Abstract: A device and a method for producing a high-purity industrial silicon, wherein the device is a refining ladle provided with a steel plate layer, a heat insulation layer, a heat preservation layer, a protective layer and a working layer from outside to inside. The refining ladle is provided with two conical oxygen inlet channels and two conical argon inlet channels at the bottom. The method comprises: preparing a molten silicon with temperature?2200° C.; pouring the molten silicon into a refining ladle after introducing oxygen and argon thereto and keeping the gas pressure at 1 standard atmospheric pressure, and keeping the molten silicon at 1700-1900° C.; adding a slag-forming agent thereto, and introducing oxygen and argon from the refining ladle bottom, obtaining a slag molten silicon; cooling the slag molten silicon to ambient temperature, solidifying and separating, obtaining a high-purity industrial silicon.

Abstract: A glass ceramic and a preparation method thereof include a step of melting calcined electrolytic manganese slag to obtain molten glass. The molten glass is sequentially molded, nucleated, and crystallized to obtain the glass ceramic. The calcined electrolytic manganese slag is taken as a raw material, so that harmful gases are not generated in the raw material melting process, and secondary pollution is not caused. The preparation method provided by the present invention has the advantages of simple operation, high utilization rate of electrolytic manganese slag and low cost. Moreover, the prepared glass ceramic has good mechanical properties and corrosion resistance.