CN111718185A - Gunning mix - Google Patents
Gunning mix Download PDFInfo
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- CN111718185A CN111718185A CN202010647739.7A CN202010647739A CN111718185A CN 111718185 A CN111718185 A CN 111718185A CN 202010647739 A CN202010647739 A CN 202010647739A CN 111718185 A CN111718185 A CN 111718185A
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- C04B35/03—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite
- C04B35/04—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite based on magnesium oxide
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Abstract
The invention provides a gunning mix, the formula of which comprises the following components of fused magnesite, fused pure calcium aluminate cement, graphite, alumina homogenizing material, zirconium dioxide, additive and plasticizer; the formula comprises the following raw materials in parts by weight: 20-85 parts of fused magnesia, 5-15 parts of fused pure calcium aluminate cement, 8-20 parts of graphite, 10-30 parts of alumina homogenizing material, 5-25 parts of zirconium dioxide, 1-8 parts of additive and 2-10 parts of plastic aid. The invention has higher wear resistance and thermal shock resistance, strong chemical erosion resistance, material saving and cost reduction for users, high strength, easy construction, simple preparation process and easy industrial production, and effectively prolongs the whole service life of the coal injection pipe.
Description
Technical Field
The invention relates to the technical field of refractory materials, and particularly relates to a gunning mix.
Background
The repair and maintenance of the furnace lining is an important measure for prolonging the service life of the furnace lining and reducing the consumption of refractory materials. The more repairing measures are to spray repair the furnace lining, and the local melting loss part of the furnace lining is regularly or irregularly sprayed and repaired and maintained at the middle and later stages of the use of the furnace lining, so that the service life of the furnace lining can be effectively prolonged. The spray repair comprises dry spray repair, semi-dry spray repair, wet spray repair and the like. For the furnace lining of steel making, the furnace lining is fast eroded due to the factors of high steel making and refining temperature, complex refining process, smelting of different steel grades and the like, and the furnace lining needs to be frequently gunned and maintained. The steel making lining needs to have excellent erosion resistance, so the quality of the gunning material is also required to be higher. MgO-based gunning materials are generally used to resist the erosion and scouring effects of the steel-making pyrometallurgical process.
The existing gunning material is difficult to meet the requirement of the use condition of injection in the aspects of strength, wear resistance and erosion resistance, has great difference with the gunning material in the aspects of construction mode and maintenance, and is easy to fall off after being used for a period of time due to poor combination with the original material when being maintained by adopting the gunning material, so that the service life is short, cracks or collapse phenomena easily occur on the local part, and meanwhile, the volume of the existing gunning material is large in shrinkage change when being subjected to high temperature, so that the applicant especially provides the gunning material according to the use requirement of construction.
Disclosure of Invention
In order to make up for the defects of the prior art, the invention provides the gunning mix which is convenient in material obtaining and long in service life.
The invention aims to provide a gunning mix, which comprises the following components of fused magnesite, fused pure calcium aluminate cement, graphite, an alumina homogenizing material, zirconium dioxide, an additive and a plasticizer;
the formula comprises the following raw materials in parts by weight: 20-85 parts of fused magnesia, 5-15 parts of fused pure calcium aluminate cement, 8-20 parts of graphite, 10-30 parts of alumina homogenizing material, 5-25 parts of zirconium dioxide, 1-8 parts of additive and 2-10 parts of plastic aid.
Further, the raw materials of the formula components comprise the following components in parts by weight: 60-85 parts of fused magnesia, 6-12 parts of fused pure calcium aluminate cement, 15-20 parts of graphite, 10-20 parts of alumina homogenizing material, 6-12 parts of zirconium dioxide, 2-6 parts of additive and 4-8 parts of plastic aid.
Further, the raw materials of the formula components comprise the following components in parts by weight: 80 parts of fused magnesia, 10 parts of fused pure calcium aluminate cement, 15 parts of graphite, 12 parts of alumina homogenizing material, 8 parts of zirconium dioxide, 3 parts of additive and 4 parts of plastic aid.
