|
Yongping Copper Mine is a high-sulfur associated with the large complex of gold and silver tungsten molybdenum skarn copper mine. In the initial production, mineral separation efficiency is poor, the process is not smooth the flotation operation difficult. After sorting through the efforts of several generations of mineral processing workers, indicators had significantly improved, compared with the design specifications, there is still some room for improve. In order to solve the problem of low copper recovery, according to the research results of scientific research institutions, combined with comprehensive recovery characteristics and nature of Yongping Copper Mine ore, copper, sulfur and associated gold and silver production and practical experience, priority floating copper process planktonic poor, slow floating copper minerals are fully floating, in conjunction with efficient collector, collecting capacity and selectivity of copper minerals in ore flotation process in accordance with the principle of early harvest overcharged reduce cycle , improve flotation efficient. In this paper, by pure mineral flotation tests, the actual ore flotation tests as well as the collector adsorption amount Determination of Three means, under the conditions of different pH values ??as well as the collector dosage the efficient copper collector EP, PAC Yongping copper mine copper and sulfur separation effect, and with the use of butyl xanthate, ethyl xanthate compared. The pure mineral flotation test results show that the EP PAC butyl xanthate, ethyl xanthate compared to collecting capacity of the copper, pyrite collecting capacity is weak, there is a strong selective; For the above four collector, chalcopyrite can be within a wide pH range, flotation, pyrite floatability under low pH conditions better when pH greater than 10, yellow iron mine flotability clear downward trend, when the pH greater than 12, by the strong inhibition of pyrite floatability poor; collector EP copper collector ability in a wide pH range, when EP dosage of 10mg / L, the difference between the recovery of chalcopyrite and pyrite is 29.44%, indicating good selectivity. The actual ore flotation test results show that the PAC to improve the concentrate grade, EP certain advantages to improve copper recovery and the EP more suitable for the separation of copper and sulfur in the environment of low-alkali, favor the recovery of silver minerals EP to use than the PAC should be at least 5 g / ton, to better reflect the economic benefits. Therefore, the collector EP is more suitable for the separation of copper collector as Yongping Copper Mine copper and sulfur. In ore flotation separation test, the collector of EP suitable amount of 15g / t, the flotation pulp pH value of about 8.5 (the amount of lime is 1500g / t) is the most suitable.
|