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Method for making low-creepage and high-strength high temperature resisting ceramic roller

A technology of high-temperature-resistant ceramics and manufacturing methods, which is applied in the field of inorganic non-metallic materials (ceramics), and can solve the problems that restrict the development and application of roller kilns, the main crystal phase of mullite crystals has weak bonding force, and the high-temperature strength and creep of materials are large And other problems, to achieve the effect of high temperature strength improvement, high temperature creep reduction, good thermal shock resistance

Inactive Publication Date: 2013-03-27
JINGDEZHEN NUONAI TECH CERAMICS
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Problems solved by technology

Due to the limitation of manufacturing technology and firing temperature, the bonding force between the main crystal phase mullite crystals in the obtained ceramic roller material structure is not strong, and there are many glass phases and pores, resulting in high temperature strength of the material. Low creep and large creep, it can only be used at temperatures below 1300°C and under small loads, which seriously restricts the development and application of this continuous, high-efficiency, and energy-saving roller kiln

Method used

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Embodiment Construction

[0010] Implementation column 1:

[0011] Step 1: Prepare the raw material of andalusite, a zirconium-containing titanium mineralizer: Add 100kg of andalusite concentrate powder (250 mesh), 5kg of AlF 3 , 7kg ZrO 2 , 3kg TiO2 2 and 10kg kyanite concentrate powder (325 mesh), vibrating ball mill for 240 minutes, measure the particle size of the mixture (D97) at 9 microns, stop the machine, and unload for standby;

[0012] Step 2: Preparation of low-creep, high-strength, and high-temperature-resistant ceramic rollers: 240kg of Suzhou kaolin, 120kg of refractory ball clay, 60kg of zirconium silicate, and 100kg of zirconium-containing titanium-based red prepared in the first step are sequentially loaded into a 2-ton ball mill Pillar, 180kg (4 micron grade) calcined α-Al 2 o 3 Micropowder and 850kg of water are released after ball milling for 4.5 hours. The slurry flows into the slurry storage tank containing the spiral mixer after being screened and iron-removed. While stirrin...

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Abstract

The invention relates to a method for making a low-creepage and high-strength high temperature resisting ceramic roller. A mullite whisker in-situ reinforcement technology and a crystal boundary glass phase crystallization technology are adopted, a mineralizer containing zirconium and titanium is added to enable andalusite mineral particles in a blank to generate uniformly distributed mullite whiskers in-situ in the high-temperature reaction of kaolin with alpha-Al2O3, and thermal treatment is carried out in the cooling process to crystallize a crystal boundary liquid phase. Compared with thetraditional same type of high temperature resisting ceramic roller, the finally prepared low-creepage and high-strength high temperature resisting ceramic roller has the advantages that the high temperature strength below 1350DEG C is improved by 15-20%, and the high-temperature creepage under the condition of 1350DEG C*50hr is reduced by more than 35%.

Description

technical field [0001] The invention belongs to the field of inorganic non-metallic materials (ceramics), and in particular relates to a method for manufacturing low-creep, high-strength, and high-temperature-resistant ceramic roller rods. Background technique [0002] Ceramic rollers refer to refractory products made of clay refractory raw materials and natural mineral raw materials through processes such as selection, crushing, forming, and calcination. Usually, the main raw materials for the production of ceramic rollers are kaolin, refractory clay, α-Al 2 o 3 And refractory corundum aggregate, etc. Until today, most of the ceramic rollers used in roller kilns are mainly made of mullite-corundum, mullite-corundum-deleyite. In this material, refractory corundum is used as aggregate, kaolin and α-Al 2 o 3 High-temperature reaction synthesizes mullite and a small amount of glass phase as a combination (matrix), and there are a certain number of pores in the matrix. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66C04B35/622
Inventor 王永华郑景庐
Owner JINGDEZHEN NUONAI TECH CERAMICS
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