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Spiral chute effective sorting hematite, tantalum and niobium ore, Yi is selected from tin ore, which has been proven production practice. However, it can be used in the selection of difficult-to-select vein tin tailings with small difference in mineral gravity and embedded grain size, which is still rare in production. Recently, the FRP Oven spiral chute produced by Jiangxi Shicheng Shaker Machinery Plant in Guangdong Binggangshan Tin Mine has selected its tin tailings, which has achieved remarkable results.
The collapsed mountain tin mine belongs to the iron cap type refractory tin mine. The main gangue minerals are limonite, hematite, quartz and weathered silicate minerals. Most of the tin ore in the tin ore is present in the voids or gaps of iron oxide and iron hydroxide. The output grain size is generally 0.09 to 0.02 mm. The beneficiation plant using a single sorting shaker ungraded, resulting in poor recovery of mineral tin 0.074 to about 0.05 mm size fraction, -0.05 mm cassiterite substantially no monomer recycling, synthesis tailings grade tin generally above 0.6%, the result is metal loss and waste of resources, economic impact mine. As further improvement of the process and the addition of equipment require many investments as conditions, the mine has only spent thousands of dollars to purchase spiral chutes to re-select the mine tailings, which is satisfactory. The glass fiber reinforced spiral chute has a diameter of 900 mm, is installed at both ends, has a lateral inclination of 9 degrees, a pitch of 540 mm, a feeding ore size of 0.3 to 0.025 mm, a ore concentration of 30% to 45%, and a treatment capacity of 0.6 to 1.5 tons per hour. After sorting by spiral chute, the crude concentrate with tin grade of 1.90%, yield of 11.62% and recovery of 32.5% can be obtained, and then selected by shaker, magnetic separation and floating sulfur, the tin grade can be obtained as 47.26%. Tin concentrate. According to the monthly processing of 480 tons of tailings, the monthly output of concentrates is 1.1 tons, and the monthly output value is 14,000 yuan. After deducting the total cost and taxes, the net profit is 6,918 yuan. The equipment investment and surcharges can be fully recovered in the month and more than enough. The annual profit of a spiral chute can reach more than 70,000 yuan.
The outstanding feature of the spiral chute is that the structure is extremely simple and the sorting performance is excellent, no power is required, the operation is simple, the investment is small, and the horse is fast. The treatment of tailings does not require mining costs, which is faster and more efficient. Especially for local small and medium tin mines, it is a powerful means to improve indicators and improve efficiency.
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