subject: The Iron Ore Storage Capacity Of China Is Increasing [print this page] The iron ore storage capacity of China is increasing
China's iron ore resources storage capacity is increasing
Chinas beneficiation technology of siderite and limonite and specularite symbiotic mixed ore has reached a very high level. The JISCO concentrator was put into operation in 1972, after 30 years of continuous innovation and scientific and technological transformation, in 2005, ore roasting, the technical indicators of the intensity magnetic separation of iron ore fines production process for ore processing capacity was 534. 04 million t / a , concentrate production was 2,791,700 t / a, ore grade was 36 28% (after dry lump ore pre-selection), iron ore concentrate grade was 53.79% (in which weak magnetic fine 56.26% magnetic fine bit 50. 79qo), metal recycling rate was 77.77%. Jiuquan Steel Group in 2005 made cooperation with Changsha mining and metallurgy institute, do weak magnetic concentrate implementation of the improving quality drop miscellaneous and industrial triage test to Jiu steel concentrator, with GE -609 for cationic collector, go through the rougher once selected, four scavenger reverse flotation, compared with the same period production targets, grade iron ore increased by 40.5 percent, Si02 decreased by 4.65 percentage points, operating up to 93.98% recycling prison; magnetic roughing tailings thickness of the separator, the fine-grained level into the machine for high gradient magnetic sorting, under the premise of constant product quality, improve the fine-grained level recoveries, strong magnetic recovery rate after transformation was improve to 48.0 percent. Expansion and reconstruction was completed in 2007.
China's iron ore resources of Chu King 1/9 oolitic hematite, accounting for China's red iron ore reserves of 300 / e. Oolitic hematite is often the formation of large-scale mining, for example, the north Xuanlong iron ore south of Ningxiang iron ore. Oolitic hematite disseminated fine particle size and wrapped in layers of the structure, not conducive to the monomer cleavage of the ore, and ore crushing and grinding are particularly vulnerable to the formation of fine particles, and clay content big. This smelt the iron ore is very difficult. Oolitic hematite beneficiation, including the the dephosphorization desilication, desulfurization, and anti-flotation process, selectively agglomerate an anti-flotation and high gradient magnetic separator, new equipment and new technologies, the direct reduction method, acid leaching, chlorination roasting an acid leaching process, but the successful enrichment of the reported rarely.
