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Project Case
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The tungsten ore dressing equipment and process
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- Commodity name: The tungsten ore dressing equipment and process
- Commodity ID: 1113782268548763648
Tungsten ore content little tungsten,it must be integrated to mineral rich concentrate as raw material for smelting.According to the ore types,tungsten mineral processing can devide into wolframite tu
Tungsten ore content little tungsten,it must be integrated to mineral rich concentrate as raw material for smelting.According to the ore types,tungsten mineral processing can devide into wolframite tungsten dressing and scheelite tungsten dressing.In the present stage of our country mining in quartz vein wolframite,accounting for above 90% of the amount of ore mined.Main processing method of tungsten mine has hand selected,heavy medium separation,gravity separation,flotation, magnetic and electrostatic separation.Gravity separation for wolframite,flotation separation for scheelite.The wolframite is the most easy ore types,while the composition of scheelite ore is complex,most composition are hard dressing ores, coupled with low grade,so there is no large numbers to develop.In addition, there are tungsten oxide tungsten in China, is also not recycle.Tungsten dressing in our country,the large-scale plant started in 1952 in Dajishan Tungsten Deposit is established with 125t/d gravity concentrator, in the late 1950s.By Research Design Institute of the former Soviet Union Michal noble Dajishan,West Huashan and Kuimeishan tungsten design of three big types tungsten selected plant have been completed and put into operation.Over the past 40 years,in the production practice,summarize experience constantly,and absorb foreign advanced technology, continuous the improvement,so that the processing process is getting better and better,the mineral processing technology economic indicators have reached the world advanced level.Such as a representative of the Nanchang nonferrous metals company of tungsten ore beneficiation indexes, although in recent 10 years in the grade of ore decreasing year by year, tungsten recovery rate remained at high levels in more than 84%, concentrate grade(WO3)from 66.7% to 68.9%(achieve to one,two level tungsten concentrate national standards:WO3 content not less than 65%), ore grade(WO3)0.25% ~ 0.27%, tailings grade (WO3) 0.036% ~ 0.046%.Tungsten smelting method has fire and water smelting.Use wolframite concentrate or white tungsten concentrate smelting,but due to the smelting process is different.When the mineral deposit has wolframite and scheelite,to delineate the orebody respectively,calculate reserves separately.When the wolframite and scheelite coexist together,to select scheelite and wolframite separately, respectively for smelting.Tungsten concentrate as a tungsten smelting mineral raw material, containing WO3 should reach or greater than 65%. After smelting by fire into ferrotungsten (W>70 or >65%);after smelting by water into sodium tungstate, ammonium paratungstate or calcium tungstate etc.. Finally, further processing into tungsten oxide(WO3 content is not less than 99.9%), then use the deoxidizer (use hydrogen) change into tungsten powder (containing W is more than 99.9%).
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