First, the technical name: tailings associated fluorite comprehensive recycling technology
Second, the scope of technology: associated fluorite tailings
Third, the technical brief
(1) Basic principles
The depletion of fluorite resources has become a bottleneck restricting the development of fluorine chemical industry in China. The research and implementation of the recycling of associated fluorite resources is of great significance to alleviate the shortage of raw materials for fluorine chemical industry. The fluorite recovery technology of the persimmon garden tailings has been included in the national “Eighth Five-Year Planâ€, “Ninth Five-Year Plan†and “Eleventh Five-Year Planâ€.
Shizhuyuan is the largest associated fluorite deposit in China. It has proven associated fluorite reserves of about 46 million tons, accounting for 70% of the national associated fluorite reserves. Fluorite minerals are densely symbiotic with other minerals and are infiltrated with various skarn minerals. Often intergrown fluorite gangue minerals, but also with a magnetic iron ore, chlorite, white mica, epidote, quartz, feldspar micro fine wrap. Shizhuyuan associated mineral fluorite is a typical hard rock. Because mineral technical complexity, Shizhuyuan metal selected from the recycling factory in the production of tungsten, molybdenum, bismuth main producing several metals, fluorite minerals in the tailings are discharged. This technology is mainly for the comprehensive recovery of fluorite in tungsten, molybdenum and rhodium polymetallic flotation tailings. New technologies such as high-efficiency concentrated de-peoning, high-gradient magnetic separation to remove magnetic minerals, new ore dressing agent flotation fluorite at room temperature, flotation column flotation machine, selective return of medium mine, strong magnetic desiliconization, product splitting, etc. The idea is to solve the problem of recycling fluorite in the tailings of Shizhuyuan.
(two) process
1. Raw material preparation
The grade of fluorite in the floating tungsten tailings is generally 17% to 22%, which is the target mineral for separation and recovery. Non-purpose minerals are mainly quartz, feldspar and calcite , as well as chlorite, epidote, biotite, muscovite, hornblende and tremolite . From the results of particle size analysis, fluorite is mainly distributed in the -74μm particle size in the floating tungsten tailings, the yield is 82.37%, the CaF2 occupancy rate is 85.62%, and the particle size composition is suitable for flotation.
2, sorting
The new fluorite ore dressing process firstly uses the weak magnetic and strong magnetic separation to magnetically group the floating tungsten tailings. The fluorite grade of the non-magnetic products after assembly is improved, the mineral composition is simplified, the fluorite flotation is optimized, and the volcanic flotation is optimized. The pressure of flotation. The weak magnetic separation recovers the ferromagnetic minerals in the floating tungsten tailings, and after selection, the magnetite concentrate is obtained. The strong magnetic floating tailings tungsten divided into two parts, the magnetic fraction containing wolframite, garnet weakly magnetic minerals, etc., in isolated wolframite ore and garnet concentrate product by gravity. The non-magnetic part is concentrated and then floated with fluorite, so that the ore concentration and concentration of fluorite flotation are easy to control. At the same time, the concentration operation can remove the remaining chemicals and fine slime in the pulp, reduce their interference to the flotation process, strengthen the stability of fluorite beneficiation, and make the concentrate quality more secure.
3. Flotation
The fluorite flotation adopts a rough and sweeping process, and the flotation concentrate is desiliconized to obtain the final fluorite concentrate. The acid grade fluorite concentrate and metallurgical grade fluorite concentrate are obtained by reasonable return or separate treatment of the middle ore. mine.
(3) Key technologies
The key to the new process technology is to use magnetic separation first, magnetically grouping the floating tungsten tailings with weak magnetic and strong magnetic separation, and fluorite after concentrating the non-magnetic part.
Fourth, technical application and typical projects
Investment and income of typical projects
Total investment | 5,947,560 yuan | Of which: equipment investment | 256.95 million yuan |
Operating cost | 15 million yuan / year | Equipment life | 10 years |
Comprehensive utilization benefit | 13 million yuan / year | Investment recovery period | 4.5 years |
The fluorite associated with the Shizhuyuan tungsten-molybdenum-niobium polymetallic deposit has high grade and large reserves. The average grade of fluorite contains CaF221.31%, and the fluorite reserves amount to 70.9 million tons, accounting for 70% of the total associated fluorite reserves in the country. It is worth more than 30 billion yuan. The fluorite selection plant invested 59.476 million yuan to build two new fluorite recycling production lines with a total construction area of ​​5,629 m2, including the main workshop for fluorite recovery, dewatering, drying, pelleting, warehousing, etc. After the project is completed, it has an annual output of 10 Wan t fluorite concentrate production capacity. At present, the output is basically stable at 300t/day, the grade is above 94%, and the recovery rate is about 40%.
V. Application effect and promotion prospects
The tailings associated fluorite recovery technology integrates the new beneficiation technology, reduces the tailings storage, solves the problem of fluorite recovery in the persimmon garden tailings, and creates significant economic benefits for the enterprise and enhances the competitiveness of the enterprise. This technology provides support for the comprehensive recycling of associated fluorite resources in China and has a good prospect for promotion.
Pump Shaft Grinding Machine
1 bed: casting structure, after two aging treatment, eliminate the internal stress;
2 workpiece feeding mode: imported servo motor + elastic coupling + ball screw drive;
Table motion mode: imported servo motor + elastic coupling + ball screw drive;
3 dresser: arc dresser, driven by hydraulic cylinder;
4 workpiece speed regulation mode: ac frequency conversion speed regulation;
Feeding and unloading mechanism: single arm type;
5.Workpiece spindle: sleeve spindle, grinding wheel spindle: oil mist lubrication spindle);
6. spindle frequency conversion: 25KVA converter;
7. ball screw lubrication: centralized lubrication;
8.Electrical system: mitsubishi PC, touch screen;
9. the machine tool has the self-diagnosis function, can promptly eliminate the fault;
Shaft Part,Pump Shaft Grinding Machine,Shaft Processing,Cnc Pump Shaft Grinder
Xinxiang Sunrise CNC Bearing Equipment Co., Ltd. , https://www.boringmachine.nl