Furthermore, the raw material weight components of the formula components also comprise 2-6 parts of aluminum sulfate.
Further, the raw materials of the formula components comprise the following components in parts by weight: 80 parts of fused magnesia, 10 parts of fused pure calcium aluminate cement, 15 parts of graphite, 12 parts of alumina homogenizing material, 8 parts of zirconium dioxide, 3 parts of additive, 4 parts of plastic aid and 4 parts of aluminum sulfate.
Further, the additive is a mixture of aluminum powder and silicon powder, and the mixing ratio of the aluminum powder to the silicon powder is 2: 1.
Further, the plastic aid is any one of kaolin and slaked lime.
A preparation method of a gunning mix comprises the following steps:
s1, fine grinding and screening of raw materials: the fused magnesia is crushed and finely ground, and is screened into raw materials with the granularity of more than 0 mm and less than or equal to 1mm, the granularity of more than 1mm and less than or equal to 3mm and less than 200 meshes;
s2, batching: weighing the raw materials of the corresponding weight components according to the weight;
s3, mixing: and (3) dividing the fused magnesite into two different diameters and mixing the two different diameters according to the ratio of 2:1, sequentially adding fused pure calcium aluminate cement, graphite, one-half aluminum powder and silicon powder mixture, alumina homogenizing material, aluminum sulfate, zirconium dioxide and plasticizer, mixing for 10 minutes, uniformly adding the aluminum powder and silicon powder mixture twice, adding the remaining one-half aluminum powder and silicon powder mixture before discharging, mixing for 7 minutes, and discharging.
Compared with the prior art, the invention has the beneficial effects that: the invention has stronger erosion resistance and scouring resistance, prolongs the service life of the gunning material, improves the service efficiency of the converter and reduces the manufacturing cost of the gunning material; the invention has the advantages of higher wear resistance and thermal shock resistance, strong chemical erosion resistance, material saving and cost reduction for users, effective prolongation of the whole service life, high strength, easy construction, simple preparation process and easy industrial production.
Detailed Description
The following description of the present invention is provided to enable those skilled in the art to better understand the technical solutions in the embodiments of the present invention and to make the above objects, features and advantages of the present invention more comprehensible.
The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual values, and between the individual values may be combined with each other to yield one or more new ranges of values, which ranges of values should be considered as specifically disclosed herein.
A gunning mix comprises the following components of fused magnesite, fused pure calcium aluminate cement, graphite, alumina homogenizing material, zirconium dioxide, additive and plasticizer;
the formula comprises the following raw materials in parts by weight: 20-85 parts of fused magnesia, 5-15 parts of fused pure calcium aluminate cement, 8-20 parts of graphite, 10-30 parts of alumina homogenizing material, 5-25 parts of zirconium dioxide, 1-8 parts of additive and 2-10 parts of plastic aid.
In this example, the raw materials of the formulation components are as follows by weight: 60-85 parts of fused magnesia, 6-12 parts of fused pure calcium aluminate cement, 15-20 parts of graphite, 10-20 parts of alumina homogenizing material, 6-12 parts of zirconium dioxide, 2-6 parts of additive and 4-8 parts of plastic aid.
In this example, the raw materials of the formulation components are as follows by weight: 80 parts of fused magnesia, 10 parts of fused pure calcium aluminate cement, 15 parts of graphite, 12 parts of alumina homogenizing material, 8 parts of zirconium dioxide, 3 parts of additive and 4 parts of plastic aid.
In this embodiment, the raw material weight components of the formulation further include 2-6 parts of aluminum sulfate.
In this example, the raw materials of the formulation components are as follows by weight: 80 parts of fused magnesia, 10 parts of fused pure calcium aluminate cement, 15 parts of graphite, 12 parts of alumina homogenizing material, 8 parts of zirconium dioxide, 3 parts of additive, 4 parts of plastic aid and 4 parts of aluminum sulfate.
In this embodiment, the additive is a mixture of aluminum powder and silicon powder, and the mixing ratio of the aluminum powder to the silicon powder is 2: 1.
