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Nano silica sol combination hearth self-flowing material and preparation method thereof

A nano-silica sol, self-flowing material technology, applied in the field of refractory materials, can solve the problems of poor integrity, poor corrosion resistance, thermal conductivity mismatch, etc. Effect

Active Publication Date: 2016-07-06
CHINA JINGYE ENG +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In order to solve the above-mentioned problems, an object of the present invention is to provide a kind of nano-silica sol combined hearth self-flowing material used for new construction / maintenance of blast furnace hearth, which solves the poor integrity of traditional blast furnace hearth refractories , serious local damage, mismatched heat conduction, and poor corrosion resistance. At the same time, the construction method of the material was changed, which greatly reduced the construction period and manpower consumption of the blast furnace hearth construction / repair process, and the formwork pumping and pouring construction improved the environment. Improving the safety performance and service life of blast furnace hearth

Method used

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  • Nano silica sol combination hearth self-flowing material and preparation method thereof
  • Nano silica sol combination hearth self-flowing material and preparation method thereof
  • Nano silica sol combination hearth self-flowing material and preparation method thereof

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Effect test

Embodiment 1

[0053] The preparation process of the described nano-silica sol combined with hearth self-flowing material is as follows:

[0054]In the high-efficiency forced mixing equipment, set the stirring time to 5-8 minutes, the rotor speed to 500 rpm, and the turntable speed to 180 rpm. At room temperature, add 80.0 parts of brown corundum, 10.0 parts of silicon carbide, 5.0 parts of activated alumina micropowder, 3.0 parts of silica micropowder, 2.0 parts of spherical pitch, 0.05 part of inorganic fiber, 0.02 parts of sol curing agent, 0.05 parts of dispersant, uniformly mixed, then added 7.0 parts of nano-silica sol, after uniform mixing to obtain the nano-silica sol combined hearth self-flowing material of the present invention.

Embodiment 2

[0056] The preparation process of the described nano-silica sol combined with hearth self-flowing material is as follows:

[0057] In the high-efficiency forced mixing equipment, set the stirring time to 5-8 minutes, the rotor speed to 500 rpm, and the turntable speed to 180 rpm. At room temperature, add 75.0 parts of brown corundum, 15.0 parts of silicon carbide, 5.0 parts of activated alumina micropowder, 3.0 parts of silica micropowder, 2.0 parts of spherical pitch, 0.05 part of inorganic fiber, 0.02 parts of sol curing agent, 0.05 parts of dispersant, uniformly mixed, then added 7.4 parts of nano-silica sol, after uniform mixing to obtain the nano-silica sol combined hearth self-flowing material of the present invention.

Embodiment 3

[0059] The preparation process of the described nano-silica sol combined with hearth self-flowing material is as follows:

[0060] In the high-efficiency forced mixing equipment, set the stirring time to 5-8 minutes, the rotor speed to 500 rpm, and the turntable speed to 180 rpm. At room temperature, add 72.0 parts of brown corundum, 15.0 parts of silicon carbide, 8.0 parts of activated alumina micropowder, 3.0 parts of silica micropowder, 2.0 parts of spherical pitch, 0.05 part of inorganic fiber, 0.02 parts of sol curing agent, 0.05 parts of dispersant, uniformly mixed, then added 7.5 parts of nano-silica sol, after uniform mixing to obtain the nano-silica sol combined hearth self-flowing material of the present invention.

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Abstract

The invention belongs to the technical field of fireproof materials, and relates to a nano silica sol combination hearth self-flowing material and a preparation method thereof. The nano silica sol combination hearth self-flowing material comprises the following components in parts by weight: 65 to 80 parts of corundum, 8 to 20 parts of silicon carbide, 5 to 10 parts of active alumina micropowder, 2 to 5 parts of silica micropowder, 1 to 5 parts of spherical asphalt, 0.03 to 0.08 part of inorganic fiber, 0.01 to 0.1 part of sol curing agent, 0.05 to 0.15 part of dispersant, and 7 to 10 parts of nano silica sol. The provided nano silica soil combination hearth self-flowing material is an advanced self-flowing material for building or maintenance of blast furnace. The self-flowing material is casted and moulded through a framework and pump-delivering so as to build or repair a hearth. Compared with the conventional brick building method, the self-flowing material method has the characteristics of strong integral property, convenience for construction, little construction time, quick production, long service life, and little environmental pollution. Compared with the conventional ceramic cups, SiC and nano silica sol are combined to enhance the matrix, and the performance on resisting molten iron erosion is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a nano-silica sol combined hearth self-flowing material and a preparation method thereof. Background technique [0002] Blast furnace is the main equipment for continuous high-temperature operation of ironmaking. Its hearth is the key part of safety and longevity in the production process of blast furnace. Its superior performance determines the service life of blast furnace. The hearth has been subjected to physical swirling and eddy current erosion and chemical erosion of molten iron for a long time, resulting in melting and damage of the hearth; at the same time, there are a large number of brick joints in the hearth masonry process, resulting in local defects and uneven damage, and even furnace cracks appear due to brick joint erosion. The furnace bottom or side wall bricks of the hearth float, the safety of the hearth is threatened, and the goal of l...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/103
CPCC04B35/103C04B35/66C04B2235/3217C04B2235/3418C04B2235/3826C04B2235/5232
Inventor 唐勋海李洪会范咏莲郑期波张雯文郑江
Owner CHINA JINGYE ENG
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