Preparation method of anti-corrosion and wear-resistant material for repairing lining of garbage incinerator

Abstract

The invention discloses a preparation method of a corrosion-resistant and wear-resistant material for repairing a lining of a garbage incinerator, and the preparation method comprises the following steps: S1, preparing base materials including corundum, mullite, alumina, silicon carbide and calcium aluminate; s2, mixing the base material prepared in the S1, adding auxiliary raw materials and the balance of water, wherein the auxiliary raw materials comprise a dispersing agent, protective fibers and a coagulation accelerator; s3, the mixed raw materials are fed into a reaction kettle to be mixed and stirred, the mixed raw materials are filtered, after large particles are filtered out, the raw materials are fed into a stirrer to a construction site, an aqueous solution is additionally added, and a flowing castable is formed; and S4, taking a flowing pouring material, pouring in a fixed mold, and curing the pouring material to obtain the corrosion-resistant and wear-resistant lining. Compared with the prior art, the preparation method of the corrosion-resistant and wear-resistant material for repairing the lining of the garbage incinerator has the advantages that the fire resistance is good, the use requirement is met, and the corrosion-resistant and wear-resistant effects are achieved.

Description

Technical Field

[0001] The invention relates to the field of refractory material preparation, and in particular to a method for preparing a corrosion-resistant and wear-resistant material for repairing the inner lining of a garbage incinerator. Background Art

[0002] In recent years, with the rapid development of economy and science and technology, industrial solid waste has also increased dramatically. Industrial solid waste is also called industrial hazardous waste. Compared with ordinary solid waste, hazardous waste is more harmful, with large quantity, high pollution and complex composition. Some pollutants are also corrosive, infectious and radioactive. If not properly disposed of, it will threaten the environment and human life and health.

[0003] As one of the effective ways to deal with industrial and domestic waste, waste incineration technology has been increasingly used, and waste incinerators are the most important equipment for incineration technology. The waste melting furnace melts the waste ash at 1300-1600℃, and uses a burner of fossil fuels such as heavy oil to create a strong oxidizing atmosphere in the furnace.

[0004] The lining of a waste incinerator needs to be repaired during use, but the existing refractory materials are mostly made of bauxite or clay as the main materials, which cannot meet the needs of large-scale incinerators and increasingly deteriorating working conditions. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the above technical defects and provide a method for preparing a corrosion-resistant and wear-resistant material for repairing the lining of a waste incinerator, which has good fire resistance, meets the use requirements and has corrosion-resistant and wear-resistant effects.

[0006] In order to solve the above technical problems, the technical solution provided by the present invention is: a method for preparing a corrosion-resistant and wear-resistant material for repairing the lining of a waste incinerator, comprising the following steps: S1: preparing a base material, including corundum, mullite, alumina, silicon carbide, and calcium aluminate; S2: mixing the base material prepared in S1 with auxiliary raw materials and the remainder of water, wherein the auxiliary raw materials include a dispersant, a protective fiber, and a coagulant; S3: sending the mixed raw materials into a reactor for mixing and stirring, filtering the mixed raw materials, filtering out large particles, and sending them into a mixer to a construction site to add additional aqueous solution to form a fluid castable; S4: taking the fluid castable and casting it in a fixed mold, and curing the castable to obtain a corrosion-resistant and wear-resistant lining.

[0007] Preferably, the weight ratio of each component in S1 is 55% to 65% of corundum, 20% to 30% of mullite, 2% to 8% of alumina, 3% to 6% of silicon carbide, and 2% to 5% of calcium aluminate.

[0008] Preferably, the weight ratio of each component in S1 is 60% of corundum, 27% of mullite, 7% of alumina, 5% of silicon carbide, and 4% of calcium aluminate.

[0009] Preferably, the weight ratio of each component in S1 is 65% of corundum, 22% of mullite, 5% of alumina, 6% of silicon carbide, and 2% of calcium aluminate.

[0010] Preferably, the weight ratio of each component in S1 is 55% of corundum, 29% of mullite, 8% of alumina, 3% of silicon carbide, and 5% of calcium aluminate.

