CN110255980B - Calcareous anti-sticking slag spray coating for converter mouth - Google Patents
Calcareous anti-sticking slag spray coating for converter mouth Download PDFInfo
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- CN110255980B CN110255980B CN201910699240.8A CN201910699240A CN110255980B CN 110255980 B CN110255980 B CN 110255980B CN 201910699240 A CN201910699240 A CN 201910699240A CN 110255980 B CN110255980 B CN 110255980B
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/28—Polysaccharides or derivatives thereof
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00482—Coating or impregnation materials
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/76—Use at unusual temperatures, e.g. sub-zero
- C04B2111/763—High temperatures
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Ceramic Products (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
The invention belongs to the technical field of refractory materials, and particularly relates to a calcareous anti-sticking slag spray coating for a converter mouth. The water-soluble fertilizer is prepared by adding water into the following raw materials in percentage by weight: 85-90% of calcium carbonate powder, 2-5% of metal zirconium powder, 2-5% of silicon carbide powder, 1-3% of dispersing agent and 2-4% of thickening agent; wherein the dispersant is one or more of carbon black, petroleum coke powder and graphite, and the thickener is prepared from starch and xanthan gum powder according to the weight ratio of 1-2: 1-2 by weight ratio. The calcareous slag-adhesion-preventing spray coating disclosed by the invention is simple in formula, convenient to prepare and good in slag-adhesion-preventing effect, steel spraying is carried out once every three smelting furnaces, 6-10 furnace spraying can be carried out once after continuous spraying is carried out twice, the spraying time is 1-3 min each time, the slag-removing time is only 8-12 min, the slag-removing time is saved, the steel-making time is increased, and the economic benefit is higher.
Description
Technical Field
The invention belongs to the technical field of refractory materials, and particularly relates to a calcareous anti-sticking slag spray coating for a converter mouth.
Background
The equipment for converter steelmaking in an iron and steel plant often has a serious slag adhesion phenomenon in the use process, the size of a converter mouth can be influenced after the slag adhesion of the converter mouth becomes more and becomes thicker, when the converter mouth shrinks, the speed of pouring molten iron and adding scrap steel is reduced, and an oxygen lance can also descend. Because the sticky slag is firmly bonded with the refractory material on the equipment, the slag is very difficult to remove, the average slag removal time is 30-40 min, the slag removing time is long, and the steel making is delayed. At present, various measures are taken for reducing slag adhesion in various steel plants, a converter mouth is generally sprayed by using a spray coating, the spray coating wraps the converter mouth, and the slag adhesion in steel making is prevented from being attached to the converter mouth by utilizing the separation effect of substances in the spray coating, liquid slag of the converter and residual molten steel, so that the slag adhesion prevention effect is realized.
In the prior art, bauxite is mostly adopted as a main raw material of the slag-sticking-preventing spray coating, so that the cost is high, and the bauxite reacts slowly, so that the slag-sticking-preventing effect is general. Chinese patent CN1429677A discloses a calcium oxide coating for preventing slag sticking of steel-making container, which is prepared from limestone, slaked lime and SiO2The coating is prepared from micro powder, sodium tripolyphosphate, water glass, paper fiber and other raw materials, has the advantages of good slag resistance, high temperature resistance and the like, but in the scheme, limestone and slaked stoneThe ash binds and causes the spray paint to be produced to agglomerate quickly, and the agitated slurry must be used up in a short time or the spray gun barrel can easily become clogged. The raw material contains sodium tripolyphosphate, and the sodium tripolyphosphate can be thermally decomposed at high temperature to generate irritant gas and toxic gas (such as phosphorus oxide and sodium oxide), so that the sodium tripolyphosphate has certain potential safety hazard.
Disclosure of Invention
The invention aims to solve the defects of long slagging time, quick coagulation of slag adhesion preventing spray coating and poor slag adhesion preventing effect in the prior art when the slag adhesion at the converter mouth is treated, and provides a calcareous slag adhesion preventing spray coating for the converter mouth.
In order to achieve the purpose, the invention adopts the technical scheme that:
a calcareous anti-sticking slag spray coating for a converter mouth is prepared by adding water into the following raw materials in percentage by weight: 85-90% of calcium carbonate powder, 2-5% of metal zirconium powder, 2-5% of silicon carbide powder, 1-3% of dispersing agent and 2-4% of thickening agent;
the thickening agent is formed by mixing starch and xanthan gum powder according to the weight ratio of 1-2: 1-2;
the mass of the water is 30-40% of the total weight of the raw materials.
