CAJ | 학술논문

为提高细粒煤的脱硫率和脱灰率，以甘肃中硫煤经跳汰机处理后的细粒煤为试验煤样，进行磨矿-磁选试验、高精度磁选试验和磁选精煤再浮选试验。结果表明，磁通密度1.57 T，脉冲强度25次/ min，采用细网不加铜套聚磁介质时，煤泥磁选效果最好，精煤硫分为1.25%，精煤产率达到95%，煤样损失量最小。在最佳磁选条件下进行磁选精煤再浮选试验，CaO 用量1 kg / t，煤油用量1360 g / t时，煤泥浮选效果最好，得到硫分1.09%，灰分7.54%的精煤，精煤脱硫率为32.05%，脱灰率为45.63%，黄铁矿硫脱除率为50.55%。细粒煤磁选-浮选试验数质量流程表明，原煤经跳汰—破碎—筛析—磁选—浮选后，可获得产率86.03%，硫分1.09%，灰分7.54%的精煤产品，基本达到矿山要求。
위제고세립매적탈류솔화탈회솔，이감숙중류매경도태궤처리후적세립매위시험매양，진행마광-자선시험、고정도자선시험화자선정매재부선시험。결과표명，자통밀도1.57 T，맥충강도25차/ min，채용세망불가동투취자개질시，매니자선효과최호，정매류분위1.25%，정매산솔체도95%，매양손실량최소。재최가자선조건하진행자선정매재부선시험，CaO 용량1 kg / t，매유용량1360 g / t시，매니부선효과최호，득도류분1.09%，회분7.54%적정매，정매탈류솔위32.05%，탈회솔위45.63%，황철광류탈제솔위50.55%。세립매자선-부선시험수질량류정표명，원매경도태—파쇄—사석—자선—부선후，가획득산솔86.03%，류분1.09%，회분7.54%적정매산품，기본체도광산요구。
In order to improve desulfurization and deashing efficiency of fine coal,taking the fine coal which was prepared by jigging medi-um-sulfur Gansu coal as research object,the grinding-magnetic separation test,high precision magnetic separation test and clean coal re-flotation test were conducted. The results showed that,when magnetic flux density was 1. 57 T,pulse strength was 25 times in one minute, fine mesh wasnˊt added copper sleeve poly magnetic medium,the flotation effects was the best. The sulfur content and yield of clean coal was 1. 25% and 95% ,the loss of coal samples was the least. The reflotation test on clean coal was conducted under optimum condition, when the dosage of CaO and kerosene was 1 kg/ t and 1360 g/ t,the sulfur and ash content of clean coal could decreased to 1. 09% and 7. 54% . The desulfurization and deashing efficiency was 32. 05% and 45. 63% ,the removal efficiency of pyrite was 50. 55% . The experi-mental results showed that,the jigging-breaking-screening-magnetic separation- flotation process could reduce the sulfur and ash content of clean coal to 1. 09% and 7. 54% and improve the yield of clean coal to 86. 03% .