Iron ore beneficiation technology development direction
Wednesday, March 19, 2008 in mining news
1 Refractory iron ore beneficiation technology
Limonite rich in crystalline water, use physical grade iron ore beneficiation methods difficult to reach 60 percent, but due to burning Roasting will greatly increase the iron grade, limonite in the grinding process in the phenomenon of serious mud. Separating the low metal recovery. To further enhance Jiangxi Tit Hang iron ore beneficiation indicators, the Ma On Shan Institute of High magnetic mines - anti-flotation new technology research, using high-intensity magnetic separation was rough concentrate, strongly magnetic anti-flotation concentrate into further impurity removal operations, grade iron ore to 56.73 percent. Recovery was 58.52%. Frog Chan, such as Guangdong for a different Limonite a pilot programme of the flotation process, and ultimately using cationic desiliconization flotation process. Process parameters in better conditions. Closed Circuit received concentrate grade of 59 percent and above, iron recovery of 84% of the good indicators. Liyongcong using flotation, re-election, magnetic separation and processing methods, such as roasting magnetic separation of Xinjiang into a Limonite line were studied. The results show that the magnetic separation process will be baking iron ore grade 59.12%, 92.19% for the recovery of the technical indicators. Wang Yuhua against a Limonite flotation process using a single anti-sorting on the desliming, single cation and anion-cation such as joint technical programme on the impact of anti-flotation indicators. The results show that. By adding new cationic surfactant DTL desliming, lime mineral containing silicon activation, inhibition of starch iron minerals, oleic acid and 12 amine joint use of the new programme, a good indicator: 57.18% iron grade, recoveries 74 .9%.
China siderite more abundant resources, has proved reserves of 1.834 billion t. Siderite low-grade iron, mining, ore, smelting both difficult and mostly located in Shaanxi, Shanxi, Guizhou, Gansu and Qinghai dry western region, in particular the need to develop its natural conditions for the mineral processing technology. Siderite theoretical lower grade iron, calcium and magnesium and manganese were often isomorphism symbiosis with physics grade iron ore beneficiation methods difficult to achieve more than 45 per cent, due to burning calcination grade will greatly increase. Sunbingquan of TISCO Ekou Iron iron ore tailings carbonate minerals in the recovery were studied using high-intensity magnetic separation flotation joint screening process, the final grade of iron ore for more than 35 per cent (after baking iron grade of 51% above). Luo Liqun such as Shaanxi Xigou siderite ore was studied, the results showed that the application of magnetic roasting neutral natural cooling remote dry magnetic separation technology, will be roasted at 700 ℃ for 70 min before the mine closed cooling roast to 400 ~ 300 ℃ and then discharged into the air cooling to room temperature, can be formed strong magnetic magnetite and γ-Fe203, ore roasting process test the magnetic separation concentrate iron grade 59.56% to 59.37%, iron recovery of 72.03% to 73.72% of the good indicators.
Oolitic hematite-containing fine granularity cloth and often with siderite, inspectors phosphorus minerals chlorite and mutual symbiosis or parcels, is the most difficult election of iron ore types. Another feature of this iron ore is usually high phosphorus, ranging from 0.4% to 1.1%, some higher. Statements and others were used by fixed and mobile bed, including the heating and the heating method of Guizhou-Chek Hezhang inspectors the direct reduction of iron ore - magnetic separation tests, direct reduction could change its phase from iron oxide change can be weak Magnetic Separation of metal iron ore will be the micro-structure of the inspectors into a coarse granularity of the granular structure for sorting create conditions for recovery. Tongxiong referred to a new process of a getting-to Xuanye hematite recovery, a significant reduction in the cost of circumstances, the iron ore concentrate grade and recovery of 55.62% and 41.51%.
2 pre-selection technology
Steel Group 2004 in Ma On Shan Institute of Mining Research with the German company KHD Humboldt Weidake village high on the low-grade iron ore Magang a high-pressure roller mill semi-industrial test and roller mill products Sorting Test. 0 ~ 3 mm on the grade of 26.27% of the roller mill products Magnetic pre-parabolic tail, in addition to pre-parabolic yield 47.80%, the grade of 8.3 l per cent of eligible tailings. Jiuquan Iron and Steel Company by the United States Outokumpu's high intensity magnetic separator, the lump ore pre-parabolic tail, iron grade to be raised 3.08 percentage points, throwing the end of the yield of 14.28%. Changsha Research Institute of Mining and Metallurgical the DPMS high intensity magnetic separator, the election plant was also more than the application. Ma On Shan Institute of Mining Research developed coarse PM roller-Separator in Meishan mining company, Sichuan Dong Ditch silver mining company full access to the application.
Conclusion
At present, China's economic development is seriously restricted by resources. Science and the development of China's mining industry, and rational utilization of mineral resources, the efficient use of resources, lies in the advancement of technology. Iron and steel industry in the country show the economy plays a vital position, iron ore resources, efficient use of processing workers should be an arduous task. Over the years the relevant institutions and the domestic mining enterprises in this regard, has made a lot of work: Mineral Processing Technology in magnetite, hematite mineral processing technology has made many achievements, as the weak magnetic field of magnetic separation equipment and technology in the anti-flotation Iron Concentrate quality of descending played a great role in the use of depleted iron ore resources has achieved certain progress in improving the quality of iron ore grinding at the same time improving the utilization of mineral resources depleted. The future, we need to be strengthened Refractory iron ore complex in the use of resources, iron ore resources in order to achieve the overall increase use of technology.
