Ore lithium beryllium (processing of lithium and bervllium ores) isolation and enrichment of lithium from lithium-containing beryllium beryllium mineral ore process. The mineral processing products are lithium concentrate and antimony concentrate. Lithium and antimony concentrates are sent to smelters to extract lithium, antimony or lithium and antimony compounds. The content of lithium in minerals and resources is 6.5×10-3% in the earth's crust. There are about 150 kinds of lithium minerals, and about 30 kinds of lithium-based minerals. Industrially valuable lithium minerals are mainly spodumene (LiAl(SiO6)), lithium mica (KLil.5Al1.5(Si4O10)[F•OH]2), lithium feldspar (Li[Al, Si4O10]), amblygonite lithium (LiAl [PO4] F) and zinnwaldite (KLiFeAl [Si3AlO10] (F, OH) 2) and other five. Among them, spodumene is the most important, accounting for more than half of the total production of lithium minerals. In addition to 4.5% to 8% Li2O, spodumene also contains 0 to 3% Rb2O and 0 to 1% Cs2O. Spodumene often coexists with quartz , feldspar, and mica in granitic pegmatite. The general industrial grade of lithium is 0.9% to 1.1% for Li2O. When hand-selected spodumene, the spodumene content is required to reach 5% to 8%. The world is rich in lithium resources, mainly in the United States, Canada, Brazil, Zimbabwe, Chile and other countries. The content of strontium in the earth's crust is 6×10-4%. There are about 50 kinds of minerals containing antimony. The industrially valuable niobium minerals are mainly beryl (Be3Al2(Si6O18)), gold emerald (BeAl2O4), wollastonite (Be-SiO4) and garnet ((Mn,Fe)8[BeSiO4]6S2). Among them, beryl is the most important. Pure beryl theoretically contains about 14% BeO. The main beryl associated minerals spodumene, lepidolite, cassiterite and niobium tantalum and the like.
The general industrial grade of bismuth is BeO 0.08% to 0.12%. When hand-selected granite pegmatite, the beryl content is required to be 0.2% to 0.6%; when hand-selected slope sand ore, the beryl content is required to be 2 to 2.5 kg/m3. The world beryl is rich in resources, mainly distributed in Brazil, Argentina, India and other countries. China's lithium and thorium resources are also very rich. The process of spodumene and beryl concentrate is produced by pegmatite and granite deposits. Fine-grained lithium ore is mainly sorted by flotation. Heavy medium beneficiation is a promising method for sorting spodumene. In the United States, lithium-containing pyroxene ore larger than 2 mm is sorted by a hydrocyclone, and the medium is made of ferrosilicon and magnetite. Most of the beryl is hand-selected, followed by two flotation processes, acid and alkali. The United States recycles silicon vermiculite and China's recycled gold emeralds are all combined processes. The typical concentrating plant Coco Too Sea Concentrator is located in the Cocotohai Mining Area, Fuyun County, Xinjiang Uygur Autonomous Region, China. It was completed and put into production in 1976. The design scale is 750t/d.
The raw ore used in the production of the Cocoto Sea Concentrator is a granite pegmatite ore containing lithium, strontium and barium . Useful minerals are spodumene, beryl, coltan, fine spar, and the like. The gangue minerals are quartz, feldspar, mica, and the like. The ore dressing plant uses two sections of grinding. The first section is an open rod mill. The ore is discharged into a spiral concentrator and shaker to sort the coltan. The second paragraph is ball milling. The cyclone cascade overflows through slurrying, flotation beryl or spodumene. There are three series of lithium niobium beneficiation. A series of preferentially selected bismuth, lithium separation. The agents used are sodium carbonate, sodium hydroxide, sodium sulfide, ferric chloride, naphthenic acid soap, oxidized paraffin soap and diesel oil. The original ore grade is 0.087%, the tantalum concentrate grade is 7.7%, and the recovery rate is 76.15%. The second and third series are lithium series. The reagents used are sodium carbonate, sodium hydroxide, oxidized paraffin soap and naphthenic acid soap, diesel oil, and sometimes a small amount of calcium chloride is added. The original ore grade is 1.29%, the lithium concentrate grade is 6.23%, and the recovery rate is 87.4%. The scale of the production system is 100t/d. The ore contains (Ta, Nb) 2O5 0.015% (Ta: Nb = 1:1). The two-stage grinding and re-election magnetic separation-flotation combined process is adopted; the antimony concentrate contains (Ta, Nb) 2O 550% to 60%, and the recovery rate is about 62%.
The Klngs Mountain concentrator is located in North Carolina, USA. The plant designed and processed the ore volume to 360t/d and later expanded to 1200t/d. After the ore is broken, the +3.3mm portion is first coarsely selected with the resuspension, and a part of the spodumene concentrate is selected and a part of the tailings is discarded. After the fine-grained portion of -3.3mm is ground and delimed, the heavy mineral is recovered by a spiral concentrator; the tailings enter the flotation. The dosage of flotation agent is CaO0.45kg/t, dextrin 0.23kg/t, amine buffering agent 0.18~0.23kg/li mt, and foaming agent 0.18kg/t. The gangue mineral flotation is carried out under the conditions of pH 10.1 to 11. The obtained foam products are silicate minerals such as quartz, feldspar and mica. The tailings of the flotation are iron-containing and spodumene-containing products, concentrated to a solid concentration of 60% to 75% for the flotation of iron-containing minerals, and the tailings are the spodumene concentrate. The ore contains Li2O 1.4%~1.6%. It uses ferrosilicon as the resuspension medium and is selected in the suspension with the density of 2.9-3.0g/cm3 to obtain the spodumene coarse concentrate containing Li2O 5%~6%. The recovery rate is 25% to 30%; the fine fraction is obtained by flotation to obtain a spodumene concentrate containing 5% to 6% of Li2O, and the recovery rate is 45% to 50%.
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