The development of mineral processing equipment and beneficiation technology is synchronized. Any new high-efficiency mineral processing equipment is born with the production requirements of the mineral processing plant, and will also promote the development of the processing technology of the mineral processing plant. The technical level of equipment is the premise of realizing the beneficiation process, which not only directly affects the smoothness and efficiency of the production process, but also affects the quality of the products and the comprehensive economic benefits of the ore dressing plant. Therefore, the development and application of mineral processing equipment are highly valued at home and abroad. 1 pre-selection X-ray radiation is preselected rise in recent years an efficient, environmentally friendly, energy efficient novel sorting techniques, mainly for sorting black, colored, dilute precious metal ore. The main sorting principle is to perform ore sorting by using the intensity of characteristic X-rays (secondary X-rays) excited by the ore after being irradiated by X-rays. Figure 1 shows the working principle of the SRF3-150 X-ray radiation sorter. The ore is fed into the receiving trough and enters the vibrating chute by means of a vibrating conveyor. Under the action of the vibration, the ore is dispersed along the chute to form a ore flow, and the ore flow forms a monolith in the chute to ensure that the ore falls one by one from the edge of the trough to the X-ray assembly. Measuring area. In the measurement area, each ore is subjected to the first radiation (X-1) of X-rays. After being excited by the first radiation of X-rays, the surface of the ore is excited by the second radiation (X-2), and then A recording ray (X-2) is formed on the detection component to form a spectrum consisting of an elemental X-ray radiation curve and a scattering curve of the first time radiation. The measurement and control system of the sorting machine analyzes the spectrum, and obtains the analysis result according to the set parameters to determine whether the analytical value of the measured element is reached in each ore. When the value of this parameter is exceeded, the control system forms a control signal, activates the actuator, and relies on the impact of the baffle to make the sorting ore deviate from the orbit, fall into the receiving trough, and finally enter the ore conveyor belt (concentrate); less than this parameter The value of the lean ore naturally falls to another receiving trough into another conveyor belt (tailings). Figure 1 X-ray radiation sorter working principle Liu Mingbao of Northeastern University conducted an X-ray pre-sorting test on low-grade molybdenum ore in Liaoning. The results of the molybdenum ore sorting test with 0.064% ore grade indicate that when the separation threshold is 0.30, the raw ore tailing rate is 63.70%, the enrichment ratio is 2.03, the concentrate recovery rate is 73.11%, and the concentrate grade is 0.130%. Good indicator. 2 grinding Large vertical mills (also known as vertical spiral mixer mills or tower mills) are high-efficiency ultra-fine grinding equipment. This vertical structure of the vertical mill can improve the grinding energy efficiency. The vertical structure of the vertical mill also facilitates the internal micro-grading of the particles, reducing over-grinding and, therefore, increasing efficiency. When the ore enters the upper part of the cylinder, the downward movement of the dielectric layer is affected by the rate of rise of the circulating flow, and the rate of ascent can "wash off" the fine particles. When fed from the lower part, the fine particles rise faster in the ascending flow and can exit the mill without grinding or a little grinding. For the first time in China, Jinmo Group has applied vertical spiral agitator as a scrubbing equipment to molybdenum selection. By scrubbing molybdenum selected foam, it can effectively remove impurities and oils adsorbed on molybdenite surface, which is beneficial to improve product quality. And the recovery rate, reducing the number of selections, the effect is significant. The vertical spiral mixing mill is the ideal molybdenum selective foam scrubbing device. It is applied to the foam scrubbing of the molybdenum selection section. The excessive oil on the mineral surface is removed by grinding and scrubbing, and the foam agglomeration is opened to effectively separate the molybdenite from the impurities, thereby improving the grade and recovery rate of the molybdenum concentrate. The application practice of the vertical spiral mixing mill in the high-grade molybdenum concentrate selection process of Jinduicheng molybdenum ore shows that the flotation column selected foam can be obtained by the vertical spiral mixing mill after scrubbing. The quality molybdenum concentrate, the selected recovery rate and the total recovery rate reached 98.37% and 86.57%, respectively. Fine grinding of molybdenum ore by vertical grinding technology improves the monomer dissociation degree of molybdenum minerals, which not only improves the grade of molybdenum concentrate, but also improves its recovery rate. Due to the above-mentioned outstanding advantages of the vertical spiral mixing fine grinding technology, it has been promoted and applied in more than 100 molybdenum selection plants. The large-scale grinding equipment has been developed along with the continuous expansion of the mine scale. The large-scale equipment not only improves the processing capacity of the single machine, but also reduces the production cost and meets the development requirements of energy saving and consumption reduction. At the same time of large-scale development of grinding equipment, automatic control technology has become an important direction for future development, and the advantages of mixing grinding technology in high efficiency and energy saving will certainly promote its faster replacement of the original fine grinding equipment. 