Production method of calcined kaolin for glass fibers

A technology for calcining kaolin and a production method, applied in the field of inorganic materials, can solve the problems of high COD value, unstable quality and high mullite phase content of kaolin used for glass fiber, so as to reduce energy consumption, reduce production cost and increase output Effect

Pending Publication Date: 2020-08-14
山西超牌煅烧高岭土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a production method of calcined kaolin for glass fiber to solve the technical problems of high COD value

Method used

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  • Production method of calcined kaolin for glass fibers
  • Production method of calcined kaolin for glass fibers
  • Production method of calcined kaolin for glass fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The kaolin raw materials include: by mass percentage, 20% of 1# kaolin (rock), 50% of 2# kaolin (rock) and 30% of 3# kaolin (rock).

[0047] The composition content of 1# kaolin (rock) is as follows: the following are mass percentages

[0048]

[0049] The composition content of 2# kaolin (rock) is as follows:

[0050]

[0051] The composition content of 3# kaolin (rock) is as follows:

[0052]

[0053] 1) Break the above three kinds of kaolin raw materials into small pieces less than 100mm, put them into their respective silos, and transport them to the upper material hopper of the fine crushing equipment with a metering belt, mix the small pieces and transport them to the rollers The machine is finely broken into granules below 10mm, and the granules enter the ball mill or vertical mill to be ground into 500-mesh fine powder.

[0054] 2) The fine powder enters the three-stage continuous cyclone preheating system. The preheating temperature of the first-stag...

Embodiment 2

[0057] The kaolin raw material is the same as that used in Example 1. Among them, 1# kaolin (rock) 20%, 2# kaolin (rock) 60% and 3# kaolin (rock) 20%.

[0058] 1) Break the above three kinds of kaolin raw materials into small pieces less than 100mm, put them into their respective silos, and transport them to the upper material hopper of the fine crushing equipment with a metering belt, mix the small pieces and transport them to the rollers The machine is finely broken into granules below 10mm, and the granules enter the ball mill or vertical mill to be ground into 300-mesh fine powder.

[0059] 2) The fine powder enters the three-stage continuous cyclone preheating system. The preheating temperature of the first-stage cyclone is 300°C, the preheating temperature of the second-stage cyclone is 380°C, and the preheating temperature of the third-stage cyclone is 460°C. Control the preheating time so that the loss on ignition of the intermediate product from the preheating cyclon...

Embodiment 3

[0062] The kaolin raw material is the same as that used in Example 1. Among them, 1# kaolin (rock) 20%, 2# kaolin (rock) 50% and 3# kaolin (rock) 30%.

[0063] 1) Break the above three kinds of kaolin raw materials into small pieces less than 100mm, put them into their respective silos, and transport them to the upper material hopper of the fine crushing equipment with a metering belt, mix the small pieces and transport them to the rollers The machine is finely broken into granules below 10mm, and the granules enter the ball mill or vertical mill to be ground into 1250 mesh fine powder.

[0064] 2) The fine powder enters the 3-stage continuous cyclone preheating system. The preheating temperature of the first-stage cyclone is 425°C, the preheating temperature of the second-stage cyclone is 500°C, and the preheating temperature of the third-stage cyclone is 600°C. Control the preheating time so that the loss on ignition of the intermediate product from the preheating cyclone i...

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Abstract

The invention discloses a production method of calcined kaolin for glass fibers. The method comprises the following steps: 1) crushing and finely grinding a kaolin raw material to obtain fine powder of 200 meshes or above, 2) feeding the ground fine powder into a continuous cyclone preheating system and carrying out preheating at a temperature of 300-800 DEG C, and 3) collecting the powder discharged from the upper part of a cyclone cylinder, mixing the powder with the ground powder, preheating the mixture into the cyclone cylinder, feeding the material with cyclone discharged from the lower part of the cyclone cylinder into calcining equipment, calcining at the temperature of 500-900 DEG C for 10 minutes or more, and cooling the calcined hot powder to obtain the kaolin for the glass fiber. The invention discloses a production method of calcined kaolin for glass fibers. Compared with the prior art, the preparation method has the advantages that additives do not need to be added, the raw material input cost is reduced, the COD of the prepared kaolin for the glass fibers is 300 ppm or below, the mullite phase is extremely few, the components are uniform, the fluctuation of the component content of the product is small, fusion drawing of the glass fibers is facilitated, and meanwhile continuous and large-scale production is easy to achieve through the production process.

Description

technical field [0001] The invention relates to the technical field of inorganic materials, in particular to a production method of calcined kaolin for glass fiber. Background technique [0002] Glass fiber originated from the United States and was born in the 1930s. It is an alternative material with excellent performance, which can replace steel, plate, base material and other materials in different fields. China probably had its own glass fiber industry in the 1950s, and the entire industry has developed and perfected the entire industrial chain system. From glass fiber, glass fiber products to glass fiber composite materials, it is a relatively complete manufacturing industry industrial chain. From the perspective of global data, the global glass fiber production and the proportion of China's production maintained an upward trend from 2009 to 2018. In 2018, the global glass fiber production was 7.7 million tons, of which China's production accounted for 58.4%. [0003] ...

Claims

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Application Information

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IPC IPC(8): C03C1/02
CPCC03C1/02
Inventor 冯建明陈建文史兴顺刘庆华冯琦刘松柏
Owner 山西超牌煅烧高岭土有限公司
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