phosphorous 专八

Principle and operation technology of removing silicon,phosphorous and arsenic from sodium wolframate is presented.

阐述了钨酸钠溶中除硅、磷、砷的原理,并提出了具体的操作工。

At the same time of adding neutralizing agent the basic fertilizer containing nitrogen, phosphorous and potassium can be added so as to obtain the invented azophoska.

明还可在加入中和剂的同时加入含氮、磷、钾的基础肥料制成氮磷钾复合肥料。