3 flotation The flotation column was invented and patented by Canadians Pirre Boutin and Tremblay in the early 1960s. Compared with the traditional flotation machine, the flotation column has the following advantages: the effect on the fine particles is remarkable, the thickness of the foam layer, the bubble size, the number of bubbles, etc. are conveniently adjusted, and the flotation process is simple. Generally, it takes 8-12 times to select the flotation machine in the molybdenum selection stage, and only about 3 times in the flotation column. The environment in which the bubbles collide with the mineral particles and the bubble particles combine statically. It is beneficial to the selection of fine or fine-grained molybdenum ore; the flotation column is easy to realize automatic control, so it is more suitable for the selection of molybdenum ore. Today, the world's boom in the research and application of flotation columns has once again taken place. Many molybdenum plants and copper- molybdenum concentrators around the world use flotation columns for the selection of molybdenum concentrates. At present, many molybdenum and copper-molybdenum plants around the world use flotation columns for molybdenum selection, such as: Haimont Molybdenum Plant in Canada, Xerida Molybdenum Plant in the United States, Gicconi Copper and Molybdenum Concentrator in Peru, and Airy in Russia. Copper and molybdenum concentrator. Practice shows that compared with the traditional flotation machine, the selection system adopts the flotation column, the grade of molybdenum concentrate is increased by 2-3 percentage points, and the recovery rate is increased by 0.5-1.5 percentage points. Due to the structure of the flotation column and the flotation machine and the difference in the floating characteristics of the coarse and fine-grained minerals, the flotation machine selects the coarse-grained minerals better than the flotation column, and the flotation column is selected. The sorting effect of fine-grained minerals is better than that of flotation machines. In view of this sorting difference, in the process of sorting molybdenum ore in Luanchuan area, a flotation machine-flotation column is combined to form a coarse and selective sorting loop, and a flotation unit is used to process the flotation column rough selection. Work tailings, forming a flotation column - flotation machine joint operation. In this way, the material enters the flotation condition under the condition that the grinding fineness is not high, and the rough selection flotation column first floats out most of the high-quality fine-grained target minerals and a part of the coarse-grained target minerals with better dissociation degree, this part The minerals are reground into fine particles and then enter the selected flotation column. The selected columns are used to select high-quality concentrates for the high-selection effect of fine-grained minerals. At the same time, the coarse-grained minerals are not well dissociated. After entering the sweeping, it is recovered by the flotation machine and returned to the middle mine. After re-grinding, it re-enters the rough selection to achieve the tailing, ensuring a high sorting recovery rate for the whole operation. Thereby obtaining a high-grade, high-recovery concentrate, and achieving the sorting advantages of the flotation column-flotation machine. Jinduicheng molybdenum mine is one of the largest molybdenum deposits in China and even in the world. In the process of mineral processing in the past years, the technical research on molybdenum ore beneficiation has not stopped. In 2006, in order to improve the ore dressing test of molybdenum concentrate quality, in the case of good ore floatability, the “flotation column + flotation machine combined process†can produce 57% of the total grade, and the selected recovery rate reaches 98. More than % molybdenum concentrate. It fills the technical gap of producing 57% molybdenum concentrate by flotation method at home and abroad. The Xiaomiaoling Concentrator uses a flotation column-flotation machine to process the molybdenum ore. The flotation column is selected by rough selection and selection. The flotation machine is selected by sweeping. The production practice shows that the ore grade is 0.117%. Under the condition of 0.0153% copper in the ore, the grade of molybdenum concentrate is 49.45%, the concentrate contains 0.27% copper, the tailing grade is reduced to 0.0099%, the overall recovery rate is 89.30%, and the sorting index is excellent. The Golden Molybdenum Baihualing Concentrator built a new production line in 2011. Under the condition that the fineness of the grinding product is -0.074mm and 60%, the rough selection adopts “one rough selection, three sweeps, and the I foam after regrind. Return to the rough selection operation "selection process, coarse selection uses two CCF type Φ5 × 10m flotation column in parallel, coarse sweep selection uses three sets of KYF-100m3 flotation machine. The