For precision casting business energy production, note the following:
1, using energy-efficient processes, the rational organization of production. Such as: use self-hardening resin sand or sand instead of clay surface dry drying type, energy saving drying mold; strict ingredients, determine the appropriate composition of castings, to take effective breeding program, cast in the casting of eliminating White or hard spot to cancel the graphitization annealing process; the promotion of cast ductile iron, percentage elongation requirements shall be obtained under the cast below 12%; and maximize the use of harmonic frequency wave vibration aging process, get rid of stress relief heat aging process.
2, precision casting enterprise-scale production, that production of each casting unit in more than 5000t. Because the production of large enterprises, the furnace working time is long, the heating energy consumption of the furnace itself in equal shares to the energy consumption per tonne of castings can be greatly reduced.
3, saving material, efforts to reuse. Because the production of any material requires energy.
4, optimal design and optimization process to improve the casting process yield. In the premise of ensuring the quality of castings, gating system change, the use of heat insulation riser can usually increase the export rate, if we can export rate increased from 60 percent to 70 percent, energy consumption can be reduced by 14.3 percent.
5, using high compaction molding machine and the modern system of core technology, to minimize the casting quality, reduce the allowance. Practice has proved that high pressure molding can make casting quality than manual modeling, ordinary machine modeling alleviate 3% -5%, the allowance can be maintained at 2-3mm. Weight not only makes foundry energy conservation, energy consumption can be reduced subsequent processing.
6, improve management, reduce scrap rates. For example, an annual output of 5000t of precision casting, the rejection rate fell 1 percent each, equivalent to more than 50t castings production, according to the energy consumption per ton of 400kgee calculation, the annual energy saving 20t of coal, that per tonne of castings reduced 4kgee energy consumption. |
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