Method for preparing calcium carbide furnace material from low-rank coal, and composite binder

The present invention provides a method for preparing a calcium carbide furnace material from low-rank coal, and a composite binder. The composite binder comprises a main adhesive and an adhesion aid, wherein the main adhesive is medium-temperature coal pitch, the adhesion aid is dianthracene oil or dianthracene oil component oil, and a mass ratio of the main adhesive to the adhesion aid is 1:0.1-0.5. The method for molding low-rank coal powder and quick lime powder by using the composite binder and preparing a calcium carbide furnace material comprises: uniformly mixing low-rank coal powder and quick lime powder according to a certain ratio, adding the composite binder, and mixing, wherein the adding amount of the composite binder is 18-28% of the total mass; conveying the molding material into molding equipment, molding, and demolding to obtain calcium briquettes; and conveying the calcium briquettes into a pyrolysis device, and carrying out pyrolysis so as to finally obtain the calcium coal carbonization p