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 environm

Method used

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Examples

Experimental program
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Effect test

Example Embodiment

[0016] In Example 1, the waste copper tailings were crushed and put into a ball mill tank and ball milled to below 300 mesh; the waste glass was washed clean, and ball milled to below 300 mesh after drying; 57% of the copper tailings, 35% by mass fraction The waste glass, 0.4% carbon black, 2.6% sodium fluorosilicate, and 5% sodium phosphate are put into a ball mill tank and ball milled to below 200 mesh; the sodium fluorosilicate and sodium phosphate are used as additives. In order to effectively reduce the foaming temperature of the foamed glass, improve the performance of the foamed glass, increase the closed-cell structure, in addition, it can also enhance the low-temperature viscosity of the glass melt, enhance the toughness, and stabilize the foam. Then add the above ball milled batch to the heat-resistant steel mold, and then move the mold into the foaming furnace to heat; from room temperature at a temperature rise rate of 10°C / min to 400°C, keep it for 20 minutes, and the...

Example Embodiment

[0017] In Example 2, the waste copper tailings were crushed and put into a ball mill tank to be ball milled to below 300 mesh; the waste glass was cleaned, and ball milled to below 300 mesh after drying; 51% copper tailings, 42% by mass fraction The waste glass, 0.5% carbon black, 5% sodium fluorosilicate, 1.5% sodium phosphate are put into the ball mill tank and ball milled to below 200 mesh; the above ball milled batch is added to the heat-resistant steel mold, and then Move the mold into the foaming furnace and heat it; from room temperature to 400°C at a heating rate of 11°C / min, hold for 23min; then at a heating rate of 18°C / min to 900°C, hold for 40min; rapid cooling stage, cooling The speed is 20°C / min, cooling to 550°C, and the constant temperature is 40min; in the annealing stage, the temperature cooling speed is 1.5°C / min, and the foam glass is obtained by annealing to below 50°C. The formed foam glass has a uniform structure and a density of 0.7g·cm -3 , The water absor...

Example Embodiment

[0018] In Example 3, the waste copper tailings were crushed and put into a ball mill tank to be ball milled to below 300 mesh; the waste glass was washed clean, and ball milled to below 300 mesh after drying; 50% copper tailings, 45% by mass fraction The waste glass, 0.2% carbon black, 2.5% sodium fluorosilicate, 2.3% sodium phosphate are put into a ball milling tank and ball milled to below 200 mesh; the above ball milled batch is added to a heat-resistant steel mold, and then Move the mold into the foaming furnace and heat; rise from room temperature to 400°C at a heating rate of 12°C / min and hold for 26 minutes; then rise to 880°C at a heating rate of 15°C / min and hold for 52 minutes; rapid cooling stage, cooling rate It is 18℃ / min, cooled to 540℃, and kept constant for 50min; in the annealing stage, the cooling rate is 2℃ / min, and the foam glass is obtained by annealing to below 50℃. The formed foam glass has a uniform structure and a density of 0.7g·cm -3 , The water absorpti...

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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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