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A kind of preparation method of skateboard brick
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A sliding brick and corundum technology, applied in the field of refractory materials, can solve the problems of not being able to meet the requirements of multi-furnace continuous sliding and low continuous sliding times, and achieve the effects of high strength, small hole expansion rate and low investment cost
Active Publication Date: 2022-02-22
LUOYANG KECHUANG NEW MATERIAL CO LTD
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Problems solved by technology
In this way, when casting high-oxygen steel, high manganese steel, Ca-treated steel, killed steel and other special steels, the oxygen in the molten steel reacts with the carbon in the sliding bricks, and the sliding bricks will form a metamorphic layer due to oxidation and loss of carbon, and the structure will be loose. It is easy to be damaged by molten steel washing, resulting in a low number of continuous sliding, which cannot meet the needs of multiple furnace continuous sliding
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Embodiment 1
[0025] A kind of preparation method of skateboard brick, comprises the following steps:
[0026] ① Mixing: 40wt% 5-1mm tabular alumina, 15wt% 3-1mm sintered mullite, 15wt% 1-0mm tabular alumina, 19.9wt% 325 mesh tabular alumina, 5wt% 2μm oxide Aluminum powder, 5wt% 5μm silica and 0.1wt% Castament FS65 superplasticizer were placed in a star mixer and stirred for 6 minutes to make a uniform mixture;
[0027] ②Molding: Add 6wt% silica sol modified water-based acrylic resin into the above-mentioned star mixer, stir vigorously for 6 minutes, then pour into the skateboard brick mold, and vibrate for molding;
[0028] ③Conservation and drying: Put the cast molded body together with the mold into a curing kiln, and cure it at 70°C for 16 hours, demould to obtain a green body, then put the green body into a drying kiln, and dry it at 190°C for 13 hours;
[0029] ④ Firing: Put the dried green body into a high-temperature shuttle kiln and calcinate at 1450°C for 5 hours;
[0030] ⑤Vacu...
Embodiment 2
[0038] A kind of preparation method of skateboard brick, comprises the following steps:
[0039] ① Mixing: 45wt% 5-1mm white corundum, 12wt% 3-1mm fused mullite, 15wt% 1-0mm white corundum, 20.85wt% 325 mesh tabular alumina, 3wt% 2μm alumina Micropowder, 4wt% of 5μm silica and 0.15wt% of Castament FS65 superplasticizer were placed in a star mixer and stirred for 7 minutes to make a uniform mixture;
[0040] ②Molding: Add 5.9wt% silica sol modified water-based acrylic resin into the above-mentioned star mixer, stir vigorously for 7 minutes, then pour into the skateboard brick mold, and vibrate for molding;
[0041] ③Conservation and drying: Put the above-mentioned cast molded body together with the mold into the curing kiln, and cure at 75°C for 15 hours, demould to obtain the green body, then put the green body into the drying kiln, and dry at 185°C for 15 hours;
[0042] ④ Firing: Put the dried green body into a high-temperature shuttle kiln and calcinate at 1500°C for 4 hou...
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Abstract
The invention discloses a preparation method of sliding tiles, which comprises the following steps: mixing, molding, curing, drying, firing, vacuum-pressure impregnation, re-drying, hooping, grinding, veneering and packaging. The slide brick prepared by the invention abandons the expensive pressure molding machine, adopts vibration casting molding, and has low investment cost. Skateboard bricks form a firm ceramic bond after high-temperature firing. After vacuum-pressure impregnation, they have high strength, wear resistance, no fluff, erosion resistance, small holeexpansion rate, and can maintain a compact structure after oxidation and carbon loss. Advantages, it can meet the needs of multi-furnace continuous sliding, and the technical level exceeds the similar level in this field at home and abroad.
Description
technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a preparation method of sliding bricks. Background technique [0002] The slide block is a control device for molten steel in the casting process of the continuous castingmachine in the steelmakingplant. It can precisely adjust the flow of molten steel from the ladle to the continuous castingtundish, so that the inflow and outflow of molten steel can be balanced, so that the continuous casting operation is easier to control . [0003] At present, the sliding bricks widely used in the market are divided into two categories according to the heat treatment temperature: non-fired sliding bricks and high-temperature fired sliding bricks, and the heat treatment temperatures are 500-600°C and 1300-1500°C respectively. The common features of non-burning sliding bricks and high-temperature firing sliding bricks are: the molding methods are all machine press mo...
Claims
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