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Outline
As for the high-calcium silver-vanadium ore from Yichang of Hubei Province, which has low grades of silver and vanadium but high content of calcium, the feasibility of removing calcium-bearing minerals therein, predominantly dolomite, by reverse flotation was explored through experiments, and the effects of grinding fineness, type and dosage of depressant, pH of pulp and collector dosage on decalcification and vanadium recovery were investigated. The results show that with grinding fineness of-0.074 mm 77.19%, sodium silicate, sodium oleate and sodium carbonate at dosage of 400 g/t, 800 g/t and 1 500 g/t, respectively, a closed-circuit reverse flotation test can produce a vanadium concentrate grading 1.04% V2O5 at 93.56% recovery, with CaO content of 3.37%. It is shown that the calcium-bearing minerals have a CaO grade of 27.55%, showing CaO removal rate reaching 85.34%.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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