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Medium-high temperature firing soaking-free sliding gate brick and preparation method thereof

A medium-high temperature, sliding brick technology, applied in the field of inorganic non-metallic refractory materials, can solve the problems of a large number of harmful substances, high energy consumption, reduced erosion resistance, etc., and achieve the effect of performance advantages and high energy consumption

Active Publication Date: 2017-09-15
无锡市南方耐材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This production process not only consumes a lot of energy, the consumption of natural gas is as high as 1800 cubic meters per ton, but also a large amount of harmful substances are produced during impregnation, dry distillation and decoking of tar and asphalt, which has a great impact on the environment and human health; at the same time, the production cycle need a month
In contrast, the thermal shock resistance of aluminum-carbon and aluminum-zirconium is better than that of aluminum-magnesium and aluminum-magnesium-carbon-zirconium, but the corrosion resistance is reduced, especially when casting high-oxygen steel, high-manganese steel, Ca-treated steel, and sedated steel. For steel and other steel types, due to the reaction of oxygen in molten steel with carbon in the sliding brick, a metamorphic layer is formed due to oxidation and loss of carbon, and the structure is loose, which is washed and damaged by molten steel; the Al in the sliding brick 2 o 3 Reacts with FeO(MnO) in molten steel to form low-melting material, causing severe chemical corrosion

Method used

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  • Medium-high temperature firing soaking-free sliding gate brick and preparation method thereof
  • Medium-high temperature firing soaking-free sliding gate brick and preparation method thereof
  • Medium-high temperature firing soaking-free sliding gate brick and preparation method thereof

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Embodiment 1

[0036] Raw material specifications are as follows:

[0037] White corundum Al 2 o 3 Content ≥ 98.5%;

[0038] Fused zirconia corundum: Al 2 o 3 Content ≥ 71%, ZrO2 content ≥ 24%;

[0039] 98 magnesia: MgO content ≥ 98%;

[0040] Sintered mullite: Al 2 o 3 Content ≥ 70%;

[0041] α-alumina fine powder (α-Al 2 o 3 ): alumina content ≥ 98%;

[0042] Graphite: C content ≥ 98%;

[0043] Metal silicon powder: Si content ≥ 97%;

[0044] High temperature asphalt: C content ≥ 60%;

[0045] Boron carbide: C content ≥ 20%, B content ≥ 74%;

[0046] High temperature burning powder: Al 2 o 3 Content ≥ 75%;

[0047] Sodium bentonite: Al 2 o 3 Content ≥ 10%, SiO2 content ≥ 65%;

[0048] Phenolic resin: carbon residue 45±4, solid content 75-80%, viscosity 16000-18000mpa.

[0049] The basic production process of the inventive product is: according to the formula in Table 1, alumina raw material (white corundum) and fused zirconia corundum are batched according to the formu...

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Abstract

The invention discloses a medium-high temperature firing soaking-free sliding gate brick and a preparation method thereof. The brick comprises the following components in percentage by weight: 45-60% of white corundum, 13-18% of fused alumina zirconia, 3-5% of magnesia, 6-10% of sintered mullite, 4-6% of alpha-alumina micro powder, 4-5% of graphite, 2-4% of metal silicon powder, 1-3% of high-temperature asphalt, 0.5-1% of boron carbide, 4-6% of high-temperature firing promotion powder and 2-4% of sodium bentonite, wherein the sum of weights of all components in the formula is 100%, and 4-5% of a phenolic resin is further added. The brick is excellent in thermal shock resistance, peeling resistance and oxidation resistance, the toughness of a product is improved, the situations that the brick is affected by extreme cold and hotness in the use process and is cracked and peeled and the use is affected are effectively avoided, and the purpose of prolonging the service life is achieved.

Description

technical field [0001] The invention belongs to the field of inorganic non-metal refractory materials based on alumina, zirconia, silicon dioxide and carbon, and in particular relates to a non-impregnation sliding brick fired at medium and high temperature and a preparation method thereof. Background technique [0002] The sliding nozzle device is composed of upper and lower plates made of refractory materials and a mechanical drive structure, and is installed outside the bottom of the ladle. The upper slide is fixed and the lower slide is movable. According to the skateboard action mode, it can be divided into three categories: 1) linear reciprocating type; 2) linear propulsion type; 3) rotary type. By driving the pull rod, the slide plate reciprocates in a straight line. When the casting holes on the upper and lower plate bricks are staggered, the drainage sand is filled in the upper nozzle hole, and the steel ladle can be connected to the steel; when the casting holes ov...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/106C04B35/634
CPCC04B35/106C04B35/63476C04B2235/3206C04B2235/3463C04B2235/349C04B2235/3821C04B2235/425C04B2235/428C04B2235/48C04B2235/77
Inventor 杭文明王远林
Owner 无锡市南方耐材有限公司
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