China grinding media remodeling has been top level
China grinding media remodeling has been top level
To analyze the change of grinding mill consumption per unit of China’s iron ore concentrator from 1986 to 1995, it is easy to see that it dropped O l7 kg / t. Calculated as 246 million tons in 1995 iron ore production for China’s iron ore concentrator ball consumption of steel by 41 860 t. Value of 1.2558 billion yuan. During this period due to the iron ore concentrator emphasis on reducing consumption of steel, generally carried out the testing and promotion of the grinding media, has made great achievements. , Anshan Iron and subordinate concentrator 1986 to 1995 10 years, average ball consumption decreased by 023%; especially Donganshan the concentrator ball consumption decreased most significant, are shown in Table 53-6. To sum up 1981 and 1995, the progress of the grinding media has taken two big step First, forging, casting, heat treatment, a significant reduction in the unit consumption of grinding media; the implementation of low-chromium alloy the low quality of ball gradually out of the market.
10 years in the late 20th century to the early 21st century. A large number of annual handling capacity of below 500 000 t of small iron ore dressing plant growing generally abandoned the concept of grinding media cost-effective, energy saving affect the iron ore concentrator. However, China’s former subordinates focused on iron ore concentrator still insist on the use of high-quality grinding media for many years and new varieties of research, development and promote the use of the dominated. Mainly in the following aspects. Iron ore beneficiation factory of Angang Group mining company Qidashan from the United States with three large grinding equipment, ball mill size of φ5 49 m × 8.83 m ball mill 6, is the nation’s largest mill. Order to reduce the grinding media consumption, further improve the grinding efficiency, Anshan Iron Mine wear-resistant materials, the company developed a low-chromium Alloy cast iron segments, and industrial test in Qi Dashan iron ore beneficiation factory. The grinding media compared with the rolling ball, grinding media consumption dropped 0 194kg / t. And lower cost, tons of ore grinding media costs by 0.56 yuan. April 2000 passed the technical appraisal of Liaoning Province Science and Technology Commission and the Economic and Trade Commission. Benxi Iron and Steel Group Mining Company in 1999, the Waitoushan Iron TQ’s new anti-wear cast iron ball φ3200 mm x4500 mm overflow milled surface of the industrial test. TQ’s new anti-wear cast iron ball with the Mn-containing cast iron ball, ball consumption to reduce the rate of 15.2 , 17%. 29c / o.
Shougang Mining Company over the years for some ball mill has been used billet production of Shougang 97 mm substandard the ordinary φ127m ball. After several improved wear resistance of the ball, but due to poor billet material, the 1998 ball consumption of 0.99 kg / t, nearly l-fold higher than the domestic advanced level. Shougang Corporation for the continuous casting billet rolling process transformation, processing ball materials will be finished billet 97 mm substandard billet is changed to 120 mm, facing the ball prices to rise. In this context, the Shougang Mining Company, organized in the old waterworks concentrator plant bainite ball and ball industrial production and application tests. Bainite ball with ordinary ball, ball consumption decreased by 0 67 kg / t to 0.45 kg / t, lower 0.22 kg, / t,. And did not appear cracked and peeling, with a high hardness, toughness, good wear resistance, and loss of roundness characteristics. In the shape remodeling of grinding media, since we launched rod ball (also known as the column ball capsule ball) in 1983, the rod mill has had a wide range of application in the second and third sections of the iron ore concentrator ball mill. The remodeling of grinding media in China has gone ahead at the international forefront.
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