阅读说明：本技术 一种高耐磨铬钢玉捣打料及其应用 (High-wear-resistance chrome corundum ramming material and application thereof ) 是由 周剑波 于 2019-01-18 设计创作，主要内容包括：本发明公开了一种高耐磨铬钢玉捣打料及其应用,高耐磨铬钢玉捣打料包括以下重量份数的各组分：铬刚玉56～65份、锆刚玉0～15份、结合剂6～12份、增强剂1～4份、促凝剂3～6份、防爆纤维0.3～0.5份、氮化硅3～5份、氮化硼2～4份、绶聚剂0.1～0.3份；其应用具体如下：将铬刚玉捣料粉料全部投入搅拌器,搅拌1分钟后,加入五分之四结合剂,搅拌3～4分钟,加入促凝剂,搅拌2～3分钟,加入剩余结合剂,直至搅拌均匀,然后捣打在输气导管的水冷壁上,自然固化8～12小时后,磷酸铝铬胶体浓缩、脱水、固化；在气化烘炉过程时,利用水冷壁的温度升温至230℃,烘炉56小时。本发明耐磨性能优异,化学稳定性好,烧后线变率小,施工方便,使用寿命长。(The invention discloses a high-wear-resistance chrome corundum ramming mass and application thereof, wherein the high-wear-resistance chrome corundum ramming mass comprises the following components in parts by weight: 56-65 parts of chrome corundum, 0-15 parts of zirconium corundum, 6-12 parts of binding agent, 1-4 parts of reinforcing agent, 3-6 parts of coagulant, 0.3-0.5 part of explosion-proof fiber, 3-5 parts of silicon nitride, 2-4 parts of boron nitride and 0.1-0.3 part of polymerization agent; the application is as follows: putting all the chrome corundum ramming powder into a stirrer, stirring for 1 minute, adding four fifths of binding agent, stirring for 3-4 minutes, adding a coagulant, stirring for 2-3 minutes, adding the rest binding agent until the stirring is uniform, ramming on a water-cooled wall of an air conveying conduit, naturally curing for 8-12 hours, and concentrating, dehydrating and curing the aluminum chromium phosphate colloid; in the gasification furnace baking process, the temperature of the water-cooled wall is raised to 230 ℃ and the furnace is baked for 56 hours. The invention has the advantages of excellent wear resistance, good chemical stability, small linear rate after burning, convenient construction and long service life.)

1. The high-wear-resistance chrome corundum ramming material is characterized by comprising the following components in parts by weight: 56-65 parts of chrome corundum, 0-15 parts of zirconium corundum, 6-12 parts of binding agent, 1-4 parts of reinforcing agent, 3-6 parts of coagulant, 0.3-0.5 part of explosion-proof fiber, 3-5 parts of silicon nitride, 2-4 parts of boron nitride and 0.1-0.3 part of polymerization agent.

2. The high-wear-resistance chrome corundum ramming mass as claimed in claim 1, wherein Cr in the chrome corundum is₂O₃The content is 10-15%.

3. The high-wear-resistance chrome corundum ramming mass as claimed in claim 1, wherein the binding agent is 52-58% of aluminum chromium phosphate aqueous solution.

4. The high wear-resistant chrome corundum ramming mass as claimed in claim 1, wherein the reinforcing agent is nano-grade zircon.

5. The high-wear-resistance chrome corundum ramming mass as claimed in claim 1, wherein the explosion-proof fiber is water-soluble polyvinyl alcohol fiber with the diameter of 2-3 μm.

6. The high wear-resistant chrome corundum ramming mass as claimed in claim 1, wherein the mellowing agent is carboxymethyl cellulose.

7. The use of a high wear-resistant chromite-corundum ramming mass according to any one of claims 1 to 8 for lining gas-conveying ducts of gasifiers, in particular as follows: putting the chrome corundum, the zirconium corundum, the reinforcing agent, the explosion-proof fiber, the silicon nitride, the boron nitride and the polymerization agent into a strong stirrer, stirring for 1 minute, adding four fifths of the bonding agent, stirring for 3-4 minutes, adding the coagulant, stirring for 2-3 minutes, adding the remaining one fifth of the bonding agent, and stirring uniformly; ramming the uniformly stirred chrome corundum ramming material on a water-cooled wall of an air conveying conduit, naturally curing for 8-12 hours at the temperature of 5-35 ℃, and concentrating, dehydrating and curing the aluminum chromium phosphate colloid; in the gasification furnace baking process, the temperature of the water-cooled wall is raised to 230 ℃ and the furnace is baked for 56 hours.

Technical Field

The invention relates to the technical field of chrome corundum ramming materials, in particular to a high-wear-resistance chrome corundum ramming material and application thereof.

