Technology progress on the production of feed-grade calcium hydrogen phosphate;

Technical measures for reducing production costs of feed-grade calcium hydrogen phosphate by dilute phosphoric acid method

Study on new process for producing feed-grade calcium hydrogen phosphate by hydrochloric acid method;

A new process for producing feed-grade calcium hydrogen phosphate by using chlorhydric acid;

Technology for production of feed-grade calcium hydrogen phosphate by defluorination of ground phosphate rock;

The reactive model of SiO 2 in production of feedgrade dicalcium phosphate, and the effect of pH on the process of gelification of silica gel are discussed, also the distribution and form of SiO 2 is studied and ultimately the elimination methods of SiO 2 is given.

The effective measures are studied to lower sulfuric acid consumption, raise feedfertilizer ratio, and diminish P\-2O\-5 loss in production of feedgrade dicalcium phosphate from wetprocess phosphoric acid.

The improvement experience of the engineering development on feedgrade dicalcium phosphate is reviewed.

Determination of trace lead in feed-grade dicalcium phosphate by hydride generation atomic absorption spectrometry

Under the optimal process, the feed-grade dicalcium phosphate could be produced by neutralization of the leach liquor with calcium hydroxide solution, filtration and then dryness.

A fodder calcium phosphate with a quality of former Soviet Union nationl standard was produced from Yunnan apatite comcentrates mixing with sodium sulphate, silicate and additives A and B by calcine method in reverberatory furnace.