A lead ore is a zinc oxide ore for the recovery of metallic minerals sulfide mineral galena metal; oxide ore white lead, calamine, hemimorphite and the like. Other metallic minerals are sphalerite, blue copper ore, pyrite, pyrrhotite, a small amount of goethite and lepidocrocite like. Non-metallic minerals are quartz, clinochlore, carbonates, sillimanite, sericite, cordierite, epidote, barite. In the ore, the galena is shaped like a grain, which exists as a residual residue, and a trace amount of azurite is distributed at the edge. Other metal minerals are less abundant and mainly exist in a gel-like structure and a honeycomb structure. The phenomenon of exchange between metal minerals is more obvious. The ore contains 10.87% of lead, of which 4.75% is present in the sulfide and 6.12% (56.30% of the total lead) is present in the oxide. The zinc content is 12.18%, 11.44% (93.9% of the zinc content) of zinc is present in the oxide, and only 0.74% is present in the sulfide by sphalerite. Therefore, this experiment conducted a selective test study on lead minerals (including oxides and sulfides) and zinc minerals in the oxidized state. The selection process preferentially selected lead sulfide minerals, lead oxide ore and zinc oxide ore. According to the characteristics of the ore, and through a comparison of various test schemes, the rough grinding of the ore is finally determined, and the heavy and coarse-grained minerals are separated from the fine grade by the shaker, and then separately into the flotation. Through experimental research, it is determined that the shaker concentrate is re-grinded, lead minerals (lead sulfide, lead oxide) by one rough selection, three times selection, zinc oxidized minerals, two times of rough selection, three selections of three selected tests The process; while the shaker tailings differs only in fineness compared to the concentrate, the agent is appropriately adjusted according to practical experience, and a similar process is adopted. First, the nature of the ore (1) Spectral analysis of raw ore The ore spectrum analysis is shown in Table 1. (II) Multiple analysis of raw ore chemistry A number of analyses of ore chemistry are shown in Table 2. (III) Analysis of the original mineral phase The original mineral phase analysis is shown in Table 3. From the results of phase analysis, the valuable component lead of the ore is present in the sulfide ore and oxidized ore, which are 4.75% and 6.12%, respectively, which are considered separately during the test. The zinc content in the sulfide is only 0.74%, and the zinc content in the oxide is 11.44%, that is, 93.92% of the zinc is present in the oxidized state. Therefore, the zinc in the oxidation state is mainly recovered in this test. (4) Separation of raw ore The results of the ore screening are shown in Table 4. (5) Material composition and characteristics of ore The structure of the ore: the ore has a gelatinous structure, a honeycomb structure, a part of the residual structure, and a vein structure. There are many kinds of metal minerals in the ore. The metal sulfide ore has galena, sphalerite, pyrite, pyrrhotite, etc. The metal oxide ore mainly includes white lead ore, smithsonite, heteropolar ore, and blue copper. Mine, fibrite, goethite, etc. Non-metallic minerals include quartz, oblique chlorite, carbonate, sillimanite, sericite, cordierite, epidote, barite, and the like. The galena is in the shape of a grain, which exists as a residual residue, and is replaced by aramidite along the cleavage and edge. The sphalerite is shaped like a crystal, and is replaced by goethite, fibrite and azurite along the edge, leaving only residual crystals. Pyrite has a grain-like shape with a crushed structure and a part of a vein structure. It is replaced by fibrite and goethite along the cleavage and fissures, and a small amount of galena is filled along the fissure. A small amount of blue copper ore is an oxidation product of copper sulfide, which is distributed on the edge of galena and has a vein-like structure. Fibrite and goethite are mostly colloidal structures to replace pyrrhotite and pyrite. Quartz, oblique chlorite and carbonate minerals are the main gangue minerals. Quartz is present in the form of interstitials in its grain-like and granular aggregates. The oblique chlorite is mostly cryptocrystalline in the scale-like crystal structure, and is brownish by iron staining. The carbonate is distributed in a vein like a grain-like aggregate. Other gangue minerals are less in content, and the sillimanite is in the form of a fiber-morphing structure, a radial crystal-morphing structure, and fine particles. The sericite has a