Zinc Copper In Gold Ores And Occurrence Condition And Pollution Characteristics Of Tailings

Skarn gold deposits associated pollution elements.including zinc content is relatively high compared with the type of pollution elements generally.Taking a auricupride in southeastern Hubei Province as an example to study the occu rrence state and pollution characteristics of associated zinc in auricupride raw o res and tailings.Using XRD and MLA（Mineral Liberation Analyser）to study t he composition phase and the zinc elementoccurrence,disseminationcharacteristi cson raworesand dry stack tailings.In combination with zinc in ores and dry b ackfilling materials heap backfilling materials in chemical form and characteristi cs of environmental chemistry research experimental analysis,this paper discuss es the occurrence and pollution characteristics of zinc in skarn type gold and c opper deposits in raw ore and tailings.The main results of the research work are as follows:1.Undressed ore occurrence state of the zinc and embedded characteristics of the mineral after flotation.By zinc the quantity analysis and comparing the MLA,undressed ore of zinc in the independent minerals accounted for about 79.28%,in the carrier minerals accounted for about 20.72%;Tailings in independent mineral zinc element in proportion about 61.54%,accounted for about 38.46%of carrier minerals.2.Elements in the mineralprocessing-environmental chemistry of dry stack tailing s characteristics:（1）According to the particle size analysis of the tailings and dry pile tailings,the particle size is the highest at 80 mesh,and the distribution rate is 29.43%.With the increase of tailings grain size.the content of zinc decreases step by step.（2）According to the analysis of mineral water.it can be seen that the content of ore and water increases gradually from 1:2.5¹:7.5.and the content of mineral water decreases from 1:7.5¹:15,7.5 when the highest zinc content was measured,1.516 mg/kg.The results show that the leaching of zinc in the dynamic（oscillating）15³0min is basically the same as that of the static.which indicates that the leaching of zinc in tailings is basically the same as the impact of light rain and rainstorm in nature.Rain infiltration,the leaching of zinc may have a greater impact.（3）The results showed that the pH of the leaching solution was closely related to the dissolution of zinc.Under the acidic condition.the linear correlation coefficient was 0.9994.When the leaching time increased from 1 to 7 days,the pH gradually increased.The pH gradually increased with the increase of leaching time.The main reason is that in the initial leaching of tailings may contain more alkaline substances（metal or carbonate）.to a certain extent.inhibition of pH.with the increase in the pH of the reasons may be due to tailings Pyroxene and pyrrhotite oxidation and Under the action of Fe³⁺and H₂O and generate the Fe²⁺、H⁺and SO₄^2-and to lower the pH.（4）By zinc total amount.tailings and chemical speciation analysis of chemical composition,the zinc in the tailing mostly occurs in independent mineral crystals in the hole and carrier mineral crystal lattice.at the same time under the environment of natural oxidation and backfilling of zinc is not easy to release to the external environment.tailings is in stable condition.the risk control.