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Changsha Research Institute of Mining & Metallurgy

Changsha Research Institute of Mining & Metallurgy (CRIMM), founded in 1955, was successively subordinate to Chinese Academy of Science, the Commission of Science, Technology and Industry for National Defense and the Ministry of Metallurgical Industry. CRIMM was converted into a large-scale S&T enterprise directly under the central ministries on June, 1999. CRIMM is a national innovation pilot enterprise defined by the Ministry of Science and Technology, the State-owned Assets Supervision and Administration Commission and All China Federation of Trade Unions.

Project Profile

CRIMM Electric Flotation Machine: It can be widely used in papermaking wastewater, iron and steel wastewater, oily wastewater, food wastewater, urban sewage and other wastewater treatment. This machine has been used in de-ink waste water treatment in paper mill, printing and dyeing waste water treatment in textile mill, white water treatment in paper mill and waste water treatment in livestock factory, etc., and has obtained good purifying effects. It is a novel water treatment (solid-liquid separation) machine developed by Changsha Research Institute of Mining and Metallurgy. Special non-insoluble electrodes are used with water electrolyzed at low voltage, which will produce hydrogen and oxygen whose diameter is only 20-50 microns. Loading of the generated bubbles is large which has the efficacy of flotation, flocculation, oxidation reduction and sterilization. The machine combines “flowing film” water feeding with “shallow pool” structure to optimize water movement, which can shorten separation distance between slag and water, improve processing rate and separation effect of the machine significantly and overcome the disadvantages of easy blinding, low processing rate and high energy consumption of conventional flotation machine.

Zhu Chao-ying, Professorate Senior Engineer
Address: No.966, Lushan Road (South), Changsha City, Hunan Province
Postcode: 410012
Tel: 0731-88657045
Fax: 0731-88657045
E-mail: zcy-1964@163.com
Website: www.crimm.com.cn