Qingdao zhida environmental protection smelting equipment limited company was founded in August 1990, is a collection of scientific research, production and sales in one of the high-tech enterprises, the company mainly produces large tonnage (10T/H and above) external hot air long furnace age cupola system, iron intelligent transfer system, automatic pouring machine, foundry smoke and dust treatment system, electric furnace supporting equipment, pouring and supporting equipment (iron bag, ladle bag, Bakeware , electric flat cars), and rock wool/slag wool production lines, etc., are sold at home and abroad. The company has obtained 41 patents, including 4 national invention patents and 37 utility model patents. He has successively presided over drafting revisions or participated in the drafting and revision of 52 national standards and industry standards for foundry machinery, and was rated as “Deputy Chairman Unit of the Smelting and Pouring Sub-Standards Committee of the National Foundry Machinery Standardization Technical Committee” by the China Machinery Industry Federation. Zhongzhida is an industry unit involved in the drafting of international standard terminology for foundry machinery. Currently, there are 2 registered experts of the International Standards Committee for Foundry Machinery, and has been hired as a member unit of the International Standards Committee for Foundry Machinery - China Working Group. Qingdao Zhida Environmental Protection Melting Equipment Co., Ltd. is the drafting unit of the “pouring package design specification” (machinery industry standard: JB/T 12552-2015). It has rich experience in pouring equipment design and manufacturing. The product types include: gray iron bales, ball iron bags, insulation bags, lifting bags, teapot bags, transfer bags, special packages for pouring machines, special steel bags and other metal solution pouring bags. It can produce iron bags with a capacity of 60 tons and steel bags with a capacity of 200 tons.