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Method for preparing cristobalite-mullite composite refractory

A refractory material and mullite technology, applied in the field of refractory materials, can solve the problems of high production cost, unfavorable popularization and application, and large initial investment of cristobalite-mullite composite materials, so as to promote sustainable development and increase processing capacity , the effect of improving the environment

Inactive Publication Date: 2011-11-02
河南省冶金研究所有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This preparation method needs to add a certain amount of bauxite to coal gangue, resulting in higher production costs of cristobalite-mullite composite materials; Quartz-mullite composite materials require a large initial investment, which is not conducive to popularization and application

Method used

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  • Method for preparing cristobalite-mullite composite refractory
  • Method for preparing cristobalite-mullite composite refractory
  • Method for preparing cristobalite-mullite composite refractory

Examples

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Effect test

Embodiment 1

[0022] The preparation method of cristobalite-mullite composite refractory material, the specific steps are as follows: use coal gangue as raw material, and use Hefei Kejing KSL-1700X-A1 high-temperature furnace to calcinate at 1000°C for 3 hours to obtain cristobalite-mullite Composite refractories.

Embodiment 2

[0024] The preparation method of cristobalite-mullite composite refractory material, the specific steps are as follows: use coal gangue as raw material, and use Hefei Kejing KSL-1700X-A1 high-temperature furnace to calcinate at 1300°C for 3 hours to obtain cristobalite-mullite Composite refractories.

[0025] The cristobalite-mullite composite refractory materials prepared in Examples 1 and 2 were prepared into powders with a particle size of 200 mesh by Raymond mill, and then they could be used directly.

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Abstract

The invention discloses a method for preparing a cristobalite-mullite composite refractory. The method disclosed by the invention comprises the following concrete steps: using coal gangue as a raw material; and calcining for 3 hours at 1000-1300 DEG C to prepare the cristobalite-mullite composite refractory. The preparation method disclosed by the invention is simple, does not need to add any additive to the coal gangue and does not need to carry out any preprocessing on the coal gangue. The production cost of the cristobalite-mullite composite refractory prepared by the preparation method disclosed by the invention is greatly lowered, and the profit margin of the cristobalite-mullite composite refractory is relatively enlarged. The preparation method disclosed by the invention is simple and the investment which is needed in early days is small, thus the preparation method is suitable for popularization and application, can obviously enhance the processing quantity of the coal gangue, obviously improves the environment at the periphery of mining areas and reduces occupation, thereby promoting the sustainable development of the mining areas.

Description

technical field [0001] The invention relates to the technical field of refractory materials, in particular to a method for preparing a cristobalite-mullite composite refractory material. Background technique [0002] Coal gangue is a kind of black rock associated with coal in the process of coal formation. It is a solid waste produced in the process of coal mining. It is also one of the industrial solid wastes with the largest annual discharge and cumulative stockpiling in my country. Since coal gangue contains combustible substances such as residual coal, carbonaceous mudstone, and wood fragments, spontaneous combustion may occur after long-term accumulation in the open air, and a large amount of CO, CO 2 , SO 2 Such gases will bring certain harm to the surrounding environment. However, from the perspective of the composition of coal gangue, coal gangue has the properties of coal, rock and chemical raw materials, and is also a usable resource. If it can be used comprehen...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 陈红举吴永辉宫德龙卢中强胡永成陈西杨永青段理杰郝大伟党照亮魏未张光红
Owner 河南省冶金研究所有限责任公司
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