Background

The gasification furnace is a core device for coal gas production in coal chemical industry, pulverized coal, oxygen and a small amount of steam enter a high-temperature and high-pressure gasification furnace reaction chamber under the pressurization condition, the gasification furnace is connected with the top of a synthetic gas cooler through a gas transmission guide pipe, and the lower half part inside the gas transmission guide pipe is of a water-cooled wall structure. A layer of refractory lining with the thickness of 14 mm-16 mm is rammed on the surface of the water wall, and 1900 pieces/m are arranged in the refractory lining²Left and right metal pins. The cooled circular synthetic gas in the conic outlet in the top of the gasifying furnace is chilled to 850-900 deg.c and this part of relatively light viscous slag is solidified into flyash to flush the lining of the gas pipeline directly. The abrasion of the heat-resistant steel pin and the wear-resistant refractory lining on the lower half part of the water-cooled wall refractory lining of the gas transmission pipe is serious, the RCAA-22S castable imported into France is used for the wear-resistant lining of the gas transmission pipe wall of the existing pulverized coal gasification furnace, and the service life is only about 5 months.

Disclosure of Invention

The invention aims to provide a high-wear-resistance chromium corundum ramming mass and application thereof, aiming at the defect of serious wear of the gas transmission conduit wall of a pulverized coal gasification furnace, and the ramming mass has the advantages of excellent wear resistance, good chemical stability, small linear variability after burning, convenient construction and long service life.

In order to achieve the purpose, the invention adopts the following technical scheme:

the invention provides a high-wear-resistance chrome corundum ramming mass which comprises the following components in parts by weight: 56-65 parts of chrome corundum, 0-15 parts of zirconium corundum, 6-12 parts of binding agent, 1-4 parts of reinforcing agent, 3-6 parts of coagulant, 0.3-0.5 part of explosion-proof fiber, 3-5 parts of silicon nitride, 2-4 parts of boron nitride and 0.1-0.3 part of polymerization agent.

The high-wear-resistance chrome corundum ramming material is characterized in that Cr in the chrome corundum is₂O₃The content is 10-15%.

The high-wear-resistance chrome corundum ramming mass is characterized in that the binding agent is 52-58% of aluminum chromium phosphate aqueous solution.

The high-wear-resistance chrome corundum ramming material is characterized in that the reinforcing agent is nano-grade zirconite.

The high-wear-resistance chrome corundum ramming mass is characterized in that the explosion-proof fibers are water-soluble polyvinyl alcohol fibers with the diameter of 2-3 mu m.

The high-wear-resistance chrome corundum ramming mass is characterized in that the melding agent is carboxymethyl cellulose.

The second aspect of the invention provides an application of the high wear-resistant chromium corundum ramming mass in the aspect of the lining of the gas delivery conduit of the gasification furnace, which comprises the following specific steps: putting the chrome corundum, the zirconium corundum, the reinforcing agent, the explosion-proof fiber, the silicon nitride, the boron nitride and the polymerization agent into a strong stirrer, stirring for 1 minute, adding four fifths of the bonding agent, stirring for 3-4 minutes, adding the coagulant, stirring for 2-3 minutes, adding the remaining one fifth of the bonding agent, and stirring uniformly; ramming the uniformly stirred chrome corundum ramming material on a water-cooled wall of an air conveying conduit, naturally curing for 8-12 hours at the temperature of 5-35 ℃, and concentrating, dehydrating and curing the aluminum chromium phosphate colloid; in the gasification furnace baking process, the temperature of the water-cooled wall is raised to 230 ℃ and the furnace is baked for 56 hours.

Compared with the prior art, the invention has the following beneficial effects:

the high wear-resistant chromium corundum ramming material of the invention is prepared from Cr₂O₃Solid solution chromium corundum with the content of 10-15 percent is taken as a raw material, added with zirconia corundum and formed into ZrO at high temperature₂Almost all the aluminum-chromium solid melt and corundum crystals in the glass phase are wrapped to form a continuous network structure, so that the mechanical property of the chromium corundum is greatly enhanced; the binding agent adopts chromium aluminum phosphate, and the high wear-resistant chromium corundum ramming mass can be solidified at normal temperature; the composite high-temperature colloid chromium aluminum phosphate is subjected to dehydration concentration and polymerization reaction at high temperature, and is chemically combined with chrome corundum and nano-grade zirconite and is combined with ceramics, so that the strength and the wear resistance of the chrome corundum ramming mass are obviously improved, the strength and the wear resistance of the lining are enhanced, and the service life of the lining is prolonged; the explosion-proof fiber in the corundum ramming mass adopts water-soluble polyvinyl alcohol fiber and a spiranthes agentBy adopting the carboxymethyl cellulose, the baking temperature can be greatly reduced, and the baking time can be reduced.

The high-wear-resistance chrome corundum ramming mass provided by the invention has the advantages of excellent wear resistance at high temperature, good chemical stability, small linear variability after burning, convenience in construction and long service life, and can be widely applied to the pipe wall of the gas transmission guide pipe of a coal chemical powder gasification furnace.

Detailed Description

The present invention will be further described with reference to the following examples, but the scope of the present invention is not limited to these examples. Other variations and modifications which may occur to those skilled in the art without departing from the spirit and scope of the invention are intended to be included within the scope of the invention.