application of CCF type Φ5×10m flotation column in the new production line improved the process index by comparison with the old production line, reaching the design index of 57% concentrate grade, 87% of total actual recovery rate and 87.2% of total theoretical recovery rate. And the operation of the beneficiation automation technology is realized, the work is reliable, and the index is stable. In terms of production index, the foam layer of the flotation column can maintain a relatively deep thickness, even up to 700 mm, which greatly enhances the two enrichment effects, which is difficult in a common mechanical agitation flotation machine. Through the rough selection of the flotation column, the molybdenum with high monomer dissociation (fine particles) in the slurry is preferentially floated to obtain a higher grade crude concentrate, which reduces the pressure of the selection operation and also reduces the fine particles in the tailings. The level of the grade creates favorable conditions for the flotation machine to sweep the selection operation, because the flotation machine is obviously weaker than the flotation column for the fine fraction recovery, which is very beneficial to the whole rough selection process. Flotation columns were also applied at the concentrator of the Kowloon Mining Company in Luonan County, Shaanxi Province. After the rough grinding product is rough-selected by the flotation machine, the flocculation column is used for the fine concentrate to be selected and refined. The specifications of the flotation column used are 3.6m×12m, 1.2m×12 m, 1.1m×12m, 1.0m×12m, and the grade of the product molybdenum concentrate can be increased to 48%, and the molybdenum recovery rate is 78%. The flotation column greatly simplifies the production process compared to the use of a conventional flotation machine. In recent years, the research on fine-grain flotation equipment has made great progress, and the promotion and application of the cyclone-static microbubble flotation column sorting technology in the field of fine-grain mineral separation has been gradually expanded. Election in the country's coal plant coal flotation, the flotation column made a successful application in ultra low ash clean coal preparation and coal also made a major breakthrough; in particular, the molybdenite in the field of metal ore sorting It is being widely used and shows significant advantages in improving grades, improving product grades and increasing recycling rates. Lu Fakui and Liu Yutian studied the application of a cyclone-static microbubble flotation column to the flotation of molybdenite. The research results show that the cyclone-static microbubble flotation column sorting process (referred to as column sorting) can achieve the ideal concentrate index only 2-3 times in the selected section, and even the sweeping process is not needed. Satisfactory recovery rate can be achieved, the process is greatly simplified, and the efficiency of molybdenum ore sorting is improved. At present, the pilot test project of different types of molybdenum ore in two places in Henan has been carried out using the column sorting process, and satisfactory results have been achieved. Liu Yutian and Liu Liang obtained good results in the selection of a cyclone-static microbubble flotation column for the selection of a highly difficult molybdenite. The ore is highly oxidized and extremely muddy, and the useful mineral inlay is fine. The long-term production index of the plant is not ideal. The concentrate grade can only reach about 18%, and the recovery rate can only be maintained at about 50%. After the cyclone-static microbubble flotation column is applied to the selected operation of the ore, the concentrate grade can be increased to about 40%. The advantages of the cyclone static microbubble flotation column in the treatment of fine-grained refractory molybdenum ore are also provided, which also provides an effective way for the treatment of the same type of ore. Lu Xinlei and Li Xiaobing conducted a column-sorting test study on the selected tailings of molybdenite. Through the condition test and the re-election test, a molybdenum concentrate with a grade of 38.59% and a recovery rate of 23.26% can be obtained. It not only simplifies one rough selection, one sweeping, and six selection processes, but also increases the grade and recovery of molybdenum concentrate by 1.3 and 4.72 percentage points respectively. The second phase expansion project of a copper ore plant in Xinjiang uses a cyclone-static microbubble flotation column for copper-molybdenum mixed coarse selection, copper-molybdenum mixed selection, copper-molybdenum separation rough selection, molybdenum selection, etc., and flotation machine. The sweeping operation combined with the formation of the column machine combined flotation process system, in the case of 0.65% of the original ore copper grade and 0.046% of the molybdenum grade, the copper concentrate grade was 21.8%, the copper recovery rate was 91.37%, and the molybdenum concentrate grade was obtained through stable operation. 50.6%, the molybdenum recovery rate of 55.68% of the flotation index. Compared with the first-stage flotation machine process, the combined flotation process of the column machine is obviously simplified, and the separation effect of copper and molybdenum is improved. Road Marking Machine,Road Line Marking Machine,Road Painting Machine,Road Marking Equipment NINGBO MAX MACHINERY CO.,LTD , https://www.max-machinery.com