Limonite rich in crystalline water, use physical grade iron ore beneficiation methods difficult to reach 60 percent, but due to burning Roasting will greatly increase the iron grade, limonite in the grinding process in the phenomenon of serious mud. Separating the low metal recovery. To further enhance Jiangxi Tit Hang iron ore beneficiation indicators, the Ma On Shan Institute of High magnetic mines - anti-flotation new technology research, using high-intensity magnetic separation was rough concentrate, strongly magnetic anti-flotation concentrate into further impurity removal operations, grade iron ore to 56.73 percent. Recovery was 58.52%. Frog Chan, such as Guangdong for a different Limonite a pilot programme of the flotation process, and ultimately using cationic desiliconization flotation process. Process parameters in better conditions. Closed Circuit received concentrate grade of 59 percent and above, iron recovery of 84% of the good indicators. Liyongcong using flotation, re-election, magnetic separation and processing methods, such as roasting magnetic separation of Xinjiang into a Limonite line were studied. The results show that the magnetic separation process will be baking iron ore grade 59.12%, 92.19% for the recovery of the technical indicators. Wang Yuhua against a Limonite flotation process using a single anti-sorting on the desliming, single cation and anion-cation such as joint technical programme on the impact of anti-flotation indicators. The results show that. By adding new cationic surfactant DTL desliming, lime mineral containing silicon activation, inhibition of starch iron minerals, oleic acid and 12 amine joint use of the new programme, a good indicator: 57.18% iron grade, recoveries 74 .9%.
China siderite more abundant resources, has proved reserves of 1.834 billion t. Siderite low-grade iron, mining, ore, smelting both difficult and mostly located in Shaanxi, Shanxi, Guizhou, Gansu and Qinghai dry western region, in particular the need to develop its natural conditions for the mineral processing technology. Siderite theoretical lower grade iron, calcium and magnesium and manganese were often isomorphism symbiosis with physics grade iron ore beneficiation methods difficult to achieve more than 45 per cent, due to burning calcination grade will greatly increase. Sunbingquan of TISCO Ekou Iron iron ore tailings carbonate minerals in the recovery were studied using high-intensity magnetic separation flotation joint screening process, the final grade of iron ore for more than 35 per cent (after baking iron grade of 51% above). Luo Liqun such as Shaanxi Xigou siderite ore was studied, the results showed that the application of magnetic roasting neutral natural cooling remote dry magnetic separation technology, will be roasted at 700 ℃ for 70 min before the mine closed cooling roast to 400 ~ 300 ℃ and then discharged into the air cooling to room temperature, can be formed strong magnetic magnetite and γ-Fe203, ore roasting process test the magnetic separation concentrate iron grade 59.56% to 59.37%, iron recovery of 72.03% to 73.72% of the good indicators.
Oolitic hematite-containing fine granularity cloth and often with siderite, inspectors phosphorus minerals chlorite and mutual symbiosis or parcels, is the most difficult election of iron ore types. Another feature of this iron ore is usually high phosphorus, ranging from 0.4% to 1.1%, some higher. Statements and others were used by fixed and mobile bed, including the heating and the heating method of Guizhou-Chek Hezhang inspectors the direct reduction of iron ore - magnetic separation tests, direct reduction could change its phase from iron oxide change can be weak Magnetic Separation of metal iron ore will be the micro-structure of the inspectors into a coarse granularity of the granular structure for sorting create conditions for recovery. Tongxiong referred to a new process of a getting-to Xuanye hematite recovery, a significant reduction in the cost of circumstances, the iron ore concentrate grade and recovery of 55.62% and 41.51%.
2 pre-selection technology
Steel Group 2004 in Ma On Shan Institute of Mining Research with the German company KHD Humboldt Weidake village high on the low-grade iron ore Magang a high-pressure roller mill semi-industrial test and roller mill products Sorting Test. 0 ~ 3 mm on the grade of 26.27% of the roller mill products Magnetic pre-parabolic tail, in addition to pre-parabolic yield 47.80%, the grade of 8.3 l per cent of eligible tailings. Jiuquan Iron and Steel Company by the United States Outokumpu's high intensity magnetic separator, the lump ore pre-parabolic tail, iron grade to be raised 3.08 percentage points, throwing the end of the yield of 14.28%. Changsha Research Institute of Mining and Metallurgical the DPMS high intensity magnetic separator, the election plant was also more than the application. Ma On Shan Institute of Mining Research developed coarse PM roller-Separator in Meishan mining company, Sichuan Dong Ditch silver mining company full access to the application.
Conclusion
At present, China's economic development is seriously restricted by resources. Science and the development of China's mining industry, and rational utilization of mineral resources, the efficient use of resources, lies in the advancement of technology. Iron and steel industry in the country show the economy plays a vital position, iron ore resources, efficient use of processing workers should be an arduous task. Over the years the relevant institutions and the domestic mining enterprises in this regard, has made a lot of work: Mineral Processing Technology in magnetite, hematite mineral processing technology has made many achievements, as the weak magnetic field of magnetic separation equipment and technology in the anti-flotation Iron Concentrate quality of descending played a great role in the use of depleted iron ore resources has achieved certain progress in improving the quality of iron ore grinding at the same time improving the utilization of mineral resources depleted. The future, we need to be strengthened Refractory iron ore complex in the use of resources, iron ore resources in order to achieve the overall increase use of technology.
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