Dry Preparation Technology of Coal Dressing with Online Measurement to Control the Layer Density
Introduces a device using in the dry preparation technology of coal dressing with online measurement to control of the density in the layer, and also provides a method to online monitor the density in the layer. This device achieves the automation in the dry preparation technology of coal dressing. In the different materials within the layer, the radiation is absorbed and the absorption amount is highly depending on the nature of the materials, such as mass and density of a particular material. Based on the absorption nature of the γ radiation ray from Cs-137, we are able to measure the thickness of the bed depth and as well as the density of the material inside the bed depth. When the sensor receives the signal, it is magnified and transmitted into the density meter. The microprocessor embedded in the density meter can perform the mathematical calculation and eventually obtain the weight average value of the unknown materials density. Based on the dynamic data of the physical density, the control system auto tunes the speed of the opening by utilization of a frequency governor. Therefore, it controls the thickness of the bed depth very precisely and achieves the close loop control in the dry preparation system of coal dressing.
Density Dry preparation technology of coal dressing Radiation source The γ-radiation ray Signal
Liu Weisheng
Division of Electrical Information Science & Technology, Department of Physics, Tangshan Teachers College, Tang shan, China 063000
国际会议
沈阳
英文
409-412
2009-08-27（万方平台首次上网日期，不代表论文的发表时间）