Guizhou Dazhong No. 7 Grinding Wheel Co., Ltd. (formerly China No. 7 Grinding Wheel Factory) was established in 1967. The factory covers an area of ​​more than 800,000 square meters and produces 100,000 tons of brown corundum abrasives and refractory materials annually. It is the largest brown corundum abrasive manufacturer in China and even Asia. The smelting equipment adopts advanced dump smelting electric furnace, and the granulation adopts large gas-fall medium-free self-grinder, Bamak, V-type mill, counterroller and other crushing equipment. Register the "Shanpai" trademark. Shan Brand Brown Corundum Series Abrasive Products have been recognized by the industry as a symbol of high quality. Main products: brown corundum ceramics, resins, and steel ball special abrasive series; semi-brittle corundum consolidation and coating abrasives series; investment precision cast sand cast sand series; calcination and plating based abrasive series; refractory section sand series, etc. .

The company actively participates in the work of industry associations and the revision of product standards of the Standards Committee, and is responsible for drafting and compiling GB/T 2478, GB/T4676, GB/T9258, GB/T9258, GB/T9258, JB/T1189, JB/T 6569, etc. National standards and industry standards, participate in the drafting of GB/T 2481.1, JB/T7998 and other standards.

The company has gone through nearly 50 years of practice and continuously improved and improved through several generations of efforts since the 1960s. It now has 3500, 4000, 5000, 6300, 7500KVA dumping type with different powers. Brown corundum smelting furnace. Production is made using different smelting equipment for different product uses. Due to the long smelting time of the company's 3500~4000KVA smelting furnace, it is conducive to the adjustment of the furnace condition, sufficient material reduction and good product stability. The product has excellent properties such as high density, high hardness, and high toughness. It mainly produces brown corundum, semi-crunchy corundum, etc. for abrasives. The abrasive tools are characterized by high cutting force, low grinding heat, good self-sharpness and beautiful color. Brown corundum is especially suitable for making high-end ceramic abrasives. 5000~7500KVA smelting furnace smelting is mainly used to produce brown corundum refractory materials products because of its short smelting time and high production efficiency.

The granulation equipment mainly uses the ф4200 self-grinder, which is the largest, advanced, energy-saving and environmentally friendly world-class abrasive industry in today's world. The crushing capacity is 13 tons/hour, the crushing ratio reaches 5,000, which is dozens of times higher than that of ball mills and rod mills, and has two functions: crushing and grinding. It uses the broken corundum itself as a medium to achieve corundum crushing through mutual impact and grinding, also known as a medium-free mill. It integrates crushing, plastic surgery, air selection and dry cleaning functions. The shape of the product particles is mostly equal in size, and the product is pure and free of impurities.

Shanpai Brown Corundum Abrasive is a high-quality bauxite unique to Qingzhen, the factory located. It uses unique smelting technology to melt in a pouring arc furnace. It is crushed by medium-free self-grinding machine, bamake, rolling machine, etc., and is selected by magnetic selection. , boiling dry cleaning, fine screening, and manufacturing special abrasives and high-end refractory materials for various abrasives in Shan Brand. For fifty years, the physical and chemical indicators of Shanpai products have always adhered to enterprise internal control standards that are higher than national standards, and have always attached importance to and maintained quality stability.

The company has more than 100 engineering and technical personnel of various types. Strictly implement ISO9001, GB/T19001 quality system standards and product internal control quality standards. It has a physical and chemical laboratory with advanced facilities to conduct chemical analysis and physical testing of raw materials and products. Strict and effective quality control is implemented from raw materials to shipment to ensure product quality.