High-strength ceramic mainly prepared from tungsten tailings and preparation method of high-strength ceramic

A main raw material, tungsten tailings technology, applied in the field of building materials, high-strength ceramics and its preparation, can solve the problems of lack of ceramic raw materials, low utilization rate of tungsten tailings, etc., and achieve high yield, high strength and chemical stability , the effect of fewer types of raw materials

Inactive Publication Date: 2015-04-08
CENT SOUTH UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0007] Aiming at the practical problems of low utilization rate of tungsten tailings and increasingly scarce ceramic raw materials, the present invention fully considers the SiO2 in tungsten tailings 2 、Al 2 o 3 The characteristics of high oxide content provide a high-strength ceramic (ceramic plate or ceramic brick) with tungsten tailings as the main raw material and its preparation method

Method used

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  • High-strength ceramic mainly prepared from tungsten tailings and preparation method of high-strength ceramic
  • High-strength ceramic mainly prepared from tungsten tailings and preparation method of high-strength ceramic

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Embodiment 1

[0029] A high-strength ceramic with tungsten tailings as the main raw material and a preparation method thereof. In terms of weight percentage, the tungsten tailings are 90%, albite 10%, and polyvinyl alcohol binder accounting for 5% of the total amount of raw materials is added. Pretreat the tungsten tailings at 900°C for 2 hours; accurately weigh the pretreated tungsten tailings and feldspar, mix, ball mill, pass through a 200-mesh sieve, and add polyvinyl alcohol binder accounting for 5% of the total amount of raw materials , mixed evenly to make the batch material; put the batch material into a stainless steel mold, and press it with a pressure of 30MPa; put the pressed green body in the air and dry it naturally for 1 hour; put the dried green body into the sintering furnace Sintering, the firing temperature is 1050 ℃, heat preservation for 1 hour.

Embodiment 2

[0031] A high-strength ceramic with tungsten tailings as the main raw material and a preparation method thereof. In terms of weight percentage, the tungsten tailings are 85%, albite 15%, and a polyvinyl alcohol binder accounting for 1% of the total amount of raw materials is added. Pretreat the tungsten tailings at 600°C for 2 hours; accurately weigh the pretreated tungsten tailings and feldspar, mix, ball mill, pass through a 300-mesh sieve, and add polyvinyl alcohol binder accounting for 1% of the total amount of raw materials , mixed evenly to make a batch; put the batch into a stainless steel mold, and press it with a pressure of 20MPa; put the pressed green body in the air and dry it naturally for 3 hours; put the dried green body into a sintering furnace For sintering, the firing temperature is 1050°C and kept at high temperature for 2 hours.

Embodiment 3

[0033] A high-strength ceramic with tungsten tailings as the main raw material and a preparation method thereof. In terms of weight percentage, tungsten tailings are 80%, albite feldspar 20%, and polyvinyl alcohol binder accounting for 3% of the total raw materials. Pretreat the tungsten tailings at 900°C for 1 hour; accurately weigh the pretreated tungsten tailings and feldspar, mix, ball mill, pass through a 200-mesh sieve, and add polyvinyl alcohol binder accounting for 3% of the total amount of raw materials , mixed evenly to make a batch; put the batch into a stainless steel mold, and press it with a pressure of 25MPa; put the pressed green body in the air and dry it naturally for 2 hours; put the dried green body into a sintering furnace Sintering, the firing temperature is 1050°C, and the temperature is kept at high temperature for 3 hours.

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Abstract

The invention provides high-strength ceramic mainly prepared from tungsten tailings and a preparation method of the high-strength ceramic. The high-strength ceramic comprises the following raw materials in percentage by mass: 80%-90% of tungsten tailings, 10%-20% of albite and 1%-5% of a binder. The preparation method comprises the following steps: firstly preprocessing the tungsten tailings, mixing the preprocessed tungsten tailings with albite, carrying out ball milling, and carrying out compression molding by virtue of a stainless steel mold; sintering after drying, so as to obtain the high-strength ceramic. The high-strength ceramic has the coefficients that the volume density is 2.42g / cm<3>-2.47g / cm<3>, the water absorption rate is 0.018%-0.089%, the bending strength is 78MPa-105MPa, and the compressive strength is 170MPa-252MPa. The preparation method has the beneficial effects that the utilization rate of the tungsten tailings is high (the mass percent is 80%-90%); by combining the tungsten tailings with a traditional raw material, namely albite, the sintering temperature is substantially decreased; the preparation process is simple, and the production cost is relatively low; the preparation method is suitable for large-scale production, and the environmental pollution caused by the tungsten tailings can be effectively reduced.

Description

technical field [0001] The invention designs a high-strength ceramic with tungsten tailings as the main raw material and a preparation method thereof, belonging to the fields of building material technology and solid waste utilization. Background technique [0002] my country is a resource-rich country with abundant tungsten ore resources. The main forms of tungsten ore in nature are wolframite and scheelite. Their reserves and output rank first in the world. Tungsten resource reserves account for 62.1% of the world, while output accounts for The world's output is 90.9%. [0003] Tungsten tailings are solid wastes discharged after selecting tungsten-containing minerals in tungsten ore. The grade of tungsten resources in our country is very low, and there are very few rich ores, and the grade of tungsten (WO 3 ) greater than 0.5% accounted for only 20%, resulting in a large amount of tungsten tailings produced in the beneficiation process. my country discharges more than 40...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/14C04B35/622B09B3/00
Inventor 卢安贤吴婷刘涛涌李秀英罗志伟胡晓林刘飘宋俊张骞
Owner CENT SOUTH UNIV
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