炼焦用煤是指适于炼制冶金焦炭的煤。炼焦炉炼焦条件下，用于生产一定质量焦炭的原料煤。为保证焦炭质量，选择炼焦用煤的最基本要求是考察它的挥发分、粘结性和结焦性，保证尽可能低的灰分、硫分和磷含量。因此，绝大部分炼焦用煤必须经过洗选。
粘结性是煤的一项重要的工艺性质，是炼焦用煤的主要参考指标。
The effect of caking property is ignored commonly in existence indexes on ignition and burn out.
粘结性是煤的一项重要的工艺性质，是炼焦用煤的主要参考指标。
Caking property is an important technological characteristic for coal. It is an main reference index for metallurgical coal.
研究应用非炼焦煤炼焦，对降低炼焦成本、扩大炼焦用煤资源意义重大。
In this situation, study on application of non-coking coal in coking is very important to expand the coking coal resources and reduce the cost of coking.
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