Further, the water-soluble fertilizer is prepared by adding water into the following raw materials in percentage by weight: 88% of calcium carbonate powder, 3% of metal zirconium powder, 4% of silicon carbide powder, 2% of dispersing agent and 3% of thickening agent;
the thickening agent is formed by mixing starch and xanthan gum powder according to the weight ratio of 1: 1;
the mass of the water is 35% of the total weight of the raw materials.
Further, the fineness of the calcium carbonate powder is 400-600 meshes, and CaCO in the calcium carbonate powder3The content is more than or equal to 95 percent.
Furthermore, the fineness of the metal zirconium powder is 180-260 meshes, and the Zr content in the metal zirconium powder is more than or equal to 65%.
Furthermore, the fineness of the silicon carbide powder is 180-300 meshes, and the SiC content in the silicon carbide powder is more than or equal to 92%.
Further, the dispersing agent is one or more of carbon black, graphite and petroleum coke powder, and the fineness of the dispersing agent is 180-300 meshes.
Furthermore, the fineness of the starch is 180-280 meshes, and the fineness of the xanthan powder is 200-260 meshes.
The preparation method of the calcareous anti-sticking slag spray coating comprises the following steps: a. weighing the raw materials in proportion; b. adding the raw materials into a stirrer, uniformly mixing and stirring, and c, adding water, mixing and stirring.
When the calcium slag-sticking-resistant spray paint is used, the calcium slag-sticking-resistant spray paint is directly sprayed at the position of a converter mouth, the spraying time is 1-3 min each time, the thickness is 1-3 mm, the first two times are fixed and are sprayed once for every 3 furnaces, the spraying of the third furnace can be normally carried out for 6-10 furnaces, and steel can be immediately produced after the spraying of each time is finished.
Compared with the prior art, the invention has the following beneficial effects:
the calcium carbonate powder is used as a main raw material, the carbon black, the graphite and the petroleum coke powder are used as dispersing agents, and the calcium is combined with the dispersing agents to jointly play a role in separating the spray coating from the slag adhered to the converter mouth, so that the adhered slag is not easy to hang on the converter mouth; starch and xanthan gum powder are used as thickening agents, are not easy to precipitate within 6 hours, and prevent a spray gun pipe from being blocked; the high-temperature stability of the metal zirconium powder and the silicon carbide powder can play roles of erosion resistance, scouring resistance, oxidation resistance and high-temperature resistance, and the spray paint is prevented from deforming and sagging at high temperature. The calcareous slag-sticking-preventing spray coating disclosed by the invention is simple in formula and convenient to prepare, steel is sprayed once every 3 furnaces, the spraying time is 1-3 min every time, the thickness is 1-3 mm, the spraying can be carried out once in 6-10 furnaces after continuous spraying is carried out twice, the slag-sticking-preventing effect is good, the slag-striking only needs 8-12 min, the slag-striking time is saved, the steel-making time is increased, and the economic benefit is higher.
Detailed Description
As further described below with respect to specific embodiments of the present invention, the starting materials for use in the present invention are commercially available, and unless otherwise specified, the procedures in the examples below are conventional in the art.
The specifications of the raw materials used in the following examples are as follows:
calcium carbonate powder: fineness of 400-600 meshes and CaCO3The content is more than or equal to 95 percent;
metal zirconium powder: the fineness is 180-260 meshes, and the Zr content is more than or equal to 65%;
silicon carbide powder: the fineness is 180-300 meshes, and the SiC content is more than or equal to 92%;
carbon black, graphite and petroleum coke powder: the fineness is 180-300 meshes;
starch: the fineness is 180-280 meshes;
xanthan powder: the fineness is 200-260 meshes.
Example 1
A calcareous slag-sticking-preventing spray coating for a converter mouth is prepared from the following raw materials: 8.5kg of calcium carbonate powder, 0.5kg of metal zirconium powder, 0.3kg of silicon carbide powder, 0.2kg of carbon black, 0.1kg of graphite, 0.2kg of starch and 0.2kg of xanthan powder; and 3.5kg of water was added.
