CN114226703A - Variety steel drainage agent and preparation method thereof - Google Patents
Variety steel drainage agent and preparation method thereof Download PDFInfo
- Publication number
- CN114226703A CN114226703A CN202111578540.4A CN202111578540A CN114226703A CN 114226703 A CN114226703 A CN 114226703A CN 202111578540 A CN202111578540 A CN 202111578540A CN 114226703 A CN114226703 A CN 114226703A
- Authority
- CN
- China
- Prior art keywords
- drainage agent
- waste
- percent
- brick powder
- parts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/14—Closures
- B22D41/44—Consumable closure means, i.e. closure means being used only once
- B22D41/48—Meltable closures
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
The invention provides a variety steel drainage agent and a preparation method thereof, and belongs to the technical field of consumable cut-off equipment. A variety steel drainage agent is prepared from the following raw materials in parts by weight: 30-70 parts of waste magnesia carbon brick powder, 10-40 parts of waste silicon carbide brick powder, 0-30 parts of quartz powder, 1-8 parts of carbonaceous material and 2-8 parts of adhesive. According to the invention, by matching the technical scheme with a specific preparation process, the produced variety steel drainage agent is high-temperature resistant, stable in performance and good in fluidity; the waste materials are recycled, the manufacturing cost is low, the energy is saved, the environment is protected, and the phenomenon of grain size component segregation is avoided; the self-opening rate can be stabilized above 99.8% basically when in use.
Description
Technical Field
The invention belongs to the technical field of consumable cut-off equipment, and particularly relates to a variety steel drainage agent and a preparation method thereof.
Background
The ladle drainage agent is an unshaped refractory material with high temperature resistance, stable high-temperature performance and molten steel erosion resistance. Conventionally, the bulk refractory material is prepared by combining and matching a plurality of natural particle materials, mechanically stirring uniformly, drying and filling the mixture into a water gap at the bottom of a steel ladle. The steel ladle is added before receiving molten steel, so that the molten steel is prevented from entering a water inlet. And the steel ladle slide plate has stable performance at high temperature, is not integrally sintered, quickly falls down along with the opening of the steel ladle slide plate during steel casting, plays a role in guiding steel flow, and is an important link for smoothly carrying out high-speed continuous casting at present.
At present, with the transformation and upgrading of products of iron and steel enterprises, particularly the production of variety steelThe product is used for preventing secondary oxidation of molten steel, the requirement on the self-opening rate of a drainage agent is gradually improved, the requirement on the self-opening rate of most manufacturers reaches 100%, and the drainage phenomenon is avoided in the production process. Aiming at the smelting requirements of the steel industry, manufacturers of downstream steelmaking auxiliary materials are also rapidly promoted along with customers. When the scheme of the drainage agent product is designed, the use environment of a demander is combined, optimization is performed from various aspects of material selection, pretreatment, particle size matching, component optimization and the like according to the high-temperature characteristics of various materials, and the satisfaction of the use effect of a client is sought. The early-stage field use proves that most of the drainage agent products used in the current market can meet the use requirements under the working condition of short refining time of conventional steel grades. The steel with high alloy components and long smelting period has the phenomena of unstable self-opening rate, good time and bad time, the continuous stability is difficult to ensure, and the production cost is high and the goal of high quality and low price advocated by the current customers for survival is difficult to achieve. The two will are difficult to match, and the main conflicts are as follows: 1. because the alloy content in the molten steel of the variety steel products is high and the quantity is mixed, the smelting process is complex, the treatment time is long, and the conventional cheap silicon, aluminum, magnesium and other drainage agents are unstable due to high temperature performance and are difficult to meet the self-opening requirement. 2. The chromium drainage agent is better than the common drainage agent in the aspect of self-opening rate, but the purity of molten steel is reduced because the chromium ore sand component is unfavorable for partial steel components, and the chromium sand has higher heat conductivity coefficient and is easy to sinter at low temperature, so that the drainage phenomenon is caused because the fluidity of the drainage agent is poor at high temperature. 3. The chromium-silicon drainage agent can relieve the defect of poor fluidity according to reasonable collocation, but segregation phenomenon is easy to occur in the production and transportation process due to the difference of material property, specific gravity and particle size, and finally self-opening instability is still caused, and continuous drainage phenomenon occasionally occurs, so that the chromium-silicon drainage agent is extremely unfavorable for production of steel varieties. 4. The zirconium drainage agent can solve the self-opening problem, but the cost is too high due to the fact that the source of goods is extremely deficient, most customers cannot accept the zirconium drainage agent, and ZrO cannot be used as the zirconium drainage agent2The components have unfavorable inclusion on part of steel species, so that the steel cannot be used.
