等离子体制取ZrO_2在连铸中间包的应用

Production of ZrO_2 by Plasma and Its Application on Tundish

在150kW的等离子体装置中,制取出脱硅锆(88.60％～96.90％ZrO_2)和稳定型氧化锆(ZrO_2≥91.54％,MgO≤5.39％)。研究了温度、时间和配碳量等因素对去除锆英石中SiO_2的影响规律。用脱硅锆代替化学提纯法生产的纯氧化锆,试制了连铸中间包用的定径水口(75％ZrO_2)产品,经使用,已能满足工业生产的要求。

The production of desilicated zirconia (ZrO2 = 88.60%-96.90%) and stabilized zirconia (ZrO2≥91.54%, MgO≤5.39%) was successfully carried out in a plasma facility of 150kW. Factors, such as temperature, time and charge carbon, which affect the removal of silica from zircon were also studied. The desilicated zirconia can be utilized as the replacement of zirconia being made by chemical purifying method to produce the unchangeable diametric tundish nozzle (75%ZrO2) for the use of continuous casting, according to the preliminary examination by steel works , the main characteristic values of this trial-product can meet the requirements of industrial production.