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    Home > Active Ingredient News > Feed Industry News > Experts call for the development of feed grade dicalcium phosphate by hydrochloric acid method (10.27)

    Experts call for the development of feed grade dicalcium phosphate by hydrochloric acid method (10.27)

    • Last Update: 2003-03-12
    • Source: Internet
    • Author: User
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    OA show ('918 '); due to the influence of technology and other factors, on the whole, domestic feed grade dicalcium phosphate can not meet the development needs of domestic feeding industry in terms of output and quality Experts therefore call for the development of hydrochloric acid feed grade dicalcium phosphate At present, in the production of feed grade dicalcium phosphate in China, how to defluorinate and solve the waste residue in the production process is a common problem encountered by many enterprises In order to strengthen the management of various feed additives, the relevant departments of the state have formulated strict inspection standards for the quality of feed grade dicalcium phosphate products, so as to promote production enterprises to attach importance to product quality and ensure people's health Among them, fluorine content is a main index Because the fluorine content of the product is not up to the standard, it affects the expansion and development of some enterprises At present, many enterprises still use the traditional defluorination method, mainly in the extraction of acid solution by chemical precipitation With this method, due to the influence of temperature and the quality of phosphate rock powder, the effect of defluorination is not stable, so the content of fluorine in the product is often difficult to reach the standard issued by the original Ministry of chemical industry Some enterprises adopt the traditional two-stage neutralization method After one-stage neutralization and defluorination, although the fluorine content in products can reach the standards issued by the Ministry, the disadvantage of this method is that only about 60% of the available phosphorus in phosphoric acid can form feed grade calcium hydrophosphate, and about 40% of the available phosphorus can form fertilizer grade calcium hydrophosphate At present, this kind of fertilizer is not used in rural areas, which will not only cause waste of resources And it's polluting the environment In order to solve the above problems, some domestic research institutions have carried out in-depth research on the defluorination method of feed grade dicalcium phosphate Among them, the Industrial Development Corporation of Hebei University of science and technology has developed a compound precipitation defluorination technology for the production of feed grade dicalcium phosphate with wet process phosphoric acid This technology can increase the conversion rate of effective phosphorus in the wet extraction of phosphoric acid to 85% - 95%, and does not produce fertilizer grade calcium hydrophosphate The fluorine content in the product is up to the standard issued by the original Ministry of chemical industry, that is no more than 0.18% This method is not affected by the environment, humidity and the quality of phosphate rock powder It has stable defluorination performance, simple operation and low unit consumption Under the same input of raw materials, the output can be increased by 20% - 30% At present, the technology has been applied for national patent Another characteristic of this technology is to produce feed grade dicalcium phosphate with hydrochloric acid as raw material This provides a new way for some chemical plants to digest by-product hydrochloric acid At present, most chemical enterprises use the method of direct sales to digest the by-product hydrochloric acid However, it is often limited by hydrochloric acid concentration, region and season, which makes it difficult to sell hydrochloric acid, forms pressure storage, and then affects the production of leading products, and also causes environmental pollution The new technology of producing feed grade dicalcium phosphate by wet process phosphoric acid can not only digest a large amount of by-product hydrochloric acid, but also produce high quality quicksand feed grade dicalcium phosphate that meets the export standard, creating a new economic growth point for enterprises Shandong Dongyue chemical group is the main manufacturer of organic fluorine products in China Its products are sold to many well-known domestic refrigeration equipment manufacturers, but the production of leading products is often affected by the by-product hydrochloric acid pressure storage In May 1998, the company adopted the new technology developed by Hebei University of science and technology to build a set of feed additive production device with an annual output of 5000 tons, which can consume 20000 tons of hydrochloric acid with an annual concentration of 18% - 20%, completely solving the pressure caused by hydrochloric acid TDI project of Hebei Cangzhou Dahua Group Co., Ltd is to find a way out for by-product hydrochloric acid This new technology is also used to build a set of feed grade calcium hydrophosphate production device with an annual output of 10000 tons, which can digest 30% by-product hydrochloric acid with a concentration of 30000 tons China feed industry information network Dfj (author:)
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