A kind of red mud curing agent and its application

Abstract

The invention discloses a red mud curing agent and a use thereof and belongs to the technical field of red mud comprehensive utilization. The red mud curing agent comprises 20-90 parts of slag powder, 1-50 parts of fly ash, 1-30 parts of silt, 5-15 parts of a catalysis exciting agent containing sodium, potassium, calcium and magnesium and 0.1-10 parts of whisker fibers. Fly ash and silt can well adjust a silicon-aluminum ratio of red mud and liquid-plastic limit index and improve engineering body strength performance indexes and engineering usability. Whisker fibers improve a flexural capability and crack resistance of the finished product. The red mud curing agent is powdery solid, is convenient for engineering use, and can be used by addition and stirring based on a ratio according to different engineering performance requirements. Through reasonable blending, the red mud curing agent can improve strength of a cured body containing red mud as a main component, completely satisfy building non-burnt brick, road base and surface layer engineering index requirements and realize large consumption of red mud.

Description

technical field [0001] The invention relates to the technical field of comprehensive utilization of red mud, in particular to a red mud solidifying agent and its application. Background technique [0002] Red mud is the alkali-containing solid waste produced in the process of producing alumina from bauxite. For every ton of alumina produced, about 0.8 to 1.8 tons of red mud are produced. my country is a major producer of alumina. In 2013, about 4375 tons of alumina were produced. 10,000 tons, accounting for 45.9% of the world's total output, and nearly 50 million tons of red mud produced. At present, the comprehensive utilization rate of red mud in my country is only about 4%, resulting in a large stockpiling of red mud. The statistical stockpiling in 2009 is about 200 million tons. Stockpiling not only occupies land resources, but also easily causes environmental pollution and potential safety hazards. [0003] At present, the comprehensive utilization of alumina red mud is...

AI Technical Summary

Problems solved by technology

[0004] Patent 201310252096 describes a method of making unburned bricks using water glass, active initiator, microsilica fume and red mud, but it requires steaming in an autoclave, which consumes high-grade energy

Patent CN200910162876 describes a method of road base and water stabilization layer: the main raw materials are low-temperature ceramic curing agent, red mud and aggregate, and the amount of red mud added is only 2-10%, and the utilization of red mud is relatively low