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首页> 外文期刊>Metallurgical and Materials Transactions >Viscosity of Copper Slags from Chalcocite Concentrate Smelting
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Viscosity of Copper Slags from Chalcocite Concentrate Smelting

机译：球铁矿精矿冶炼铜渣的粘度

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The viscosity of smelting slags from the Glogow copper plant in Poland was measured using a concentric cylinder viscometer. These slags contain typically 45 pct SiO_2, 16 pct CaO, 8 pct MgO, 11 pct Al_2O_3, and only 5 to 7 pct total iron. The viscosity was measured as a function of the CaO, MgO, SiO_2, Cu_2O, Cr_2O_3, and Fe_3O_4 contents in the temperature range from 1473 to 1623 K. Silica and chromium oxide additions increased the viscosity, while small additions of the other oxides decreased the viscosity. However, at large additions of CaO or MgO, cooling resulted in a rapid increase in the viscosity upon reaching the transition temperature. This critical transition temperature increased with increasing additions of CaO and MgO. This was explained by the precipitation of solid particles upon reaching the saturation limit. Depending on the slag composition, the activation energy for viscous flow was found to be in the range from 200 to 370 kJ/mol.
机译：使用同心圆筒粘度计测量了波兰Glogow铜厂的冶炼炉渣的粘度。这些炉渣通常包含45 pct SiO_2、16 pct CaO，8 pct MgO，11 pct Al_2O_3，并且仅铁总5到7 pct。测量粘度是在1473至1623 K的温度范围内CaO，MgO，SiO_2，Cu_2O，Cr_2O_3和Fe_3O_4含量的函数。二氧化硅和氧化铬的添加会增加粘度，而少量其他氧化物会降低粘度。粘度。但是，大量添加CaO或MgO时，冷却会导致达到过渡温度时粘度迅速增加。临界转变温度随CaO和MgO添加量的增加而增加。这可以通过达到饱和极限时固体颗粒的沉淀来解释。取决于炉渣成分，发现粘性流的活化能在200至370kJ / mol的范围内。

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