crystal structure with scales and a directional distribution, which is mostly brown by iron staining. Cordierite is shaped like a crystal, granular, ovate, and oriented distribution. The attapulgite has a grainy and granular aggregate. The barite is grainy and has a crushed structure with limonite distributed along the crushed fracture. Second, the beneficiation test The ore belongs to lead-zinc ore, the ore colloidal structure and honeycomb structure exist, the hardness is low, and the fine-grain content is high. If the ore is directly into the flotation by grinding, the fine-grained grade is easily formed into mud. Increasing energy consumption is not conducive to sorting. Now, for the characteristics of the ore, the ore is first coarsely ground to achieve -53.8% of the ore. After the shaker test, the shaker tailings are directly fed into the flotation, which not only saves energy, And avoid over-grinding to form slime affecting concentrate indicators. The coarse-grained shaker concentrate is then ground for flotation. (1) Shaker test The ore samples and the fineness of grinding-200 mesh and 53.8% of the ore samples were placed in a shaker for comparison test. The test results are shown in Table 5. It can be seen from the test data in Table 5 that the slime contains a large amount of fine-grained lead-zinc ore, and the tailings cannot be disposed of. It can be seen from the test phenomenon that when grinding to -200 mesh 53.8%, the coarse and fine fractions are obvious, the fine fraction of the middle ore and the tailings are finer, and the valuable components are basically dissociated from the gangue minerals. After re-election by shaker, the grade of lead and zinc in the coarse grade decreased from 10.65% and 12.50% to 10.23% and 11.64%, and the grade in the fine grade rose to 11.33% and 13.87%. However, lead and zinc have not been effectively enriched in the coarse and fine grades, and the shaker mainly plays a role in classification. The fine-level medium-325 mesh content is 89.3%, which is directly into the flotation. The shaker concentrate needs to be ground and then floated. (2) Shaker coarse-grained flotation test The shaker concentrate needs to be ground into the flotation. The main conditions for grinding fineness, lead sulfide collector , lead sulfide ore sulfide, and zinc sulfide mineral sodium sulfide were investigated. Grinding fineness test. Whether metal minerals and gangue minerals are fully dissociated is an important factor affecting the flotation index, and the fineness of grinding determines the degree of monomer dissociation between minerals. Appropriate grinding fineness can remove more gangue minerals and fully enrich metal minerals, and ensure that metal minerals do not consume energy due to excessive and muddy, and affect the recovery rate of metal minerals. Therefore, reasonable Grinding fineness is essential. The grinding fineness test uses 100 g/t of ethyl xanthate and butyl ammonium black medicine, and 20 g/t of 2 # oil, which is roughly selected once. The test results are shown in Table 6. It can be seen from the test results in Table 6 that when the fineness of the grinding reaches 72.3%, the selection index is better, and the other conditions are tested for the grinding of the shaker concentrate to -200 mesh 72.30%. Sulfide ore collector dosage test. In the flotation process of metal sulfide ore, the commonly used collectors are xanthate and black medicine, and the polar group (philophilic group) contains a divalent sulfur atom which is chemically adsorbed on the surface of the sulfide ore. Therefore, it can be very Good separation of sulfide ore and gangue. The lead sulfide in the ore is effectively separated by adjusting the amount of the collector. The test results are shown in Table 7. It can be seen from the test results in Table 7 that as the collector increases, the concentrate grade gradually decreases, and the recovery rate gradually increases. The effect of the inclusions in the concentrate on the concentrate increases with the amount of collector. Increase. For comprehensive grade and recovery rate indicators, it is advisable to choose 100 mg/t of ethyl xanthate and 100 g/t of butylamine black medicine. Lead oxidized ore flotation sodium sulfide dosage test. The shaker concentrate is once coarsely selected under the conditions of 100g/t of each of the xanthate and butylamine black drugs, 20g/t of 2 # oil, and the vulcanization of the eosin and butylamine black drugs under the condition of 60g/t. Lead, the selection of lead oxide for the selection of lead sulfide tailings. The amount of sodium sulphide is critical when flotation of lead oxide minerals. The