CN115572155A - Wear-resistant corrosion-resistant refractory material for hazardous waste garbage incinerator and preparation method thereof - Google Patents
Wear-resistant corrosion-resistant refractory material for hazardous waste garbage incinerator and preparation method thereof Download PDFInfo
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Abstract
The invention belongs to the field of refractory material preparation, and discloses a preparation method of a wear-resistant corrosion-resistant refractory material for a hazardous waste incinerator, which is characterized in that the refractory material comprises the following components in percentage by mass: (1) grain size of 0.074mm < 3mm (corundum, al) 2 O 3 ) 75 to 82 percent; (2) grain diameter of more than 0.074mm and less than or equal to 2mm (chromium oxide, cr) 2 O 3 ) 7 to 10 percent; (3) the grain size is less than or equal to 0.074mm (lanthanum oxide, la) 2 O 3 ) 2 to 5 percent; (4) 2-5% of silicon carbide (SiC) with the granularity of less than or equal to 0.074 mm; (5) 1 to 1.5 percent of additive; (6) 5 to 10 percent of binding agent. The invention has the characteristics of good wear resistance, erosion resistance and the like, can be applied to areas with serious corrosion and abrasion of the feed inlet, the drying section and the like of the garbage incinerator, and has wide market prospect.
Description
Technical Field
The invention belongs to the field of refractory material preparation, and particularly relates to a preparation method of a wear-resistant corrosion-resistant refractory material for a hazardous waste incinerator.
Background
In recent years, industrial solid waste has also been rapidly growing in the background of rapid development of economy and technology. Compared with common solid wastes, the industrial solid wastes are also called industrial hazardous waste wastes, the hazardous waste wastes have higher harmfulness, have the characteristics of large quantity, high pollution, complex components and the like, and part of pollutants have corrosivity, infectivity, radioactivity and the like, so that the environmental and human life health can be threatened if the pollutants are not reasonably disposed.
The hazardous waste incineration treatment method has the advantages of large capacity reduction and high harmless degree, and can also recover heat generated in the combustion process through a waste heat boiler, so the hazardous waste incineration treatment method becomes the most effective hazardous waste treatment method. Compared with common household garbage incineration, the national environmental protection agency has stricter requirements on various indexes of dangerous waste garbage incineration, and punishment is higher.
The hazardous waste incineration is carried out in an incinerator, the calcination temperature is generally higher than 1200 ℃, harmful elements in the hazardous waste garbage such as fluoride, chloride, heavy metal ions, industrial solid waste residue blocks and the like can generate mechanical abrasion, adhesion and erosion on refractory materials of the incinerator, and the operation of the incinerator is seriously influenced. The safe and reliable operation of the garbage incinerator depends on the stable and reliable quality of refractory materials, reasonable design, material selection and efficient maintenance of the refractory materials. At present, refractory products mainly made of bauxite and clay cannot meet the requirements of large-scale and increasingly worsened working conditions of the incinerator, and the product structure of the refractory for the incinerator is gradually changed. Meanwhile, under the situation that the national environmental protection control is increasingly strict, the refractory industry faces unprecedented challenges.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a preparation method of a wear-resistant corrosion-resistant refractory material for a hazardous waste incinerator.
The invention is realized in such a way that the wear-resistant corrosion-resistant refractory material for the hazardous waste incinerator is characterized in that the refractory material comprises the following components in percentage by mass:
(1) grain size of more than 0.074mm and less than or equal to 3mm (corundum, al) 2 O 3 ) 75 to 82 percent; (2) grain diameter of more than 0.074mm and less than or equal to 2mm (chromium oxide, cr) 2 O 3 ) 7 to 10 percent; (3) the grain size is less than or equal to 0.074mm (lanthanum oxide, la) 2 O 3 ) 2 to 5 percent; (4) 2-5% of silicon carbide (SiC) with the granularity of less than or equal to 0.074 mm; (5) 1 to 1.5 percent of additive; (6) 5 to 10 percent of binding agent.
Further, the additive is one or more of explosion-proof fiber, sodium tripolyphosphate, sodium hexametaphosphate, sodium lignosulfonate or carboxylic ester.
Further, the binding agent is pure calcium aluminate cement.
