金厂峪金矿的矿石产自含金硫化矿床。主要金属矿物有黄铁矿、磁铁矿、褐铁矿、闪锌矿、自然金。其次为赤铁矿、黄铜矿、辉钥矿、少量的磁黄铁矿、斑铜矿、微量的方铅矿、辉铋矿、辉铜矿等。脉石矿物种类较多，也较复杂，其中主要有石英、碳酸盐类、斜长石、绢云母、绿泥石等十五种以上的矿物。自然金80%以上呈他形粒状，20%左右呈片状细粒状产出。自然金颗粒很细，一般在5~ 25pm,其中最小颗粒为0. 5pm,最大颗粒为30pum,主要产在黄铁矿中(约占58%)，其次是产在石英中 (占35%左右)，少量分布在辉铋矿、褐铁矿与石英接触处。
Practical process of flotation of precious metal ore by slurry pump
What are the ore characteristics and floating process of 56 jinchangshi gold mine?
Jinchangyu Gold Mine is a large-scale gold processing plant built and put into operation in 1966 to treat gold bearing pyrite ore in quartz vein. The processing capacity of the concentrator is 1000t / D, and the process of flotation cyanidation smelting is used to produce gold.
(1) Ore characteristics
The ore of Jinchangyu Gold Mine is from gold bearing sulfide deposit. The main metal minerals are pyrite, magnetite, limonite, sphalerite and native gold. The second is hematite, chalcopyrite, pyroxene, a small amount of pyrrhotite, bornite, trace galena, bismuth, chalcocite, etc. There are more and more complex gangue minerals, including quartz, carbonate, plagioclase, sericite, chlorite and so on. More than 80% of native gold is allomorphic granular, and about 20% is flaky and fine-grained. Natural gold particles are very fine, generally 5 ~ 25pm, of which the smallest particle is 0.5pm and the largest particle is 30pum. It is mainly produced in pyrite (about 58%), followed by quartz (about 35%), and a small amount is distributed in the contact between bismuth, limonite and quartz.
(2) Process flow
Its production process adopts flotation oxidation process to recover gold. The production process flow is shown in Figure 4.4.
The grinding fineness of - 0.074mm particles accounted for 55%. The flotation process consisted of primary roughing, secondary cleaning and secondary scavenging. Gold bearing sulfur concentrate was obtained by flotation, and the gold recovery was 94%. After concentration and dephosphorization of flotation concentrate, 99% of them have fineness of - 0.053 mm after two-stage continuous closed-circuit grinding, and then cyanidation is carried out. The process of two leaching and two washing zinc powder replacement is adopted in cyanidation. By product sulfur concentrate. The gold slime replaced by zinc powder is melted to obtain gold. The smelting slag is ground by ball mill and recovered by shaking table. The slag is smelted again.
What are the ore characteristics and flotation process of Linglong gold mine?
Linglong gold mine concentrator of Shandong gold group was built in 1938 and rebuilt to a scale of 500t / D in 1967. The actual production capacity is 750t / d.
(1) Ore properties
Linglong mining area is a fracture filling gold bearing quartz vein deposit. The ore body is mainly composed of auriferous quartz vein, gold bearing pyrite quartz vein and gold bearing pyrite sericite granite. The main metal minerals in the ore are pyrite, chalcopyrite, silver gold and native gold. Gangue minerals are mainly quartz, plagioclase, calcite, sericite, etc. Silver gold and native gold are mostly distributed in the pores and margins of pyrite, chalcopyrite and quartz. The ore density is 2.75t/m3.