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Experimental study of dry permanent magnet magnetic separation of high-sulfur fine coal

机译：高硫细煤干燥永磁磁分离的实验研究

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Dry magnetic separation of high-sulfur fine coal was carried out using a novel permanent magnet high-gradient magnetic separator (HGMS). The samples were analyzed using a vibrating sample magnetometer (VSM) and X-ray diffractometer (XRD) to determine the properties of the different size fractions of pulverized coal. It was found that magnetic susceptibility and the ash and sulfur content increased with increasing particle size below 0.9mm; Sulfur reduction of 44% and ash reduction of 43% were obtained from coal with particle size of 0.15∼0.074 mm, while the clean coal yield reached 95.61%. The results show that desulfurization efficiency and de-ashing efficiency decreased with increasing size of the pulverized fine coal from 53% to 37% and from 49% to 32%, respectively. Desulfurization efficiency and de-ashing efficiency of fine coal were significantly improved by permanent magnet dry magnetic separation using a new permanent magnet HGMS. However, decreases in desulfurization efficiency and de-ashing efficiency of the different size coal samples were found to correlate with reduced clean coal recovery, besides coal fraction sized at 0.0–0.074 mm.
机译：使用新型永磁体高梯度磁性分离器（HGMS）进行高硫精细煤的干磁分离。使用振动样品磁力计（VSM）和X射线衍射仪（XRD）分析样品，以确定粉煤的不同尺寸分数的性质。发现磁性敏感性和灰分和硫含量随着粒径的增加而增加，低于0.9mm;减少44％和灰分减少43％，煤尺寸为0.15~0.074mm，而净煤收益率达到95.61％。结果表明，脱硫效率和去灰度效率随着粉碎细煤的尺寸的增加，分别从53％到37％和49％至32％。通过使用新的永磁体HGMS，通过永磁干磁分离显着改善细煤的脱硫效率和脱灰效率。然而，除了在0.0-0.074mm的煤馏分外，发现不同尺寸煤样的脱硫效率和不同型煤样品的脱硫效率与降低的煤炭回收率相关。

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