吹き込み熔錬による亜鉛製錬法の熱力学考察

抄録

Thermodynamic calculations were applied for the new idea of zinc smelting, in which hot calcine, coke breeze (or powdered coal) and air (or enriched air with oxygen) were injected in molten slag and lead bullion.
The compositions of slag, lead bullion and gaseous phases were calculated and the heat balance in the reaction furnace was obtained under various conditions by using GOTO model. The effects of the reaction temperature, amounts and the compositions of calcine, coke breeze and air, and the degree of the enrichment of oxygen in the air on the compositions of slag, lead bullion and gas, and the heat balance in the furnace were calculated.
It becomes obvious from the calculation that the amounts and the ratios of calcine, coke breeze and oxygen injected in slag per unit time are the important factors for maintaining the constant zinc content in slag without iron precipitation and keeping the constant temperature in the furnace.
In points of energy conservation and energy cost, the optimum conditions were obtained by using hot calcine and nearly pure oxygen.