Example 2
A calcareous slag-sticking-preventing spray coating for a converter mouth is prepared from the following raw materials: 9kg of calcium carbonate powder, 0.3kg of metal zirconium powder, 0.2kg of silicon carbide powder, 0.2kg of petroleum coke powder, 0.2kg of starch and 0.1kg of xanthan powder; and 3kg of water was added.
Example 3
A calcareous slag-sticking-preventing spray coating for a converter mouth is prepared from the following raw materials: 8.8kg of calcium carbonate powder, 0.3kg of metal zirconium powder, 0.5kg of silicon carbide powder, 0.1kg of carbon black, 0.1kg of starch and 0.1kg of xanthan powder; and 3.5kg of water was added.
Example 4
A calcareous slag-sticking-preventing spray coating for a converter mouth is prepared from the following raw materials: 8.7kg of calcium carbonate powder, 0.2kg of metal zirconium powder, 0.5kg of silicon carbide powder, 0.2kg of graphite, 0.1kg of petroleum coke powder, 0.15kg of starch and 0.15kg of xanthan powder; and 4kg of water was added.
The preparation method of the calcareous anti-sticking slag spray coating for the converter mouth comprises the following steps: a. weighing the raw materials; b. adding the raw materials into a stirrer, uniformly mixing and stirring, and c, adding water, mixing and stirring.
Comparative example 1
Example 2 of patent document No. CN107235733A discloses an anti-slag spray coating, which is composed of the following raw materials: 1kg of bauxite particles with the fineness of 0-1 mm, 2.4kg of bauxite powder with the fineness of 325-800 meshes, 1.6kg of silicon powder with the fineness of 280-325 meshes, 4kg of silicon powder with the fineness of 600-1000 meshes, 0.18kg of metal silicon powder with the fineness of 180-260 meshes, 0.05kg of zirconium oxide with the fineness of 325-400 meshes, 0.5kg of silicon carbide with the fineness of 180-280 meshes, 0.2kg of silicon micropowder, 0.04kg of sodium tripolyphosphate, 0.03kg of sodium hexametaphosphate and 4kg of water.
Comparative example 2
Example 1 of patent document No. CN1429677A discloses an anti-slag spray coating, which is composed of the following raw materials: 6kg of limestone with the fineness of 2-0.088 mm, 2.6kg of limestone with the fineness of less than 0.088mm, 0.6kg of slaked lime and SiO20.25kg of micro powder, 0.2kg of sodium tripolyphosphate, 0.35kg of water glass, 0.02kg of paper fiber and 3kg of water.
The slag adhesion preventing spray coatings prepared in comparative examples 1-2 and examples 1-4 were sprayed to the converter mouth, and the blank group was not sprayed with the slag adhesion preventing spray coating. The slag adhesion preventing spray paint prepared by the invention is fixed to be sprayed once for every 3 furnaces of steel smelting during two times of spraying, so that the data of the number of furnaces without slag adhering in the following tables in the examples 1-4 are data after the third spraying, and the spraying process and the effect are shown in the table 1.
TABLE 1 comparison of the application and effect of the coating
As can be seen from the above table, the converter mouth without the anti-sticking slag must stick slag, and the slag striking time is longer, which is 40 min; in the comparative example 1, bauxite is used as a main raw material, the reaction time is long, the steel making can be continued after 45min of drying time is needed, and the number of furnaces without slag adhering is maintained to be 2; the slag adhesion preventing spray paint prepared in comparative example 2 and examples 1 to 4 can be used immediately after being sprayed, but the slag adhesion preventing spray paint prepared in comparative example 2 has a spraying thickness about 10 times that of the present invention compared with examples 1 to 4 of the present invention, and the amount of remaining slag is 1 to 5 times less than that of the present invention. Therefore, the calcium anti-sticking slag spray coating for the converter mouth prepared by the invention has the advantages of convenient use and good anti-sticking slag effect.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. The calcareous slag-sticking-preventing spray coating for the converter mouth is characterized by being prepared by adding water into the following raw materials in percentage by weight: 85-90% of calcium carbonate powder, 2-5% of metal zirconium powder, 2-5% of silicon carbide powder, 1-3% of dispersing agent and 2-4% of thickening agent;
the dispersing agent is one or more of carbon black, graphite and petroleum coke powder, and the fineness of the dispersing agent is 180-300 meshes;
the thickening agent is formed by mixing starch and xanthan gum powder according to the weight ratio of 1-2: 1-2;
the mass of the water is 30-40% of the total weight of the raw materials;
when the calcium slag-sticking-resistant spray paint is used, the calcium slag-sticking-resistant spray paint is directly sprayed at the position of a converter mouth, the spraying time is 1-3 min each time, the thickness is 1-3 mm, the first two times are fixed and are sprayed once for every 3 furnaces of steel, the spraying time for the third time is 6-10 furnaces of steel making, and steel making can be immediately carried out after the spraying is finished each time.
