Dechlorination method of titanium tailings and its products, slag fine powder and its application and its products

Abstract

The invention provides a dechlorination method for extracting titanium tailings and its products, slag micropowder and its application and its products, and relates to the technical field of metallurgy and environmental protection. A dechlorination method for titanium extraction tailings. In the method, in a closed container, the mixture of titanium extraction tailings and water is raised to 100-250° C., kept for 20-150 minutes, and then cooled to obtain a titanium extraction tailings turbid liquid. The dechlorination method of titanium extraction tailings alleviates the technical problem of lack of a dechlorination method for titanium extraction tailings in the prior art, which has a good dechlorination effect and has little influence on the activity of titanium extraction tailings. The invention also provides the method The dechlorination and extraction of titanium tailings prepared by the dechlorination method of titanium tailings; in addition, the invention also provides a kind of slag fine powder, its application and its products.

Description

technical field [0001] The invention relates to the technical field of metallurgy and environmental protection, in particular to a dechlorination method for extracting titanium tailings and its products, slag micropowder and its application and its products. Background technique [0002] The accumulation of solid waste generated by the discharge of titanium-containing blast furnace slag in the metallurgical industry has seriously damaged the environment and caused a waste of resources. Taking Panzhihua Iron and Steel as an example, Panzhihua Iron and Steel emits about 3 million tons of titanium-containing blast furnace slag every year, and the titanium dioxide content in titanium-containing blast furnace slag is about 20-26%. Titanium-containing blast furnace slag is generally inactive after water quenching and cannot be directly used as slag powder Use, direct stockpiling will cause great waste. For this reason, Panzhihua Iron and Steel has developed a "high-temperature ca...

AI Technical Summary

Problems solved by technology

At present, dechlorination is carried out through a countercurrent-water washing process, but the chlorine content after dechlorination is about 0.2%, and the dechlorination effect is not good; in addition, some dechlorination processes will reduce the hydration activity of the titanium tailings. The defect seriously affects the large-scale application of the product obtained after dechlorination

[0003] With the development of the economy and the acceleration of urban construction, the demand for concrete is increasing. In order to ensure the workability, hydration activity, early strength, later safety and less heat of hydration of concrete, concrete in the construction field The parameter standards of concrete are usually relatively strict. For example, in the field of building materials, the reference cement standard requires the chlorine content standard to be 0.06% or less. The strictness of the parameter standards results in high cost of concrete preparation.

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