Anionic polyacrylamide (APAM) is a water-soluble high molecular polymer. It is mainly used for flocculation, sedimentation and clarification treatment of various industrial wastewater, such as wastewater from iron and steel plants, wastewater from electroplating plants, metallurgical wastewater, and coal washing wastewater.

Brown corundum is made of bauxite and coke (anthracite) as the main raw materials. It is smelted at high temperature in an electric arc furnace. The abrasive tools made of it are suitable for grinding metals with high tensile strength, such as various general steels , Malleable cast iron, hard bronze, etc.

Silicon carbide abrasive, also known as moissanite, can also be called emery or refractory sand. It is a man-made substance. It is made by high-temperature smelting of raw materials such as quartz sand, petroleum coke (or coal coke), and wood chips in a resistance furnace.

Garnet abrasive, also known as natural emery, is a silicate mineral. Generally brown powdery particles. After grinding, it can be used as the friction surface of grinding powder, polishing paper, grinding wheel and whetstone. It has a long history of production and use.

Walnut shell filter material is a water treatment filter material that uses high-quality pecan shells as raw materials, which is crushed, polished, steamed, washed, and treated with medicines, and then screened and processed twice.

Citric acid (CA) (CAS No.77-92-9), also known as citric acid, the molecular formula is C₆H₈O₇, is an important organic acid, colorless crystal, odorless, has a strong sour taste, easily soluble in water, is a natural preservative and food additive .