High-alumina brick and manufacturing method thereof
A high-alumina brick and super-grade bauxite technology, applied in the field of refractory materials, can solve the problems of high ash concentration, wear, and high flow rate, achieve high refractoriness, improve erosion resistance and thermal shock resistance, and have good thermal shock resistance Effect
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[0027] Example 1:
[0028] Combine 15 parts of 3~5mm super bauxite aggregate, 30 parts of 1~3mm super bauxite aggregate, 20 parts of 0~1mm super bauxite aggregate, 28 parts of 220 mesh super fine bauxite powder, 5 parts of 320 Purpose Zirconium carbide fine powder, 2 parts Guangxi mud, 9 parts composite binder, and 4 parts water are mixed and pressed into a 3150KN friction brick press. The semi-finished product has a bulk density of 2.92~3.07g.cm -3 . After baking at 90°C for 24 hours, the residual moisture content of the green body ≤2%. The firing can be fired in a pusher kiln or a tunnel kiln. After firing at 1500°C to 1550°C for 4 hours, the required finished high alumina brick can be obtained.
Example Embodiment
[0029] Example 2:
[0030] Combine 10 parts of 3~5mm special grade bauxite aggregate, 38 parts of 1~3mm special grade bauxite aggregate, 15 parts of 0~1mm special grade bauxite aggregate, 30 parts of 220 mesh special grade bauxite powder, 6 parts of 320 Purpose Zirconium carbide fine powder, 1 part of Guangxi mud, 8 parts of composite binder, and 5 parts of water are mixed and pressed into a 3150KN friction brick press. The semi-finished product has a bulk density of 2.9~3.05g.cm -3 . After baking at 80°C for 36 hours, the residual moisture content of the green body is ≤2%. The firing can be fired in a pusher kiln or a tunnel kiln. After firing at 1500°C to 1550°C for 3 hours, the required finished high alumina brick can be obtained.
Example Embodiment
[0031] Example 3
[0032] Combine 5 parts of 3~5mm special grade bauxite aggregate, 40 parts of 1~3mm special grade high bauxite aggregate, 20 parts of 0~1mm special grade bauxite aggregate, 25 parts of 220 mesh special grade bauxite powder, 7 Parts of 320 mesh zirconium carbide fine powder, 3 parts of Suzhou No. 2 mud, 10 parts of composite binder, and 6 parts of water are mixed and pressed into a 3150KN friction brick press. The bulk density of the semi-finished product is 2.85~3.02g.cm -3 . After baking at 60°C for 48 hours, the residual moisture content of the green body is ≤2%. The firing can be fired in a pusher kiln or a tunnel kiln. After firing at 1500°C to 1550°C for 3.5 hours, the required finished high alumina brick can be obtained.
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