Disclosure of Invention
The invention aims to provide an elastic fiber sealing material for sealing a coke oven and a preparation method thereof, which are used for solving the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions:
an elastic fiber sealing material for sealing a coke oven and a preparation method thereof comprise the following components in percentage by mass:
10-12% of broken fiber cotton, 3-5% of low-fiber sepiolite fiber, 3-5% of high-fiber sepiolite fiber, 28-32% of aluminum-silicon refractory powder, 4-6% of Guangxi white mud, 3-5% of specific gravity 1.28 aluminum sulfate solution and 40-48% of water.
Preferably, the broken fiber cotton is broken by a breaking machine, and the main content of the broken fiber cotton extracted by 30mm meshes is Al2O3+SiO2 -80%.
Preferably, the fiber content of the low-fiber sepiolite fiber is less than or equal to 40 percent, and the fiber content of the high-fiber sepiolite fiber is more than or equal to 80 percent.
Preferably, the aluminum-silicon refractory powder contains more than or equal to 85% of Al2O3+SiO2 and has granularity of 180-320 meshes.
Preferably, the granularity of the Guangxi white mud is 120-200 meshes, and Al2O3+SiO2 is more than or equal to 80 percent.
Preferably, the specific gravity 1.28 aluminum sulfate solution is formed by mixing and dissolving 50% of aluminum sulfate particles and 50% of water, and the specific gravity is 1.28.
A method for preparing an elastic fiber sealing material for coke oven sealing, comprising the elastic fiber sealing material for coke oven sealing, which is characterized by comprising the following steps:
S1, adding broken fiber cotton into a stirrer, adding water, stirring until no dry fiber mass exists, then adding high-fiber type sepiolite fiber, continuously stirring until no dry fiber mass exists, then adding low-fiber type sepiolite fiber, continuously stirring until the fiber is completely dispersed, wherein the low-fiber type sepiolite fiber contains a certain amount of powder, and absorbing excessive water, and the stirred fiber is pasty;
s2, adding aluminum silicate refractory powder into a stirrer, stirring for 3-5 minutes until the aluminum silicate refractory powder is uniformly stirred, and filling the powder into fiber gaps to enable the coating to have a certain sealing effect;
s3, adding the Guangxi white mud into a stirrer to enable the paint to have certain viscosity, so that the paint is convenient to paint and has certain strength after being dried;
S4, adding an aluminum sulfate solution with the specific gravity of 1.28, wherein a small amount of the aluminum sulfate solution can enable the coating to have certain strength after being dried, and the lower strength also enables the coating to keep certain elasticity.
Compared with the prior art, the invention has the beneficial effects that:
(1) In the elastic fiber sealing material for sealing the slag pot, the broken fiber cotton is broken by a fiber breaking machine from leftovers of aluminum silicate fiber blankets, the content of the broken fiber cotton is Al2O3+SiO2 -80%, the broken fiber cotton is easier to disperse in the sealing material, the original blanket structure is just broken up during breaking, the fiber is better kept, and the sealing material is added, so that the density of the sealing material can be effectively reduced, the structural integrity is kept, and the sealing material is not easy to crack.
(2) The high-fiber sepiolite fiber further increases the content of long fibers in the sealing material, is beneficial to the integrity of the sealing material, has the fiber content of more than 80 percent, and the powder contained in the low-fiber sepiolite fiber can effectively lock the moisture in the sealing material, so that the bleeding phenomenon of the sealing material in the storage process is prevented, and the fiber content of the low-fiber sepiolite fiber is less than 40 percent. The aluminum-silicon refractory powder has the main content of Al2O3+SiO2 -85%, and the granularity of 180-320 meshes, and can fill gaps among fibers, so that the sealing performance of the sealing material is improved. The addition of the Guangxi white mud can ensure that the sealing material has certain viscosity, better adhesiveness during coating or spraying, and improved tightness to the material to a certain extent. The aluminum sulfate solution with the specific gravity of 1.28 is obtained by dissolving aluminum sulfate particles and water in a ratio of 1:1, and a small amount of aluminum sulfate solution is added to enable the sealing material to have proper strength after being dried.
(3) Compared with the existing sealing treatment mode, the elastic fiber sealing material is easy to construct and smear, the gap is easy to fill and compact in size, the integrity is good, the gap is not cracked, the elastic fiber sealing material can be smeared and sprayed, the large-area construction is convenient, the service life is long, the labor intensity is reduced, the production cost of enterprises is low, and the economic benefit is obvious.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Embodiment one:
Referring to FIG. 1, the elastic fiber sealing material for coke oven sealing comprises, by mass, 10-12% of disintegrated fiber cotton, 3-5% of low-fiber sepiolite fiber, 3-5% of high-fiber sepiolite fiber, 28-32% of aluminum-silicon refractory powder, 4-6% of Guangxi white mud, 3-5% of aluminum sulfate solution with a specific gravity of 1.28 and 40-48% of water.
