Considering the energy-consumed, operation and indium leaching rate, the optimum process conditions are as follow: reaction time 80 min, the initial concentration of acid 9.92 mol/L, liquid-solid ratio 4, particle graininess 0.175~0.370 mm, stirring speed 450 rpm.
The heating oxidation dacomposition is put forward to be used for decreasing of oxygen and removing magnesium from insoluble compounds,such as B_6O, B_7O, MgB_x formed in reaction. The technological conditions and results have been tested. The pure boron powder obtained contains B>95%, Mg <0.7%.
A new technology for extracting hydrated TiO_2 by boiling acid-leach liquor produced by H_2SO_4 leaching of Ti-bearing BF slag was researched. The optimal technological conditions determined by orthogonal experiment were as follows:hydrolyzing temperature 100℃,ageing time 20h,acidity coefficient 1.1,ageing temperature 20℃,TiO_2 concentration 101.50g/L,hydrolyzing time 140min.
The technological condition of separating U and Zr in sulphuric acid solution (3-5N) were studied. The synergistic extraction system of P291+TRPO offered high selectivity for extraction of uranium has been found.
Through the reseach on averege heat flux into the mould of continuous slab caster at MASTEEL, it is concluded that in the existing technological condition of MASTEEL , the appropriate water flow of the wide side is 170 ~ 175m3/h;
It was found that the character of conductivity decay in a photoreceptor after positive or negative corona charging of its outer surface depended on the technological conditions of substrate pretreatment.
Using this method makes it possible to substantiate the choice of the optimal design of contact units in cascade pneumatic classifiers for various technological conditions.
Phase composition of Ti-C Films obtained under the technological conditions of diamond formation at a carbon content of above 50
Thin (6-12 nm) epitaxial MnAs films were MBE-grown on Si(111) substrates under different technological conditions.
The electrophysical and photoelectric properties of the films depend on the technological conditions of growth and are determined by states at intergrain boundaries.