Method for preparing formed coke from low-metamorphic pulverized coal, heavy oil and tar residues as raw materials

The invention provides a method for preparing formed coke from low-metamorphic pulverized coal, heavy oil and tar residues as raw materials. The method comprises the following steps: firstly, grinding and sieving the low-metamorphic pulverized coal to obtain a raw material powder having a certain particle size, next, evenly mixing the low-metamorphic pulverized coal, the heavy oil and the tar residues together, performing pressure forming in a forming die, performing drying and strengthening treatment on the prepared briquette coal under a low temperature condition, and putting the treated briquette coal into a destructive distillation device for pyrolysis, thereby obtaining the formed coke, coal tar and gas, wherein the gas can be taken as a fuel gas or a chemical raw material gas; and the liquid oil is treated by fractionation to obtain a heavy oil and a light oil, the light oil is treated by hydrogenation for producing a fuel oil, and the heavy oil and the tar residues can be recycled to the briquette coal preparation process. The method is mainly applied to the medium-low temperature pyrolysis and upgrading and grading of the low-metamorphic pulverized coal, and is capable of recycling the tar and the hydrogen-enriched gas in the pulverized coal to the utmost extent while obtaining the formed coke product; and in short, the method has the characteristics of simple process, high production efficiency, high pyrolysis speed, good forked coke strength, good formed coke strength and high light oil yield.