Therefore, the problems that the conventional drainage agent has unstable high-temperature performance, poor molten steel permeability resistance and poor fluidity, the chromium content of the chromium drainage agent is high, the polluted molten steel has large self-opening fluctuation with granularity segregation, the zirconium drainage agent introduces impurities into part of the molten steel, the cost is high, and the like, and a client is difficult to accept the impurities are urgently solved.
Disclosure of Invention
In view of the above, the invention provides a drainage agent for a variety steel, so as to overcome the defects of unstable self-opening rate, high cost, molten steel pollution and the like of the existing drainage agent for the variety steel.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a variety steel drainage agent is prepared from the following raw materials in parts by weight: 30-70 parts of waste magnesia carbon brick powder, 10-40 parts of waste silicon carbide brick powder, 0-30 parts of quartz powder, 1-8 parts of carbonaceous material and 2-8 parts of adhesive.
Preferably, the waste magnesia carbon brick powder is obtained by grinding, sieving and deironing waste magnesia carbon bricks, the granularity is-150 meshes and is more than 97 percent, and the waste magnesia carbon brick powder is Fe2O3The content of (B) is less than 1.0 percent by weight;
the weight percentage content of MgO in the waste magnesia carbon brick powder is more than 70 percent; the content of C is more than 15 percent by weight.
Preferably, the waste silicon carbide brick powder is obtained by grinding, sieving and removing iron from waste silicon carbide bricks, the granularity is-150 meshes and is more than 97 percent, and the sum of the weight percentage of free C, Fe and Si is less than 2.0 percent;
the weight percentage content of SiC in the waste silicon carbide brick powder is more than 80 percent.
Preferably, the carbonaceous material is crystalline flake graphite, the content of C in percentage by weight is more than 90%, and the granularity is-200 meshes and is more than 97%.
Preferably, the binder is spent sulfite pulp liquor having a pH greater than 4.0.
Preferably, the variety steel drainage agent comprises the following effective components in percentage by mass: 20-50%, SiC: 8-35% of SiO2：0-30％、C：0.5-7.5％。
Preferably, in the variety steel drainage agent, SiO2The weight percentages are as follows: 0.01-30 percent.
Preferably, the preparation method of the variety steel drainage agent comprises the following steps:
the first step is as follows: respectively conveying the waste magnesia carbon brick powder, the waste silicon carbide brick powder, the quartz powder and the carbonaceous material which meet the requirements to a specified charging bucket by utilizing a conveying device;
the second step is that: adding the adhesive into a designated charging bucket;
the third step: respectively taking the quartz powder, the waste magnesia carbon brick powder and the waste silicon carbide brick powder according to the weight ratio, putting the quartz powder, the waste magnesia carbon brick powder and the waste silicon carbide brick powder into a granulating disc after being measured by a microcomputer, adding an adhesive to stir and mix the materials, generating small particles after the disc rotates and rolls for a plurality of minutes, continuously rotating and rolling for 10-15 minutes, adding a carbonaceous material to adhere to the surfaces of the particles, and continuously rotating and rolling for 5 minutes and then placing the particles on a plate;
the fourth step: screening the granular materials prepared in the third step, and conveying the granular materials into a material storage tank through a conveying device;
the fifth step: conveying the screened particulate material obtained in the fourth step into a roller dryer through a conveying device for drying, and ensuring that the moisture content is controlled within 0.1%;
and a sixth step: and cooling the dried product by using a roller, and then conveying the product into a storage bin for packaging, metering and warehousing through a conveying device.
