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This is an article in the field of mineral processing engineering. Barium slag is toxic solid waste, and a large amount of barium slag is piled up to seriously harm the environment and cause huge waste of national land resources. Acid-dissolving barium in acid leaching barium residue is one of the best ways to dispose of barium residue and recover barium. The paper adopts the flotation process to recover the barium sulfate in the acid leaching tailings of the enriched barium slag, in order to realize the comprehensive recovery of barium resources in the barium slag. The experimental research of the flotation recovery of barium residue acid leaching residue shows that. Under the condition that the amount of sodium carbonate is 2000 g/t, the amount of sodium silicate is 500 g/t and the amount of sodium oleate is 3000 g/t, through the flotation closed-circuit process of one roughing, four beneficiation, and two sweeping. Obtained the flotation index of 85.38% barite concentrate grade and 69.35% recovery rate. Concentrate products meet the barite standards used in the industrial production of barium carbonate.

This is an article in the field of mineral processing engineering. Some unavoidable ions commonly present in the slurry solution have an important influence on the flotation separation of lead-zinc sulfide ore. The unavoidable ions in the slurry mainly come from the water used in the processing plant, the dissolution of minerals, the dissociation of activators or depressants, and the primary ions introduced by the release of fluid inclusions and the secondary ions introduced during the grinding process. This article summarizes and analyzes the effects on the flotation separation of lead-zinc sulfide ore which is caused by the primary ions introduced in the slurry and the secondary inevitable ions introduced in the grinding system. It is found that both primary ions and secondary ions have obvious effects on the flotation behavior of lead-zinc sulfide ore. And many scholars have done a lot of research on this phenomenon. In this paper, a great breakthrough has been made through the adjustment and control of reagents and changes in the grinding environment. At the same time, this article provides important research ideas for follow-up researchers. The focus of this article is how to integrate the previous research results with the field process significantly, how to eliminate inevitable ions from the source without affecting the industrial economy, The important direction of future research is still how to reduce the influence of inevitable ions on the flotation index from the field process.

This is an essay in the field of mineral processing engineering. Lead-zinc mine is one of the important strategic mineral resources in our country, and it is generally poor, fine and complex. Lead-zinc sulfide deposit is about 90% of total reserves. At present, flotation is the most commonly used method for the beneficiation of lead-zinc sulfide ore, and the selection of flotation reagents plays a decisive role in the flotation process index. In this paper, recent research progress of zinc sulfide flotation reagents is summarized, emphatically introduces the collecting agent, inhibitor and activator, analyzes the future the key research direction of zinc sulfide flotation, finally points out that the microbe as flotation reagents zinc sulfide flotation in the broad application prospect in the future, to achieve efficient vulcanization lead-zinc separation to provide technical and theoretical support.

This is an essay in the field of mineral processing engineering. In China, fluorite mainly exists in the form of concomitant deposits. In the flotation process, other useful minerals are usually preferentially floated, and a large amount of fluorite exists in tailings. In this paper, the restrained fluorite and calcite in the floating tungsten tailings are taken as objects, and ultrasonic wave is added to change the floatability of the two, so as to explore a method to optimize the comprehensive utilization level of fluorite in the floating tungsten tailings. After ultrasonic pretreatment of pulp inhibited by sodium humate for 39 min, the flotation recovery of fluorite reached 84.74%, while the flotation recovery of calcite was only 11.47%, with a difference of 73.27%. Exploring the mechanism of ultrasonic pretreatment, it is found that the absorption intensity of sodium humate on the surface of fluorite is lower than that of calcite in the infrared spectrum detection. Ultrasonic pretreatment can desorb the sodium humate on the surface of fluorite, increase the absorption amount of sodium oleate on the surface, and make the zeta potential move forward; In addition, ultrasonic pretreatment mainly affects the content of sodium humate on the mineral surface, but does not affect the content of sodium oleate on the mineral surface. If only sodium humate exists in the slurry system during ultrasonic pretreatment, the sodium humate desorption speed is faster, which is more conducive to adsorbing the sodium oleate added subsequently.

