After decomposing the sample by dry method, dissolve the residue with sulfuricacid and ammonium sulfate, and test it.
试样以干法分解，以硫酸，硫酸铵溶解残渣后进行测试。
2
Preliminary test indicates that most of sulfuricacid can be separated and recovered by diffusing dialysis process. Consequently, the alkali consumption is reduced in uranium precipitation process.
初步试验表明，扩散渗析可以用来分离回收其中大部分的硫酸，从而降低溶液的酸度，减少沉淀产品的碱耗。
3
The test of leaching rate on zinc sulfide concentrate in Shaanxi province with sulfuricacid, oxygen and catalyst has been taken.