{"id":679,"date":"2023-11-11T22:05:44","date_gmt":"2023-11-11T14:05:44","guid":{"rendered":"http:\/\/47.94.145.50\/?page_id=679"},"modified":"2023-11-20T17:38:39","modified_gmt":"2023-11-20T09:38:39","slug":"coke-coal","status":"publish","type":"page","link":"http:\/\/hssgroup.cn\/index.php\/metals-minerals\/coke-coal\/","title":{"rendered":"Coke & Coal"},"content":{"rendered":"\n
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Coke<\/strong><\/p>\n<\/div>\n\n\n\n

Metallurgical coal, also called metcoal or coking coal, is a type of coal that is used in the production of steel. It is of a higher purity than thermal coal which is used in energy generation. To make steel, metcoal is heated at around 1100 degrees C to remove water and other chemicals. This is done without the presence of oxygen. The result is a lump of near-pure carbon which is called coke.<\/p>\n\n\n\n

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Coke for metallurgy<\/strong><\/p>\n\n\n\n

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Chemical composition<\/strong><\/td>Class 1<\/td>Class 2<\/td>Class3<\/td><\/tr>
Ad<\/td><12<\/td><13.5<\/td><15<\/td><\/tr>
Std<\/td><0.06<\/td><0.8<\/td><1.0<\/td><\/tr>
M40<\/td>>80<\/td>>76<\/td>>72<\/td><\/tr>
CRI<\/td><30<\/td><35<\/td><30<\/td><\/tr>
CSR<\/td>>55<\/td>>50<\/td><\/td><\/tr>
Vdaf<\/td><1.8<\/td><1.8<\/td><1.8<\/td><\/tr>
M<25mm<\/td><4<\/td><5<\/td><5<\/td><\/tr>
M>25mm<\/td>>40<\/td>>40<\/td>>40<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n
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Coal<\/strong><\/p>\n\n\n\n

The classification of Chinese coal is based on the volatile matter content, dividing all coal into Lignite, Bituminous coal, and Anthracite.<\/strong> <\/p>\n\n\n\n

For lignite and anthracite<\/strong>, they are further divided into 2 and 3 subcategories respectively based on their coalification degree and industrial utilization characteristics. <\/p>\n\n\n\n

Bituminous coal<\/strong> is divided into low, medium, medium-high, and high volatile matter bituminous coal according to the volatile matter content in four stages: >10%-20%, >20%-28%, 28%-37%, and >37%. As for the caking property of bituminous coal, it is classified according to the caking index G: 0-5 for non-caking and weakly caking coal; >5-20 for weakly caking coal; >20-50 for moderately weakly caking coal; >50-65 for moderately strong caking coal; and >65 for strongly caking coal. Among the strongly caking coal, those with the maximum vitrinite reflectance Y >25mm or ovoid texture b >150% (for bituminous coal with Vdaf>28%, b>220%) are classified as extra-strongly caking coal. In the naming of coal types, considering the continuity of the old and new classifications, eight coal types are retained: gas coal, fat coal, coking coal, lean coal, poor coal, weakly caking coal, non-caking coal, and long-flame coal.<\/p>\n<\/div>\n\n\n\n

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Lignite<\/strong><\/p>\n\n\n\n

Grade<\/strong><\/td>PM%<\/strong><\/td>Qgr,maf(MJ\/kg)<\/strong><\/td><\/tr>
HM1<\/td>>0~30<\/td>–<\/td><\/tr>
HM2<\/td>>30~50<\/td><24<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Anthracite<\/strong><\/strong><\/strong><\/p>\n\n\n\n

Grade<\/strong><\/td>Vdaf%<\/strong><\/td> Hdaf%<\/strong><\/td><\/tr>
WY1<\/td>0~3.5<\/td>0~2.0<\/td><\/tr>
WY2<\/td>>3.5~6.5<\/td>>2.0~3.0<\/td><\/tr>
WY3<\/td>>6.5%~10<\/td>>3.0<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n
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Bituminous coal<\/strong><\/p>\n\n\n\n

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Nam<\/strong>e<\/td>Vdaf%<\/strong><\/td>GRL<\/strong><\/td>Ymm<\/strong><\/td> b%<\/strong><\/td><\/tr>
PM<\/td>>10~20<\/td><5<\/td><\/td><\/td><\/tr>
PS<\/td><\/td>5~20<\/td><\/td><\/td><\/tr>
SM<\/td><\/td>20~65<\/td><\/td><\/td><\/tr>
JM<\/td>>10~28<\/td>>65<\/td><25<\/td><150<\/td><\/tr>
FM<\/td>>10~37<\/td>>85<\/td><25<\/td>>220<\/td><\/tr>
1\/3JM<\/td>>28~37<\/td>>65<\/td><25<\/td><220<\/td><\/tr>
QF<\/td>>37<\/td>>85<\/td>>25<\/td>>220<\/td><\/tr>
QM<\/td>>28~37<\/td>>35~65<\/td><25<\/td><220<\/td><\/tr>
1\/2ZN<\/td>>20~37<\/td>>30~50<\/td><\/td><\/td><\/tr>
RN<\/td>>20~37<\/td>>5~30<\/td><\/td><\/td><\/tr>
BN<\/td>>20~37<\/td><5<\/td><\/td><\/td><\/tr>
CY<\/td>>37<\/td><5<\/td><\/td><\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n
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