This is an essay in the field of mineral processing engineering. A molybdenum mine in Henan Province belongs to the skarn type molybdenum mine, which has the characteristics of extremely fine embedded particle size and high mud mineral content, and the molybdenum has suffered poor recovery. This paper systematically analyzed the ore properties and production status and analyzed the main problems existing in the production. In order to meet the needs of the 4000 t/d capacity expansion and reconstruction of the ore dressing plant, and to synergistically strengthen the recovery of fine-grained molybdenite particles, a cyclonic-static microbubble flotation column was proposed to add combined with the structural characteristics and separation advantages. The research results show that the molybdenum ore was embedded with micro-fine size, and -0.038 mm and -0.020 mm molybdenite accounted for 75.80% and 38.68%, respectively. Moreover, the ores contained a large amount of epidote, montmorillonite, chlorite and other argillaceous minerals, and the content of argillaceous minerals in some pit mouths was more than 40%. The existing flotation process has suffered poor recovery in the fine-grained particles, and the loss of molybdenum with -0.020 mm size in the tailings accounted for more than 50%. Laboratory flotation test results show that the cyclone-static microbubble flotation column had a good flotation effect on molybdenum recovery in total tailings and rougher tailings, and the concentrate enrichment ratio and molybdenum recovery rate were obviously better than flotation machine. The engineering practice further shows that the cyclone-static microbubble flotation column played a role in regaining better recovery for the existing flotation column, and the molybdenum recovery rate after the expansion was increased by more than 4 percentage points, and the loss of fine-grained molybdenite particles in tailings were significantly reduced, which achieved significant economic benefits.

This is an essay in the field of mineral processing engineering. In this paper, a rare earth and associated fluorite resource in Henan Province was studied. Based on the results of process mineralogy and small beneficiation experiments, an extended continuous test with a capacity of 60 kg/h was carried out. Through chemical analysis and AMICS microscopic identification, it was found that the content of REO and CaF2 was 1.53% and 18.22%, respectively. The target minerals for REO separation were hamartite and parisite. The process of "mixed flotation - separation flotation of REO and fluorite " was used to recover REO and fluorite from ores. On this basis, the extended continuous test was carried out, and finally obtained the rare earth concentrate with REO grade of 52.54% and recovery rate of 51.15%, and the fluorite concentrate with a CaF2 grade of 94.76% and recovery rate of 60.80%. The concentrate product index was good, and comprehensive recovery and utilization of REE associated fluorite were preliminarily realized. It is helpful to provide technical support for the production of enterprises and provide a basis for the comprehensive development and utilization of the same type of rare earth and co-associated resource deposits.

This is an essay in the field of mineral processing engineering. Barite is an important non-metallic mineral with the characteristics of large proportion, non-toxic, non-magnetic, easy to absorb rays, etc. It is mainly used for oil and gas drilling mud weighting agent, preparation of barium-containing chemical products and barium alloys. China is a major exporter of barite. This paper conducts beneficiation test research on low-grade barite ore from Guizhou, China. After the closed-circuit test of “one roughing, one scavenging and two cleaning”, sodium carbonate as regulator, water glass as inhibitor and sodium dodecyl sulfate as collector, a barite concentrate with a BaSO4 grade of 90.38% and a recovery of 91.78% has been obtained. The test technical indicators are good, and the concentrate meets the requirements of the first grade chemical barite. The research results can provide important technical support and reference for the development and utilization of barite resources.

This is a paper in the field of mineral processing engineering. Phosphogypsum is a by-product produced during the production of wet process phosphoric acid. At present, China's phosphogypsum has a large annual new emissions, environmental and safety risks, which seriously restrict the sustainable and healthy development of phosphorus chemical enterprises.In order to solve the problem of high silica content in Sichuan phosphogypsum, the desilication tests werecarried by reverse flotation process.The test results showed that through reverse flotation process of "one roughing, one cleaning, one scavenging, middling returning in sequence", gypsum concentrate was obtained with yield of 89.63%, grading 1.85% SiO2, grading 96.85% calcium sulfate dihydrate with recovery of 96.72%, under conditions of pulp pH valuewith 5.3, BK421B as collector. The research provides technical support for resource utilization of phosphogypsum.

