Fifth grinding wheel plant.
It is located in the east of Lintong County, Shaanxi Province. It is a key enterprise in the machinery industry that was relocated from the fourth grinding wheel factory in Zibo, Shandong Province at the end of the 60s, specializing in the production of silicon carbide products.
On September 7, 1967, the First Ministry of Machinery Industry approved the construction, started construction on September 27, 1968, and was accepted and put into operation on December 30, 1971. In that year, the silicon carbon rod product was officially put into production.
In September 1970, it was transferred to Shaanxi Province by the First Ministry of Machinery Industry.
The factory covers an area of 22150,000 square meters, construction area of 6570,000 square meters;The cumulative investment of the state is 198710,000 yuan, the original value of fixed assets is 130990,000 yuan. The factory has 251 sets of various production equipment, including 29 sets of forging equipment and 47 sets of metal cutting machine tools. It has 15 industrial kilns for silicon carbide smelting and firing products. The annual output is 2,400 tons of black silicon carbide, 3.5 million standard rods of silicon carbon rods, and 1 million carats of synthetic diamond.
In 1989, the total industrial output value was 178070,000 yuan. There are 1,401 employees in the factory, including 73 engineering and technical personnel. The factory has 6 branches such as silicon carbon rod, diamond, silicon carbide, tool and machine repair, and silicon carbide research institute. The main production of "Huanwrigley" silicon carbide and its products, synthetic diamond and its products in two categories, 46 sub-categories, more than 1,000 specifications. The main products are black silicon carbide and silicon carbon rods and electric heating elements, synthetic diamond and synthetic diamond grinding wheels, oil stones, assorted files, reaming drills, dental drills, grinding drills, saw blades and other products. In the past 19 years, a total of 20 new products have been developed, among which the electroplated diamond reaming drill won the National Science Conference Award in 1978Silicon carbide PN junction temperature sensor won the second prize of National Invention Award in 1985Equal diameter silicon carbon rod and synthetic diamond powder won the title of high-quality products in Shaanxi Province in 1985. Since its establishment, the factory has produced a total of 8,995 tons of silicon carbide and 3,943 silicon carbon rods710,000 standard branches, synthetic diamond 452970,000 carats;The total industrial output value is 14401170,000 yuan, realizing profits and taxes of 1768120,000 yuan, 1568 profits and taxes370,000 yuan;The cumulative export earnings are 278060,000 US dollars, the products are exported to more than a dozen countries and regions.
In 1988, the "Fifth Grinding Wheel Factory and Xi'an Jiaotong University Joint Development Center" was jointly established with Xi'an Jiaotong University, and the oxide-bonded silicon carbide sagger was jointly developedFully contracted Lishan Abrasives Factory.
In 1986, the factory was awarded the title of "Provincial Advanced Enterprise" in Shaanxi Province, and was promoted to a national second-class enterprise in 1988.