Fine-grained tantalum and niobium ore flotation

The No. 69 ore body in the Dajishan tungsten deposit in Jiangxi Province is a large-scale strontium- tungsten-rich granite ore body. The size of the strontium iron mineral in this ore is very fine, and most of the grain size is 40-74 μm. Therefore, the conventional re-election method is adopted. The recovery rate of ore dressing is low, and the recovery rate of strontium is only 25% to 33%. We use the heavy-floating combined process to recover the strontium minerals. When the flotation feeds Ta ₂ O ₅ 0.0145%, the flotation concentrate yield is 0.7%, the concentrate contains Ta ₂ O ₅ 1.8%, and the ruthenium recovery rate is 87%. The concentrate enrichment ratio is more than 100 times. Then re-select the enrichment and separate the antimony and tungsten from the water. The recovery rate of smelting and smelting is 44%.
The ore properties of the Baiyun Obo mine in Baotou are very complicated. Especially the niobium minerals are famous for their poverty, fineness and miscellaneous selection. We use the flotation method to enrich the rare earth flotation tailings with niobium minerals, using Pb(NO ₃ ) ₂ As an activator, D-1 is an inhibitor of calcium minerals, a combined collector mainly composed of hydroxamic acid, which is subjected to flotation flotation in a medium of pH 6, and after desulfurization by flotation-enriched coarse ore concentrate, The weak magnetic-shaker process is selected to obtain rich iron concentrate and iron concentrate. Fushun Iron Concentrate 1 contains Nb ₂ O ₅ 1.66%, Concentrate 2 contains Nb ₂ O ₅ 0.59%, and the total recovery of rhodium is 35.58%. After Chen Quanyuan et al. studied the rare earth flotation tailings in the Bayan Obo mine, it was proposed that after the concentrated desilting of the rare earth flotation tailings, the oxidized wax soap, water glass anti-floated fluorite and residual rare earth minerals were added, and the products in the tank were concentrated. After adding ammonium fluorosilicate, oxide wax, flotation iron mineral to obtain iron concentrate, iron tailings plus sulfuric acid, carboxymethyl cellulose, salicyl hydroxamic acid, C5-9 hydroxamic acid and oxalic acid, once Rough selection and three times of selection of bismuth flotation concentrate containing Nb ₂ O ₅ 1.67% and recovery rate of 40.14%, the concentrate is further separated by iron and bismuth by strong magnetic, and bismuth concentrate and magnetic products of non-magnetic products are obtained. Yuci concentrate.

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