Preferably, the particle size sieved in said fourth step is 0.3-1.5mm > 96%, wherein 0.3-0.6mm > 40%, 0.6-1.0mm > 40%, 1.0-1.2mm > 15%.
Preferably, the drying temperature in the fifth step is controlled at 650 +/-20 ℃, the exhaust temperature is controlled at 150 +/-20 ℃, the drying flow is controlled at 2.5-3.5 tons per hour, and the rotating speed of the roller is 25-35 r/min.
The drainage agent disclosed by the invention is fully combined with the defects of the conventional product in the variety steel smelting process in the development process, and finally, cheap waste magnesia carbon bricks and waste silicon carbide bricks are selected as main components through a large number of sintering tests on materials and granulation according to the influence of molten steel on the drainage agent product in a high-temperature state, and the drainage agent is obtained by utilizing a scientific and reasonable production and manufacturing process. The on-site batch trial verifies that the pollution of the drainage agent to the molten steel is eliminated, the stable improvement of the continuous casting self-opening rate is ensured, the market demand of customers is met, the waste recycling is achieved by utilizing material conversion, the waste is changed into valuable, the production cost is reduced, the use criteria of high quality and low price of the customers are met, and the clean production and the development and production of high-purity variety steel are facilitated.
According to the invention, by matching the technical scheme with a specific preparation process, the produced variety steel drainage agent is high-temperature resistant, stable in performance and good in fluidity; the waste materials are recycled, the manufacturing cost is low, the energy is saved, the environment is protected, and the phenomenon of grain size component segregation is avoided; the self-opening rate can be stabilized above 99.8% in use, which is specifically explained from the following aspects:
1. raw material selection and matching:
firstly, the invention selects the waste magnesia carbon bricks and the waste silicon carbide bricks as main raw materials, prepares a proper amount of phosphorus flake graphite, and fully utilizes the characteristics of the magnesia carbon bricks and the silicon carbide bricks, such as high refractoriness, stable high-temperature performance, molten steel erosion resistance, difficult wetting, belonging to alkaline substances, not eroding a lining, adsorbing molten steel inclusions, not introducing any impurity and the like. The waste magnesia carbon bricks and the waste silicon carbide bricks are used for replacing high-price zircon sand and chrome ore sand to play a beneficial role in the self-opening aspect of the drainage agent, the self-opening rate is improved, meanwhile, the environmental pollution of waste materials is reduced, and the environmental protection aims of clean production and changing waste into valuable are really realized; on the premise of ensuring the use effect, the production cost is greatly reduced, and the production requirements of high quality and low price of the steel enterprises are met.
Secondly, cheap waste magnesia carbon bricks and waste silicon carbide bricks are scientifically selected to replace zircon sand and chrome ore sand, so that the problems of the zirconium drainage agent and the chrome drainage agent in the using process are obviously relieved, and zirconium oxide inclusions brought by the zirconium drainage agent to certain types of steel are solved; also solves the problem that the chromium drainage agent is the Cr of the main material2O3Cr formed by reaction with alkali metals at high temperatures3+The pollution to air and the pollution to partial molten steel.
Thirdly, through scientific and reasonable substitution and collocation of the raw materials and matching improvement of the granulation process, the prepared drainage agent has good fluidity, the repose angle of the product is in a controllable range, and the phenomena of poor fluidity and frequent eye burning of the chromium drainage agent caused by shrinkage sintering of the chromium ore at low temperature are avoided. Meanwhile, the product prepared by grinding, granulating and drying the material has the advantages of stable content of each component, moderate refractoriness, controllable thickness of a sintering layer and reasonable granularity grading, overcomes the problem of granularity component segregation caused by the difference of material granularity and specific gravity in the transportation and transfer processes of the original natural granular product, and ensures that the product can be continuously and stably used.
