Feed grade monocalcium phosphate and preparation method thereof

Abstract

The invention discloses a feed grade monocalcium phosphate, which comprises the following components by weight: 20-30 parts of phosphate rock, 5-15 parts of calcium hydroxide, 5-15 parts of calcium carbonate, 5-15 parts of sulfuric acid, 5-15 parts of industrial waste acid, and 2-6 parts of activated carbon particles. The method provided by the invention has the advantages of simple process, easy implementation, wide raw material sources, shortened production time, low energy consumption and low cost, is suitable for large-scale industrialized production, and has broad market prospects and good social and economic benefits.

Description

technical field [0001] The invention relates to feed grade calcium dihydrogen phosphate and a preparation method thereof, belonging to the technical field of feed additive production. Background technique [0002] The main varieties of feed grade calcium phosphate salts are tricalcium phosphate, calcium hydrogen phosphate, and calcium dihydrogen phosphate, all of which are nutritional additives of mineral elements. Among them, calcium dihydrogen phosphate (MCP) is an excellent high-efficiency phosphate feed additive with high phosphorus content and high water solubility, and is widely used as a feed additive for aquaculture animals and livestock and poultry animals. Due to the high water-soluble phosphorus content of calcium dihydrogen phosphate, which accounts for more than 90wt% of total phosphorus, it is beneficial to the absorption of calcium and phosphorus by aquatic animals. The digestion and absorption rate is above 90%, and the excretion is small, which is beneficial...

AI Technical Summary

Problems solved by technology

Among them, the wet process is to add solid raw materials to the phosphoric acid solution prepared by the wet process to generate calcium dihydrogen phosphate dissolved in water. After vacuum concentration, cooling and crystallization, calcium dihydrogen phosphate crystals are precipitated, and then dried, crushed and sieved To obtain the product, the method has long technological process, large phosphorus loss, high energy consumption, large investment, small production capacity, and high cost.

The dry process is to use the phosphoric acid produced by the thermal method to react with solid materials such as CaCO3 to obtain the calcium dihydrogen phosphate slurry, and then obtain the product through drying, crushing, and screening. This method has the disadvantages of large equipment volume, small particle size, and power Insufficient consumption

Therefore, in the prior art, there are generally characteristics such as long process flow, high energy consumption, large investment and low productivity.