Method of preparing molten steel refining agent by using industrial solid waste FCC catalyst

A technology of industrial solid waste and catalyst, which is applied in the field of preparing molten steel refining agent by using industrial solid waste FCC catalyst, which can solve pollution and other problems, and achieve the effects of avoiding environmental pollution, good effect and simple production process

Inactive Publication Date: 2020-04-10
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to better solve the problem of processing waste FCC catalysts and the pollution problems caused by them, the present invention provides a method for preparing molten steel refining agents using industrial solid waste FCC catalysts, using industrial solid waste FCC catalysts as raw materials for preparing molten steel refining agents, Fully recycle FCC waste catalyst, turn waste into treasure, greatly increase the added value of products, avoid its damage to the environment and waste of resources, the prepared refining agent has low melting point, fast melting speed, large sulfur capacity, and short smelting time , good desulfurization, deoxidation and de-inclusion effects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The method for preparing premelted refining agent by utilizing industrial solid waste FCC catalyst comprises the following steps:

[0033] (1) Industrial solid waste FCC catalyst and lime powder are made into powder respectively;

[0034] (2) Take the powder according to the mass ratio of industrial solid waste FCC catalyst and lime powder at 40:60, then add magnesia with a total mass of 4%-8% of the aforementioned powder, mix the materials evenly, add them to the electric arc furnace, and Melting and refining at a high temperature of 1600°C, the content of CaO in the obtained mixed material is 54-58wt%, Al 2 o 3 The content is 20-23wt%, SiO 2 The content of is 14-15wt%;

[0035] (3) natural cooling and solidification at room temperature after melting out of the furnace to obtain block material;

[0036] (4) Crushing and forming the block material, and after crushing, a pre-melted refining agent with a particle size of not more than 60 mm can be obtained.

[0037] ...

Embodiment 2

[0039] The method for preparing premelted refining agent by utilizing industrial solid waste FCC catalyst comprises the following steps:

[0040] (1) Industrial solid waste FCC catalyst and lime powder are made into powder respectively;

[0041] (2) Take the powder according to the mass ratio of industrial solid waste FCC catalyst, lime powder and high alumina bauxite at 20:60:20, then add magnesia and 5% magnesia and 5% of the total mass of the powder Stone, mix the materials evenly, put them into the electric arc furnace, melt and refine them at a high temperature of 1600°C, the content of CaO in the obtained mixture is 54-58wt%, Al 2 o 3 The content is 30-32wt%, SiO 2 The content is 7-8wt%;

[0042] (3) natural cooling and solidification at room temperature after melting out of the furnace to obtain block material;

[0043] (4) Crushing and forming the block material, and after crushing, a pre-melted refining agent with a particle size of not more than 60 mm can be obta...

Embodiment 3

[0046] Utilize the method for preparing cold consolidation refining agent by industrial solid waste FCC catalyst, comprising the following steps:

[0047] (1) Industrial solid waste FCC catalyst and lime powder are made into powder respectively;

[0048] (2) according to the mass ratio of industrial solid waste FCC catalyst and lime powder, it is 40:60 to take the powder, then add the magnesia of the aforementioned powder gross mass 4%-8%, carry out mechanical mixing, obtain the mixed powder, and obtain The content of CaO in the mixed material is 54-58wt%, Al 2 o 3 The content is 20-23wt%, SiO 2 The content of is 14-15wt%;

[0049] (3) take by weighing the methyl cellulose of waste FCC catalyst and lime powder gross mass 2% again as binding agent, then mix with described mixing powder;

[0050] (4) The above-mentioned mixed materials are pelletized, and finally dried at 200°C to obtain a cold-consolidated refining agent.

[0051] The refining agent prepared in this exampl...

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Abstract

The invention discloses a method of preparing a molten steel refining agent by using an industrial solid waste FCC catalyst. The molten steel refining agent is prepared by mixing the industrial solidwaste FCC catalyst with lime powder as a primary raw material, handling difficulty of the industrial solid waste FCC catalyst and polluting problem caused by the industrial solid waste FCC catalyst can be solved effectively, recycling of the solid waste is achieved fully, waste is turned into wealth, the production cost is lowered greatly, and the additional value of a product is improved. The prepared refining agent is low in melting point, high in melting speed, large in sulfur capacity, short in smelting time and good in desulfurizing, deoxidizing and inclusion-removing effects. Meanwhile,reduced rare earth oxides in the FCC waste catalyst also can play a role of enhancing properties of steel. The method is simple in preparation process, environmental-friendly and favorable to popularize, and has a relatively large application potential.

Description

technical field [0001] The invention belongs to the technical field of solid waste recycling, and in particular relates to a method for preparing molten steel refining agent by utilizing industrial solid waste FCC catalyst. Background technique [0002] With the continuous progress of society and science and technology, people have higher and higher requirements for steel quality, and the requirements for the content of sulfur, oxygen and inclusions in steel have been reduced. As a result, the traditional steelmaking process cannot meet the increasingly stringent requirements of users for steel quality, so the out-of-furnace refining technology appears and develops rapidly. During the production process of the refining furnace, sulfur, oxygen and inclusions in molten steel are removed by reacting with the added refining agent. Therefore, the refining effect of the refining furnace is closely related to the refining agent used. The high price of raw materials for traditiona...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/06C21C7/064C21C7/00
CPCC21C7/00C21C7/06C21C7/0645
Inventor 倪红卫张华余丽何环宇李杨成日金
Owner WUHAN UNIV OF SCI & TECH
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