Influence of Hyperbranched DHBC with Carboxyl Terminal Groups on the Crystallization of CaCO3;

By compounding nano-CaCO3 with polyoxymethylene (POM) , the influence of nano-CaCO3 content, diameter on the mechanical properties, dispersion morphology of POM/nano-CaCO3 composties was investigated.

Polypropylene(PP) and CaCO3 blends were extruded in self-made dynamic capillary rheometer, and the effects of vibrating parameters on the dispersion of CaCO3 in melted PP were studied.

Relationship of calcium carbonate content and water regime to bicarbonate content in the growth medium;

The flow field in liquid Wood's metal with centric gas bottom-blowing was predicted by a mathematical model.

The critical value of liquid steel drawing slag is calculated out according to the relation between the bottom-blowing gas quantity of ladle and flowing speed on interface between molten steel and slag.

Realization of control programs of bottom blowing for No.1 converter in Baogang;

Reform of computer controlling system of converter bottom blowing;

The design and application of an automatic control system for the bottom blowing of a combined top-bottom blown converter;

In the present study,a water model of slag ladle was used with a photographic technique to determine the effect of viscosity and bottom stirring gas flow rate on surface spout characteristics of the solution.

Over all and free surface gas liquid volumetric mass transfer coefficient in water model which is 1∶7 scale of 30 t bottom stirring EAF is determined from the relations of pH value and CO 2 content.