This is a paper in the field of mineral processing engineering. The mineral characteristics of a vanadium titanium iron concentrate sample from Panxi were studied using sieve analysis, polarizing microscope, X-ray diffractometer, Zeiss Sigma 500 scanning electron microscope, Bruker energy spectrometer, and AMICS automatic mineral analysis system. The main gangue minerals in the sample are magnetite pyrite, granular ilmenite, pyroxene, feldspar, etc. The contents of coarse and fine products TFe, S, SiO2, Al2O3, MgO, and gangue minerals are quite different. A small amount of Fe exists in ilmenite, magnetic pyrite, and non-metallic minerals. Ti mainly exists in the form of titanium magnetite. ilmenite and magnesium aluminum spinel are inlaid on the base of titanium magnetite in lamellar, veinlet, thin strip, grid, and needle shapes, The particle size of the guest crystal mineral is very fine, making it difficult to grind, separate, and post treat the product. The use of grinding magnetic separation can increase the TFe grade of vanadium titanium iron concentrate by 2-3 percentage points. The essence of the improvement is a significant decrease in the content of SiO2, Al2O3, and MgO in the concentrate, with a decrease of SiO2>MgO>Al2O3. The TiO2 content of the concentrate does not change much during the improvement process, with Fe/TiO2 increasing from 4.29 to 4.50, V2O5 grade slightly increasing, and S grade slightly decreasing.

This is a paper in the field of mineral synthesis, covering the areas of mineral processing engineering and ceramics and composites. Tailings of a vanadium-titanium magnetite plant in Panzhihua were subjected to regrinding and re-election experiments, and an iron ore concentrate with a Fe grade of 58.59% was obtained by the "step grinding and step separation" process. The ilmenite concentrate with TiO2 grade of 46.63% was obtained by adopting the flotation flowsheet of "one roughing, one scavenging, three cleaning". The TFe and TiO2 of the reselection tailings of vanadium-titanium magnetite were 5.71% and 2.96%, respectively. The process was achieved efficient separation of effective components. The foamed ceramic material with a volume density of 482 kg/m3 and a water absorption rate of 2.35%, and a compressive strength of 3.03 MPa was obtained by using the reselection tailings of vanadium-titanium magnetite, feldspar tailings and kaolinite pyrite tailings as the base material, and silicon carbide as blowing agent at 1160℃ for 30 min. The comprehensive utilization of vanadium-titanium magnetite tailings is realized.

This is a paper in the field of mineral processing engineering. According to the characteristics of a certain barite ore in Northwest China, such as uneven distribution of barite ore, uneven dissemination particle size of barite, and extremely close dissemination relationship between barite and quartz, a detailed beneficiation process test was carried out. The research results show that: Sodium silicate as depressant, oxygen fossil sodium soap as a collector, which can effectively realize the barium sulfate and gangue separation, using fast segmentation strengthened flotation technology, reduce the selected operation load and strengthening the comprehensive recovery of barium sulfate, small closed-circuit flotation tests with the grade of barium sulfate in the barite ore concentrate 89.16%, the SiO2 grade is 0.85%, recovery rate of barium sulfate 92.01% better technical index, barite ore concentrate products meet brick wells with barite powder quality standards.

