Press time to author, to explore the large scale production of the mine can be summarized as four different stages of production, the first stage is the production of a molybdenum concentrate recovered the product, the election was molybdenum concentrate containing 27% to 32% molybdenum, containing more than 2.5% copper, molybdenum recovery is about 55%; second production stage is floating priority molybdenum, molybdenum float tailings received a job magnetic iron, iron ore and molybdenum concentrate to give two products, molybdenum give The concentrate contains 29% to 34% of molybdenum, contains more than 2.5% of copper, and the recovery rate of molybdenum increases to about 65%. The iron concentrate contains more than 60% of iron. The third stage of production is to remove iron by magnetic separation and increase it twice. Open magnetic selection operation, magnetic rough selection of tailings and secondary magnetic selection of the middle ore is concentrated and then floated molybdenum, still obtain two products of molybdenum concentrate and iron concentrate, and obtain molybdenum concentrate containing molybdenum 36 %～38%, containing more than 2.5% copper, the recovery rate of molybdenum is further increased to about 70%, the iron content of iron concentrate is increased to more than 63%; the fourth stage production process is the same as the third, only the further adjustment of the molybdenum dosing process To make a new breakthrough in the flotation recovery of molybdenum, the recovery rate of molybdenum is as high as 82%, and the magnetic separation operation reduces the ore supply. In response to this serious problem facing the enterprise, our company commissioned a small-scale experimental study of the system. The test results show that the application of the high-efficiency modifier TZK-3 can effectively solve this problem and stabilize the molybdenum concentrate. At the same time of taste, it effectively reduces the impurity content in molybdenum concentrate. When the author received the sample, it was the second stage of on-site production. This paper introduces a new type of high-efficiency and environmentally-friendly modifier TZK-3, which is a new type of high-efficiency and low-toxicity based on the mechanism of the chemical agent on the surface of the ore particles, changing the molecular structure and adding effective functional groups. Environmentally-friendly regulators, toxicity studies have shown that the lethal dose of TZK-3 in mice is D 50 =2000.46 mg/kg, while the comparison test of butyl xanthate D 50 =332.6 mg/kg, indicating the toxicity of TZK-3. It is far lower than butyl xanthate and is a low toxicity agent. Experimental studies show that small dressing, application TZK-3 in promoting efficient modifiers other valuable metal mineral recovery premise, can significantly improve the quality of the primary molybdenum concentrate, the primary molybdenum concentrate grade may be stable at 48% or more, to achieve a qualitative The leap, while effectively reducing the content of copper, lead , zinc and other impurities in the molybdenum concentrate, the copper grade can be stably controlled below 0.5%, and also significantly improve the flotation recovery effect of itching molybdenum, effectively improving the comprehensive utilization of mineral resources. Rate, with significant economic and social benefits. First, the nature of the ore The test ore sample was taken from the beneficiation production site, and was crushed to -2 mm by a two-stage closed circuit. After uniformly mixing the samples, each required sample was shrunk for experimental research. (1) Mineral composition of the sample Metal ore minerals are mainly magnetite, molybdenite, pyrite, chalcopyrite, galena, sphalerite and small amounts of trace bismuthinite. The gangue minerals are mainly chlorite, wollastonite , garnet, calcite and the like. The ore hardness is 7-10. Iron ore 39.41%, 0.69% Mo, 0.20% Cu, 0.37% Pb, 0.18% Zn, 6.79% sulfur, 0.17% arsenic, 4.74 percent silica, 0.45% of magnesium oxide, calcium oxide 2.17%. (2) Process mineralogical characteristics of the test ore sample Molybdenum ore is one of the most important recycling objects in the ore. It is a coarse and fine unequal grain inhomogeneous inlay. It is often produced in the shape of a magnetite or a semi-automorphic structure on the edge of magnetite. The mineral contact fracture is either in the crack of magnetite and gangue mineral, or in the crack of the sulfide ore crystal such as pyrite, or between the metal sulfide and the gangue mineral. In short, the molybdenum mineral mosaic relationship is more complicated, and the unevenness of the grain size of the inlay is significant. The iron mineral is mainly magnetite. It is mostly self-shaped, semi-self-shaped or his granular aggregate. It is dense block-like, plaque-like, strip-like, granular, vein-like, and closely embedded with sulfide or gangue minerals. cloth. Second, experimental research (1) Grinding fineness test It is well known that grinding fineness is one of the main factors determining the effectiveness of flotation. The fineness of grinding is not enough, the useful minerals are not fully dissociated, and the effective sorting is impossible. The fineness of grinding is too fine, resulting in over-grinding of useful minerals. The difficulty of the effective floating of the target mineral is increased, and the recovery effect is deteriorated. The molybdenum ore in the ore