Resources,development,status,b business, insurance Resources development status of boron in China
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AlthoughChinese boron resources is abundant, boron products is far from being able tomeet the demand of Chinese economic development. According to 2007 statistics,Chinese boron production is 145,000 tons, the borax production is about 400,000tons, 648,700 tons of imported boron products, a huge gap between supply anddemand. Especially through many years of constantly mining, the rich ore ofboron resources mining has been exhausted, and resources toward taste depletedresources depleted stage. Chinese boron industry take advantage of the oreszaibelyite borax and boric acid as raw materials to produce low-grade boronresources, such as boron, magnesium, iron boron content in the ore is low, alot of impurities, and most have not yet been developed and utilized .The world's boron resources are abundant,but not many countries with boron resources, according to the 2008 statisticsshow that the world boron reserves is about 170 million tons, about 410 milliontons of reserve base, Turkey, Russia, the United States and China. Thecountry's reserves account for about 97% of the world's total reserves. Chinesereserves and reserve base is respectively 25 million tons and 47 million tons, accountingfor 14.7% and 11.5%, in the fourth place in the world.Currently for Separation of paigeite mainlyhave the following aspects: the conventional separation process, the wetseparation process, pyrometallurgical separation process. Conventionalseparation process is the nature of the ore using conventional beneficiationprocess for re-election, magnetic separation, flotation and other minerals forsorting in boron material.Wet separation process mainly deal with theboron-containing iron ore concentrate the magnetic separation process, usingacid leaching extraction of boron, the leaching residue of iron ore concentrateby magnetic to make ferroboron separate. The characteristics of wet separationprocess is to be fully utilized in each of the elements in the ore, boronthorough separation of iron, high acid consumption, high production costs, processwaste water difficult to be disposed, environmental issues are difficult toresolve.In contrast to wet separation process,pyrometallurgical separation process is firstly ironmaking then the boron, theprocess is divided into the blast furnace method and solid phase reduction -melt separation. The scientists based on the chemistry of ludwigite, themineral structure characteristics, come up with the furnace method to comprehensivedevelopment ludwigite process, first through beneficiation to get boron-containingiron ore concentrate, in 13m blastfurnace to do the iron boron separation test, handled a total of ore 8,000 tons,produce borax, boric acid, boron-containing pig iron and a water magnesiumsulfate products. Solid phase reduction - melting separation method is ore ofludwigite or after tailing out processing ludwigite, use non coking coal in thesolid state at about 1100 reduce 80% to 90% of iron oxide to metallic iron. The ore afterrestored through magnetic to get magnetic products which containing iron metal andboron oxide slag, and then by electric furnace melting separation, get the boron-containingiron or boron-half steel and high activity of boron-rich slag, the recovery of ironand oxidative boron was greater than 95%; according to the surveys by metalpowder supplier boron-containing iron used in the fields of machinery,metallurgy, chemicals, building materials, agricultural and so on, can replace thehigh prices of boron-iron alloy, chromium, molybdenum, nickel metal. More than20% of boron oxide content in the boron-rich slag can be used to produce boricacid and borax.Source:http://www.mhcmp.com Article Tags: Chinese Boron, Boron Resources, Boric Acid, Million Tons, Separation Process, Boron-containing Iron
Resources,development,status,b