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Method for manufacturing low-swelling microcrystalline glass through microwave heat treatment of gold tailings

A technology of microwave heat treatment and glass-ceramics, which is applied in the field of producing low-expansion glass-ceramics by using microwave heat-treatment of gold tailings, can solve the problems of high cost of glass-ceramics, high glass melting temperature, and long crystallization time, etc. The effect of product quality control, energy saving, and grain refinement

Active Publication Date: 2013-05-08
INNER MONGOLIA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the defects of high cost, high glass melting temperature and long crystallization time of glass-ceramics in the prior art, and provide a cost-effective A method for producing low-expansion glass-ceramics with microwave heat treatment of gold tailings with low energy consumption, simple process and good product performance

Method used

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  • Method for manufacturing low-swelling microcrystalline glass through microwave heat treatment of gold tailings
  • Method for manufacturing low-swelling microcrystalline glass through microwave heat treatment of gold tailings
  • Method for manufacturing low-swelling microcrystalline glass through microwave heat treatment of gold tailings

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Embodiment 1

[0023] Embodiment 1: The method for producing low-expansion glass-ceramic by microwave heat treatment of gold tailings comprises the following steps:

[0024] 1) Accurately weigh 44kg of gold tailings, 23kg of quartz, 15kg of alumina, 9kg of lithium carbonate, 2.5kg of magnesium oxide, 3kg of titanium oxide, 0.5kg of zirconia, and 3kg of borax, and add the above raw materials into the mixer and mix evenly. Obtain batch material; The particle diameter of above-mentioned raw material is all less than 0.088mm;

[0025] 2) Put the batch material in an alumina crucible, and then put the crucible into an industrial microwave oven. The batch material is heated and melted by microwave to obtain molten glass. When melting, the temperature is raised to 1350 °C at a heating rate of 10 °C per minute, and at this temperature Keep warm for 25 minutes;

[0026] 3) The molten glass is molded by casting, and then placed in an industrial microwave oven with a power of 60KW for annealing treatm...

Embodiment 2

[0029] Embodiment 2: The method for producing low-expansion glass-ceramics by microwave heat treatment of gold tailings comprises the following steps:

[0030] 1) Accurately weigh 46kg of gold tailings, 23kg of quartz, 14kg of alumina, 10kg of lithium carbonate, 2kg of magnesium oxide, 3kg of titanium oxide, 1kg of zirconia, and 1kg of borax. Material; The particle diameter of above-mentioned raw material is all less than 0.088mm;

[0031] 2) Put the batch material in an alumina crucible, then put the crucible into a microwave oven, and melt the batch material through microwave heat treatment to obtain molten glass; when melting, the temperature is raised to 1450 °C at a rate of 10 °C per minute, and kept for 20 minutes;

[0032] 3) Cast the molten glass into shape, then place it in a 40KW industrial microwave oven, and undergo microwave annealing treatment at a temperature of 620°C and a holding time of 35 minutes;

[0033] 4) Continue microwave heating to raise the temperat...

Embodiment 3

[0035] Embodiment 3: The method for producing low-expansion glass-ceramic by microwave heat treatment of gold tailings comprises the following steps:

[0036] 1) Accurately weigh 40kg of gold tailings, 25kg of quartz, 16kg of alumina, 11kg of lithium carbonate, 2kg of magnesium oxide, 3kg of titanium oxide, 0.5kg of zirconia, and 2.5kg of borax, and add the above raw materials into the mixer and mix evenly. Obtain batch material; Above-mentioned raw material particle size is all less than 0.088m;

[0037] 2) Put the batch material in an alumina crucible and put the crucible into a microwave oven, and melt it through microwave heat treatment to obtain molten glass; when melting, the temperature is raised to 1400°C at a rate of 10°C per minute, and kept at this temperature for 30 minutes;

[0038] 3) Cast the molten glass into shape, then place it in a 30KW industrial microwave oven, and undergo microwave annealing treatment at a temperature of 600°C and a holding time of 25 min...

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Abstract

The invention relates to a method for manufacturing low-swelling microcrystalline glass through microwave heat treatment of gold tailings. The low-swelling microcrystalline glass comprises the following raw materials in percentage by weight: 40-50% of gold tailings, 20-25% of quartz, 13-18% of aluminum oxide, 5-13% of lithium carbonate, 2-4% of magnesium oxide, 2-4% of titanium oxide, 0.5-1% of zirconium oxide and 1-3% of borax. The method comprises the following steps: evenly mixing the raw materials, placing into an aluminum oxide crucible, and melting by microwave heating, thus obtaining glass metal; and transferring the molded glass metal into an industrial microwave oven, annealing, and performing crystallization treatment to obtain the product. According to the invention, the mining waste gold tailings are used as the main raw material, and the waste is changed into a valuable substance, thereby realizing the comprehensive utilization of the waste; a one-step heat treatment process is adopted, and the production cycle is shortened; the industrial microwave oven is used for heating in the melting, annealing and crystallization processes, thereby ensuring high heating speed and no pollution; for the obtained sample, grains are refined, the structure is uniform, and energy is saved; and the obtained microcrystalline glass is low in heat expansion coefficient and high in heat stability.

Description

[0001] technical field [0002] The invention relates to a method for manufacturing glass-ceramics, in particular to a method for producing low-expansion glass-ceramics by using microwave heat treatment of gold tailings. Background technique [0003] According to statistics, during the gold ore mining process, the discharge of gold mine tailings accounts for more than 90% of the selected ore, which is a huge amount. Depending on the type of deposit and surrounding rock conditions, tailings have their own characteristics in terms of component types and contents, but basically they are composite mineral raw materials mainly composed of aluminosilicate minerals, and their mineral components are usually quartz, long Stone, mica, carbonate, clay, hornblende, garnet, wollastonite, chlorite and residual metal minerals, its composition and process performance are suitable for industrial use, can be used as new building materials, Chemicals, light industrial ceramics and some new ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/00
Inventor 张雪峰李保卫贾晓林邓磊波
Owner INNER MONGOLIA UNIV OF SCI & TECH
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