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Composite refractory material and preparation method thereof

A technology for refractory materials and raw materials, applied in the field of refractory materials, can solve problems such as waste, and achieve the effects of simple manufacturing process, full utilization of resources, and simple and easy process

Inactive Publication Date: 2014-09-17
XINJIANG JOINWORLD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the production process, it is necessary to regularly throw away the mixture of filtered product aluminum powder particles and oil stains, resulting in great waste

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] This embodiment provides a method for preparing a composite refractory material, comprising the following steps:

[0028] (1) First, filter the industrial waste rolling oil in the aluminum foil hot rolling production process to obtain aluminum powder, then perform conventional centrifugal treatment to remove a large amount of oil, then put it into a high-temperature annealing furnace, and calcinate at 600 ° C for 2 hours to volatilize the aluminum Rolling oil between powders. After natural cooling, the dried aluminum powder is put into a ball mill, and the particle size range of the aluminum powder obtained by vacuum ball milling under a nitrogen protective atmosphere is 1-5 μm. Through this step, the aluminum powder in the rolling oil in the aluminum foil hot rolling production process is recovered again.

[0029] Scraps from the crystalline silicon cutting process comprising 72 wt% of silicon carbide and 23 wt% of silicon are selected, wherein the particle size of si...

Embodiment 2

[0034] This embodiment provides a method for preparing a composite refractory material, comprising the following steps:

[0035] (1) Pretreat the waste in the crystalline silicon cutting process: add an acid that does not react with the silicon and the silicon carbide, such as sulfuric acid, hydrochloric acid, carbonic acid, into the waste in the crystalline silicon cutting process All can be filtered and washed with water. Through this step, metal impurities and oxide impurities in waste materials in the crystalline silicon cutting process can be removed.

[0036] (2) First, filter the industrial waste rolling oil in the aluminum foil hot rolling production process to obtain aluminum powder, then perform conventional centrifugal treatment to remove a large amount of oil, then put it into a high-temperature annealing furnace, and calcined at 570 ° C for 2 hours to volatilize the aluminum Rolling oil between powders. After natural cooling, the dried aluminum powder is put int...

Embodiment 3

[0040] This embodiment provides a method for preparing a composite refractory material, comprising the following steps:

[0041] (1) First, filter the industrial waste rolling oil in the aluminum foil hot rolling production process to obtain aluminum powder, then perform conventional centrifugal treatment to remove a large amount of oil, then put it into a high-temperature annealing furnace, and calcinate at 600 ° C for 2.5 hours to volatilize the aluminum Rolling oil between powders. After natural cooling, the dried aluminum powder is put into a ball mill, and the particle size range of the aluminum powder obtained by vacuum ball milling under a nitrogen protective atmosphere is 1-5 μm. Through this step, the aluminum powder in the rolling oil in the aluminum foil hot rolling production process is recovered again.

[0042] Scraps from the crystalline silicon cutting process comprising 80 wt% of silicon carbide and 15 wt% of silicon are selected, wherein the particle size of ...

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Abstract

The invention discloses a composite refractory material and a preparation method thereof. The method comprises the following steps: (1) pressing raw materials including aluminum and waste in a crystalline silicon cutting process into a green body, wherein the waste in the crystalline silicon cutting process includes silicon carbide and silicon, and aluminum is extracted from an industrial waste rolling oil in an aluminum foil hot rolling production process; and (2) carrying out nitridation sintering on the green body, to obtain the composite refractory material, wherein the composite refractory material includes a silicon carbide phase, a silicon nitride phase and an aluminum nitride phase, and the silicon carbide phase, the silicon nitride phase and the aluminum nitride phase are mutually combined. The raw materials of aluminum, silicon carbide and silicon used in the method all come from the industrial waste, effective utilization of secondary resources is achieved, and pollutions to the environment are reduced. In the crystalline silicon cutting technology, the particle sizes of silicon carbide and silicon in the obtained waste are both allowed to be smaller along with cutting an abrasive material, so that the raw materials can be fully contacted with each other, the uniformity of the prepared composite refractory material is good, and the performance of the composite refractory material is improved.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, relates to the comprehensive utilization of secondary resources, and specifically relates to a composite refractory material and a preparation method thereof. Background technique [0002] In the context of the depletion of traditional energy sources, developed countries in the world have formulated policies to encourage the development of the solar energy industry. The solar energy industry has entered a period of rapid development, and has grown at an annual growth rate of 40% to 50% in recent years. As one of the photoelectric conversion devices of solar cells, crystalline silicon wafers are obtained by multi-wire cutting crystalline silicon rod technology. The mainstream process uses water-based cutting fluid composed of polyethylene glycol and silicon carbide powder for slicing production. The particle size range of silicon carbide is 1-12μm. During the slice production process...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/581C04B35/565C04B35/622
Inventor 郭菁滕莹雪高艳丽
Owner XINJIANG JOINWORLD CO LTD