Method for preparing foamed ceramic from metallurgical high-temperature flow-state steel slag

A technology of foamed ceramics and steel slag, applied in the field of building materials, can solve the problems of unstable composition, high power consumption of mixing materials, poor stability, etc., and achieve good social and economic benefits, wide application prospects, and stable phase Effect

Inactive Publication Date: 2020-08-11
唐山庄信科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, under the influence of a series of factors such as the continuous advancement of supply-side reforms, the reduction of overcapacity and the resumption of production due to the resolution of excess capacity, the steel market has shown a volatile operation pattern. According to calculations, in 2018, the country produced approximately 269.8689 million tons of blast furnace slag and 139.239 million tons of steel slag. Due to its poor stability, poor grindability, low active substance content, heavy metal content, and unstable composition, steel slag is the most difficult type of solid waste in iron and steel metallurgical slag, and the current comprehensive utilization rate of steel slag is less than 40%.
This traditional method consumes a lot of energy, and consumes 100 to 120 cubic meters of natural gas per cubic foamed ceramic.
[0009] (5) Cutting and grinding: According to the requirements of different sizes of buildings, cutting and grinding of foamed ceramics is carried out to form final foamed ceramic plates, which shows that the prior art has a large power consumption for mixing materials, and a large amount of foamed ceramic powder is consumed. Natural gas, the fabric should be even and flat, foamed ceramics consume a large amount of natural gas, and the shortcomings and shortcomings of foamed ceramics consume a large amount of natural gas

Method used

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  • Method for preparing foamed ceramic from metallurgical high-temperature flow-state steel slag
  • Method for preparing foamed ceramic from metallurgical high-temperature flow-state steel slag
  • Method for preparing foamed ceramic from metallurgical high-temperature flow-state steel slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) Weigh raw materials with the following weight percentages:

[0040]

[0041] (2) Weigh coal gangue, feldspar and quartz according to the above weight percentage, grind coal gangue, feldspar and quartz into powder less than 100 mesh respectively, and mix, and obtain auxiliary raw materials for subsequent use;

[0042] (3) The 1300 degree steel slag in the steelmaking production weighed by the above weight percentage is poured into the smelting ladle in a molten state, and kept warm for use;

[0043] (4) Add the auxiliary raw materials of step (2) into the smelting ladle of step (3), and stir for 10 minutes while feeding, at a stirring speed of 100 rpm to form a silicate ceramic melt;

[0044] (5) Weigh the frit and silicon carbide according to the above weight percentage, so that the particle size of the silicon carbide is 250 meshes, mix the weighed frit and silicon carbide evenly to obtain a mixture, and add the mixture to the glass tank kiln, Heating to 1100°C...

Embodiment 2

[0048] (1) Weigh raw materials with the following weight percentages:

[0049]

[0050] (2) Weigh coal gangue, feldspar and quartz according to the above weight percentage, grind coal gangue, feldspar and quartz into powder less than 100 mesh respectively, and mix, and obtain auxiliary raw materials for subsequent use;

[0051] (3) Pour the 1400°C steel slag in the steelmaking production weighed by the above weight percentage into the smelting ladle in a molten state, and keep it warm for use;

[0052] (4) Add the auxiliary raw materials of step (2) into the smelting ladle of step (3), and stir for 12 minutes while feeding, at a stirring speed of 120 rpm to form a silicate ceramic melt;

[0053] (5) Weigh the frit and silicon carbide according to the above weight percentage, so that the particle size of the silicon carbide is 300 meshes, mix the weighed frit and silicon carbide uniformly to obtain a mixture, and add the mixture to the glass tank kiln, Heating to 1100°C to ...

Embodiment 3

[0057] (1) Weigh raw materials with the following weight percentages:

[0058]

[0059] (2) Weigh coal gangue, feldspar and quartz according to the above weight percentage, grind coal gangue, feldspar and quartz into powder less than 100 mesh respectively, and mix, and obtain auxiliary raw materials for subsequent use;

[0060] (3) Pour the 1200°C steel slag in the steelmaking production weighed by the above weight percentage into the smelting ladle in a molten state, and keep it warm for use;

[0061] (4) Add the auxiliary raw materials of step (2) into the smelting ladle of step (3), and stir for 8 minutes while feeding, at a stirring speed of 80 rpm to form a silicate ceramic melt;

[0062] (5) Weigh the frit and silicon carbide according to the above weight percentage, so that the particle size of the silicon carbide is 600 meshes, mix the weighed frit and silicon carbide evenly to obtain a mixture, and add the mixture to the glass tank kiln, Heating to 1100°C to obtai...

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Abstract

The invention relates to a method for preparing foamed ceramic from metallurgical high-temperature flow-state steel slag, and belongs to the technical field of building materials. According to the method, the waste steel slag serves as a main raw material, physical heat in the metallurgical production process is utilized, the steel slag does not need to be sintered after being subjected to the processes of cooling, crushing, mixing and the like, and thus the remarkable energy-saving and consumption-reducing effects are achieved in the product preparation process. In addition, the steel slag at the temperature of 1100-1400 DEG C in the steelmaking process is directly used in the high-temperature molten state without supercooling, and the steel slag does not need to be treated by a water splashing method or a hot stuffy method so that evaporation of hot fugitive white water vapor is completely eliminated, the environment is improved, and the environment-friendly'white removal 'requirement is met. The foamed ceramic prepared by the method is stable in phase and uniform in pores, foamed ceramic parts with different complex shapes can be manufactured according to different requirementsof product usability, and the foamed ceramic has good social benefits and economic benefits and wide application prospects.

Description

technical field [0001] The invention relates to a method for preparing foamed ceramics by using metallurgical high-temperature fluid steel slag, which belongs to the technical field of building materials. Background technique [0002] Foamed ceramics is a kind of ceramic material with closed pores function through high-temperature firing and high-temperature foaming. Sintering aids, foaming agents and foam stabilizers are often used in the production process to form the required closed-pore structure. Because of the special material and structure of the foamed ceramic material, the foamed ceramic material not only has good chemical properties, can be used in various corrosive environments, has good mechanical properties and stiffness and other excellent properties of traditional ceramics, but also has low specific gravity and low thermal conductivity. Good performance such as high efficiency, sound absorption and heat insulation. Therefore, foamed ceramic materials are wide...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/00C04B33/132C04B33/138C04B35/16C04B35/622
CPCC04B33/132C04B33/138C04B35/16C04B35/62204C04B38/00C04B38/0087C04B2235/3418C04B2235/3463C04B2235/3826Y02P40/60
Inventor 吴冀
Owner 唐山庄信科技有限公司
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