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Additive and method for promoting increasing of perovskite phase in high-titanium blast furnace slag

A technology of perovskite phase and blast furnace slag, which is applied in the field of metallurgy, can solve the problems of lack of raw materials for cement, and achieve the effects of reduced production costs, low cost, and increased particle size

Inactive Publication Date: 2018-09-07
SICHUAN CHUANWEI GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After a large amount of vanadium-titanium ore is used, the blast furnace slag will not be able to be used as a large amount of cement raw materials. As a result, there will be a shortage of raw materials for cement, and the high-titanium blast furnace slag must be piled up again in the slag yard.

Method used

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  • Additive and method for promoting increasing of perovskite phase in high-titanium blast furnace slag
  • Additive and method for promoting increasing of perovskite phase in high-titanium blast furnace slag
  • Additive and method for promoting increasing of perovskite phase in high-titanium blast furnace slag

Examples

Experimental program
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Effect test

Embodiment 1

[0039] This embodiment provides an additive for promoting the growth of the perovskite phase in high-titanium blast furnace slag, which consists of a calcium-containing precipitation agent that promotes the precipitation of perovskite and a carbonate accelerator that promotes the coarsening of perovskite according to the mass ratio Made for a 1:1 ratio. The calcium-containing precipitation agent is calcium oxide, and the carbonate promoter is sodium carbonate.

[0040] This embodiment also provides a method for promoting the increase of the perovskite phase in high-titanium blast furnace slag, comprising the following steps:

[0041] Additives are mixed with high-titanium blast furnace slag, and then the gas carrier is introduced when the temperature is raised to 1430°C. The additive accounts for 2% of the mass of the high-titanium blast furnace slag, the gas carrier is air, and reacts for 6 minutes after passing through the gas carrier.

[0042] Cooling is carried out after...

Embodiment 2-5

[0044] Examples 2-5 are basically the same as those in Example 1, except that the proportions are different. Examples 2-5 are basically the same as the method provided in Example 1 for promoting the growth of the perovskite phase in high-titanium blast furnace slag, except that the operating conditions are changed.

Embodiment 2

[0045] Example 2: Additives: The mass ratio of the calcium-containing precipitation agent to the carbonate accelerator is 3:1, and the carbonate accelerator is potassium carbonate.

[0046] Method: The medium additive accounts for 4% of the mass of the high-titanium blast furnace slag, the gas carrier is oxygen, the slag temperature is 1380°C when the gas carrier is introduced, and the reaction is carried out for 10 minutes after the gas carrier is introduced. Cooling was performed by reducing the reaction temperature to 800°C at a rate of 2°C / min, and then lowering the temperature to 20°C at a rate of 3°C / min.

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Abstract

The invention relates to the technical field of metallurgy, in particular to an additive and method for promoting the increasing of a perovskite phase in high-titanium blast furnace slag. The additivefor promoting the increasing of the perovskite phase in the high-titanium blast furnace slag is prepared from a calcium-containing precipitant for promoting precipitation of perovskite and a carbonate promoter for promoting coarsening of the perovskite according to a mass ratio of 1-3 to 1. The additive is low in cost, can effectively increase the particle size of the perovskite and effectively promote enrichment of a titanium component in the high-titanium blast furnace slag into the perovskite phase, and facilitates the precipitation of the perovskite.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to an additive and a method for promoting the growth of perovskite phase in high-titanium blast furnace slag. Background technique [0002] The Panxi area is rich in vanadium-titanium magnetite resources, and the proven industrial reserves of titanium dioxide have reached 380 million tons, accounting for more than 90% of China's titanium resources. After beneficiation, about 50% of the titanium enters the iron concentrate. In the blast furnace smelting, the blast furnace slag basically enters, and TiO in the slag 2 The content is as high as more than 20%. At present, at least 3 million tons of blast furnace slag are discharged in the Panxi area every year, and the accumulated amount has exceeded 60 million tons so far. Before a large amount of vanadium-titanium ore was used, blast furnace slag was mainly used as a raw material for cement in cement plants, which is a typical cir...

Claims

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Application Information

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IPC IPC(8): C22B7/04C22B34/12C21B3/06
CPCC21B3/06C22B7/001C22B7/04C22B34/1227Y02P10/20Y02W30/50
Inventor 蒲年文荆七一李中江冯少强
Owner SICHUAN CHUANWEI GRP CO LTD
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