In this embodiment, the plasticizer is one of kaolin and slaked lime.
A preparation method of a gunning mix comprises the following steps:
s1, fine grinding and screening of raw materials: the fused magnesia is crushed and finely ground, and is screened into raw materials with the granularity of more than 0 mm and less than or equal to 1mm, the granularity of more than 1mm and less than or equal to 3mm and less than 200 meshes;
s2, batching: weighing the raw materials of the corresponding weight components according to the weight;
s3, mixing: and (3) dividing the fused magnesite into two different diameters and mixing the two different diameters according to the ratio of 2:1, sequentially adding fused pure calcium aluminate cement, graphite, one-half aluminum powder and silicon powder mixture, alumina homogenizing material, aluminum sulfate, zirconium dioxide and plasticizer, mixing for 10 minutes, uniformly adding the aluminum powder and silicon powder mixture twice, adding the remaining one-half aluminum powder and silicon powder mixture before discharging, mixing for 7 minutes, and discharging.
The first embodiment is as follows:
the gunning mix comprises the following raw materials in parts by weight: 85 parts of fused magnesia, 12 parts of fused pure calcium aluminate cement, 20 parts of graphite, 20 parts of alumina homogenizing material, 12 parts of zirconium dioxide, 6 parts of additive, 8 parts of plastic aid and 6 parts of aluminum sulfate;
the preparation method of the gunning mix comprises the following steps:
s1, fine grinding and screening of raw materials: the fused magnesia is crushed and finely ground, and is screened into raw materials with the granularity of more than 0 mm and less than or equal to 1mm, the granularity of more than 1mm and less than or equal to 3mm and less than 200 meshes;
s2, batching: weighing the raw materials of the corresponding weight components according to the weight;
s3, mixing: and (3) dividing the fused magnesite into two different diameters and mixing the two different diameters according to the ratio of 2:1, sequentially adding fused pure calcium aluminate cement, graphite, one-half aluminum powder and silicon powder mixture, alumina homogenizing material, aluminum sulfate, zirconium dioxide and plasticizer, mixing for 10 minutes, uniformly adding the aluminum powder and silicon powder mixture twice, adding the remaining one-half aluminum powder and silicon powder mixture before discharging, mixing for 7 minutes, and discharging.
The second embodiment is as follows:
the gunning mix comprises the following raw materials in parts by weight: 60 parts of fused magnesia, 6 parts of fused pure calcium aluminate cement, 15 parts of graphite, 10 parts of alumina homogenizing material, 6 parts of zirconium dioxide, 2 parts of additive, 4 parts of plastic aid and 2 parts of aluminum sulfate;
the preparation method of the gunning mix comprises the following steps:
s1, fine grinding and screening of raw materials: the fused magnesia is crushed and finely ground, and is screened into raw materials with the granularity of more than 0 mm and less than or equal to 1mm, the granularity of more than 1mm and less than or equal to 3mm and less than 200 meshes;
s2, batching: weighing the raw materials of the corresponding weight components according to the weight;
s3, mixing: and (3) dividing the fused magnesite into two different diameters and mixing the two different diameters according to the ratio of 2:1, sequentially adding fused pure calcium aluminate cement, graphite, one-half aluminum powder and silicon powder mixture, alumina homogenizing material, aluminum sulfate, zirconium dioxide and plasticizer, mixing for 10 minutes, uniformly adding the aluminum powder and silicon powder mixture twice, adding the remaining one-half aluminum powder and silicon powder mixture before discharging, mixing for 7 minutes, and discharging.
