Method for producing foam glass from silver tailings
A technology of foam glass and silver tailings, which is applied in the field of foam glass production from silver tailings, can solve the problems of low product quality and added value, and achieve the effects of good flexural strength, high compressive strength and low thermal conductivity
Inactive Publication Date: 2017-12-29
崔曜鹏
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However, the product quality and added value obtained by this method are not high
Method used
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[0049] Silver tailings are used as the main raw material for batching. The composition of the glass frit obtained after batching is shown in Table 1:
[0050] Table 1 Glass frit formula provided by the embodiment of the present invention
[0051]
[0052] After the glass frit is obtained, it is heated to 1450° C. and melted for 7 hours, the obtained glass melt is placed in cold water for water quenching, and after grinding, it is passed through a 200-400 mesh sieve to obtain a foam glass raw material.
[0053] The foam glass raw material is mixed with 0.3 wt% calcium carbonate passing through a 300-800 mesh sieve, ball milled for 7 hours, and heated to 860° C. at a rate of 5° C. / min for sintering for 2 hours. Then it was kept at 560°C for 30h, cooled to room temperature at a rate of 5°C / min, cut and polished to obtain foam glass.
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Abstract
The invention provides a method for producing foam glass from silver tailings. The method includes proportioning the silver tailings to obtain frit with certain composition; melting the frit and carrying out water quenching on the frit to obtain foam glass raw materials; mixing glass clinker and foaming agents with one another to obtain mixtures and sintering and annealing the mixtures to obtain the foam glass. The method has the advantages that the foam glass prepared by the aid of the method is high in breaking strength and excellent in performance and has a low heat conductivity coefficient; as shown by test results, the density of the foam glass prepared by the aid of the method is 98-140 kg / m<3>, the normal-temperature heat conductivity coefficient of the foam glass is 0.036-0.045 w / (K.m), the breaking strength of the foam glass is 0.5-3 MPa, and the pore diameters of the foam glass are 0.1-4 mm; the foam glass prepared by the aid of the method is good in compressive strength, has the low heat conductivity coefficient and can be used as a wall heat-insulation material and an industrial cryogenic heat-insulation material.
Description
Technical field [0001] The invention belongs to the technical field of the reuse of silver tailings, and in particular relates to a method for producing foam glass using silver tailings. Background technique [0002] With the rapid development of my country's industrialization, the demand for mineral resources has increased sharply. In the process of over-exploitation, a large amount of solid waste is inevitably produced. The waste of mineral resources in our country is serious. Today, when mineral resources are declining and environmental protection calls are increasing, the secondary utilization of tailings has been valued by countries all over the world. [0003] Silver tailings are slag from silver ore extracted from silver. The prior art has disclosed a variety of secondary uses. For example, Chinese Patent 106145765A discloses an artificial antibacterial decorative stone using silver tailings as raw materials. However, the product quality and added value obtained by this met...
Claims
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IPC IPC(8): C03C11/00C03C6/10
Inventor 崔曜鹏
Owner 崔曜鹏