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Preparation method of low-cost high-aluminum fire-resistant brick
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A refractory brick, low-cost technology, applied in the field of refractory materials, can solve the problems of affecting economic benefits, low qualification rate, large expansion, etc., and achieve the effect of reducing costs and improving the qualification rate
Inactive Publication Date: 2016-01-13
REFRACTORY MATERIAL OF SINOSTEEL CORP
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Problems solved by technology
[0004] However, this refractory brick has problems such as high expansion during sintering and low pass rate, etc., and it is technically necessary to further reduce costs and improve pass rate
Moreover, raw materials cannot be utilized, which affects economic benefits
Method used
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Embodiment 1
[0026] A method for preparing low-cost high-alumina refractory bricks, the raw materials are proportioned according to the following parts by weight:
[0027] (1) Fused brown corundum particles: 51 parts, wherein the weight ratio of fused brown corundum with a particle size of 1-0 mm to fused brown corundum with a particle size of 3-1 mm is 1:2;
[0028] (2), fused brown corundum fine powder 200 mesh: 26 parts;
[0029] (3), high alumina refractory clinker powder: 16 parts;
[0032] (6) 7 parts of 85% concentration solution of binding agent.
[0033] Pre-mixing: Mix the fused brown corundum particles and high-alumina refractory clinker powder in the above raw materials according to the stated ratio, and stir evenly;
[0034] Mixing: first mix the pre-mixed granules according to the stated weight ratio, add special binder 85% concentration solution and stir evenly, the...
Embodiment 2
[0038] A method for preparing low-cost high-alumina refractory bricks, the raw materials are proportioned according to the following parts by weight:
[0039] (1), fused brown corundum particles: 53 parts; wherein the weight ratio of fused brown corundum with a particle size of 1-0 mm to fused brown corundum with a particle size of 3-1 mm is 1:2.5;
[0040] (2), fused brown corundum fine powder 200 mesh: 20 parts;
[0041] (3), high alumina refractory clinker powder: 16 parts;
[0045] The manufacturing process is the same as in Example 1, and the sintering temperature is 1420° C. and the sintering time is 5 hours.
Embodiment 3
[0047] A method for preparing low-cost high-alumina refractory bricks is characterized in that the raw materials are proportioned according to the following parts by weight:
[0048] (1), fused brown corundum particles: 43 parts, wherein the weight ratio of fused brown corundum with a particle size of 1-0 mm to fused brown corundum with a particle size of 3-1 mm is 1:3;
[0049] (2), fused brown corundum fine powder 200 mesh: 30 parts;
[0050] (3), high alumina refractory clinker powder: 20 parts;
[0052] (5), Guangxi white mud 200 mesh: 2.5 parts;
[0053] (6), 8 parts of binding agent.
[0054] The manufacturing process is the same as in Example 1, but the sintering temperature is 1430° C. and the sintering time is 4 hours.
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Abstract
The invention provides a preparation method of low-cost high-aluminum fire-resistant bricks, wherein the raw materials includes a powder material and a combination agent. The powder material includes: 43-53 parts of electric-smelted brown aluminiumoxide particles, 20-30 parts of electric-smelted brown aluminiumoxidefine powder, 8-12 parts of aluminum oxide micro-powder, 12-20 parts of a high-aluminum fire-resistant clinker powder material and 2-3 parts of white mud from Guangxi province, and also includes 5-8% by weight of a 85% phosphorus acid solution, wherein the high-aluminum fire-resistant clinker is obtained from crushed high-aluminum fire-resistant bricks and is 1-3 mm and 0-1 mm in granularities. The electric-smelted brown aluminium oxide particles and the high-aluminum fire-resistant clinker powder material are mixed and stirred uniformly and then are added with the combination agent with uniform stirring. The mixture then is added by the electric-smelted brown aluminium oxidefine powder, the aluminum oxide micro-powder and the white mud from Guangxi province and is continuously subjected to mixing until the mixture is lumped uniformly. The mixture then is subjected to press moulding in a mould and is sintered at 1380-1430 DEG C for 4-6 h. In the preparation method, on the basis of the main characters of ultra-strong anti-permeation high-aluminum bricks, the high-aluminum fire-resistant clinker is employed, so that the fire-resistant brick is reduced in cost and increased in qualified rate.
Description
technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a method for preparing low-cost high-aluminarefractory bricks, which can be used in high-temperature kilns and have super-strong permeability resistance. Background technique [0002] At present, when users choose lining refractory materials such as aluminum smelting furnaces, holding furnaces, and homogenizing furnaces involved in the processing of molten aluminum, they have always paid great attention to the conventional performance of refractory materials, and paid little attention to the permeability of molten aluminum. During the process, refractory materials with excellent conventional performance are often penetrated and eroded by molten aluminum, which not only leads to low service life of refractory materials, time-consuming and labor-consuming, but also pollutes molten aluminum and reduces the quality of molten aluminum. Ordinary high-alumina b...
Claims
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Application Information
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