Yangjiazhangzi Concentrator Wet Workshop

Yangjiazhangzi beneficiation plant: Yangjiazhangzi processing plant was built in 1966, a wet workshop, molybdenum ore processing, production of industrial ammonium.

Ammonium molybdate production process:

1) Sodium hypochlorite leaching: reaction formula

MoS2+9NaClO+6NaOH→Na2MoO4+Na2SO4+9NaCl+3H2O

2) Calcium molybdate precipitation: adjust the pH to 5~6 with hydrochloric acid, add CaCl2, boil with steam, and precipitate calcium molybdate.

3) Soda leaching calcium molybdate: reaction formula

CaMoO4+Na2CO3↔Na2MoO4+CaCO3↓

4) Precipitated molybdic acid: hydrochloric acid is added to a pH of 0.5, the temperature is above 95 ° C, and the precipitation rate is generally above 95%.

5) Ammonia water dissolves molybdic acid: To accelerate the reaction, the dissolution should be carried out at a temperature of 70 to 80 °C.

6) Precipitating ammonium molybdate: Ammonium molybdate solution is added to hydrochloric acid at a temperature of 30 to 40 ° C to a pH of about 2.5 to precipitate a white crystal precipitate. The precipitation rate can reach more than 96%. After being dehydrated, dried and pulverized by a centrifuge, it is a finished product. The production process is shown in the following figure: