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老煤渣是煤块在锅炉充分燃烧后结了块的炉渣。选择这种老煤渣作为坭型的主要材料,比通常应用耐火砖屑、缸瓦粒、焦炭粒等作为坭型材料便宜,容易得到与加工。坭型的主要材料是白坭和填充料,用煤渣作为坭型的填充料能增强铸型的强度,提高其透气性和耐火性,在高温铁水作用下,其热膨胀变形小,不溃烂。所以,老煤渣是坭型的合适填充料。我厂应用坭型生产6吋、8吋钢锭模,有几年的历史了。坭型是一种古老的工艺,这里
The old coal cinder is a piece of coal that has become a block after the boiler has been fully burned. Choosing this old coal cinder as the main material of the 坭 type is cheaper and easier to get and process than the usual application of refractory bricks, cylinder tile particles, coke pellets and the like. The main material of 坭 type is white 坭 and filler, with cinder as 坭-type filler can enhance the strength of the mold, improve its permeability and fire resistance, high temperature hot metal under the action of its thermal expansion deformation is small, not festering. Therefore, the old cinder is a suitable type of filler. I plant production 坭 type 6-inch, 8-inch ingot mold, a few years of history.坭 type is an ancient craft, here