is widely used in permanent magnetic separator magnetic separation process is simple and convenient to use

By stage grinding process, a grinding get -0.074 mm grain size of 70 to 78% of the products, the segment with the magnetic separation process in a process to obtain the corresponding sorting iron,

To 54% and 12 to 16 percent of the mine and tailings. In the second paragraph of the grinding, the ore will be in closed-circuit grinding to -074 mm grain size from 98 to 99%. Three magnetic, non-magnetic portion and the pre-

Enrichment and for the first scavenger. Each sorting results obtained concentrate iron grade of concentrate from the first selected another 59 to 62 per cent in the third elect another 51 to 56%. In that paragraph waste

Abandoned tailings iron grade of 22 to 26 percent. The total content of iron ore is 58 to 61% of the metal ore concentrate on the recovery of 78 to 80%.

    Our country is big iron ore reserves, but the country's iron ore production can not meet the needs of the development of China's steel industry, for the following reasons. (A) large reserves

Can Xuanye less. Although China is the world's iron ore reserves of rich countries, identified reserves of 57.872 billion tons of resources, but for the exploitation of only 200 million tons.

China's iron ore resource types, complex composition, metallurgical performance is poor, less recoverable reserves. In China's iron ore reserves have been identified, about 1/4 of the difficult smelting

Iron ore. (2) low-grade iron ore. More of lean ore iron ore resources, the national average grade of ore below the world average grade of only 31.2 2o percent, and

97.2% of the iron ore for the poor. This determines that China's domestic iron ore production of iron and steel industry can not meet the demand of the situation. (3) uneven distribution of iron ore. Country

Iron ore deposits are widely distributed, but relatively concentrated. Geographic distribution of iron ore has been identified throughout the country 29 provinces, municipalities and autonomous regions more than 660 counties (flag), but in groups, as

With output, display relatively concentrated distribution characteristics. China's iron ore distribution and showing a clear north-south uneven distribution characteristics of iron ore resources and more concentrated in the

North.

     Industry has mastered the fine disseminated oxidized ore flotation and magnetic roasting beneficiation process. These two processes can ensure a satisfactory process indicators. But

Applied in the flotation process chemicals and the magnetization roasting and baking process all affect the ecological environment, and because of the shortage of product is sometimes consumed food products and natural

Gas and significantly improve the cost of the process. Therefore, in the Soviet Union and other countries magnetizing roasting process neither be promoted.

     Magnetic - Floating joint process is the process oxide ore effective technology program. Kerry Tim Rogge and Kursk magnetic ore that the use of such processes to deal with. Flow

The magnetic part of the process with a magnetic separation process and magnetic separation processes Sec choose another main difference is that a grind size. In the United process grind size is approximately 0.044mm

87-92% mineral grinding grain directly to magnetic tool reverse flotation. Flotation process, including roughing, scavenging and four selected operations.

     Weakly magnetic iron ore production for the future development of potential feedstock is important, because in many countries this type of ore reserves greatly. Wider

The necessity of the use of this mineral ores but also because they are often together with magnetite ore was mined out, and hidden mine geological conditions are good. Weakly magnetic iron ore

Optional stone very different. Native hematite and siderite iron ore lump and coarse belong disseminated ores, with ordinary re-election process sorting can be achieved fairly high

Process indicators.

    After selection, the front ndfeb magnet of the mine in order to return to work. Selection and sweep the election of a product is returned to the tank and then to the hydrocyclone regrinding. Eligible for concentrated concentrate

Condensation and the disc vacuum filter through this machine, run-off and the filtrate was concentrated to return. To obtain recycled water, flotation tailings are concentrated, recycled water together with the concentrate thickener overflow

And, the return flow. Flotation reagent system with the following, kg / t ore magnetic medium: crude tall oil a 0.2; concentrated pulp waste -1.3; caustic soda a 0.9; lime -1.6; poly

Propylene ether amines a 0.06 Pharmacy fed into roughing, scavenging and selected gnaw industry. Lime and then fed into the polyacrylamide concentration and filtration.