Hydrocyclone wear-resistant ceramic liner and preparation method thereof

A technology of wear-resistant ceramics and cyclones, applied in the field of cyclone liners, can solve the problems of affecting application potential, high brittleness, poor toughness, etc., and achieve the effects of reducing production costs, reducing porosity, and long service life

Active Publication Date: 2014-07-16
天地科技股份有限公司唐山分公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the field of mining, due to the bonding characteristics of its molecular structure, there are fatal weaknesses such as difficult processing, poor toughness, and high brittleness, which seriously affects its application p

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0013] Embodiment 1: The wear-resistant ceramic lining plate of the cyclone is prepared by using the following raw materials and its process steps.

[0014] Raw material ratio: silicon carbide powder 75.8wt%, alumina powder 2.5wt%, yttrium oxide powder 4.1wt%, carbon fiber 17.6wt%.

[0015] Process steps: put silicon carbide powder, alumina powder and yttrium oxide powder into a wet alumina ball mill, add water and mix for 10 hours to form a uniformly mixed slurry. Pour the slurry into the granulation tower for granulation. The temperature of the hot air in the granulation tower is 230°C; the mixed particles formed by granulation are mixed with carbon fiber, and mixed in a mechanical mixer for 2 hours; then put into a sealed barrel for aging 14h, the formation of stale material. The stale material is put into the alloy mold and pressed into shape, and the forming pressure is controlled at 900kg / cm 2 ;The pressed green body is put into a vacuum kiln for sintering, and the vac...

Example Embodiment

[0016] Embodiment 2: The wear-resistant ceramic lining plate of the cyclone is prepared by using the following raw materials and its process steps.

[0017] Raw material ratio: silicon carbide powder 79.4wt%, yttrium oxide powder 3.6wt%, alumina powder 2.7wt%, carbon fiber 14.3wt%.

[0018] Process steps: put silicon carbide powder, alumina powder and yttrium oxide powder into a wet alumina ball mill, add water and mix for 14 hours to form a uniformly mixed slurry. Pour the slurry into the granulation tower for granulation. The temperature of the hot air in the granulation tower is 220°C; the mixed particles formed by granulation are mixed with carbon fiber, and mixed in a mechanical mixer for 3 hours; then put them into a sealed barrel for aging 24h, the formation of stale material. The stale material is put into the alloy mold and pressed into shape, and the forming pressure is controlled at 600kg / cm 2 ;The pressed green body is put into a vacuum kiln for sintering, and th...

Example Embodiment

[0019] Embodiment 3: The wear-resistant ceramic lining plate of the cyclone is prepared by using the following raw materials and process steps.

[0020] Raw material ratio: silicon carbide powder 65.2wt%, yttrium oxide powder 7.9wt%, alumina powder 7.6wt%, carbon fiber 19.3wt%.

[0021] Process steps: put silicon carbide powder, alumina powder and yttrium oxide powder into a wet alumina ball mill, add water and mix for 12 hours to form a uniformly mixed slurry. Pour the slurry into the granulation tower for granulation. The temperature of the hot air in the granulation tower is 260°C; the mixed particles formed by granulation are mixed with carbon fiber, and mixed in a mechanical mixer for 1 hour; then put them into a sealed barrel for aging 36h, the formation of stale material. The stale material is put into an alloy mold and pressed into shape, and the forming pressure is controlled at 1200kg / cm 2 ;The compacted green body is put into a vacuum kiln for sintering, and the v...

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PUM

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Abstract

The invention discloses a hydrocyclone wear-resistant ceramic liner and a preparation method thereof. The hydrocyclone wear-resistant ceramic liner is prepared from the following active ingredients in percentage by weight: 2%-8% of yttrium oxide, 2%-10% of aluminum oxide, 14%-20% of carbon fiber, and 65%-80% of silicon carbide. The ceramic liner adopts the technology of rare earth materials of aluminum oxide, yttrium oxide and the like, the low-temperature yttroalumite formed in the sintering process is beneficial to compactness of a silicon carbide liner, and the porosity of the product is reduced; simultaneously taking the large crispness characteristic of the silicon carbide, carbon fibers are added into active ingredients, so that the phenomena of deviating crack propagation, pulling out the fibers and the like can occur under the presence of the carbon fibers, and further the breakage tenacity of the product can be enhanced. The ceramic liner has the characteristics of being low in porosity, good in wear resistance and tenacity, and easy to produce, the service life of a heavy medium hydrocyclone applying the ceramic liner can be prolonged by more than one year which is far longer than three to five months of the conventional corundum liner, so that the service life of the heavy medium hydrocyclone is greatly prolonged; and the hydrocyclone wear-resistant ceramic liner can be widely applied in the field of mining industry and the like having higher requirement on wear resistance.

Description

technical field [0001] The invention relates to a cyclone liner, in particular to a wear-resistant ceramic liner of a dense medium cyclone and a preparation method thereof. Background technique [0002] As the core component of the heavy medium cyclone, the wear-resistant liner is pasted on the inner wall of the heavy medium cyclone with wear-resistant adhesive. When the cyclone is working, the mixture of raw coal, heavy medium and water will cause friction and wear with the inner wall. When the lining is worn to a certain extent or broken, the wear-resistant lining will fail, resulting in failure of the accessory. In severe cases, the whole machine needs to be replaced. In the prior art, the wear-resistant lining boards often used in dense medium cyclones are corundum, cast iron and polyurethane. Polyurethane is used in heavy medium cyclones with a diameter of Φ500mm or more, which will cause serious scratches; cast iron is used in diameters of Φ1000mm or more. The dense m...

Claims

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Application Information

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IPC IPC(8): C04B35/80C04B35/565C04B35/622
Inventor 王淑军周彪张力强黄勇吕秀丽程会朝刘金龙
Owner 天地科技股份有限公司唐山分公司
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