Concentration pulp with high temperature is common method. First, the pulp is concentrated to 60%-70%; the next, sodium silicate is added into pulp; then, the pulp is heated to 80℃ and stirred for 30-60min; the last, it is diluted with water. The floatation of scheelite is under the room temperature, and the product in tank is calcspar & fluorite.
It is difficult to separate scheelite and barite by sodium silicate because of the closed inhibitory action for scheelite and barite. We choose alkyl sulfate as collector to repeatly select barite under the 1.5-3PH, and the product in tank is scheelite.
Xanthate is used to capture sulfide minerals in scheelite floatation. We add a little oxide and sodium sulfide to inhibit sulfide without floatation.
Oleic acid as collector and sodium silicate as inhibitors, which could inhibit the quartz and silicate gangue and float scheelite.
It interfered the scheelite floatation index for complex composition, fine particle size of distribution and containing fluorite and other mineral rich of Ca & Fe. The dressing plant takes the processing: one roughing, four cleaning and two scavenging, but the final grade of scheelite was not high only 55%. So they authorize Xinhai to do technical reconstruction. Xinhai decided to use centrifugal flotation process after analyzing the properties of ore, the detailed index comparison as follow
|Comparison of Reconstruction||Process||Concentrate Grade/%||Recovery Rate/%|
|After Reconstruction||Centrifugal Flotation||62.59||93.26|
After the reconstruction, it obviously strengthens the recovery of fine particle and reduces the effect of mud on the separation process. The recovery index becomes better realizing the comprehensive recycling of resources.
"Providing comprehensive mining development solutions, manufacturing mining machinery products with advanced technology, environmental protection, high efficiency and energy saving technology, and achieving maximization value for global mining customers."
"Based in China, Xinhai wants to be one of world top developers, manufacturers, service providers and engineering contractors of mining technology and mining machinery."
1,200T/D GOLD PROCESSING PROJECT OF BULSOWA IN TANZANIA
1,200t/d mineral processing plant of Bulsowa in Tanzania was an EPC project contracted by Xinhai, Xinhai provided thickening, leaching, desorption.
Species : gold ore
Process : adopts all-slime cyanidation process with thickening, leaching and desorption electrolysis process, dry tailings stacking