Method for efficiently and synergistically recycling chromium-containing waste slag and carbon-containing waste materials

Abstract

The invention discloses a method for efficiently and synergistically recycling chromium-containing waste slag and carbon-containing waste materials. The method comprises the following steps that raw materials including the chromium-containing waste slag and the carbon-containing waste materials are uniformly mixed and pelletized to obtain spherical materials; meanwhile, raw materials including an iron-containing raw material, a flux and fuel are uniformly mixed and granulated to obtain granules; and the spherical materials and the granules are mixed and then distributed in a layered manner to a sintering machine for air draft sintering to obtain the chromium-containing sintered ore. According to the method, the chromium-containing waste slag and the carbon-containing waste materials are efficiently and synergistically utilized in a resource mode in the iron-containing raw material sintering process, not only can thorough detoxification of the chromium-containing waste slag be achieved in one step, but also the chromium-containing waste slag and the carbon-containing waste materials can be utilized in the resource mode, high-quality furnace burden is provided for blast furnace smelting of chromium-containing molten iron, and obvious economic and environmental benefits are achieved.

Description

technical field

[0001] The invention relates to a method for resource utilization of chromium-containing waste slag and carbon-containing waste, in particular to a method for utilizing sintering method in the process of iron ore sintering to realize the complete detoxification of chromium-containing waste slag and carbon-containing waste in one step As well as a method for obtaining high-quality chromium-containing composite sintered ore, it belongs to the technical field of metallurgy and environmental protection. Background technique

[0002] my country is the world's largest consumer of chromium resources, and its chromium consumption exceeds one-third of the world's chromite ore output, but my country's annual chromite ore output is less than 1% of the world's annual output. The huge demand makes chromium become a One of the metals with the highest dependence on foreign countries in my country, the contradiction between supply and demand is very prominent.

[0003] On th...