Method for preparing white carbon black and manganese fertilizer from manganese leaching residue

Abstract

The invention discloses a method for preparing white carbon black and manganese fertilizer from manganese leaching residue. The method comprises the following steps: 1, washing the manganese leaching residue with dilute sulphuric acid solution and running water in turn to obtain the residue; 2, conducting reaction between the residue and 25 to 40% strong base solution by mass at 90 to 120 DEG C for 2 to 5 h, and filtering to obtain filtrate; 3, decoloring the filtrate with active carbon and then carboxyl-terminated hyperbranched polyester at 100 to 120 DEG C to obtain the aqueous solution of silicate; 4, adding water and then inorganic acid and carboxyl-terminated hyperbranched polyester for reaction at 40 to 90 DEG C for 0.5 to 2 h to obtain the white carbon black; and 5, drying and dehydrating the residue obtained in step 2 and adding into a high-speed mixer, adding phosphoric acid, anticaking agent and manganese sulfate into the high-speed mixer, and mixing at room temperature for 10 to 20 min to obtain the manganese fertilizer. The method is simple in process and low in cost and is suitable for industrial production; and the silicon dioxide content of the prepared white carbonblack is more than 95% by mass, the specific area is more than 270 m<2> / g and the particle size is less than 50 nm.

Description

technical field

[0001] The invention relates to the technical field of recovery and reuse of industrial waste slag, in particular to a method for preparing white carbon black and manganese fertilizer by using manganese leaching slag, and the method is suitable for recycling of industrial manganese leaching slag. Background technique

[0002] Manganese is a raw material for the production of steel and stainless steel. Driven by the continuous growth of steel production, my country's demand for manganese ore continues to rise. As the world's largest producer of manganese-based ferroalloys, China produced 7.45 million tons of manganese-based alloys in 2008. my country is a country rich in manganese ore resources in the world, but the average grade of manganese ore in our country is low, and 93.6% of the manganese ore reserves in the country belong to poor manganese ore. According to statistics, every ton of manganese produced will bring 6-7 tons of manganese slag. Moreover, wi...

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