into a ball mill tank and grind them to below 300 mesh; clean the waste glass, dry them and ball mill them to below 300 mesh; mix 50% copper tailings, 45% The waste glass of 0.2%, the carbon black of 0.2%, the sodium fluorosilicate of 2.5%, the sodium phosphate of 2.3% are put into the ball mill jar and ball-milled to below 200 mesh; Move the mold into a foaming furnace to heat; from room temperature to 400°C at a rate of 12°C / min, and keep it warm for 26 minutes; 18°C / min, cooled to 540°C, and kept at a constant temperature for 50 minutes; in the annealing stage, the cooling rate was 2°C / min, and annealed to below 50°C to obtain foam glass. The formed foam glass has a uniform structure and a density of 0.7g cm -3 , the water absorption rate is 0.8vol%, the average cell diameter is 1.5mm, and the flexural strength reaches 2.0MPa.

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Abstract

The invention provides a method of producing foam glass with copper tailings. The copper tailings, waste glass, coal black, sodium fluosilicate and sodium phosphate are added in a heat-resistant steel die after being put in a ball milling tank to be milled into 200 orders below. Then, the die is moved into a foaming furnace to obtain foam glass through the preheating, the foaming, the foam stabilizing and the annealing. The invention uses industrial waste copper tailings as raw materials to prepare the foam glass, added with a little additive. The invention is beneficial to the waste utilization and the environment protection. And the obtained foam glass has the advantages of structure with high strength, low water absorption rate, small density and low thermal conductivity. The invention can effectively lower the production cost of the foam glass, protect the environment and change wastes into valuables. The properties of the produced foam glass are that the density is smaller than 0.8g / cm<3>, the water absorption rate is smaller than 1.5vol percent, the average foam diameter is 1-3mm, and the flexural strength can reach to 2.0MPa.

Description

technical field [0001] The invention relates to a method for manufacturing foam glass, in particular to a method for producing foam glass by using copper tailings. Background technique [0002] Copper tailings are a kind of solid mineral waste discharged by copper mine production enterprises after selecting useful components. At present, there is no scientific and reasonable method for fully recovering and utilizing copper tailings, and most of them are treated as road paving and deep burial. There are many copper mining enterprises in China, and if the tailings produced every year are not handled properly, they will cause great pollution to the environment. It pollutes the environment and wastes resources. Contents of the invention [0003] The object of the present invention is to provide a kind of method that can effectively reduce the production cost of foam glass, protect environment, utilize copper tailings to produce foam glass, and the foam glass obtained by the ...

Claims

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Application Information

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IPC IPC(8): C03C11/00
Inventor 郭宏伟王少龙高档妮高淑雅刘新年赵彦钊陈云建王键
Owner SHAANXI UNIV OF SCI & TECH
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