Method for preparing foam ceramic heat-insulation board by utilizing gold ore tailings

A technology of gold mine tailings and foam ceramics, which is applied in the field of building materials, can solve problems such as ecological environment impact, groundwater hazards, and environmental pollution, and achieve the effects of adjustable porosity, uniform pores, and simple preparation process

Inactive Publication Date: 2017-05-24
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The accumulation of a large number of tailings not only requires considerable capital investment, but also has a certain impact on the ecological environment, and also brings a series of problems
In addition, gold mine tailings seriously pollute the environment. For example, during the weathering process, some harmful gases escape from the tailings and pollute through the atmosphere; during the flood season, the tailings flow into farmland and rivers together with rainwater, causing damage to groundwater, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method for preparing foamed ceramic insulation boards using gold mine tailings, prepared from the following components in parts by weight: gold mine tailings 40wt%, china stone 5wt%, feldspar 20wt%, clay 10wt%, sandstone 15wt% , gangue 10wt%, plus Fe 2 o 3 1.5wt%, plus 0.3wt% SiC, plus 0.8wt% grinding aid. The raw materials are ball milled (300 mesh), dried and molded, and then fired at 1185°C for 20 minutes. The pore size of the obtained sample is uniform, and the thermal insulation coefficient is 0.057W / (m·K) under the temperature difference of 35°C on the hot plate and 15°C on the cold plate.

Embodiment 2

[0030] A method for preparing foamed ceramic insulation boards using gold ore tailings, prepared from the following components in parts by weight: gold ore tailings 40wt%, china stone 5wt%, feldspar 20wt%, clay 10wt%, sandstone 15 wt %, coal gangue 10 wt %, plus Fe 2 o 3 1.0wt%, plus 0.5wt% of SiC, plus 0.8wt% of grinding aid. The raw materials are ball milled (300 mesh), dried and shaped, and then fired at 1180°C for 15 minutes. The pore size of the obtained sample is uniform, and the thermal insulation coefficient is 0.063W / (m·K) under the temperature difference of 35°C on the hot plate and 15°C on the cold plate.

Embodiment 3

[0032] A method for preparing foamed ceramic insulation boards using gold mine tailings is prepared from the following components in parts by weight: 40 wt % of gold mine tailings, 8 wt % of china stone, 15 wt % of feldspar, 15 wt % of clay, Sandstone 12 wt %, coal gangue 10 wt %, Fe 2 o 3 0.5wt%, add SiC1.2wt%, add grinding aid 1.0wt%. The raw materials are ball milled (300 mesh), dried and molded, and then fired at 1190°C for 10 minutes. The pore size of the obtained sample is uniform, and the thermal insulation coefficient is 0.059W / (m·K) under the temperature difference of 35°C on the hot plate and 15°C on the cold plate.

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PUM

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Abstract

The invention belongs to the field of building materials and discloses a method for preparing a foam ceramic heat-insulation board by utilizing gold ore tailings. The foam ceramic heat-insulation board is characterized by being prepared from the following components in parts by weight: 25 weight percent to 70 weight percent of the gold ore tailings, 0 to 15 weight percent of pottery stone, 5 weight percent to 20 weight percent of feldspar, 0 to 25 weight percent of clay, 0 to 15 weight percent of sandstone, 5 weight percent to 10 weight percent of coal gangue, 0.3 weight percent to 1.5 weight percent of additional SiC, 0.5 weight percent to 2.0 weight percent of additional Fe2O3 and 0.5 weight percent to 1.5 weight of an additional grinding aid. The method takes the gold ore tailings as a main raw material and takes the SiC, the coal gangue and the Fe2O3 as a compound foaming agent; the prepared foam ceramic heat-insulation board has a uniform and controllable pore diameter and low cost and a process is simple.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a method for preparing a foam ceramic insulation board by using gold mine tailings. Background technique [0002] With the rapid development of gold extraction technology in my country, the number, scale and output of gold mines are also increasing day by day. The accumulation of a large number of tailings not only requires considerable capital investment, but also has a certain impact on the ecological environment and also brings a series of problems. In addition, gold mine tailings seriously pollute the environment. For example, during the weathering process, some harmful gases escape from the tailings and pollute through the atmosphere. [0003] Foam ceramics is a high-porosity ceramic material made of shale, clay, feldspar, etc. as the main raw materials, plus a certain foaming agent, and baked at high temperature. It has light weight, low thermal conductivity, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/02C04B33/132
CPCC04B33/132C04B38/02C04B2235/3272C04B2235/3418C04B2235/3463C04B2235/3826Y02P40/60
Inventor 孙杰璟刘永杰孙旋
Owner UNIV OF JINAN
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