配煤降低高灰熔融性淮南煤灰熔点的研究

Coal blending to reduce the ash fusion temperature of high fusability Huainan coal

对高灰熔融性淮南煤和低灰熔融性煤进行了配煤降低灰熔点的研究 .研究表明 ,配煤可以显著降低高灰熔融性煤的灰熔点 ,降低或免去添加助熔剂 ,配合煤灰熔点变化并不是两种煤的灰熔点加和值 ,而是非加和性的 .煤中灰成分对灰熔点有很大影响 ,配煤的灰成分具有加和性 .添加适当的助熔剂是高灰熔融性煤的配煤制浆的较佳选择 .配煤的制浆浓度是非加和性的 ,利用两种煤的优势可以有效地提高难成浆煤种的制浆浓度 ,一般可以提高 3%～ 5 % .

The ash fusion temperature of high ash fusability Huainan cleaning coal blended with four low ash fusability coals were studied. The results indicate that the ash fusion point of Huainan coal can be reduced effectively by coal blending. A low ash fusion coal can provide the flux for high ash fusion coal, which can reduce or eliminate the need to add a flux. The changes of ash fusion point for two blended coals are nonadditivity.The ash fusion points are influenced largely by coal ash components. In order to increase the proportion of high fusion Huainan coal in TEXACO coal water mixture (CWM) gasifier, the addition of flux is needed. The effects of coal blending on the features of CWM are also nonadditivity. The concentration of CWM can be increased effectively for coals which have difficulty in preparing slurry by coal blending, generally 3%～5%.