2. Particle size matching: the invention changes the original production process, the product prepared by the grinding, granulating and screening processes has reasonable granularity grading, and can be regulated and controlled according to the field use condition. The method is controlled in advance in the aspect of preventing molten steel from permeating, and meanwhile, the drainage agent product is small in repose angle, large in fillet coefficient and good in fluidity, so that the improvement of the self-opening rate is guaranteed.
3. The drainage agent selects the magnesia carbon bricks and the silicon carbide bricks as main materials, the magnesia carbon bricks and the silicon carbide bricks meet the use requirements through grinding and iron removal processes, and the drainage agent has more stable performance in the self-development use of variety steel through reasonable matching with quartz powder, crystalline flake graphite and an adhesive. The refractoriness of the drainage agent can be realized by adjusting the components and the content thereof according to the actual situation on site; containing no ZrO2And Cr2O3Containing a trace amount of Fe2O3The method can eliminate the environmental pollution and the molten steel pollution caused by the drainage agent in use, meet the requirement of improving the casting rate of variety steel, and solve the problem that the molten steel is polluted by the carried impurities brought by the drainage agent. According to the invention, through the manufacturing process of granulating by a disc and then coating carbon, the phosphorus flake graphite can be fully coated on the surface of the particles, so that the isolation and lubrication effects are achieved, no dust is generated in the using process, and the effects of energy conservation, environmental protection, quality improvement and efficiency improvement are achieved.
4. Compared with the existing similar drainage agent, the drainage agent for the variety steel can effectively improve the casting rate of products, has more stable self-opening rate, can achieve the self-opening effect of 99.8 percent, meets the use requirements of the variety steel except ultra-low carbon steel, meets the production requirements of the existing clean steel, changes waste into valuable, reduces environmental pollution, effectively reduces the production cost, reduces the emission of dust and harmful gas, reduces the potential safety hazard, achieves the purposes of high quality, energy conservation and environmental protection, and meets the comprehensive use requirements of the existing steel enterprises on quality, environmental protection, safety and cost.
Detailed Description
In order to better understand the present invention, the following examples are further provided to clearly illustrate the contents of the present invention, but the contents of the present invention are not limited to the following examples. In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details.
The starting materials used in the following examples are all commercially available unless otherwise specified.
Carbonaceous material: flake graphite is adopted, the weight percentage content of C is more than 90%, and the granularity is-200 meshes and is more than 97%;
adhesive: the sulfite pulp waste liquor is adopted, and the pH value is more than 4.
Example 1
Taking waste magnesia carbon brick powder and waste silicon carbide brick powder which are subjected to grinding and iron removal treatment, quartz powder, a carbonaceous material and an adhesive according to the table 1; after accurate measurement, adding the waste magnesia carbon brick powder and the waste silicon carbide brick powder into a granulating disc, adding an adhesive, rotating and stirring for 15 minutes, adding a carbonaceous material, continuously rotating and rolling for 5 minutes, conveying to a screening device, screening the material, and then conveying into a material storage tank, wherein the screened granularity is 0.3-1.5mm which is more than 96 percent, wherein 0.3-0.6mm which is more than 40 percent, 0.6-1.0mm which is more than 40 percent, and 1.0-1.2mm which is more than 15 percent; then conveying the mixture into a drying system for drying, wherein the drying temperature is 650 ℃, the exhaust temperature is 150 ℃, the drying flow is controlled to be 3 tons per hour, the rotating speed of a roller is 30r/min, and the moisture is ensured to be within 0.1%; cooling by a cooling roller, packaging and warehousing.
Example 2
Taking waste magnesia carbon brick powder and waste silicon carbide brick powder which are subjected to grinding and iron removal treatment, quartz powder, a carbonaceous material and an adhesive according to the table 1; after accurate measurement, adding the waste magnesia carbon brick powder and the waste silicon carbide brick powder into a granulating disc, adding an adhesive, rotating and stirring for 10 minutes, adding a carbonaceous material, continuously rotating and rolling for 5 minutes, conveying to a screening device, screening the material, and then conveying into a material storage tank, wherein the screened granularity is 0.3-1.5mm which is more than 96 percent, wherein 0.3-0.6mm which is more than 40 percent, 0.6-1.0mm which is more than 40 percent, and 1.0-1.2mm which is more than 15 percent; then conveying the mixture into a drying system for drying, wherein the drying temperature is 630 ℃, the exhaust temperature is 120 ℃, the drying flow is controlled to be 2.5 tons per hour, the rotating speed of a roller is 25r/min, and the moisture is ensured to be within 0.1%; cooling by a cooling roller, packaging and warehousing.
