Molybdenum wire concentrate leaching

Some get a molybdenum concentrate plant, copper, lead, iron and other impurities substandard. High-quality standards of tungsten&moly copper molybdenum by Climax Molybdenum Company of America: MoS2 should be

95%, Cu should be less than 0.15%, Pb should be less than 0.05%. In the international market, quality almost, prices sent many, as the company July 1, 1975 quality molybdenum

Concentrate is priced at $ 2.43 / lb, unqualified to $ 2.236 / lb, the race to 2.5 to 17%. In order to reduce the content of these metals, and some plant using different

The leaching process.
    Brenda plant concentrate containing 55.3% molybdenum grade is relatively high, but the content of copper and lead undesirable. To this end, the plant uses the company developed the Noranda

Leaching process to reduce impurities to improve the quality of concentrate. This process is the principles and methods: copper chloride, ferric chloride leaching of molybdenum alloys oxide and calcium solution of Cu, Ca

And Pb. Cupric chloride and ferric chloride (103 and 41 respectively, the amount of g / t of concentrate) in a sodium chloride solution containing 20 to 30% of the chalcopyrite and galena

Effective chlorinating agent, calcium chloride or sodium chloride to reduce the PH value, and is used to increase the boiling point (located 4850 feet elevation Brenda leaching requires higher boiling point), reduction of

Short leaching time. Brenda most effective plant copper tungsten leaching solution containing 1% of cupric chloride, ferric chloride, 10% and 30% calcium chloride. Leaching at 2 hours at 100 ℃,

Make Cu, Pb leaching rate reached 98%, Ca leaching rate reached 79%, and was dissolved molybdenum is less than 0.5%. Used leachate chlorine gas can be quickly regenerated

. After each batch leaching let go 30% of the leaching solution, in order to control the leaching solution of copper and lead harmful elements. After leaching copper content fell from 0.337% molybdenum concentrate

0.063% lead content to 0.05% molybdenium grade increased from 55.3% to 56.6%. Such concentrates cooling and washed twice (including filtration and recycling pulp) after conduct

The final filtration and drying.
    Valencia Rita plant selection molybdenum concentrate containing 47 to 48% molybdenum, copper contained in order to further remove, to improve the quality, the plant uses a ferrous chloride leaching. Work

Arts process is the first molybdenum was filtered and dried to 2% temperature and then leaching the copper (up to 2.5 to 3.0%), ferrous chloride extract, molybdenum grade to 53 ~ 54%

. After the concentrate leaching and filtered again and dried, and within 2 meters of the roaster roasting ф.16 give trioxide, 60 to 61 percent of its grades, less than 1% sulfur, send

Ferroalloy plant into the preparation of ferro molybdenum. Cologne plant in order to reduce the copper content of molybdenum, using sodium chloride leaching, the product is filtered and then dip the slurry, and then sent to the acid

Dip, to further reduce the amount of copper, molybdenum acid leaching after final filtration and drying.