[0011] Preferably, the base materials in S2 are mixed and then ball-milled, and auxiliary raw materials are added after the grinding. The ball-milling time is 3.5h to 5h, and the base materials are sieved after ball-milling, and the particle size is less than 2mm.

[0012] Preferably, the speed of the reactor in S3 is 60 to 80 r / min, and the stirring time is 90 to 125 min.

[0013] Preferably, the weight ratio of the auxiliary raw materials is 5% to 12%, wherein the ratio of the dispersant, the coagulant and the explosion-proof fiber is 1 to 1.5: 3 to 3.5: 5 to 6.5.

[0014] The advantages of the present invention compared with the prior art are: in the present invention, by adjusting the raw material ratio, corundum, mullite, alumina, silicon carbide, and calcium aluminate are selected as the main raw materials, and explosion-proof fiber is added, while ensuring the fire resistance of the raw materials, the explosion-proof property is improved. The silicon carbide and other elements in the raw materials enhance the corrosion resistance and wear resistance of the raw materials, thereby greatly improving the service life in the incinerator. The present invention can be mainly used in areas with severe corrosion and wear such as the feed inlet and drying section of the garbage incinerator. DETAILED DESCRIPTION

[0015] References to embodiments of the present invention will now be provided in detail, one or more examples of which are described below. Each example is provided as an explanation rather than a limitation of the present invention. In fact, it will be apparent to those skilled in the art that various modifications and variations may be made to the present invention without departing from the scope or spirit of the present invention. For example, a feature illustrated or described as part of one embodiment may be used in another embodiment to produce a further embodiment.

[0016] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0017] Except as indicated in the operating examples, or where otherwise indicated, all numbers expressing quantities of ingredients, physicochemical properties, and so forth used in the specification and claims are to be understood as being modified in all instances by the term "about".

[0018] For example, therefore, unless indicated to the contrary, the numerical parameters set forth in the foregoing specification and attached claims are approximations that can be appropriately varied by those skilled in the art utilizing the teachings disclosed herein to obtain the desired properties sought.

[0019] The use of numerical ranges by endpoints includes all numbers within that range and any range within that range, for example, 1 to 5 includes 1, 1.1, 1.3, 1.5, 2, 2.75, 3, 3.80, 4, and 5 and so forth.

[0020] A method for preparing a corrosion-resistant and wear-resistant material for repairing the inner lining of a garbage incinerator comprises the following steps:

[0021] S1: prepare base materials, including corundum, mullite, alumina, silicon carbide, and calcium aluminate;

[0022] S2: mixing the base material prepared in S1 with auxiliary raw materials and the remaining amount of water, wherein the auxiliary raw materials include a dispersant, protective fiber and a coagulant;

[0023] S3: The mixed raw materials are sent into a reactor for mixing and stirring, and the mixed raw materials are filtered to filter out large particles and then sent into a mixer to the construction site to add additional aqueous solution to form a fluid casting material;

[0024] S4: Take the fluid castable material and cast it in a fixed mold, and cure the castable material to obtain a corrosion-resistant and wear-resistant lining.

[0025] In the specific implementation of the present invention, the weight ratio of each component in S1 is 55% to 65% of corundum, 20% to 30% of mullite, 2% to 8% of alumina, 3% to 6% of silicon carbide, and 2% to 5% of calcium aluminate.

[0026] The weight ratio of the auxiliary raw materials is 5% to 12%, wherein the ratio of the dispersant, the coagulant and the explosion-proof fiber is 1 to 1.5: 3 to 3.5: 5 to 6.5.

[0027] The base materials in S2 are mixed and then ball-milled, and auxiliary raw materials are added after the grinding. The ball milling time is 3.5h to 5h, and the particles are sieved after ball milling, and the particle size is less than 2mm. The speed of the reactor in S3 is 60 to 80r / min, and the stirring time is 90 to 125min.

[0028] In one embodiment:

[0029] The weight ratio of each component is 60% corundum, 27% mullite, 7% alumina, 5% silicon carbide, and 4% calcium aluminate. The ratio of dispersant, coagulant, and explosion-proof fiber is 1:3:5. The ball milling time is 5 hours. After ball milling, the particle size is sieved <2mm. The speed of the reactor in S3 is 65r / min, and the stirring time is 120min.

