螺旋分选机分选界面煤的灰分和硫分分布研究

Study on ash and sulfur distribution of coal at the sorting interface of spiral sorter

为充分利用资源、优化产品结构,采用定点定距断面取样法,研究了螺旋分选机出料端流膜界面的灰分和硫分分布规律。在出料端,螺旋分选机已形成稳定的流膜分选层。在垂直与流体运动方向,自内而外每30 mm对物料进行采样化验。结果表明:螺旋分选机产品的灰分在分选流膜界面上自内到外呈先降低后升高再降低,产品的硫分在分选流膜界面上自内到外呈现先升高后降低再升高,灰分和硫分分布存在高度对称性的规律。根据试验结果,设计截取器,合理调整截取器位置,螺旋精煤灰分降低了0.2%。

In order to make full use of the resource endowment and optimize the product structure,the fixed-point and fixed-distance section sampling method was used to study the distribution of ash and sulfur at the flow film interface at the discharge end of the spiral separator.At the discharge end,the spiral separator has formed a stable flow film separation layer.The material was sampled and tested every 30 mm from the inside out,perpendicular to the direction of fluid movement.The test results show that the ash content of the spiral separator product at the separation flow film interface first decreases,then rises and then decreases from the inside to the outside,and the product sulfur content first rises and then decreases at the separation flow film interface from the inside to the outside.If it increases again,the distribution of ash and sulfur has a high degree of symmetry.According to the experimental results,the interceptor was designed,the position of the interceptor was adjusted reasonably,and the ash content of spiral clean coal was reduced by 0.2%.