Proper sodium sulphide can increase the floating speed of Cu mineral in slag and Cu grade of concentrate on the premise that the desired recovery is gained.
探讨了硫化钠的作用机理，硫化钠可提高铜矿物浮游速度，在预期回收率前提下提高铜精矿品位。
2
High-grade passenger car abroad adopts floating floor with high performance of vibration absorption and sound insulation.
国外高档客车均采用浮筑地板，浮筑地板具有良好的减振、隔声性能。
3
All sand grains are quartz sands. Sorting and roundness and sphericity of particles are in good grade-level. Quartz sands are scattered in microcrystalline dolomitic sands in floating state.