Research is made on the process for production of high-quality coarse-grained WC.

In order to make a study of the feasibility and each technical parameter in coarse floatation,based on detailed theoretical analysis,a laboratory device is designed for slurry test.

The coarse TATB was synthesized after continuous stirring a period of time at 155 ℃ when anhydrous-gaseous ammonia with 0.

Combined with the special flotation behavior of coarse particles and the technology of conventional mechanical flotation machine,through abundant lab-based experiments,the article has confirmed the overall structure feature of mechanical flotation machine for coarse particles,which has been demonstrated by the afterwards quasi-industrial test.

It is significative in mining Engineering to investigate the friction loss of coarse particle slurry in horizontal pipeline, but the research on this respect is not perfect.

Hydraulic hoist of solid coarse particles in the vertical pipe is used in oil extraction, chemical engineering, ocean mining, coal mining and silt cleanup and so on.

The pressure gradients of air-sand two-phase flow in a CFB riser were systematically measured in a 10m high CFB riser to investigate the axial distributions of averaged solids holdups of coarse particles and the effects of operation conditions.

To investigate the flow behaviors of coarse particles in CFB, the local solid concentrations of sands in a Φ100 mm×10 m CFB riser were systematically measured by an improved fiber-optic probe.