ABSTRACT

A modification coarse coal-slime separation process used three-stage cone water-only cyclones (TWOCs) as the main separating equipment was designed and evaluated for Lv-jiatuo coking-coal preparation plant. Laboratory experiment was performed to guide the parameters determination of the industrialness TWOC. The industrialess TWOC is expanded five times according to the equal proportion of the laboratory TWOC. The stability of the modification system is obviously higher than that of the original system, the optimal parameters combination of the industrialness TWOC was determined as 500 mm cylinder height, 225 mm vortex finder, 267 mm insertion-depth of the vortex finder and 0.08 MPa feed pressure. After the modification, the clean-coal ash decreases from about 13.00% to 11.45%, the separation density (δ₅₀) and possibility deviation (E_P) value of the TWOC are 1.49 and 0.085 g/cm³, respectively. Plant’s yearly profit increases 13.54 million Chinese yuan (CNY), the static investment recovery period is 0.22 years.

摘要

为吕家沱炼焦煤选煤厂设计并评价了以三级锥形纯水旋流器（TWOCs）为主要分离设备的改进型粗煤泥分离工艺。进行了实验室实验以指导工业性TWOC的参数确定。工业级TWOC按照实验室TWOC等比例扩容5倍。改型系统的稳定性明显高于原系统，工业化TWOC的最优参数组合确定为500 mm缸高、225 mm涡流器、267 mm涡流器插入深度和0.08 MPa进给压力。改质后，净煤灰分由约 13.00% 降低至 11.45%，分离密度（δ _{50) 和TWOC}的可能性偏差 ( EP) 值分别为 1.49 和 0.085 g/cm ³。工厂年增利1354万元，静态投资回收期0.22年。