Auxiliary materials are essential components used in various industrial processes, including manufacturing, construction, and engineering. These materials play a supporting role in the production process and are often used as additives or supplements to improve the quality and efficiency of the final product.

Precast pieces are preformed concrete elements created in a controlled environment and transported to construction sites for installation. These pieces are designed for specific structural or architectural uses, such as walls, columns, beams, and facades. 

Refractory equipment utilizes high temperature-resistant materials and insulation to contain and control extremely hot substances during industrial processes. Refractory materials like aluminum oxide, magnesium oxide, and silicon carbide can withstand temperatures of over 1000°C without damage. They are formed into refractory bricks, castables, and cements for lining furnaces, kilns, incinerators, and reactors. Refractory equipment depends on the careful selection and application of refractory materials based on the specific temperature, environment, and material being handled.

Metal silicon smelting is a high-temperature process that plays a vital role in the production of various alloy materials used in industries such as construction, electronics, and transportation. The process involves the reduction of silicon dioxide with carbon in a furnace, resulting in the production of metal silicon.