Example 3
Taking waste magnesia carbon brick powder and waste silicon carbide brick powder which are subjected to grinding and iron removal treatment, quartz powder, a carbonaceous material and an adhesive according to the table 1; after accurate measurement, adding the waste magnesia carbon brick powder and the waste silicon carbide brick powder into a granulating disc, adding an adhesive, rotating and stirring for 12 minutes, adding a carbonaceous material, continuously rotating and rolling for 5 minutes, conveying to a screening device, screening the material, and then conveying into a material storage tank, wherein the screened granularity is 0.3-1.5mm which is more than 96 percent, wherein 0.3-0.6mm which is more than 40 percent, 0.6-1.0mm which is more than 40 percent, and 1.0-1.2mm which is more than 15 percent; then conveying the mixture into a drying system for drying, wherein the drying temperature is 670 ℃, the exhaust temperature is 170 ℃, the drying flow is controlled at 3 tons per hour, the rotating speed of a roller is 30r/min, and the moisture is ensured to be within 0.1%; cooling by a cooling roller, packaging and warehousing.
Example 4
Taking waste magnesia carbon brick powder and waste silicon carbide brick powder which are subjected to grinding and iron removal treatment, quartz powder, a carbonaceous material and an adhesive according to the table 1; after accurate measurement, adding the waste magnesia carbon brick powder and the waste silicon carbide brick powder into a granulating disc, adding an adhesive, rotating and stirring for 13 minutes, adding a carbonaceous material, continuously rotating and rolling for 5 minutes, conveying to a screening device, screening the material, and then conveying into a material storage tank, wherein the screened granularity is 0.3-1.5mm which is more than 96 percent, wherein 0.3-0.6mm which is more than 40 percent, 0.6-1.0mm which is more than 40 percent, and 1.0-1.2mm which is more than 15 percent; then conveying the mixture into a drying system for drying, wherein the drying temperature is 660 ℃, the exhaust temperature is 160 ℃, the drying flow is controlled to be 3.5 tons per hour, the rotating speed of a roller is 35r/min, and the moisture is ensured to be within 0.1%; cooling by a cooling roller, packaging and warehousing.
Example 5
Taking waste magnesia carbon brick powder and waste silicon carbide brick powder which are subjected to grinding and iron removal treatment, quartz powder, a carbonaceous material and an adhesive according to the table 1; after accurate measurement, adding the waste magnesia carbon brick powder and the waste silicon carbide brick powder into a granulating tray, adding an adhesive, rotating and stirring for 14 minutes, adding a carbonaceous material, continuously rotating and rolling for 5 minutes, conveying to a screening device, screening the material, and then conveying into a material storage tank, wherein the screened granularity is 0.3-1.5mm which is more than 96 percent, wherein 0.3-0.6mm which is more than 40 percent, 0.6-1.0mm which is more than 40 percent, and 1.0-1.2mm which is more than 15 percent; then conveying the mixture into a drying system for drying, wherein the drying temperature is 665 ℃, the exhaust temperature is 155 ℃, the drying flow is controlled to be 3 tons per hour, the rotating speed of a roller is 30r/min, and the moisture is ensured to be within 0.1%; cooling by a cooling roller, packaging and warehousing.
The raw material compositions of examples 6 to 9 were measured as in table 1, and the preparation methods were referred to example 1 and will not be described again.
The compositions of the drainage agents of examples 1 to 9 are shown in Table 1.
