Ion-type rare earth ore is a rare strategic resource rich in medium and heavy rare earths in the world. It plays an important role in national economic construction and national defense military industry. However, in the process of leaching, enrichment, separation and purification of ionic rare earth ore, there is a high consumption of chemical materials. The problems of low recovery rate of resources and serious pollution of three wastes are difficult to separate and purify high-purity rare earth metals. The purity of conventionally produced rare earth metals is only 2N-3N. The preparation technology and equipment of 4N grade ultra-high purity rare earth metals are backward and the application of products is subject to human beings.
To this end, Beijing Nonferrous Metals Research Institute and R&D Rare Earth New Materials Co., Ltd. have independently developed eco-friendly magnesium salts and their composite systems to leach ionic rare earth ore new technology and low concentration rare earth leaching solution since 2010. A new process of non-saponification and non-equilibrium coupled centrifugal extraction and enrichment was established. A demonstration line of 1200 m3 rare earth leaching solution was established in the Chongzuo Six Tang Rare Earth Mine in Guangxi, and continuous stable operation was achieved. Compared with the traditional process, the process was reduced by 5 processes. , rare earth leaching solution (REO 0.2-1 g / L) direct extraction and enrichment to produce high concentration of rare earth chloride (REO 230g / L), the total rare earth recovery rate increased by more than 8%, the raffinate phosphorus content can be reduced to 1mg / Below L, the cycle is used for leaching, which can solve the problem of ammonia nitrogen pollution and disposal of radioactive waste residue that plague the rare earth industry from the source, and the cost is greatly reduced.
Furthermore, the original technology of saponification extraction separation and precipitation recovery of rare earth from high-purity magnesium bicarbonate solution was proposed and developed. The low-cost recovery of magnesium chloride wastewater and CO2 gas produced by rare earth separation and purification process was used for continuous carbonization and scale preparation. Magnesium bicarbonate solution, instead of liquid ammonia, liquid alkali, ammonium bicarbonate, etc., is applied to rare earth extraction separation and precipitation recovery of rare earths. From the source, in addition to ammonia nitrogen wastewater pollution, the problem of reducing high salinity wastewater and CO2 greenhouse gas emissions is reduced. Jiangsu Guosheng Rare Earth Company rebuilt 2000 tons/year scale rare earth separation production line and Guangxi Guosheng Rare Earth Company to build a 3000 tons/year scale rare earth separation production line and realized continuous scale production; developed 4N grade ultra-high purity rare earth metal integrated preparation technology, independent Designed and developed 14 sets of high-purity and high-vacuum special purification equipment for high-purity rare earth metals. Integrated and innovative 3 sets of engineering technology covering 16 kinds of rare earth metals for efficient preparation and purification, 13 kinds of absolute purity up to 4N, relative purity Achieve 5N ultra-high purity rare earth metal and build the first ultra-high purity rare earth metal in China Production line.
The experts at the meeting agreed that the new technology of green high-efficiency leaching integration of ionic rare earth ore is much simpler than traditional technology, the process is greatly simplified, the cost is greatly reduced, and the production process does not produce ammonia nitrogen wastewater and radioactive waste slag pollution, which is the production of ionic rare earth ore. A major change in the process, the result is overall ahead of the world's rare earth metal smelting technology level; low carbon, low salt and ammonia-free nitrogen separation and purification of rare earth new process for the first time in a cycle of pure magnesium bicarbonate solution for saponification organic phase extraction and separation of rare earth elements The rare earth precipitation crystallization process realizes the zero-emission of ammonia nitrogen, the closed-circuit recycling of magnesium salt wastewater and CO2, and reduces the production cost of rare earth, improves the competitiveness of production enterprises, and further consolidates China's leading position in the world of rare earth smelting and separation. The results are overall ahead of the world's rare earth metal smelting and separation technology; 4N grade ultra-high purity rare earth metal integrated preparation technology has broken the foreign blockade of China's products, preparation technology and key equipment, and will guide China's rare earth industry to high-end functional materials. And the field of device manufacturing has leapfrogged.
Poly Aluminium Chloride is referred to as PAC. It is also commonly called basic aluminum chloride or coagulant. It is a new type of high-efficiency inorganic polymer flocculant. Its aqueous solution is a hydrolysis product between aluminum trichloride and aluminum hydroxide, with a colloidal charge, so it has a strong adsorption on suspended matter in water. To achieve the purpose of condensing suspended matter in water. The Polyaluminium Chloride produced by Jinhe are white, yellow or light yellow powder.
Polyaluminum Chloride has the functions of removing suspended matter, COD and BOD, degreasing, decoloring, removing heavy metals and residual chlorine in water, etc. It is mainly used for purification treatment of tap water and industrial wastewater. Polyaluminum chloride is currently the most widely used inorganic coagulant in water purification processes. There is no need to adjust the pH value of the source water, it has a wide range of adaptation to the pH value of the source water, which is unmatched by traditional inorganic low molecular coagulants.
Polyaluminium Chloride is used in metallurgical, electric power, tanning, medicine, printing and dyeing, papermaking, chemical and other industries` sewage treatment.It`s also used in tap Water Treatment. Its coagulation effect forms flocs (also known as alum flowers) fast, the particles are large and heavy, and the sedimentation is fast. The applicable PH value ranges from 5 to 9, and has the characteristics of low dosage, low cost, high activity, convenient operation, wide adaptability, and low corrosion.
Poly Aluminium Chloride,White Poly Aluminium Chloride,Yellow Poly Aluminium Chloride,Brown Poly Aluminium Chloride
HENAN JINHE INDUSTRY CO.,LTD , https://www.hnchromiumoxidegreen.com