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Dechlorination method for titanium-extraction tailings, product of dechlorination method, and ore slag micro-powder and application and product thereof

A technology for extracting titanium tailings and slag micropowder, applied in cement production and other directions, can solve the problems of poor dechlorination effect, less heat of hydration, and high cost of concrete preparation, and achieve good hydration activity, improved dechlorination effect, and dechlorination. Chlorine works well

Active Publication Date: 2019-01-25
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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  • Dechlorination method for titanium-extraction tailings, product of dechlorination method, and ore slag micro-powder and application and product thereof

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Effect test

preparation example Construction

[0074] The slag micropowder can be used in the preparation of building materials, and can be used as a raw material to reduce the cost of building materials. Building materials include cement or concrete. The slag micropowder of the present invention can be used to prepare cement or concrete, thereby reducing the cost of cement and concrete.

[0075] In the fifth aspect, a construction material comprising the above-mentioned dechlorination and titanium extraction tailings or the above-mentioned slag fine powder;

[0076] The building material containing the above-mentioned dechlorination and titanium removal tailings or the above-mentioned slag fine powder also has the advantages of low cost, low chlorine content, and good hydration activity. In addition, the cost of this building material is relatively low.

[0077] Preferably, the building material comprises cement or concrete.

[0078] The cement or concrete containing the above-mentioned dechlorination and extraction of ti...

Embodiment 1

[0081] Pour the mixture of titanium extraction tailings and water with a mass ratio of 1:3 into the autoclave, the mixture of titanium extraction tailings and water accounts for 65% of the total volume of the autoclave, adjust The stirring speed is 600r / min, and the temperature is raised. After the autoclave is heated to a temperature of 100°C, the temperature is kept for 30 minutes, and then the temperature is lowered to a temperature of 25°C to obtain a turbid titanium extraction tailings liquid, and then the titanium extraction tailings turbid liquid Transfer to a plate and frame filter press for pressure filtration, and the wet dechlorination and titanium extraction tailings obtained after the pressure filtration are heated to 100°C in an oven for drying for 60 minutes to obtain the dechlorination and titanium extraction tailings.

Embodiment 2

[0083] The difference between embodiment 2 and embodiment 1 is only that, insulation 60min.

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Abstract

The invention provides a dechlorination method for titanium-extraction tailings, a product of the dechlorination method, and ore slag micro-powder and application and a product thereof, and relates tothe technical field of metallurgical environmental protection. The dechlorination method for the titanium tailings comprises the following steps: in a closed container, heating a mixture of the titanium-extraction tailings and water to 100 to 250 DEG C, preserving heat for 20 to 150 minutes, and then cooling to obtain titanium-extraction tailings turbid liquid. The dechlorination method for the titanium-extraction tailings alleviates the technical problem that a titanium-extraction tailings dechlorination method with a good dechlorination effect and small influence on activity of the titanium-extraction tailings is lacked in the prior art. The invention also provides dechlorinated titanium-extraction tailings prepared by the dechlorination method for the titanium-extraction tailings, andin addition, the invention also provides the ore slag micro-powder and the application and the product thereof.

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...

Claims

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Application Information

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IPC IPC(8): C04B7/147C04B7/38C04B5/00
CPCC04B5/00C04B7/147C04B7/38Y02P40/10
Inventor 邵国庆
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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