sodium sulfide dosage test was carried out using butyl xanthate 120 g/t and 2# oil 10 g/t. The test results are shown in Table 8. It can be seen from the test results in Table 8 that when the amount of sodium sulfide is 1500 g/t, the selection index is better than other amounts, so the amount of sodium sulfide is determined to be 1500 g/t. The amount of sodium sulfide was 500 g/t, and the amount of butyl yellow was 60 g/t. Zinc oxide ore flotation sodium sulfide dosage test. The zinc oxide test was carried out on the tailings after the selection of lead sulfide and lead oxide. The test adopts the second rough selection process, and the second rough selection conditions are the same, all of which are: sodium carbonate 1000g/t, water glass 800g/t, dodecylamine 100g/t, 2 # oil 10g/t. Under these conditions, the effect of the amount of sodium sulfide on the flotation of zinc oxide ore was examined. The test results are shown in Table 9. It can be seen from the test results in Table 9 that the amount of sodium sulfide has a significant effect on the oxidation ore sorting of zinc. The sodium sulfide is too low, and the zinc oxide is difficult to separate from the slime. The amount of sodium sulfide is too high and the concentrate index is not ideal. According to the test results, it is determined that the coarse selection of sodium sulfide is 8kg/t, and the second coarse selection is 4kg/t. The selection index and test phenomenon are ideal. Comprehensive process test. The comprehensive process test uses raw ore coarse grinding, shaker re-election, and shaker concentrate to re-grind and select three times to select lead sulfide minerals by one rough selection, and one rough selection to select three times to select lead oxide. Minerals, two rough selections, three selections of zinc oxide minerals test process. The shaker tailings are directly flotation using a similar process to the shaker concentrate flotation. The test results are shown in Table 10. The full analysis of concentrates is shown in Table 11. It can be seen from Table 10 that the yield of lead sulfide ore concentrate is 7.65%, the lead grade is 61.00%, the lead recovery rate is 43.82%, the lead oxidized ore concentrate yield is 10.15%, and the lead grade is 51.41%. The lead recovery rate is 49.00%; the zinc oxidized ore concentrate yield is 23.22%, the zinc grade is 45.77%, and the zinc recovery rate is 85.02%. It can be seen from Table ll that the quality of lead-zinc concentrate is high, the quality of lead sulfide concentrate reaches the third grade standard of YS/T319-1997, and the quality of lead oxide concentrate reaches the standard of YS/T319-1997, zinc concentrate. The quality has reached the YS/T320-1997 three-level product standard [3] . Third, the conclusion (1) The test ore is a polymetallic oxidized ore, and there is also a partially sulfided lead. The valuable components are lead sulfide and oxidized lead-zinc ore. The elements that can be comprehensively recovered are lead and zinc. The ore is a refractory lead-zinc mine. (2) The metal minerals in the ore mainly include galena (PbS), and the oxidized ore has lead carbonate, zinc carbonate and zinc silicate. Other metal minerals include sphalerite, azurite, pyrite, pyrrhotite, fibrite, goethite, etc. Non-metallic minerals include quartz, oblique chlorite, carbonate, and sillimanite. Sericite, cordierite, epidote, barite, etc. (3) After the test process and conditions were investigated, the rough ore of the ore was finally determined, and the heavy minerals were separated from the coarse mud by the shaker, and then separately selected into the flotation, and the oxidized ore of lead sulfide and lead were separately selected. Zinc oxide ore. Through a number of conditional tests, it is finally determined that the shaker concentrate re-grinding-lead mineral (lead sulfide, lead oxidized ore) is cleaned by one rough selection and three times of selective-zinc oxidized ore by three rough selections and three times. Selected test process. Lead and zinc are better enriched. references [1] Wei Dezhou. Solid material sorting [M]. Beijing: Metallurgical Industry Press, 2008, 10. [2] Zhu Jianguang. Flotation agent [M]. Beijing: Metallurgical Industry Press, 1993.4. [3] Editorial Committee of Mineral Resources Comprehensive Utilization Manual. Mineral Resources Comprehensive Utilization Manual [M]. Beijing: Science Press, 2000. KINMAN, a leading manufacturer in China, specializing in a galaxy of Trailers & trailer parts . Trailer Safety Chain, Safety Hook, Pintle Hook, Tow Hook NINGBO KINMAN AUTO PARTS CO.,LTD. , https://www.kinmantrailer.com
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