Baoshan beneficiation plant was designed and constructed in 1967, the scale of 350t / d.
(1) Ore properties: Baoshan mining area is a skarn type scheelite deposit. Metallic minerals scheelite, galena, sphalerite, yellow copper ore, pyrrhotite, pyrite, gangue minerals hedenbergite, fluorite, orthoclase, garnet sub-stone, actinolite, chlorite, sericite and kaolin.
The scheelite and sulphide ore are symbiotic, especially in sync with pyrrhotite, and a small amount of monomeric scheelite is produced in quartz . The scheelite grain size is usually 0.1~0.2mm, the larger is 0.6mm, and the minimum is 0.016mm.
Sphalerite is produced in small blocks in skarn fractures and is closely associated with chalcopyrite. The particles are generally 0.24 mm, a maximum of 0.75 mm and a minimum of 0.064 mm. The zinc sphalerite in zinc minerals accounts for about 10%, which is more difficult to choose.
The tungsten minerals in the ore mainly include scheelite (according to phase analysis, scheelite accounts for 87%), and a small amount of tungsten and black tungsten ore. The multi-element analysis of raw ore is shown in the table below
(2) Process flow: broken into three sections and one closed circuit process. The maximum size of the ore is 450mm and the final particle size is 10mm. Grinding is a closed circuit, and flotation is a partial priority flotation. The lead-zinc float tail has “731†oxidized paraffin soap floating scheelite. The selected slurry is not concentrated. Without heating, the slurry is adjusted with sodium carbonate to keep the pH between 8.5 and 9, which is the factory. The characteristics of the production process. The stellite ore flotation process uses two coarse, three sweep, and five fine. The selected scheelite concentrates are all Grade I scheelite concentrates. The symbiotic copper and sulfur useful elements are also recycled in production. The process of the concentrator is shown in the following figure:
The main process indicators, unit consumption indicators and main equipment of the concentrator are shown in the following table:
Features of drag chain leacher:
The material in the material bed is divided into several independent units, could effectively prevent various mixed oil fleeing hither and thither on the bed of material, Can guarantee the concentration gradient between each section of spray.
Form soaking zone in each material cell, can obtain better soaking effect.
Chain box is supported by rail, not contact with the screen surface, make the screen surface live longer.
Adopt international advanced hydraulic motor biaxial drive, Balanced force, reliable operation, less maintenance costs.
More suitable for high oil, high degree of powder materials, ordinary oil material leaching effect is better.
Economic and technical index of drag chain leacher(Take an example of 500T/D)
Steam consumption :≤ 280kg/t Material(soybean)
Power Consumption installed capacity: 320KW
Solvent consumption :≤4kg/t Material(6#solvent)
Residual oil of meal: ≤1.0%
Dregs moisture :12-13% (adjustable)
Solvent content in wet meal ≤500ppm
Urease activity: 0.05-0.25 (Soybean meal)
Leaching crude oil
Total volatiles content: ≤0.30%
Residual solvent content: ≤300ppm
Mechanical impurities: ≤0.20%
Soybean Oil Solvent Extraction,Corn Germ Oil Solvent Extraction,Palm Oil Extraction,Sunflower Oil Solvent Extraction
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