TABLE 1 raw material compositions of examples 1 to 9 in parts by weight
The drainage agent for the steel of the variety comprises the following effective components in percentage by mass: 20-50%, SiC: 8-35% of SiO2：0-30％、C：0.5-7.5％。
In some embodiments of the invention, the variety of steel drainage agent is SiO2The weight percentages are as follows: 0.01-30 percent.
The compositions of the effective chemical components of the drainage agents of the above examples 1 to 9 are shown in Table 2.
Table 2 effective chemical composition of examples 1-9 in weight percent
| Parts by weight | MgO | SiC | SiO2 | C | Fe2O3 |
| Example 1 | 30.1 | 30.75 | 29.6 | 4.6 | 0.57 |
| Example 2 | 37.5 | 20.75 | 20.58 | 3.68 | 0.68 |
| Example 3 | 41.28 | 24.8 | 9.92 | 4.57 | 0.90 |
| Example 4 | 45.3 | 16.5 | 13.98 | 5.46 | 0.97 |
| Example 5 | 48.75 | 18.2 | 7.86 | 4.58 | 1.04 |
| Example 6 | 22.6 | 32.6 | 19.9 | 7.31 | 0.37 |
| Example 7 | 49.2 | 8.1 | 17.3 | 0.91 | 0.43 |
| Example 8 | 43.5 | 28.3 | 0 | 2.68 | 0.51 |
| Example 9 | 47.8 | 20.9 | 0 | 5.47 | 0.63 |
Comparative example 1
The starting materials shown in table 3 are provided and the preparation process is referred to example 1.
Comparative example 2
The starting materials shown in table 3 are provided and the preparation process is referred to example 3.
Comparative example 3
The starting materials shown in table 3 are provided and the preparation process is referred to example 2.
Comparative example 4
The starting materials shown in table 3 are provided and the preparation process is referred to example 4.
Comparative example 5
The starting materials shown in table 3 are provided and the preparation process is referred to example 5.
Comparative example 6
This comparative example differs from example 1 in that: the screened granularity is 0.3-1.5mm > 96%, wherein 0.3-0.6mm > 60%, 0.6-1.0mm > 25%, 1.0-1.2mm > 10%.
Comparative example 7
This comparative example differs from example 1 in that: selecting waste magnesia carbon brick powder and waste silicon carbide brick powder without iron removal, wherein Fe in the waste magnesia carbon brick powder2O39 percent of the waste silicon carbide brick powder, and Fe in the waste silicon carbide brick powder2O3Is 3.5 percent.
The raw material compositions of the drainage agents of comparative examples 1 to 7 described above are shown in Table 3.
TABLE 3 raw material compositions of comparative examples 1 to 7 in parts by weight
The compositions of the effective chemical components of the drainage agents of the above comparative examples 1 to 7 are shown in Table 4.
TABLE 4 effective chemical composition of comparative examples 1 to 7 in weight percent
| Weight percent of | MgO | SiC | SiO2 | C | Fe2O3 |
| Comparative example 1 | 14.6 | 36.3 | 27.2 | 4.56 | 0.49 |
| Comparative example 2 | 57 | 4.1 | 18.9 | 3.61 | 0.37 |
| Comparative example 3 | 0 | 40.5 | 41.2 | 4.37 | 0.21 |
| Comparative example 4 | 49.2 | 0 | 21.8 | 5.4 | 0.35 |
| Comparative example 5 | 21.3 | 22.94 | 36.7 | 1.82 | 0.31 |
| Comparative example 6 | 28.2 | 20.3 | 27.5 | 4.69 | 0.43 |
| Comparative example 7 | 25.1 | 18.7 | 27.3 | 4.61 | 4.3 |
Application example:
the drainage agents prepared in examples 1 to 5 and comparative examples 1 to 7 were tried, and the statistical results are shown in table 5.
