Preparation method of semi-coke

The invention provides a preparation method of semi-coke. The preparation method comprises the following steps of mixing direct coal liquefaction oil residue and cleaned coal, so as to obtain a mixture; pyrolyzing the mixture, so as to obtain the semi-coke. The preparation method has the advantages that the direct coal liquefaction oil residue and the cleaned coal are used as the raw materials toprepare the semi-coke; by using the direct coal liquefaction oil residue and the cleaned coal to prepare the semi-coke, the harmless treatment can be performed on the direct coal liquefaction oil residue, and the characteristics of high calorific value and high oil content are fully utilized; the operation is simple, and the preparation method is suitable for industrialized application in a large-scale way. 本发明提供了种兰炭的制备方法。该方法包括：将煤直接液化油渣和洗精煤混合，得到混合物；将混合物进行热解反应，得到兰炭。该方法是以煤直接液化油渣和洗精煤为原料制备了兰炭。通过与洗精煤起制备兰炭，可以对煤直接液化油渣进行无害化处理，并充分利用其高热值、高含油量的产品特点。而且，本发明提供的兰炭制备方法操作简单，可以在工业上大规模应用。