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In-situ synthesized mullite whisker reinforced high-temperature ceramic roller

A technology of mullite whiskers and high-temperature ceramics is applied in the field of in-situ generation of mullite whiskers, which can solve the problem of high temperature strength creep of materials, weak binding force of main crystal phase mullite crystals, and restricting roller kilns. Development and application, etc., to achieve the effect of improving high temperature flexural strength and good thermal shock resistance

Inactive Publication Date: 2012-10-03
JINGDEZHEN NUONAI TECH CERAMICS
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AI Technical Summary

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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Examples

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Embodiment Construction

[0012] Implementation column 1:

[0013] Step 1: Prepare raw materials of andalusite, a zirconium-containing titanium series mineralizer: Add 100kg andalusite concentrate powder (250 mesh), 5kgAlF, 9kg ZrO in sequence in a vibrating mill with a volume of 200L 2 , 2kg TiO2 2 and 10kg of kyanite concentrate powder (325 mesh), after vibrating ball milling for 240 minutes, the particle size (D97) of the mixture was determined to be 9 microns for later use;

[0014] Step 2: Prepare in-situ mullite whisker-reinforced high-temperature ceramic rollers: 190kg of Suzhou kaolin, 50kg of refractory ball clay, 90kg of zirconium silicate, and 140kg of zirconium-containing titanium prepared in the first step are sequentially loaded into a 2-ton ball mill Mineralizer andalusite, 150kgα-Al 2 o 3 Micropowder (4 micron grade) and 850kg water are released after ball milling for 4.5 hours. The slurry is screened and iron-removed and then flows into the slurry storage tank with a screw mixer....

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Abstract

The invention relates to an in-situ synthesized mullite whisker reinforced high-temperature ceramic roller which is prepared from natural raw mineral materials and industrial raw chemical materials. The in-situ synthesized mullite whisker reinforced high-temperature ceramic roller comprises the following compositions in percentage by weight: 15-25% of kaolin, 5-15% of refractory clay, 15-25% of alpha-Al2O3 micro-powder, 3-10% of zirconium silicate, 10-20% of zirconium-titanium mineralizer containing andalusite and 30-40% of refractory corundum; and the ceramic roller is prepared through the following steps: ball-milling, stirring, molding, drying, roasting at a temperature of 1500-1600 DEG C, carrying out heat preservation for 5-10 hours, and naturally cooling, thus obtaining a ceramic roller product (the rupture strength of the product is greater than 57.40 MPa at a temperature of 1350 DEG C). The in-situ synthesized mullite whisker reinforced high-temperature ceramic roller provided by the invention has a wide application prospect in roasting roller kilns for products such as high-temperature and high-load domestic ceramics, building sanitary ceramics, high-grade large-sized vitrified tiles, technical ceramics and magnetic materials and the like.

Description

technical field [0001] The invention belongs to the technical field of preparing ceramic rollers, in particular to an in-situ generation of mullite whiskers [0002] Reinforced high temperature ceramic rollers. Background technique [0003] 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. Due to the limitation of manufa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/81C04B35/10C04B35/622
Inventor 王永华郑景庐
Owner JINGDEZHEN NUONAI TECH CERAMICS
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