TABLE 5 statistics of the results of the applications of examples 1-5 and comparative examples 1-7
| Application example | Variety steel grade | Waiting time for steel/min | Self opening rate/%) |
| Example 1 | 40Mn2 | 200-240 | 99.8 |
| Example 2 | 48MnV | 180-210 | 99.8 |
| Example 3 | QC10 bearing steel | 200-240 | 99.9 |
| Example 4 | H13 | 180-210 | 100 |
| Example 5 | Hi-B | 180-210 | 99.8 |
| Comparative example 1 | 40Mn2 | 200-240 | 98.2 |
| Comparative example 2 | QC10 bearing steel | 200-240 | 96.3 |
| Comparative example 3 | 48MnV | 180-210 | 97.0 |
| Comparative example 4 | H13 | 180-210 | 95.5 |
| Comparative example 5 | Hi-B | 180-210 | 97.7 |
| Comparative example 6 | 40Mn2 | 200-240 | 99.2 |
| Comparative example 7 | 40Mn2 | 200-240 | 90.3 |
According to the data, the drainage agent provided by the invention takes cheap waste magnesia carbon brick powder and waste silicon carbide brick powder as main raw materials, and through scientific collocation and optimization, the self-opening rate of the obtained drainage agent applied to various steels is not lower than 99.8%, and the self-opening effect stability of the drainage agent applied to different types of steels is good.
The chemical component tests of the steel varieties applied in the embodiments 1 to 5 are respectively carried out before and after drainage, the test results show that the steel varieties have no chromium increase or zirconium increase phenomena before and after drainage, and the chromium or zirconium content in the steel varieties accords with the control standard of the corresponding steel varieties, which shows that the drainage agent can not cause molten steel pollution to the steel varieties and can meet the requirements of clean production of different steel varieties.
Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and other modifications or equivalent substitutions made by the technical solutions of the present invention by those of ordinary skill in the art should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. The variety steel drainage agent is characterized in that: the feed is prepared from the following raw materials in parts by weight: 30-70 parts of waste magnesia carbon brick powder, 10-40 parts of waste silicon carbide brick powder, 0-30 parts of quartz powder, 1-8 parts of carbonaceous material and 2-8 parts of adhesive.
2. The grade steel drainage agent of claim 1, wherein: the waste magnesia carbon brick powder is obtained by grinding, sieving and deironing waste magnesia carbon bricks, the granularity is-150 meshes and is more than 97 percent, and Fe2O3The content of (B) is less than 1.0 percent by weight;
preferably, the weight percentage content of MgO in the waste magnesia carbon brick powder is more than 70%; the content of C is more than 15 percent by weight.
3. The grade steel drainage agent of claim 1, wherein: the waste silicon carbide brick powder is obtained by grinding, sieving and removing iron from waste silicon carbide bricks, the granularity is-150 meshes and is more than 97 percent, and the sum of the weight percentage of free C, Fe and Si is less than 2.0 percent;
preferably, the weight percentage content of SiC in the waste silicon carbide brick powder is more than 80%.
4. The grade steel drainage agent of claim 1, wherein: the carbonaceous material is crystalline flake graphite, the weight percentage content of C is more than 90%, and the granularity is-200 meshes and is more than 97%.
5. The grade steel drainage agent of claim 1, wherein: the adhesive is sulfite pulp waste liquor, and the pH value is more than 4.0.
6. The grade steel drainage agent of any one of claims 1 to 5, wherein: the mass percentage of the active ingredients is MgO: 20-50%, SiC: 8-35% of SiO2：0-30％、C：0.5-7.5％。