has the characteristics of easy pulverization. Therefore, within a certain range, with the improvement of the fineness of the grinding, the recovery rate of molybdenum has a downward trend. The inclusions in the mine are obviously strengthened, and the grade of iron concentrate is also declining. Therefore, it is very important to master the fineness conditions of the ore. Summarize the first-stage and second-stage production experience and follow-up small-scale tests. The grinding test procedure is determined as the preferred iron selection. The principle test procedure for molybdenum removal after concentration of iron tailings is shown in Figure 1. The small test is carried out with the effective floating of molybdenum minerals. The indicator is the main reference. The results of the fineness test are listed in Table 1. Table 1 Grinding fineness test results /% From the comparison of the test results in Table 1, it is known that the grinding fineness is preferably selected from 81.05% to 74 μm. (II) Comparison of principle process flow test and production practice indicators Scheme 1 adopts preferential molybdenum molybdenum. The molybdenum molybdenum process is a rough selection, five selections, three sweeps, and a medium-mine sequence return. The molybdenum tailings enters the magnetic selection and iron recovery. The iron selection is a rough selection and two selections. The fully open process, the magnetically rough selected tailings and the secondary magnetically selected medium ore are the final tailings. Scheme 2 first uses magnetic separation to remove iron (the iron selection test procedure is the same as Scheme 1), and the iron ore tailings are reconcentrated with molybdenum (the floating molybdenum test procedure is also the same as Scheme 1), and the molybdenum tailings are the final tailings. The comparison test results of the two schemes are shown in Table 2. The production comparison indicators under the two different process conditions are shown in Table 3. Table 2 Principle Process Comparison Test Results /% Table 3 Comparison of production indicators 1% The test results in Table 2 show that the beneficiation index of Scheme 2 is obviously better than that of Scheme 1, and the recovery rate of molybdenum metal and the grade of concentrate are significantly improved. It is also the promotion and application of scientific research results, and the various mineral processing technical indicators in production and production have been significantly improved. The specific indicators are shown in Table 3. Production practice shows that the simple adjustment of the production process greatly improves the economic and technical indicators of various mineral processing. (3) Contrast test comparison test At present, the grade of molybdenum concentrate produced on site is low, and the multi-element test data shows that the content of copper, lead, zinc, iron and other impurities in the molybdenum concentrate is high. For this actual situation, the Zhuzhou Beneficiation Pharmacy Research Institute selected the mine. The laboratory used the newly developed high-efficiency modifier TZK-3 to conduct systematic experimental research on how to improve the grade of molybdenum concentrate and how to reduce the content of impurities such as copper, lead, zinc and iron in molybdenum concentrate, and obtained many gratifying information. The results of the comparison between the test results of the successful application of the high-efficiency modifier TZK-3 and the on-site medication conditions are shown in Table 4. Table 4 Comparison test results under different drug use conditions /% The test data shows that the application of high-efficiency modifier TZK-3, the grade of molybdenum concentrate can be improved, and the impurity content of molybdenum concentrate can be greatly reduced. The multi-element test results of molybdenum concentrates produced under two different drug regimens are listed in Table 5. It is not difficult to know from the comparison of the data in Table 5 that the addition of the adjusting agent TZK-3 strengthens the molybdenum selection, and the production of molybdenum concentrate is significantly reduced. At present, the production site is in the process of rectification and construction of the process, and the rectification of the production process is completed. Production practice verification. Table 5 Multi-element analysis results of different adjustment Jing Jing concentrates /% Third, the conclusion (1) The high-efficiency adjusting agent TZK-3 has strong adaptability to the ore. Under the premise that the recovery rate of molybdenum flotation is basically the same, it can effectively improve the main grade of molybdenum concentrate and significantly reduce the content of impurities in molybdenum concentrate. The promotion and application is just a drug change and easy to implement. (2) Through the rational adjustment of the production process and the dosing system, the comprehensive utilization rate of mineral resources can be significantly improved, and new economic growth points can be found for mining enterprises, which will positively promote the development of enterprises. The dual effects of quality reduction, increase of production and income increase have significant economic and social benefits. concrete pump truck for sale,concrete machinery,truck mounted concrete pump Xinghan Muzhi Digital Technology (Xuzhou) Co., Ltd. , https://www.steelkingkong.com