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关于硫铁矿渣—石灰制品受潮膨胀的原因,过去一直认为是:硫铁矿渣中固有的硫酸钙在制品中与含铝酸盐物质、氢氧化钙和水逐渐发生水化反应,生成钙矾石所致。1982年初,我省赵县磷肥厂生产的硫铁矿渣砖发生了严重的受潮膨胀现象,使该生产线陷于停产。我们在研究这一问题时,对膨胀机理进行了探讨,找到了膨胀原因,主要结论如下:1、制品膨胀与硫铁矿渣的氧化程度有关在试验中发现:颜色发红的制品膨胀轻微,颜色棕色或发黑的制品膨胀严重。然而,颜色发红正说明硫铁矿渣在沸腾炉中氧
With regard to the reason why the pyrite slag-lime product is damp-swelled, it has been considered in the past that the inherent calcium sulfate in the pyrite slag gradually reacts with the aluminate-containing substance, calcium hydroxide, and water in the product to generate calcium. Due to meteorites. At the beginning of 1982, the pyrite slag bricks produced by Zhaoxian Phosphate Fertilizer Plant in our province suffered from severe moisture expansion, which caused the production line to stop production. When we studied this issue, we discussed the expansion mechanism and found the reason for the expansion. The main conclusions are as follows: 1. The product expansion was related to the oxidation degree of pyrite slag. In the test, it was found that the product with red color was slightly swollen. Color brown or darkened products swell. However, the red color indicates that the pyrite slag is in the boiling furnace