Further, the preparation method comprises the following steps:
firstly, (1) 0.074mm < grain size is less than or equal to 3mm (corundum, al) 2 O 3 ) 80% -83%; (2) grain diameter of more than 0.074mm and less than or equal to 2mm (chromium oxide, cr) 2 O 3 ) 7 to 10 percent; (3) the grain size is less than or equal to 0.074mm (lanthanum oxide, la) 2 O 3 ) 2 to 5 percent; (4) premixing 2-5% of silicon carbide (SiC) with the granularity less than or equal to 0.074 mm;
adding 1-1.5% of additive and 5-10% of binding agent, stirring for 3min by a forced stirrer, adding 6-8% of water by weight, stirring to obtain a castable with certain fluidity, and casting and molding the castable in a specific mold to obtain a strength detection sample, a wear-resistant detection sample and a crucible anti-corrosion sample according to the requirements of industrial detection standards;
and after the sample is formed, the performance index of the sample is detected after natural curing, demoulding, drying and corresponding heat treatment.
Further, the preparation method of the wear-resistant corrosion-resistant refractory material for the hazardous waste garbage incinerator is characterized by using a GB/T22459.4 normal-temperature bending-resistant bonding strength experimental method, the refractory castable is made into a standard required test block, and after high-temperature heat treatment at 1250 ℃ for 3h, the wear-resistant corrosion-resistant performance is judged according to the cold bending strength.
By combining the technical scheme and the technical problem to be solved, the technical scheme to be protected by the invention has the advantages and positive effects that:
the product has the characteristics of good wear resistance, corrosion resistance and the like, can be applied to areas with serious corrosion and wear at the feed inlet, the drying section and other parts of the garbage incinerator, and has wide market prospect.
The embodiment of the invention has the advantages of simple structure and obvious effect, and the first air port and the cross flow fan are fixedly designed, so that the structure is simple, the installation and the disassembly are convenient and quick, and the working efficiency is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow chart of a preparation method of the wear-resistant corrosion-resistant refractory material for the hazardous waste garbage incinerator, provided by the embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
This section is an explanatory embodiment expanding on the claims so as to fully understand how the present invention is embodied by those skilled in the art.
The wear-resistant corrosion-resistant refractory material for the hazardous waste garbage incinerator is prepared from the following components in percentage by mass:
(1) the grain diameter is more than 0.074mm and less than or equal to 3mm (corundum, al2O 3) by 80 percent; (2) the grain diameter is more than 0.074mm and less than or equal to 2mm (chromium oxide, cr2O 3) by 7 percent; (3) the granularity is less than or equal to 0.074mm (lanthanum oxide, la2O 3) 2 percent; (4) 2 percent of silicon carbide and SiC with the particle size less than or equal to 0.074mm are premixed; then adding 1 percent of additive and 5 percent of bonding agent, stirring for 3min by a forced stirrer, and adding 6 percent of water by weight. The results of the measurements are shown in Table 1 below.
TABLE 1 Material Property testing Table
The preparation method of the wear-resistant corrosion-resistant refractory material for the hazardous waste garbage incinerator, provided by the embodiment of the invention, comprises the following steps:
firstly, (1) 0.074mm < grain size is less than or equal to 3mm (corundum, al) 2 O 3 ) 80 to 83 percent; (2) grain diameter of more than 0.074mm and less than or equal to 2mm (chromium oxide, cr) 2 O 3 ) 7 to 10 percent; (3) the grain size is less than or equal to 0.074mm (lanthanum oxide, la) 2 O 3 ) 2 to 5 percent; (4) premixing 2-5% of silicon carbide (SiC) with the granularity less than or equal to 0.074 mm;
adding 1-1.5% of additive and 5-10% of binding agent, stirring for 3min by a forced stirrer, adding 6-8% of water by weight, stirring to obtain a castable with certain fluidity, and casting and molding the castable in a specific mold to obtain a strength detection sample, a wear-resistant detection sample and a crucible anti-corrosion sample according to the requirements of industrial detection standards;
and after the sample is formed, the performance index of the sample is detected after natural curing, demoulding, drying and corresponding heat treatment.
Further, the preparation method of the wear-resistant corrosion-resistant refractory material for the hazardous waste incinerator is characterized by a GB/T22459.4 normal-temperature breaking bond strength experiment method, the refractory castable is made into a standard required test block, and after high-temperature heat treatment at 1250 ℃ for 3h, the wear-resistant corrosion-resistant performance is judged according to the cold breaking strength.
The above description is only for the purpose of illustrating the embodiments of the present invention, and the scope of the present invention should not be limited thereto, and any modifications, equivalents and improvements made by those skilled in the art within the technical scope of the present invention as disclosed in the present invention should be covered by the scope of the present invention.
