A kind of preparation method of ceramic grinding body for gypsum mill

A grinding body and ceramic technology, which is applied in the field of preparation of ceramic grinding bodies for gypsum mills, can solve the problems of energy consumption and large loss, and achieve the effects of low wear rate, enhanced toughness and high hardness

Inactive Publication Date: 2018-04-10
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the cement mill, the ball milling process mainly plays the dual functions of crushing and grinding, while in the gypsum grinding process, since the calcined gypsum particle size is small (generally greater than 50 mesh), the grinding function plays a major role, so it has a strong impact force and high The dense metal grinding body consumes a lot of energy and loss during use, and cannot exert its more powerful effect

Method used

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  • A kind of preparation method of ceramic grinding body for gypsum mill
  • A kind of preparation method of ceramic grinding body for gypsum mill

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0018] A preparation method of ceramic grinding body for gypsum mill, comprising the following steps:

[0019] (1) Ingredients: Prepare raw materials according to the weight percentage of the following substances: Al 2 o 3 : 73%, SiO 2 : 5.7%, Cr 2 o 3 : 1.55%, TiO 2 : 1.3%, MnO : 1.65%, ZrO 2 : 2.4%, BaO: 2.3%, Siberite: 5.4%, ZnO: 2.4%, nano-colloidal silicon: 0.7%, co-solvent 3.6%; the co-solvent is NH 4 Cl.

[0020] (2) Grinding: Grinding the prepared materials, so that the particles after grinding pass through a 250-mesh sieve, and the sieve residue is less than 2%;

[0021] (3) Use a filter press to remove the moisture in the slurry in step (2), after dehydration, after the second vacuum mud refining, let it stand for 45 hours to stale;

[0022] (4) Slurry spray granulation, extruded by extrusion process to obtain green body, and then dry the green body at 80~100°C for 29~32 hours;

[0023] (5) The molded green body is sintered at 1350~1400°C and kept for 7 h...

Embodiment example 2

[0029] A preparation method of ceramic grinding body for gypsum mill, comprising the following steps:

[0030] (1) Ingredients: Prepare raw materials according to the weight percentage of the following substances: Al 2 o 3 : 75.9%, SiO 2 : 5.3%, Cr 2 o 3 : 0.9%, TiO 2 : 1.25%, MnO : 1.55%, ZrO 2 : 1.9%, BaO: 1.6%, staltite: 5.2%, ZnO: 2.3%, nano-colloidal silicon: 0.5%, co-solvent 3.6%; wherein the co-solvent is a combination of albite and MgO, the composition The ratio is 35.5% for albite and 64.5% for MgO.

[0031] (2) Grinding: Grinding the prepared materials, so that the particles after grinding pass through a 250-mesh sieve, and the sieve residue is less than 2%;

[0032] (3) Use a filter press to remove the moisture in the slurry in step (2), after dehydration, after the second vacuum mud refining, let it stand for 44 hours to stale;

[0033] (4) Slurry spray granulation, extruded by extrusion process to obtain green body, and then dry the green body at 80~120...

Embodiment example 3

[0040] A preparation method of ceramic grinding body for gypsum mill, comprising the following steps:

[0041] (1) Ingredients: Prepare raw materials according to the weight percentage of the following substances: Al 2 o 3 : 62%~83%, SiO 2 : 6.2%, Cr 2 o 3 : 1.6%, TiO 2 : 1.35%, MnO : 1.65%, ZrO 2 : 3.2%, BaO : 2.6%, Saporite: 5.9%, ZnO : 2.5%, nano-colloidal silicon: 0.8%, co-solvent 3.5%; the co-solvent is AlF 3 and CaF2 A combination of 55% and 45%.

[0042] (2) Grinding: Grinding the prepared materials, so that the particles after grinding pass through a 250-mesh sieve, and the sieve residue is less than 2%;

[0043] (3) Use a filter press to remove the moisture in the slurry in step (2), after dehydration, after the second vacuum mud refining, let it stand for 40-46 hours to stale;

[0044] (4) Slurry spray granulation, extruded by extrusion process to obtain green body, and then dry the green body at 80~120°C for 29~32 hours;

[0045] (5) The molded green bod...

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Abstract

The invention provides a preparation method of a ceramic grinding body for gypsum milling, which mainly includes batching, grinding, suction filtration, de-sliming after secondary vacuum refining, aging, granulation, extrusion molding, and firing at a certain temperature. to make. The preparation method of the invention has simple process, low energy consumption and wide application range. The prepared ceramic grinding body for gypsum mill has light weight and low wear rate, which can greatly reduce the energy consumption of grinding, prolong the service life of the grinding body, and reduce the cost; there is no impurity metal iron ion doping in the grinding process, and it does not affect the quality of building gypsum powder. Whiteness and strength; ceramic grinding body can also reduce electrostatic adsorption, which is beneficial to improve grinding efficiency.

Description

technical field [0001] The invention relates to a preparation method of a ceramic grinding body for gypsum milling, and belongs to the technical field of preparation of functional ceramics. Background technique [0002] Gypsum stone or industrial by-product gypsum exists in the form of calcium sulfate dihydrate. There are two crystal waters in its molecular formula. Only by removing one and a half crystal water to form calcium sulfate hemihydrate can it have gelling properties. The process of removing crystal water is gypsum calcination. The physical and mechanical properties of gypsum calcined into building gypsum powder are closely related to particle size and gradation. Take desulfurized gypsum, an industrial by-product, as an example. The particle size distribution of desulfurized gypsum is narrow, the gradation is poor, the specific surface area is small, the rheological properties are poor during the hydration and hardening process, and it is easy to segregate, layer ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/10C04B35/622C04B35/64
CPCC04B35/10C04B35/622C04B35/64C04B2235/3206C04B2235/3208C04B2235/3215C04B2235/3217C04B2235/3232C04B2235/3241C04B2235/3244C04B2235/3262C04B2235/3284C04B2235/3409C04B2235/3418C04B2235/3436C04B2235/3472C04B2235/444
Inventor 张国辉王慧其他发明人请求不公开姓名
Owner UNIV OF JINAN
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