[0030] In one embodiment:

[0031] The weight ratio of each component is 65% corundum, 22% mullite, 5% alumina, 6% silicon carbide, and 2% calcium aluminate. The ratio of dispersant, coagulant, and explosion-proof fiber is 1.2:3:5.5. The ball milling time is 4.5 hours. After ball milling, the particle size is sieved <2mm. The speed of the reactor in S3 is 75r / min, and the stirring time is 110min.

[0032] In one embodiment:

[0033] The weight ratio of each component is 55% corundum, 29% mullite, 8% alumina, 3% silicon carbide, 5% calcium aluminate, the ratio of dispersant, coagulant, and explosion-proof fiber is 1.5:3.5:5, the ball milling time is 5 hours, and the particle size is sieved after ball milling. The speed of the reactor in S3 is 80r / min, and the stirring time is 90min.

[0034] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0035] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0036] The present invention and its implementation methods are described above, and such description is not restrictive. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design structures and embodiments similar to the technical solution without creativity, which should all fall within the protection scope of the present invention.

Claims

1. A method for preparing a corrosion-resistant and wear-resistant material for repairing the lining of a waste incinerator, characterized in that: The following steps are involved: S1: prepare base materials, including corundum, mullite, alumina, silicon carbide, and calcium aluminate; S2: mixing the base material prepared in S1 with auxiliary raw materials and the remaining amount of water, wherein the auxiliary raw materials include a dispersant, protective fiber and a coagulant; S3: The mixed raw materials are sent into a reactor for mixing and stirring, and the mixed raw materials are filtered to filter out large particles and then sent into a mixer to the construction site to add additional aqueous solution to form a fluid casting material; S4: Take the fluid castable material and cast it in a fixed mold, and cure the castable material to obtain a corrosion-resistant and wear-resistant lining.

2. The method for preparing a corrosion-resistant and wear-resistant material for repairing the inner lining of a waste incinerator according to claim 1, characterized in that: The weight ratio of each component in S1 is 55% to 65% of corundum, 20% to 30% of mullite, 2% to 8% of alumina, 3% to 6% of silicon carbide, and 2% to 5% of calcium aluminate.

3. The method for preparing a corrosion-resistant and wear-resistant material for repairing the inner lining of a waste incinerator according to claim 2, characterized in that: The weight ratio of each component in S1 is 60% of corundum, 27% of mullite, 7% of alumina, 5% of silicon carbide and 4% of calcium aluminate.

4. The method for preparing a corrosion-resistant and wear-resistant material for repairing the inner lining of a waste incinerator according to claim 2, characterized in that: The weight ratio of each component in S1 is 65% of corundum, 22% of mullite, 5% of alumina, 6% of silicon carbide and 2% of calcium aluminate.

5. The method for preparing a corrosion-resistant and wear-resistant material for repairing the inner lining of a waste incinerator according to claim 2, characterized in that: The weight ratio of each component in S1 is 55% of corundum, 29% of mullite, 8% of alumina, 3% of silicon carbide and 5% of calcium aluminate.

6. The method for preparing a corrosion-resistant and wear-resistant material for repairing the inner lining of a waste incinerator according to claim 1, characterized in that: The base materials in S2 are mixed and then ball-milled, and auxiliary raw materials are added after the grinding. The ball-milling time is 3.5 hours to 5 hours. After ball-milling, the base materials are sieved and the particle size is less than 2 mm.

7. The method for preparing a corrosion-resistant and wear-resistant material for repairing the inner lining of a waste incinerator according to claim 1, characterized in that: The speed of the reactor in S3 is 60-80 r / min, and the stirring time is 90-125 min.

8. The method for preparing a corrosion-resistant and wear-resistant material for repairing the inner lining of a waste incinerator according to claim 6, characterized in that: The weight ratio of the auxiliary raw materials is 5% to 12%, wherein the ratio of the dispersant, the coagulant and the explosion-proof fiber is 1 to 1.5: 3 to 3.5: 5 to 6.5.