This is a paper in the field of mineral processing engineering. Application of ultra-fine grinding technology to treat phosphate ore can change the physical and chemical properties of phosphate containing minerals in phosphate ore, thus improving the dissolution and release of phosphorus in phosphate ore, so that it can be used as phosphate fertilizer. As an ultra-fine grinding equipment, the feasibility of using stirred mill to treat phosphate ore and the research on the influence of process parameters on grinding effect are not perfect. A phosphate ore in Hebei Province was wet ground by a vertical stirring mill in this paper.The particle size distribution of the ground product was detected by NKT6100-D laser particle size analyzer.The effect of grinding process parameters on the particle size composition of product and the content of newly formed particles was explored, and the product particle size was parametrically analyzed by R-R equation to determine the more appropriate operating process parameters. The results showed that under the conditions of agitator speed of 550 r/min, grinding concentration of 65%, filling rate of 60%, feed to ball ratio of 0.5 and grinding time of 30 min, the available phosphorus content and phosphorus solubility in citric acid of 8.75% and 74.03%, particle characteristic parameter b of 0.371 and uniformity coefficient n of 1.426 were obtained. It can be seen that it is feasible to use a vertical stirring mill for ultra-fine grinding of phosphate ore.

This is a paper in the field of mineral processing engineering.With the continuous development of mineral processing technology and the improvement of the degree of attention to mineral resources, more and more researches on the comprehensive utilization of tailings have been carried out. Chemical multivariate analysis, SEM and other techniques were used to characterize the copper ore in a vanadium titanomagnetite iron tailings, the study shows that the main valence element is copper, and mainly exists in the form of copper sulfide. A vanadium-titanium magnetite tailings in Hebei was used as a research object. Using butyl xanthate, A8 and MK305 for flotation recovery of copper in iron tailings, it is determined that the optimum flotation technical index is obtained when the A8∶MK305 dosage ratio is 1∶1 and the crude collector dosage is 45 g/t, 2# oil is 7.5 g/t, through single collector test, combined collector test, collector dosage test and 2#oil dosage test. The results of closed circuit test show that the coarse concentrate obtained after one coarse separation and one sweep of iron tailings is ground again to -0.074 mm content ≥85%, and the copper concentrate of 18.94% grade can be obtained by adding quicklime 12 kg/t, coarse concentrate after one coarse separation, three cleaning and two sweep operation, and the recovery rate is 60.88%. In this experiment, the recovery and utilization of metal copper in iron tailings are realized.

This is a paper in the field of mineral processing engineering. Iron separation experiments of the untabulated ore of Yangtianwo and the untabulated ore of Tianjiacun were carried out by comparing the untabulated ore of Baima in Panxi.Results show that when the TFe grade is equivalent to that of iron concentrate,the iron grinding fineness of Tianjiacun off-table ore is finer than that of Yangtianwoore,the iron concentrate yield and recovery are better than that of Yangtianwo ore,and the content of harmful elements S and P in Tianjiacun iron concentrate is lower than that of Yangtianwo ore,the content of titanium in Tianjiacun high-quality iron concentrate is higher than that of Yangtianwo ore,which is disadvantageous to blast furnace smelting,and the value of titanium in its total iron tailings is lower than that of Yangtianwo ore.The research results provide data support and technical support for the rational utilization of off-balance sheet mineral resources in Tianjiacunand Yangtianwo.

This is a paper in the field of mineral processing engineering. Copper smelting slag is a kind of important secondary resource of copper. Crushing is the basis and prerequisite for the separation and enrichment of copper minerals in copper smelting slag. Based on the analysis of process mineralogy, the mechanical properties of the main copper minerals, natural copper and chalcocite, and the main gangue mineral glass in copper smelting slag were determined, including uniaxial compressive strength, bending strength, impact strength, and ductility. The relationship between mechanical properties of minerals and grinding were studied. The results showed that the main copper minerals, natural copper and chalcocite, in copper smelting slag were with lower uniaxial compressive strength, bending strength, and impact strength than glass, so they were both more likely to be crushed than glass.Natural copper had better ductility to be ground in the form of coarse-grained flakes and could be separated from other minerals. Poor ductility of chalcocite made it easier to be ground into fine-grained products.The grinding results of copper smelting slag were consistent with the analysis of mineral mechanical properties, which indicated that it was effective and feasible to analyze and study the mineral crushing by mineral mechanical properties.