The third concrete embodiment:
the gunning mix comprises the following raw materials in parts by weight: 70 parts of fused magnesia, 8 parts of fused pure calcium aluminate cement, 16 parts of graphite, 15 parts of alumina homogenizing material, 6 parts of zirconium dioxide, 3 parts of additive, 5 parts of plastic aid and 3 parts of aluminum sulfate;
the preparation method of the gunning mix comprises the following steps:
s1, fine grinding and screening of raw materials: the fused magnesia is crushed and finely ground, and is screened into raw materials with the granularity of more than 0 mm and less than or equal to 1mm, the granularity of more than 1mm and less than or equal to 3mm and less than 200 meshes;
s2, batching: weighing the raw materials of the corresponding weight components according to the weight;
s3, mixing: and (3) dividing the fused magnesite into two different diameters and mixing the two different diameters according to the ratio of 2:1, sequentially adding fused pure calcium aluminate cement, graphite, one-half aluminum powder and silicon powder mixture, alumina homogenizing material, aluminum sulfate, zirconium dioxide and plasticizer, mixing for 10 minutes, uniformly adding the aluminum powder and silicon powder mixture twice, adding the remaining one-half aluminum powder and silicon powder mixture before discharging, mixing for 7 minutes, and discharging.
The fourth concrete embodiment:
the gunning mix comprises the following raw materials in parts by weight: 80 parts of fused magnesia, 12 parts of fused pure calcium aluminate cement, 15 parts of graphite, 15 parts of alumina homogenizing material, 10 parts of zirconium dioxide, 5 parts of additive, 5 parts of plasticizer and 5 parts of aluminum sulfate;
the preparation method of the gunning mix comprises the following steps:
s1, fine grinding and screening of raw materials: the fused magnesia is crushed and finely ground, and is screened into raw materials with the granularity of more than 0 mm and less than or equal to 1mm, the granularity of more than 1mm and less than or equal to 3mm and less than 200 meshes;
s2, batching: weighing the raw materials of the corresponding weight components according to the weight;
s3, mixing: and (3) dividing the fused magnesite into two different diameters and mixing the two different diameters according to the ratio of 2:1, sequentially adding fused pure calcium aluminate cement, graphite, one-half aluminum powder and silicon powder mixture, alumina homogenizing material, aluminum sulfate, zirconium dioxide and plasticizer, mixing for 10 minutes, uniformly adding the aluminum powder and silicon powder mixture twice, adding the remaining one-half aluminum powder and silicon powder mixture before discharging, mixing for 7 minutes, and discharging.
The fifth concrete embodiment:
the gunning mix comprises the following raw materials in parts by weight: 75 parts of fused magnesia, 8 parts of fused pure calcium aluminate cement, 15 parts of graphite, 12 parts of alumina homogenizing material, 8 parts of zirconium dioxide, 4 parts of additive, 6 parts of plastic aid and 4 parts of aluminum sulfate.
The preparation method of the gunning mix comprises the following steps:
s1, fine grinding and screening of raw materials: the fused magnesia is crushed and finely ground, and is screened into raw materials with the granularity of more than 0 mm and less than or equal to 1mm, the granularity of more than 1mm and less than or equal to 3mm and less than 200 meshes;
s2, batching: weighing the raw materials of the corresponding weight components according to the weight;
s3, mixing: and (3) dividing the fused magnesite into two different diameters and mixing the two different diameters according to the ratio of 2:1, sequentially adding fused pure calcium aluminate cement, graphite, one-half aluminum powder and silicon powder mixture, alumina homogenizing material, aluminum sulfate, zirconium dioxide and plasticizer, mixing for 10 minutes, uniformly adding the aluminum powder and silicon powder mixture twice, adding the remaining one-half aluminum powder and silicon powder mixture before discharging, mixing for 7 minutes, and discharging.