A preparation method of an elastic fiber sealing material for coke oven sealing comprises the following steps:
Adding broken fiber cotton into a stirrer, adding water, stirring until no dry fiber mass exists, adding high-fiber sepiolite fiber, continuously stirring until no dry fiber mass exists, adding low-fiber sepiolite fiber, continuously stirring until the fiber is completely dispersed, wherein the low-fiber sepiolite fiber contains a certain amount of powder, and can absorb excessive water, and the stirred fiber is pasty;
adding the three-level alumina powder into a stirrer, stirring for 3-5 minutes until the alumina powder is uniformly stirred, and filling the powder into fiber gaps to enable the coating to have a certain sealing effect;
adding the Guangxi white mud into a stirrer to enable the paint to have certain viscosity, be convenient to paint, and have certain strength after drying;
Finally, adding the aluminum sulfate solution with the specific gravity of 1.28, wherein a small amount of the aluminum sulfate solution can ensure that the coating has certain strength after being dried, and the lower strength can ensure that the coating maintains certain elasticity.
The elastic fiber sealing material for coke oven sealing, which is obtained according to the preparation method, has the compressive strength of not more than 0.5Mpa after being dried at 105 ℃, not more than 0.5Mpa after being burned at 500 ℃, the linear change rate of not more than 0.5% after being burned at 500 ℃, the thermal state compression rate of not less than 15% at 500 ℃, the heat conductivity coefficient of not more than 0.2W/mK and the spray rebound rate of not more than 5%.
The weight percentages of the raw materials of the elastic fiber sealing material for sealing the coke oven are shown in the following table 1:
TABLE 1
Physical and chemical index detection of the elastic fiber sealing material for coke oven sealing obtained in this example is shown in the following table 2:
TABLE 2
From the above, the elastic fiber sealing material for coke oven sealing obtained in the embodiment has the advantages of meeting the requirements on all performances, along with less construction spraying rebound, good elasticity, small shrinkage, no cracking, good heat preservation effect, convenient construction, no cracking, elasticity, no smoke leakage and meeting the requirements.
Embodiment two:
the weight percentages of the raw materials of the elastic fiber sealing material for sealing the coke oven are shown in the following table 3:
TABLE 3 Table 3
Physical and chemical index detection of the elastic fiber sealer for coke oven sealing obtained in this example is shown in Table 4
TABLE 4 Table 4
From the above, the elastic fiber sealing material for coke oven sealing obtained in the embodiment has the advantages of meeting the requirements on all performances, along with less construction spraying rebound, good elasticity, small shrinkage, no cracking, good heat preservation effect, convenient construction, no cracking, elasticity, no smoke leakage and meeting the requirements.
Example 3
The weight percentages of the raw materials of the elastic fiber sealing material for sealing the coke oven are shown in the following table 5:
TABLE 5
Physical and chemical index detection of the elastic fiber sealer for coke oven sealing obtained in this example is shown in Table 6
TABLE 6
From the above, the elastic fiber sealing material for coke oven sealing obtained in the embodiment has the advantages of meeting the requirements on all performances, along with less construction spraying rebound, good elasticity, small shrinkage, no cracking, good heat preservation effect, convenient construction, no cracking, elasticity, no smoke leakage and meeting the requirements.
Example 4
The weight percentages of the raw materials of the elastic fiber sealing material for sealing the coke oven are shown in the following table 7:
TABLE 5
Physical and chemical index detection of the elastic fiber sealer for coke oven sealing obtained in this example is shown in Table 8
TABLE 6
From the above data, it can be obtained that the strength of the sealing material obtained by the embodiment is too high, so that the thermal state compression rate is low, the elasticity is small, the sealing material is easy to crack, and although other performances can be met, the elastic requirement of the sealing material cannot be met;
In the elastic fiber sealing material for sealing the slag pot, the broken fiber cotton is broken by a fiber breaking machine from leftovers of aluminum silicate fiber blankets, the content of the broken fiber cotton is Al2O3+SiO2 -80%, the broken fiber cotton is easier to disperse in the sealing material, the original blanket structure is just broken up during breaking, the fiber is better kept, and the sealing material is added, so that the density of the sealing material can be effectively reduced, the structural integrity is kept, and the sealing material is not easy to crack.
The high-fiber sepiolite fiber further increases the content of long fibers in the sealing material, is favorable for the integrity of the sealing material, has the fiber content of more than 80 percent, and the low-fiber sepiolite fiber contains powder which can effectively lock the moisture in the sealing material, so as to prevent the bleeding phenomenon of the sealing material in the storage process, and has the fiber content of less than 40 percent. The aluminum-silicon refractory powder has the main content of Al2O3+SiO2 -85%, and the granularity of 180-320 meshes, and can fill gaps among fibers, so that the sealing performance of the sealing material is improved. The addition of the Guangxi white mud can ensure that the sealing material has certain viscosity, better adhesiveness during coating or spraying, and improved tightness to the material to a certain extent. The aluminum sulfate solution with the specific gravity of 1.28 is obtained by dissolving aluminum sulfate particles and water in a ratio of 1:1, and a small amount of aluminum sulfate solution is added to enable the sealing material to have proper strength after being dried, so that the strength is too high to lose elasticity when the addition amount is too large, and the strength of the whole material is too low to be easily pulverized when the addition amount is too small;
the broken fiber cotton in the invention has low recycling cost, rich and easily available main material resources, simple and easily operated production process, environmental protection and no pollution.
Compared with the existing sealing treatment mode, the elastic fiber sealing material is easy to construct and smear, gaps are easy to fill and compact in size, good in integrity, free of cracking, capable of being smeared and sprayed, convenient for large-area construction, long in service life, low in labor intensity, low in enterprise production cost and obvious in economic benefit.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.