Method for manufacturing bottom blowing type cast train wheel graphite mold
A technology for graphite molds and trains, which is applied in the field of preparation of graphite molds for bottom-blown casting train wheels, can solve the problems of unsatisfactory graphite materials, and achieve the effect of good comprehensive performance and easy graphitization
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[0041] Example 1
[0042] A method for preparing a bottom-blown cast train wheel graphite mold, comprising the following steps: crushing, screening, batching, and mixing of calcined coke, and then adding medium-temperature asphalt for wet mixing, molding, primary roasting, impregnation, secondary roasting, graphite to obtain finished products;
[0043] 1. Crushing, screening, batching and mixing of calcined coke: Mix the following calcined coke aggregates together in proportion, and heat the aggregates to 90-120°C for dry mixing;
[0044] The particle size range and content of calcined coke are:
[0045]
[0046] 2. Add medium temperature asphalt for wet mixing: the mass ratio of calcined coke and medium temperature asphalt is 80:20; first heat the medium temperature asphalt while vacuuming, the heating temperature is 180 ~ 185 ℃, the vacuum degree is 2000pa, and the stirring is 30 minutes; Then, the medium temperature pitch is added to the calcined coke for kneading, and...
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[0052] Example 2
[0053] A method for preparing a bottom-blown cast train wheel graphite mold, comprising the following steps: crushing, screening, batching, and mixing of calcined coke, and then adding medium-temperature asphalt for wet mixing, molding, primary roasting, impregnation, secondary roasting, graphite The finished product is obtained; specifically:
[0054] 1. Crushing, screening, batching and mixing of calcined coke: Mix the following calcined coke aggregates together in proportion, and heat the aggregates to 90-120°C for dry mixing;
[0055] The particle size range and content of calcined coke are:
[0056]
[0057] 2. Add medium-temperature asphalt for wet mixing: the mass ratio of calcined coke and medium-temperature asphalt is 82:18; first, heat the medium-temperature asphalt while evacuating. Then add the medium-temperature pitch into the calcined coke for kneading, and the kneading temperature is 135-138°C; while mixing and kneading, add supercritical...
Example Embodiment
[0063] Example 3
[0064] A method for preparing a bottom-blown cast train wheel graphite mold, comprising the following steps: crushing, screening, batching, and mixing of calcined coke, and then adding medium-temperature asphalt for wet mixing, molding, primary roasting, impregnation, secondary roasting, graphite to obtain finished products;
[0065] 1. Crushing, screening, batching and mixing of calcined coke: Mix the following calcined coke aggregates together in proportion, and heat the aggregates to 90-95°C for dry mixing;
[0066] The particle size range and content of calcined coke are:
[0067]
[0068]2. Add medium temperature asphalt for wet mixing: the mass ratio of calcined coke and medium temperature asphalt is 80:20; first heat the medium temperature asphalt while vacuuming, the heating temperature is 184~185℃, and the vacuum degree is 5000pa. Under this condition Stir for 40 minutes; then add the medium-temperature pitch into the calcined coke for kneading...
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