The sixth specific embodiment:
the gunning mix comprises the following raw materials in parts by weight: 60 parts of fused magnesia, 8 parts of fused pure calcium aluminate cement, 15 parts of graphite, 11 parts of alumina homogenizing material, 6 parts of zirconium dioxide, 3 parts of additive, 4 parts of plastic aid and 3 parts of aluminum sulfate;
the preparation method of the gunning mix comprises the following steps:
s1, fine grinding and screening of raw materials: the fused magnesia is crushed and finely ground, and is screened into raw materials with the granularity of more than 0 mm and less than or equal to 1mm, the granularity of more than 1mm and less than or equal to 3mm and less than 200 meshes;
s2, batching: weighing the raw materials of the corresponding weight components according to the weight;
s3, mixing: and (3) dividing the fused magnesite into two different diameters and mixing the two different diameters according to the ratio of 2:1, sequentially adding fused pure calcium aluminate cement, graphite, one-half aluminum powder and silicon powder mixture, alumina homogenizing material, aluminum sulfate, zirconium dioxide and plasticizer, mixing for 10 minutes, uniformly adding the aluminum powder and silicon powder mixture twice, adding the remaining one-half aluminum powder and silicon powder mixture before discharging, mixing for 7 minutes, and discharging.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (8)
1. The gunning mix is characterized in that the gunning mix formula comprises the following components of fused magnesia, fused pure calcium aluminate cement, graphite, alumina homogenizing material, zirconium dioxide, an additive and a plasticizer;
the formula comprises the following raw materials in parts by weight: 20-85 parts of fused magnesia, 5-15 parts of fused pure calcium aluminate cement, 8-20 parts of graphite, 10-30 parts of alumina homogenizing material, 5-25 parts of zirconium dioxide, 1-8 parts of additive and 2-10 parts of plastic aid.
2. The gunning mix as claimed in claim 1, wherein the raw materials of the formula components by weight are as follows: 60-85 parts of fused magnesia, 6-12 parts of fused pure calcium aluminate cement, 15-20 parts of graphite, 10-20 parts of alumina homogenizing material, 6-12 parts of zirconium dioxide, 2-6 parts of additive and 4-8 parts of plastic aid.
3. The gunning mix as claimed in claim 1, wherein the raw materials of the formula components by weight are as follows: 80 parts of fused magnesia, 10 parts of fused pure calcium aluminate cement, 15 parts of graphite, 12 parts of alumina homogenizing material, 8 parts of zirconium dioxide, 3 parts of additive and 4 parts of plastic aid.
4. The gunning mix as claimed in claim 1, wherein the raw material weight components of the formulation further comprise aluminium sulphate 2-6 parts.
5. The gunning mix as claimed in claim 1, wherein the raw materials of the formula components by weight are as follows: 80 parts of fused magnesia, 10 parts of fused pure calcium aluminate cement, 15 parts of graphite, 12 parts of alumina homogenizing material, 8 parts of zirconium dioxide, 3 parts of additive, 4 parts of plastic aid and 4 parts of aluminum sulfate.
6. The gunning mix as claimed in claim 1, wherein the additive is a mixture of aluminum powder and silicon powder, and the mixing ratio of the aluminum powder to the silicon powder is 2: 1.
7. The gunning mix according to claim 1, wherein the plasticizer is one of kaolin and slaked lime.
8. A method of producing a gunning material according to any one of claims 1 to 7, comprising the steps of:
s1, fine grinding and screening of raw materials: the fused magnesia is crushed and finely ground, and is screened into raw materials with the granularity of more than 0 mm and less than or equal to 1mm, the granularity of more than 1mm and less than or equal to 3mm and less than 200 meshes;
s2, batching: weighing the raw materials of the corresponding weight components according to the weight;
s3, mixing: and (3) dividing the fused magnesite into two different diameters and mixing the two different diameters according to the ratio of 2:1, sequentially adding fused pure calcium aluminate cement, graphite, one-half aluminum powder and silicon powder mixture, alumina homogenizing material, aluminum sulfate, zirconium dioxide and plasticizer, mixing for 10 minutes, uniformly adding the aluminum powder and silicon powder mixture twice, adding the remaining one-half aluminum powder and silicon powder mixture before discharging, mixing for 7 minutes, and discharging.
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| CN202010647739.7A CN111718185A (en) | 2020-07-07 | 2020-07-07 | Gunning mix |
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| CN202010647739.7A CN111718185A (en) | 2020-07-07 | 2020-07-07 | Gunning mix |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114368963A (en) * | 2022-01-20 | 2022-04-19 | 山东潍耐节能材料有限公司 | Preparation method of hot repair gunning material for large coke oven |
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Application publication date: 20200929 |