Method for preparing zircon bricks using dense zircon aggregates

A technology of zircon bricks and zircon, which is applied in the field of refractory materials, can solve the problems of too many zircons and affect the performance of high-temperature use, and achieve the effects of high refractoriness, excellent alkali corrosion resistance, and reduced hot repair

Active Publication Date: 2020-10-09
ZIBO GT INDAL CERAMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If it is used in a high-temperature kiln, the high-temperature performance will be affected due to the introduction of too many impurities into the zircon

Method used

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  • Method for preparing zircon bricks using dense zircon aggregates
  • Method for preparing zircon bricks using dense zircon aggregates
  • Method for preparing zircon bricks using dense zircon aggregates

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0034] 1. Preparation of zircon ball mill powder and dense zircon aggregate:

[0035] According to the embodiment scheme batching, use ZrO 2 ≥65% of zircon powder, add 0.6-1.2% of titanium dioxide and other sintering aids, wet grinding in grinding equipment such as ball mill or stirring mill, and grind to particle size D 50 = 1-6 micron mud. The slurry is dried or spray granulated to obtain zircon ball mill powder.

[0036] The powder is subjected to 50-200MPa isostatic pressing, semi-dry press molding, or mud casting to form a green body. After the green body is dried, use a shuttle kiln or other kilns to heat at 1400-1600°C for 10-100 hours and fire to make the bulk density > 4.0g / cm 3 aggregate body. Through crushing, sieving, and magnetic separation, dense zircon aggregates of ≤3mm or ≤5mm are produced.

[0037] The ingredients ratio and bulk density test results of the prepared dense zircon aggregate are shown in Table 1.

[0038] Table 1

[0039] raw mate...

Embodiment 4

[0041]The bulk density of the aggregate obtained in Example 4 is the largest, and the dense zircon aggregate obtained in Example 4 is used to prepare zircon bricks. The specific examples are as follows:

[0042] Use a wheel mill mixer for semi-dry mixing. Put 0~5mm or 0~3mm dense zircon aggregate and ≤0.1mm zircon sand into the wheel mill mixer and mix evenly; then add liquid binder and mix evenly; ≤0.044mm zircon powder, ≤6μm Zircon ball milled powder and dry powder organic binder are added to the cone mixer, mixed evenly, put into the wheel mill mixer, mixed for 10-20 minutes, and made into semi-dry mud; put into the molding silo Sleepy material 4-5 hours.

[0043] Use friction press or hydraulic press to form, forming density > 3.70g / cm 3 .

[0044] The green body is dried using a far-infrared drying box or other drying equipment at a drying temperature of 80-120°C.

[0045] Use a shuttle kiln or other firing kilns, the firing temperature is 1400-1600 °C, and the heat p...

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Abstract

The invention relates to a method for preparing a zircon brick from compact zircon aggregate, belonging to the technical field of refractory materials. The method comprises the following steps: with compact zircon aggregate, zircon sand, zircon powder and ball-milled zircon micro powder as raw materials, adding a dry-powder organic binding agent and a liquid binding agent and successively carryingout mixing, molding, drying and sintering so as to obtain the zircon brick. The method provided by the invention is scientific and reasonable in design, easy and practicable; and the prepared zirconbrick has strong molten glass resistance, alkali erosion resistance and thermal shock resistance.

Description

technical field [0001] The invention relates to a method for preparing zircon bricks by using dense zircon aggregates, belonging to the technical field of refractory materials. Background technique [0002] Refractory materials are the main construction materials of glass furnaces, which directly affect the life of glass furnaces and the quality of glass. With the extension of the design life of glass furnaces, the requirements for refractory materials in key parts are also getting higher and higher. In the early glass furnace design, the side wall bricks used the same material as the roof, and were placed directly on the fused zirconia corundum breast wall. Since the silica bricks and fused zirconia corundum bricks were eutectic at high temperature, the life of the glass furnace was seriously affected. . [0003] Chinese patent application 201010530953.0 (CN 102030546 A) discloses a zircon product containing special zircon particles, which is obtained by crushing, picklin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66C04B35/482C04B35/626C04B35/632C04B35/634C04B35/636
CPCC03B5/43C04B35/482C04B35/6261C04B35/632C04B35/63416C04B35/6365C04B2235/3201C04B2235/3206C04B2235/3208C04B2235/3217C04B2235/3232C04B2235/3272C04B2235/3418C04B2235/608C04B2235/77C04B2235/96
Inventor 张晓峰孙文礼李玉强张瑛李志军郑飞
Owner ZIBO GT INDAL CERAMICS
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