A plugging and pressing material for air leakage of the bottom foundation of the hot blast stove

A technology of pressing material and hot blast stove, applied in the field of refractory materials, can solve the problems of large amount of liquid added, not meeting the requirements for use, and easy to crack.

Active Publication Date: 2021-06-08
中冶武汉冶金建筑研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing press-in materials at home and abroad mainly include water glass bonded, phenolic resin bonded, etc. The above-mentioned pressed-in materials have their own shortcomings when used in this part, and they cannot meet the requirements for use.
For example, the water glass bonded press-in material has a large water content, and it shrinks greatly after curing, which is easy to crack; the phenolic resin bonded press-in material needs to be diluted in advance, the amount of liquid added is large, and the curing at room temperature is slow, and the diluent volatilizes after curing at room temperature, resulting in shrinkage. Disadvantages such as big and brittle

Method used

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  • A plugging and pressing material for air leakage of the bottom foundation of the hot blast stove
  • A plugging and pressing material for air leakage of the bottom foundation of the hot blast stove
  • A plugging and pressing material for air leakage of the bottom foundation of the hot blast stove

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A plugging press-feed material used for air leakage at the bottom of a hot blast stove. The components and their mass percentages are: 48% of super-grade high-bauxite particles, 25% of super-grade high-bauxite powder, and active silica 2% of micropowder, 3% of active α-alumina micropowder, 0.2% of dispersant, 20% of furan resin, 1.8% of curing agent; its preparation method comprises the following steps: weighing super-grade high-alumina bauxite granules, super-grade high-alumina Bauxite powder, active silica micropowder, active aluminum oxide, and dispersant are weighed according to the proportion and added to a forced mixer to mix evenly. The resulting mixture is packed and transported in tons of bags; When used on site, put the mixture into a forced mixer, add furan resin and curing agent according to the proportion and stir for 5-8 minutes, and directly use the cement mortar pump to press into the leaking part to be sealed.

Embodiment 2

[0035] A plugging press-feed material used for air leakage at the bottom of a hot blast furnace, the components and their mass percentages are: 42% of super-grade high-bauxite particles, 25% of super-grade high-bauxite powder, active silica 2% micropowder, 3% active α-alumina micropowder, 0.2% dispersant, 25% furan resin, and 2.8% curing agent; Bauxite powder, active silica micropowder, active aluminum oxide, and dispersant are weighed according to the proportion and added to a forced mixer to mix evenly. The resulting mixture is packed and transported in tons of bags; When used on site, put the mixture into a forced mixer, add furan resin and curing agent according to the proportion and stir for 5-8 minutes, and directly use the cement mortar pump to press into the leaking part to be sealed.

[0036] The performance test results of the plugging material obtained in Example 1 of the present invention are shown in Table 1, and the performance test results of Example 2 are equiv...

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Abstract

The invention discloses a plugging press-feed material for air leakage of the bottom foundation of a hot blast stove. The components and their mass percentages include: 40-50% of special-grade high-bauxite granular material; special-grade high-bauxite powder 25-35%; active α-alumina fine powder 2-4%; active silica fine powder 2-4%; dispersant 0.05-0.5%; furan resin 19-25%; curing agent 1-3%. The press-in material has the characteristics of easy mechanized construction, good fluidity, short construction time, strong bonding performance, curable at room temperature, high strength after curing, and good volume stability; it can effectively improve the shrinkage cracking existing in the existing online repair method , high brittleness and other problems, it has important industrialization promotion value.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a plugging press-feed material used for air leakage of the bottom foundation of a hot blast stove. Background technique [0002] After the hot blast stove attached to the blast furnace is put into use or used for a period of time, air leakage from the foundation of the hot blast stove often occurs, which not only causes the loss of power and heat energy, but also the leaked gas contains certain toxic components, which not only pollutes the environment but also damages the equipment. Maintenance personnel pose a safety hazard. In addition, the hot blast stove needs to be continuously produced after it is put into use, so it is difficult to rebuild the foundation of the hot blast stove, and the reconstruction cost is huge, so it needs to be repaired online. [0003] At present, the effective online repair method is to use the press-in material with the cha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/101
CPCC04B35/101C04B2235/3418C04B2235/447C04B2235/77C04B2235/96C04B2235/9615
Inventor 丛培源刘会永项冰
Owner 中冶武汉冶金建筑研究院有限公司
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