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Method for preparing refractory powder for casting coatings by using serpentine tailings and granite waste

A technology of granite waste and serpentine tailings, applied in the direction of manufacturing tools, casting molding equipment, coatings, etc., can solve the problems of waste of resources, environmental pollution, etc., achieve high refractoriness and strength, low thermal expansion coefficient and thermal conductivity, Excellent thermal shock resistance and chemical resistance effect

Inactive Publication Date: 2017-09-05
SILVER ANHUI FOUNDRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As people's demand for granite continues to increase, a large number of waste rocks, waste rock powder, and waste mud also follow, which not only causes serious pollution to the environment, but also is a waste of resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A method for preparing refractory powder for foundry coatings by utilizing serpentine tailings and granite waste, comprising the following steps:

[0019] (1) According to the mass ratio of 1.5:1, the chrysotile tailings and granite waste are mixed evenly, crushed to particles with a particle size of ≤0.5mm, and then calcined at 560°C for 3 hours, cooled to room temperature, and then heated at a speed of 5000r / min Ball milling until the particle size is 30 μm, the ball-to-material ratio is 4:1, and the ball mill A is obtained;

[0020] (2) Mix silicon micropowder and industrial alumina evenly according to the mass ratio of 1:1, ball mill at a speed of 6000r / min until the particle size is 20μm, and the ball-to-material ratio is 3:1, to obtain ball mill B;

[0021] (3) Mix ball abrasive A and ball abrasive B evenly according to the mass ratio of 1:2, then add the mixed ball abrasive into the water according to the solid-to-liquid ratio of 1:3, and then add Suzhou soil and...

Embodiment 2

[0025] A method for preparing refractory powder for foundry coatings by utilizing serpentine tailings and granite waste, comprising the following steps:

[0026] (1) According to the mass ratio of 2:1, mix the chrysotile tailings and granite waste evenly, crush them to particles with a particle size of ≤0.5mm, then calcinate at 600°C for 2.5h, cool to room temperature at a speed of 6000r / min Ball milling until the particle size is 25 μm, the ball-to-material ratio is 5:1, and the ball mill A is obtained;

[0027] (2) According to the mass ratio of 1.5:1, mix the silicon micropowder and industrial alumina evenly, and ball mill at the speed of 7000r / min until the particle size is 15μm, and the ball-to-material ratio is 4:1, and the ball mill B is obtained;

[0028] (3) Mix ball abrasive A and ball abrasive B evenly according to the mass ratio of 1:2.5, then add the mixed ball abrasive into the water according to the solid-to-liquid ratio of 1:3.5, and then add Suzhou soil and 7...

Embodiment 3

[0032] A method for preparing refractory powder for foundry coatings by utilizing serpentine tailings and granite waste, comprising the following steps:

[0033] (1) According to the mass ratio of 2.5:1, the chrysotile tailings and granite waste are mixed evenly, crushed to particles with a particle size of ≤0.5mm, and then calcined at 640°C for 2 hours, cooled to room temperature, and then heated at a speed of 7000r / min Ball milling until the particle size is 20 μm, the ball-to-material ratio is 6:1, and the ball mill A is obtained;

[0034] (2) Mix silicon micropowder and industrial alumina evenly according to the mass ratio of 2:1, and ball mill at a speed of 8000r / min until the particle size is 10 μm, and the ball-to-material ratio is 5:1, to obtain ball mill B;

[0035] (3) Mix ball abrasive A and ball abrasive B evenly according to the mass ratio of 1:3, then add the mixed ball abrasive into the water according to the solid-to-liquid ratio of 1:4, and then add Suzhou soi...

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Abstract

The invention discloses a method for preparing refractory powder for casting coatings by using serpentine tailings and granite waste. The method comprises the following steps: (1) evenly mixing the serpentine tailings with the granite waste, crushing the obtained mixture, calcining, cooling to room temperature, and then carrying out ball-milling to obtain a ball abrasive A; evenly mixing silica powder with industrial aluminum oxide, and carrying out ball-milling to obtain a ball abrasive B; (3) evenly mixing the ball abrasive A with the ball abrasive B, then adding water, Suzhou clay and sodium hexametaphosphate into the obtained mixture, carrying out ball-milling, filtering, and drying to obtain a ball abrasive C; (4) carrying out pressing molding on the ball abrasive C by using a semidry method so as to prepare wafers; (5) sintering the wafers at high temperature, naturally cooling to the room temperature, crushing, smashing, and screening to obtain the refractory powder. The refractory powder prepared by method not only has higher refractoriness and strength as well as a lower thermal expansion coefficient and heat conductivity coefficient, but also has excellent thermal shock resistance and chemical corrosion resistance, thus being widely applied to the casting coatings.

Description

technical field [0001] The invention relates to a method for preparing refractory materials, in particular to a method for preparing refractory powder for casting coatings by using serpentine tailings and granite waste. Background technique [0002] In recent years, my country's economy has developed rapidly, and the resulting industrial waste and construction waste have also increased day by day. Serpentine is rich in reserves and widely distributed in my country. It is a valuable magnesium-containing mineral resource. The cotton content of serpentine ore in my country is low, and the cotton selection process is relatively backward, which makes the tailings high. The utilization rate of serpentine asbestos tailings is low. The accumulation of a large number of chrysotile asbestos tailings not only causes serious environmental pollution problems, but also the unseparated short fibers in the asbestos tailings move with the wind, which is easy to cause respiratory diseases. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/14C04B35/10C04B35/622B22C3/00
CPCB22C3/00C04B35/10C04B35/14C04B35/622C04B35/66C04B2235/3418C04B2235/3445C04B2235/3463C04B2235/349C04B2235/447C04B2235/6562C04B2235/6567C04B2235/94C04B2235/95C04B2235/9607C04B2235/9669
Inventor 谷和文丁思潮
Owner SILVER ANHUI FOUNDRY
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