Latest progress in copper and molybdenum and nickel ore beneficiation

The characteristics of a low-grade copper oxide ore, and the oxidation rate higher than the rate of binding, and the like Jianwen vulcanizing agent and the addition of activated ammonium sulfate under the premise of sodium silicate and sodium hexametaphosphate inhibitor in combination constitute phosphorus, mixed 680 xanthate, tetrabutylammonium black powder and hydroxamic acid collectors constituting the composition, were tested flotation. The optimal flotation conditions and chemical system of copper oxide minerals were determined. Through the closed-circuit test, the sorting technical indexes of copper concentrate grade 17.39% and copper recovery rate 59.36% were obtained.

Majie Zhen so on ASHELE COPPER copper pyrite and Zinc metal ores and ore dressing experiment for analysis of studies, the actual production together, Swirl - asynchronous static microbubble flotation column separation, enhanced recovery The technological transformation of the process has significantly improved the mineral processing technical indicators. The copper recovery rate has increased from 77.59% at the initial stage of production to 86.43%, and the zinc recovery rate has increased from 20.48% to 48.94%.

For the problem that a mixed copper- cobalt ore has a high oxidation rate, contains a large amount of carbonaceous slime, and cannot achieve the desired recovery efficiency by conventional folding method, Ou Mingming and the like remove the slime by pre-flotation to eliminate the flotation of carbonaceous slime. The effect of the process, then asynchronous flotation of copper sulphide cobalt minerals and copper oxide cobalt minerals, and the use of vulcanizing agent sodium hydrosulfide to enhance the flotation effect of copper oxide cobalt minerals. The results show that after using these measures, the obtained copper-cobalt concentrate has a copper grade of 21.12%, a copper yield of 88.55%, a cobalt content of 0.116%, and a drill recovery rate of 31.39%.

Wei Dangsheng conducted a flotation test on a copper- molybdenum ore in Guangdong, and determined the process of mixing flotation-sulfur-dissolving copper-molybdenum-copper-molybdenum separation. The mixing was carried out under the conditions of grinding fineness of 75.00%-0.074mm. Flotation, after the mixed flotation coarse concentrate is further ground to 86.00%-0.043mm, the pyrite is inhibited by lime, the copper-molybdenum flotation is obtained to obtain the sulfur concentrate, and finally the copper and molybdenum separation is carried out by using Na2S copper to obtain copper respectively. Concentrate and molybdenum concentrate.

Lu Lisheng et al. conducted an optional experimental study on a low-grade refractory copper-molybdenum ore, and determined the copper-molybdenum mixed flotation-copper-molybdenum separation-selection molybdenum tailings copper-selection copper tailings return copper-molybdenum mixed flotation In the process, the collector uses isobutyl yellow drug instead of BK301C, and the process and drug addition points are appropriately adjusted to facilitate the stabilization and improvement of the molybdenum and copper selection indexes, and finally obtain an ideal technology.

Wang Ligang et al. conducted a mineral processing experiment on a copper-molybdenum ore with a high oxidation rate in Tibet. The results show that after the first process is selected from sulfide ore oxide ores, with Dy -1 oil as collector, heteroaryl alcohol as foaming agent, water glass suppressed gangue minerals, phosphorus Knox suppressed galena, and achieved Good comprehensive technical indicators.

According to the characteristics of a molybdenum concentrate with low grade and high oxidation rate, Ku Jiangang et al. conducted a pressure alkali leaching test. The results show that when continuous leaching with atmospheric leaching, it can not only ensure the leaching rate of molybdenum reaches more than 95%, but also reduce the cost of the medicament. At the same time, the concentration of molybdenum in the leaching solution can be greatly improved.

Zhao Ping conducted a mixed flotation test study on a refractory molybdenum mine. The principle process of mixed flotation of molybdenum sulfide mineral and molybdenum oxide mineral is adopted. After the concentrate is concentrated, it is heated and selected under high alkalinity, and the selected concentrate is acid-leached to remove carbonate and other acid-soluble gangue minerals. Molybdenum concentrates with molybdenum grades and recovery rates of 45.65% and 70.68%, respectively, were obtained.

In view of the fine grain size and high lead content of a molybdenite ore, Xu Yinxing used water glass and phosphonox as inhibitors, fusel as foaming agent and Dy-1 oil as collector. A systematic experimental study. Since the selected tailings after regrind of the coarse concentrate are cleaned twice, the tailings are directly discarded, avoiding the formation of a vicious cycle of sulfide minerals such as galena in the flotation circuit, and finally obtaining the molybdenum grade. More than 57.00%, high-quality molybdenum containing less than 0.06% lead, indicating that the application effect of these measures is very significant.

Song Chengying et al. conducted a systematic experimental study on the leaching process of low-grade molybdenite ore. Under alkaline conditions, the molybdenum ore is not calcined, and the molybdenum disulfide is converted into sodium molybdate by oxygen oxidation. The filtrate is acidified and extracted to obtain metal molybdenum; for this leaching process, the researcher investigates The reaction time, reaction pressure, reaction temperature, sodium hydroxide concentration and stirring speed affect the molybdenum leaching rate. The optimization of the process conditions makes the leaching rate of molybdenum reach over 99%. The test results are quite satisfactory.

Lu Xinlei et al. conducted a flotation column sorting test on a selected tailings of a molybdenum ore. The semi-industrial cyclone-static microbubble flotation column is used as the sorting equipment, and the rough selection and two selected processes are used to improve the sorting index of the selected tailings re-grinding and re-election, and simplify The process of rough selection, 1 selection, and 6 selected flotations on the site obtained the concentrate product with a molybdenum grade of 38.59% and a recovery rate of 23.26%, compared with the on-site flotation machine sorting technical index. The molybdenum grade and molybdenum recovery rate increased by 1.3 percentage points and 4.72 percentage points, respectively.

Shi Weihong conducted a systematic flotation test on a nickel- poor ore. In the test, the combination of sodium carbonate, water glass and CMC was used to inhibit the easy-floating gangue minerals, control the slime trend, and reduce the adverse effects of the slime on the nickel flotation process. 2 times of rough selection, 1 sweeping, and 3 selections, the sorting index of nickel concentrate grade 3.03% and nickel recovery rate 78.67% was obtained.

Aiming at the difficulty of enrichment of a complex refractory silicon-nickel ore in southern China by mineral processing method, Che Xiaokui et al. conducted a leaching test using atmospheric pressure acid leaching. In the grinding fineness -0.074mm accounted for 78.60%, liquid-solid ratio of 6:1, sulfuric acid concentration of 2.60mol / L, stirring strength of 170r / min, leaching temperature of 60 ° C, leaching for 6h, leaching of nickel in the leaching of precious liquid The rate is about 86%, the leaching residue contains about 0.12% of nickel, and after three times of extraction of the leaching solution, the Ni ²⁺ concentration can reach the requirement of sinking nickel.

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