2. The calcareous slag adhesion preventing spray coating for the converter mouth according to claim 1 is characterized by being prepared by adding water into the following raw materials in percentage by weight: 88% of calcium carbonate powder, 3% of metal zirconium powder, 4% of silicon carbide powder, 2% of dispersing agent and 3% of thickening agent;
the thickening agent is formed by mixing starch and xanthan gum powder according to the weight ratio of 1: 1;
the mass of the water is 35% of the total weight of the raw materials.
3. The calcareous slag adhesion preventing spray coating for the converter mouth according to claim 1 or 2, characterized in that the fineness of the calcium carbonate powder is 400-600 meshes, and CaCO in the calcium carbonate powder3The content is more than or equal to 95 percent.
4. The calcareous anti-sticking slag spray coating for the converter mouth according to claim 1 or 2, characterized in that the fineness of the metal zirconium powder is 180-260 meshes, and the Zr content in the metal zirconium powder is more than or equal to 65%.
5. The calcareous anti-sticking slag spray coating for the converter mouth according to claim 1 or 2, characterized in that the fineness of the silicon carbide powder is 180-300 meshes, and the SiC content in the silicon carbide powder is more than or equal to 92%.
6. The calcareous anti-sticking slag spray coating for the converter mouth according to claim 1 or 2, characterized in that the fineness of the starch is 180-280 meshes, and the fineness of the xanthan powder is 200-260 meshes.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910439326.7A CN110066143A (en) | 2019-05-24 | 2019-05-24 | A kind of calcareous slag adhesion spray paint for converter mouth |
| CN2019104393267 | 2019-05-24 |
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| Publication Number | Publication Date |
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| CN110255980A CN110255980A (en) | 2019-09-20 |
| CN110255980B true CN110255980B (en) | 2021-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910439326.7A Pending CN110066143A (en) | 2019-05-24 | 2019-05-24 | A kind of calcareous slag adhesion spray paint for converter mouth |
| CN201910699240.8A Active CN110255980B (en) | 2019-05-24 | 2019-07-31 | Calcareous anti-sticking slag spray coating for converter mouth |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910439326.7A Pending CN110066143A (en) | 2019-05-24 | 2019-05-24 | A kind of calcareous slag adhesion spray paint for converter mouth |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1068282A (en) * | 1991-07-05 | 1993-01-27 | 张景禄 | High-temp paint preventing steel and slag adhesion |
| CN102277020A (en) * | 2011-07-15 | 2011-12-14 | 内蒙古包钢钢联股份有限公司 | Spraying material for pneumatic slag skimming equipment of converter |
| CN107235733A (en) * | 2017-05-27 | 2017-10-10 | 巩义市金利炉料厂 | A kind of slag adhesion spray paint |
-
2019
- 2019-05-24 CN CN201910439326.7A patent/CN110066143A/en active Pending
- 2019-07-31 CN CN201910699240.8A patent/CN110255980B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1068282A (en) * | 1991-07-05 | 1993-01-27 | 张景禄 | High-temp paint preventing steel and slag adhesion |
| CN102277020A (en) * | 2011-07-15 | 2011-12-14 | 内蒙古包钢钢联股份有限公司 | Spraying material for pneumatic slag skimming equipment of converter |
| CN107235733A (en) * | 2017-05-27 | 2017-10-10 | 巩义市金利炉料厂 | A kind of slag adhesion spray paint |
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| Publication number | Publication date |
|---|---|
| CN110255980A (en) | 2019-09-20 |
| CN110066143A (en) | 2019-07-30 |
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