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Nepheline syenite powder and production method thereof

A technology of nepheline syenite and production method, which is applied in the field of mineral powder, can solve the problems of unconcentrated particle size distribution, low purity and high iron content of powder, and achieve the effects of concentrated particle size distribution, excellent performance and superior performance.

Active Publication Date: 2014-06-11
广东奥胜新材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] my country has rich reserves of nepheline syenite, but the development, application and preparation technology of nepheline syenite is relatively backward. At present, most of them use impact dry pulverizer or ring roller Raymond mill, and the particle shape is mostly angular and not Regular particles, and more iron mixed in, lower purity, powder particle size distribution is not concentrated, such powder will affect the quality of glass and ceramic products

Method used

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  • Nepheline syenite powder and production method thereof
  • Nepheline syenite powder and production method thereof
  • Nepheline syenite powder and production method thereof

Examples

Experimental program
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Embodiment 1

[0028] The raw materials of this example are relatively stable domestic raw materials, Sichuan Nanjiang nepheline stone and Guangdong Fogang nepheline stone for formula optimization.

[0029] Raw material 1 is the original ore of Xiashi in Nanjiang, Sichuan, and its chemical composition is silicon dioxide SiO in parts by weight. 2 41.4 parts, aluminum oxide Al 2 o 3 28.1 parts, potassium oxide K 2 O 4.3 parts, sodium oxide Na 2 O 10.9 parts, ferric oxide Fe 2 O 1.7 parts, loss on ignition 5.8 parts.

[0030] The second raw material is nepheline ore from Fogang, Guangdong, and its chemical composition is silicon dioxide SiO in parts by weight. 2 61.1 parts, aluminum oxide Al 2 o 3 18.1 parts, potassium oxide K 2 O 6.0 parts, sodium oxide Na 2 O 6.7 parts, ferric oxide Fe 2 o 3 5.1 parts, loss on ignition 1.0 parts. Wherein, the loss on ignition is the weight percentage lost after burning the raw material dried at 105-110°C at 1000-1100°C.

[0031] The specific...

Embodiment 2

[0038] On the basis of Example 1, the moisture content of the semi-finished product obtained in step (2) in this embodiment is 22%, the semi-finished product in step (3), raw material 1 and water after step (1) by weight ratio 5: The ratio of 3:2 is added to the ball mill for grinding at the same time, and when the moisture content of the material in step (4) is 22%, it enters the dryer for drying process.

[0039] The technical indicators of the product in this example were tested, and the nepheline syenite powder had a magnetic substance weight content of 0.016%, a water weight content of 0.3%, a product particle size of +45 μm less than 8%, and a particle size of -5 μm less than 20%. , the internal exposure index I of the radionuclide limit of the product Ra ≤0.1, external exposure index I γ ≤0.4, the linear thermal expansion coefficient of the product is 9.6×10 -6 / °C, the pH value of the product is 10.5.

Embodiment 3

[0041] On the basis of Example 1, the moisture content of the semi-finished product obtained in step (2) in this embodiment is 24%, the semi-finished product in step (3), raw material 1 and water after step (1) are by weight 4: The ratio of 2:1 is added to the ball mill at the same time for grinding. In step (4), when the moisture content of the material is 24%, it enters the dryer for drying process.

[0042] The technical indicators of the product in this embodiment were tested, and the magnetic substance weight content in the nepheline syenite powder was 0.02%, the water weight content was 0.3%, the product particle size was +45 μm less than 8%, and the particle size was -5 μm less than 20%. , the internal exposure index I of the radionuclide limit of the product Ra ≤0.4, external exposure index I γ ≤0.7, the linear thermal expansion coefficient of the product is 10.1×10 -6 / °C, the pH value of the product is 10.3.

[0043] The chemical composition of the product in the ...

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Abstract

The invention discloses nepheline syenite powder. The nepheline syenite powder comprises the following chemical components in parts by weight: 55-59 parts of silicon dioxide, 23-25 parts of aluminium oxide, 5.4-6.6 parts of potassium oxide, 9.5-10.5 parts of sodium oxide and 0.05-0.18 part of iron oxide. The produced product purity is high through adopting a double-level segmentation grinding, segmentation different magnetic field intensity multi-stage magnetic separator iron removal and segmentation multi-stage swirler classification purification technology, wherein the weight content of magnetic materials is less than 0.02%, the weight content of titanium dioxide is less than 0.01%, the weight content of the iron oxide is less than 0.18%, and the weight content sum of the potassium oxide and the sodium oxide is above 13.9%. The linear thermal expansion coefficient of the nepheline syenite powder is more than 9.1*10<-6> / DEG C, the limited internal exposure index IRa of radionuclide is not more than 0.80, and the external irradiation index Igamma is not more than 1.00; and the nepheline syenite powder is used for high-end ceramic glaze materials and can be substituted for imported products.

Description

technical field [0001] The invention relates to a mineral powder, in particular to a nepheline syenite powder, and also relates to a production method of the nepheline syenite powder. Background technique [0002] Nepheline syenite powder is processed from nepheline syenite ore. It is a kind of holocrystalline intrusive rock. It is a new type of glass and ceramic natural non-metallic mineral glaze material in China. It is mainly used in glass, building and sanitary ceramics industries. . Compared with feldspar, nepheline syenite powder has the advantages of lower firing temperature, shorter firing time, lower energy consumption, and higher product yield and product quality. According to relevant foreign information, the use of nepheline syenite in the glass industry can reduce comprehensive energy consumption by 10% to 15%; when used in the building and sanitary ceramics industry, it can reduce the firing temperature by 50°C to 100°C, achieving a large energy saving reducti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B41/86
Inventor 苏成陆文艺罗赣明董小明朱伟国吕连焕陆永初刘志勇叶德常杨明祥陆国燕吕神峰王翠珍
Owner 广东奥胜新材料有限公司
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