Preparation method of tundish air brick
A breathable brick and tundish technology, applied in the field of iron and steel metallurgy, can solve the problems of dry gel powder not easy to disperse, steel slag easy to permeate and corrode, and uneven distribution of pores, etc., to achieve slag erosion resistance to molten steel erosion, not easy to permeate and corrode, and gas permeability Good results
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[0017] Example one
[0018] A preparation method of a tundish air-permeable brick, which is composed of the following components in parts by weight: 45 parts of tabular corundum particles, 14 parts of mullite particles, 5 parts of chromium oxide particles, and 6 parts of fine white corundum powder. α-Al 2 O 3 2 parts of fine powder, 3.5 parts of silicon powder, 0.4 part of sodium hexametaphosphate, 0.5 part of yellow dextrin, 0.1 part of azodicarbonamide, 0.4 part of boric acid, and 0.1 part of aluminum fluoride; the preparation method includes the following steps:
[0019] 1) Put the tabular corundum particles, mullite particles, and chromium oxide particles into the mixer for 5 minutes, then take them out for use;
[0020] 2) The white corundum powder, α-Al 2 O 3 Put the fine powder and silicon powder into the mixer and mix for 10 minutes;
[0021] 3) Add the mixture prepared in step 1) to the mixer of step 2) and mix for another 10 minutes, then add sodium hexametaphosphate, yellow...
Example Embodiment
[0024] Example two
[0025] A preparation method of a tundish air-permeable brick. The air-permeable brick is composed of the following components in parts by weight: 55 parts of tabular corundum particles, 10 parts of mullite particles, 8 parts of chromium oxide particles, and 4 parts of fine white corundum powder. α-Al 2 O 3 3 parts of fine powder, 1.5 parts of silicon powder, 0.6 parts of sodium hexametaphosphate, 0.3 parts of yellow dextrin, 0.3 parts of azodicarbonamide, 0.2 parts of boric acid, and 0.3 parts of aluminum fluoride; the preparation method includes the following steps:
[0026] 1) Put the tabular corundum particles, mullite particles, and chromium oxide particles into the mixer for 8 minutes, then take them out for use;
[0027] 2) The white corundum powder, α-Al 2 O 3 Put the fine powder and silicon powder into the mixer and mix for 15 minutes;
[0028] 3) Add the mixture prepared in step 1) to the mixer of step 2) and mix for another 15 minutes, then add sodium he...
Example Embodiment
[0031] Example three
[0032] A preparation method of a tundish air-permeable brick. The air-permeable brick is composed of the following components in parts by weight: 50 parts of tabular corundum particles, 12 parts of mullite particles, 6.5 parts of chromium oxide particles, and 5 parts of fine white corundum powder. α-Al 2 O 3 2.5 parts of fine powder, 2.5 parts of silicon powder, 0.5 part of sodium hexametaphosphate, 0.4 part of yellow dextrin, 0.2 part of azodicarbonamide, 0.3 part of boric acid, and 0.2 part of aluminum fluoride; the preparation method includes the following steps:
[0033] 1) Put the tabular corundum particles, mullite particles, and chromium oxide particles into the mixer to mix for 6 minutes, and take them out for use;
[0034] 2) The white corundum powder, α-Al 2 O 3 Put the fine powder and silicon powder into the mixer and mix for 13 minutes;
[0035] 3) Add the mixture prepared in step 1) to the mixer of step 2) and mix for another 13 minutes, then add so...
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