Development of htg ceramic vacuum filter

    Ceramic Vacuum Filter The ceramic vacuum filter has a shape similar to that of a disc vacuum filter. It is mainly composed of a rotor, a stirrer, a scraper assembly, a slurry tank, a distributor, a ceramic filter plate, a water system, a cleaning device, and an automation system. composition.

    The slurry tank is welded by a stainless steel plate to support the slurry. The agitator stirs the mixed slurry in the slurry tank to avoid slurry deposition. The ceramic filter plate is mounted on the rotor, and the rotor is supported by the two bearing seats. Driven gear, and 0.5 to 2 revolutions / min rotating, the slurry under the action of vacuum, the ceramic plate adsorption filter cake was scraped by a scraper, is carried away by the conveyor, and the filtrate reaches a vacuum through the dispenser The barrel is backwashed by the water pump through the water pump system, and the filter pump must be installed under the vacuum barrel. 3m This ensures that the filtrate is withdrawn from the vacuum tank.

    The ceramic vacuum filter is equipped with a computer monitoring system. The system uses a PC bus modular industrial control machine and is equipped with various transmitters, frequency converters, multi-channel pneumatic valves, liquid level devices and other instruments. When starting up, the slurry valve is monitored by the level gauge, and the level of the slurry is controlled. The vacuum tank filtrate is detected by the liquid level meter. When the liquid level is high, the industrial control machine quickly opens the bypass valve at the outlet of the filter pump to quickly drain. The water system and pneumatic system pressure are monitored by various pressure transmitters. The speed of the spindle reducer and the speed of the agitator reducer are all regulated by the frequency converter to achieve stepless speed change.

    Development of Ceramic Filter Plates The filter medium selected for ceramic vacuum filter is ceramic filter plate. No filter cloth is used. When scraping mud, there is a gap between the blade and the ceramic. 0.4mm ~ 0.8mm Clearance to prevent mechanical wear and extend service life. As a ceramic filter plate, three conditions must be met: first, the micropore diameter is not more than 2 μ m ; second, the ceramic material must be hydrophilic; third, the material must have sufficient strength. At present, we use a hydrophilic aluminum oxide ceramic material, porosity of about 35%. Therefore, during the filtration process, surface tension is generated between the water and the hydrophilic ceramic, which causes a capillary phenomenon, so that the micropores are always filled with liquid, and when the vacuum is suctioned, the filtrate passes through the micropores, and the air cannot pass.

    Jiangsu Yixing non-metallic chemical machinery plant of a 45m2 Simply ceramic vacuum filter 2.2kw a vacuum pump, and the vacuum degree has reached - 0.095 ~ - 0.098mpa. Usually vacuum filter cloth into account pore size greater than 12 μ m, and the porous ceramic filter plate is less than 2 μ m, recovery of precious metals is high, and the filtrate was clear, without water.

    The ceramic filter plate has a fan shape and is made of alumina and other materials by practicing mud, forming, drying, firing and processing. The first generation of its internal structure is a hollow ball and the second generation is a gradient. The latter cost is slightly higher, but the filtration resistance is small and the strength is high.

    During the working process of the ceramic filter plate, the fine particles are easy to block the ceramic micropores, which affects the production efficiency. In the design process, we use each cycle of backwashing method, that is, through the dispenser from the inside of the ceramic filter plate backflush to the surface of the filter plate to achieve cleaning micropores. The backwashing is generally set in the latter area of ​​the discharge zone, and the set angle is the same as the fan angle of the ceramic filter plate. This ensures that each ceramic plate is cleaned once during each cycle. After working for a certain period of time, we used a combination of ultrasonic cleaning or chemical cleaning. At present, our ultrasonic cleaning mainly uses the most advanced mixing ultrasonic cleaning to achieve more thorough cleaning of the filter plate, and the filtration always maintains high efficiency.

    htg ceramic vacuum filter applications htg ceramic filter in Gansu Province, Jinchuan Nonferrous Metals Corporation, beneficiation plant, Jiangxi Copper Industry Company Yongping Copper, Tongling Nonferrous Metals Corporation Tongguanshan Copper, Yunnan Dongchuan Mining The Bureau, Liaoning Hongtoushan Copper Mine and other units have been applied. It has entered the international market.

    In addition, due to the lower water concentrate 3%, annual savings of transportation costs 160,000 yuan, the way to reduce consumption by 2.5% more than the year sulfur recovery concentrate 4000t, worth 300,000 yuan, and reduce environmental pollution, environmental conservation fee 300,000 yuan. The production capacity of a ceramic filter is equivalent to three imported filter presses or three folding outer filter cylinder vacuum filters.

    Although the equipment investment is large, the htg ceramic filter has high efficiency. Its biggest advantage is high output, low water content and energy saving of over 80 %. It is mainly used in lead , zinc , copper, molybdenum and sulfur in non-ferrous metal ore. Mineral dehydration.

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