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Method for preparing difficult-to-harden potassium titanate with low hygroscopicity and high bulk density

A technology of bulk density and manufacturing method, applied in chemical instruments and methods, titanium compounds, inorganic chemistry, etc., can solve the problems of energy consumption, difficulty in absorbing moisture, high hardness of powder particles, etc.

Inactive Publication Date: 2011-05-25
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention focuses on solving the surface structure and activity of potassium titanate powder, as well as the heavy weight of the powder, making it difficult to absorb moisture. Even if a small amount of moisture is absorbed, it will not cause powder compaction and affect the performance; Treatment, on the one hand, can reduce the sintering temperature of potassium titanate, solve the problem of high-temperature sintering energy consumption, and the powder particle hardness is too high, on the other hand, it can make the powder have good bulk density, fluidity and dispersibility Good

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Mix rutile ilmenite powder and anhydrous potassium carbonate according to TiO 2 : K 2 Weigh the mole fraction of O=2.9, add boric acid and silicon dioxide in an amount of 3% of the total amount, add them together into the ball mill jar, add a certain amount of agate block, and ball mill for 2 hours; mix the materials into a box bowl , Calcined in a box furnace at 900°C for 2h; naturally cooled to about 400°C, and cooled out of the furnace. Respectively crushed, pulverized, screened, weighed and packaged.

Embodiment 2

[0011] Mix rutile ilmenite powder with anhydrous potassium carbonate and anhydrous sodium carbonate according to the TiO in the product 2 The mass fraction is 77%, Na 2 O mass fraction 13%, K 2 O mass fraction 7% is calculated and weighed. Activated carbon and silicon dioxide are added in an amount of 3% of the total amount, and they are added to a ball mill jar together with a certain amount of agate block, and ball milled for 2 hours; the mixture is put into a box bowl, and calcined in a tunnel kiln at 900°C The residence time in the high temperature zone is not less than 1h; it is gradually cooled in the cooling section, and then crushed, pulverized, screened, weighed and packaged.

Embodiment 3

[0013] Mix rutile ilmenite powder with anhydrous sodium carbonate and anhydrous potassium carbonate according to the TiO in the product 2 Quality score is 73%, K 2 O mass fraction 16%, Na 2 O mass fraction 5% is calculated and weighed. Boric acid and silicon dioxide are added in an amount of 3% of the total amount, and the amount of activated carbon is 7%. They are added to a ball mill pot together with a certain amount of agate block, and ball milled for 2 hours; the mixture is put into a box bowl , Calcined in a well-type furnace, the residence time in the high temperature zone of 900 ℃ is not less than 1.5h; after gradual cooling, it is crushed, pulverized, screened, weighed and packaged.

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Abstract

The invention discloses a method for preparing difficult-to-harden potassium titanate with low hygroscopicity and high bulk density. The method is mainly characterized in that: a titanium source is compounded with a potassium source under calcination condition by auxiliary agents and the like, so that the surface condition and structure of the product potassium titanate are improved, and the product potassium titanate is difficult to harden, has the low hygroscopicity, the high bulk density, high flowability and high dispersibility and is particularly suitable for producing flux cored wires.

Description

technical field [0001] The invention relates to potassium titanate powder used for welding materials, friction materials, lubricating materials, reinforcing materials, heat-resistant and heat-insulating materials, coatings and paper additives, especially the preparation method of potassium titanate for flux cored wire, which belongs to inorganic material field. Background technique [0002] Alkali metal titanates are alkaline and highly hygroscopic powder materials, especially potassium titanate. If the packaging or storage is not proper, the raw materials will absorb moisture very quickly. At the same time, some alkali metal titanates Severe hardening will also occur, not only because of moisture absorption and hardening, the dispersibility and fluidity of the powder will deteriorate, and the performance will decrease, but also due to the change of the actual dosage, the uneven distribution of raw materials will lead to the decline of application performance. In addition, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/00
Inventor 商少明王慧孙芳任春霞陈新刘瑛
Owner JIANGNAN UNIV
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