Claims (6)
1. The wear-resistant corrosion-resistant refractory material for the hazardous waste garbage incinerator is characterized by comprising the following components in percentage by mass:
Al 2 O 3 75％～82％，Cr 2 O 3 7％～10％，La 2 O 3 2-5%, siC 2-5%, additive 1-1.5%, and binder 5-10%.
2. The wear-resistant corrosion-resistant refractory material for the hazardous waste garbage incinerator according to claim 1, wherein 0.074mm < Al with particle size less than or equal to 3mm in (1) 2 O 3 (ii) a (2) Cr with grain size of more than 0.074mm and less than or equal to 2mm 2 O 3 (ii) a (3) La with granularity less than or equal to 0.074mm 2 O 3 (ii) a (4) SiC with the granularity of less than or equal to 0.074 mm; (5) 1 to 1.5 percent of additive; (6) a binding agent.
3. The wear-resistant corrosion-resistant refractory material for the hazardous waste garbage incinerator according to claim 1, wherein the additive is one or more of explosion-proof fiber, sodium tripolyphosphate, sodium hexametaphosphate, sodium lignosulfonate or carboxylic ester.
4. The wear-resistant corrosion-resistant refractory material for the hazardous waste incinerator according to claim 1, characterized in that the binder is pure calcium aluminate cement.
5. A preparation method of a wear-resistant corrosion-resistant refractory material for a hazardous waste incinerator is characterized by comprising the following steps:
s1: the grain diameter of (1) is more than 0.074mm and less than or equal to 3mm (corundum, al) 2 O 3 ) 80% -83%; (2) grain diameter of more than 0.074mm and less than or equal to 2mm (chromium oxide, cr) 2 O 3 ) 7 to 10 percent; (3) the grain size is less than or equal to 0.074mm (lanthanum oxide, la) 2 O 3 ) 2 to 5 percent; (4) 2 to 5 percent of silicon carbide (SiC) with the particle size of less than or equal to 0.074mm is premixed;
s2: adding 1-1.5% of additive and 5-10% of binding agent, stirring for 3min by using a forced stirrer, adding 6-8% of water by weight, stirring to obtain a castable with certain fluidity, and casting and molding the castable in a specific mold to obtain a strength detection sample, a wear-resistant detection sample and a crucible anti-corrosion sample according to the requirements of industrial detection standards;
s3: and after the sample is formed, the performance index of the sample is detected after natural curing, demoulding, drying and corresponding heat treatment.
6. The method for preparing the wear-resistant corrosion-resistant refractory material for the hazardous waste garbage incinerator according to claim 4, wherein the method for preparing the wear-resistant corrosion-resistant refractory material for the hazardous waste garbage incinerator is characterized by using a GB/T22459.4 normal temperature bending bonding strength test method, a refractory castable is made into a standard requirement test block, and after high temperature heat treatment at 1250 ℃ for 3h, the wear-resistant corrosion-resistant performance is judged according to the cold bending strength.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1458124A (en) * | 2003-05-30 | 2003-11-26 | 宜兴市东兴耐火材料有限公司 | Refractory material for pure oxygen two-stage funace |
| CN101239829A (en) * | 2008-03-11 | 2008-08-13 | 郑州市鑫磊冶金材料有限公司 | High-performance fire-resistant abrasion-proof composite material |
| CN105924189A (en) * | 2016-04-26 | 2016-09-07 | 江苏森鑫联科技有限公司 | Rare earth reinforced corundum silicon carbide castable and preparation method thereof |
| CN111439993A (en) * | 2020-04-09 | 2020-07-24 | 通达耐火技术股份有限公司 | Chromium corundum castable for hazardous waste rotary kiln |
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- 2022-10-26 CN CN202211314676.9A patent/CN115572155A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1458124A (en) * | 2003-05-30 | 2003-11-26 | 宜兴市东兴耐火材料有限公司 | Refractory material for pure oxygen two-stage funace |
| CN101239829A (en) * | 2008-03-11 | 2008-08-13 | 郑州市鑫磊冶金材料有限公司 | High-performance fire-resistant abrasion-proof composite material |
| CN105924189A (en) * | 2016-04-26 | 2016-09-07 | 江苏森鑫联科技有限公司 | Rare earth reinforced corundum silicon carbide castable and preparation method thereof |
| CN111439993A (en) * | 2020-04-09 | 2020-07-24 | 通达耐火技术股份有限公司 | Chromium corundum castable for hazardous waste rotary kiln |
Non-Patent Citations (1)
| Title |
|---|
| 刘德昌等, 中国电力出版社 * |
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