Method for preparing rubber masterbatch by calcium carbonate dispersed by lignin

Provided is a method for preparing rubber masterbatch by calcium carbonate dispersed by lignin. The method comprises two working sections of lignin dispersed calcium carbonate filler preparing by the lignin dispersed calcium carbonate and blending of filter and rubber. In the first working section, water, the lignin and the calcium carbonate are mixed according to a certain proportion, then ball milling is performed on a ball mill to obtain paste of the lignin dispersed calcium carbonate, dehydration is performed on the obtained paste in a air drying oven of 60-70 DEG C or in a vacuum drying oven to enable the water content of the paste to be 10-30 percent, and then the lignin dispersed calcium carbonate filter is obtained. In the second working section, the calcium carbonate filter dispersed by the lignin in the first working section and rubber are blended through an open mill or an internal mixer, and then are prilled through a double-screw extruder to prepare rubber masterbatch materials. Application research shows that the rubber masterbatch materials can be used as a reinforcing agent to greatly improve the mechanical properties of rubber materials. The method has the advantages that the preparation technology is simple, raw materials are low in price and easy to obtain, and meanwhile the lignin belongs to a product of comprehensive utilization of resources.