7. The grade steel drainage agent of claim 6, wherein: SiO 22The weight percentages are as follows: 0.01-30 percent.
8. The method for preparing the drainage agent for the variety steel according to any one of claims 1 to 7, wherein the drainage agent comprises: the method comprises the following steps:
the first step is as follows: respectively conveying the waste magnesia carbon brick powder, the waste silicon carbide brick powder, the quartz powder and the carbonaceous material which meet the requirements to a specified charging bucket by utilizing a conveying device;
the second step is that: adding the adhesive into a designated charging bucket;
the third step: respectively taking the quartz powder, the waste magnesia carbon brick powder and the waste silicon carbide brick powder according to the weight ratio, putting the quartz powder, the waste magnesia carbon brick powder and the waste silicon carbide brick powder into a granulating disc after being measured by a microcomputer, adding an adhesive to stir and mix the materials, generating small particles after the disc rotates and rolls for a plurality of minutes, continuously rotating and rolling for 10-15 minutes, adding a carbonaceous material to adhere to the surfaces of the particles, and continuously rotating and rolling for 5 minutes and then placing the particles on a plate;
the fourth step: screening the granular materials prepared in the third step, and conveying the granular materials into a material storage tank through a conveying device;
the fifth step: conveying the screened particulate material obtained in the fourth step into a roller dryer through a conveying device for drying, and ensuring that the moisture content is controlled within 0.1%;
and a sixth step: and cooling the dried product by using a roller, and then conveying the product into a storage bin for packaging, metering and warehousing through a conveying device.
9. The method for preparing the drainage agent for the variety steel according to claim 8, wherein the drainage agent comprises: the granularity screened in the fourth step is 0.3-1.5mm which is more than 96 percent, wherein 0.3-0.6mm is more than 40 percent, 0.6-1.0mm is more than 40 percent, and 1.0-1.2mm is more than 15 percent.
10. The method for preparing the drainage agent for the variety steel according to claim 9, wherein the drainage agent comprises: in the fifth step, the drying temperature is controlled at 650 +/-20 ℃, the exhaust temperature is controlled at 150 +/-20 ℃, the drying flow is controlled at 2.5-3.5 tons per hour, and the rotating speed of the roller is 25-35 r/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111578540.4A CN114226703B (en) | 2021-12-22 | 2021-12-22 | Drainage agent for variety steel and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111578540.4A CN114226703B (en) | 2021-12-22 | 2021-12-22 | Drainage agent for variety steel and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114226703A true CN114226703A (en) | 2022-03-25 |
| CN114226703B CN114226703B (en) | 2023-09-19 |
Family
ID=80761048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111578540.4A Active CN114226703B (en) | 2021-12-22 | 2021-12-22 | Drainage agent for variety steel and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114226703B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2804025A1 (en) * | 1977-02-02 | 1978-08-03 | Centre Rech Metallurgique | Continuous casting refractory nozzle mfr. - with addn. of finely divided refractory oxide to improve resistance to chemical attack |
| CN105903918A (en) * | 2016-06-21 | 2016-08-31 | 郑州东升冶金新材料有限公司 | Silicon-carbon drainage agent and preparation method thereof |
| CN106336225A (en) * | 2015-07-10 | 2017-01-18 | 冷水江市高科窑炉耐火材料有限公司 | Production process for stuffing sand |
| CN109133951A (en) * | 2018-09-28 | 2019-01-04 | 河南通宇冶材集团有限公司 | A kind of thermal resistance drainage agent and preparation method thereof |
| CN112479728A (en) * | 2020-12-23 | 2021-03-12 | 河南通宇冶材集团有限公司 | Chromium-free environment-friendly fluxing agent for drainage agent, drainage agent and preparation method |
-
2021
- 2021-12-22 CN CN202111578540.4A patent/CN114226703B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2804025A1 (en) * | 1977-02-02 | 1978-08-03 | Centre Rech Metallurgique | Continuous casting refractory nozzle mfr. - with addn. of finely divided refractory oxide to improve resistance to chemical attack |
| CN106336225A (en) * | 2015-07-10 | 2017-01-18 | 冷水江市高科窑炉耐火材料有限公司 | Production process for stuffing sand |
| CN113387711A (en) * | 2015-07-10 | 2021-09-14 | 冷水江市高科窑炉耐火材料有限公司 | Production process of drainage sand |
| CN105903918A (en) * | 2016-06-21 | 2016-08-31 | 郑州东升冶金新材料有限公司 | Silicon-carbon drainage agent and preparation method thereof |
| CN109133951A (en) * | 2018-09-28 | 2019-01-04 | 河南通宇冶材集团有限公司 | A kind of thermal resistance drainage agent and preparation method thereof |
| CN112479728A (en) * | 2020-12-23 | 2021-03-12 | 河南通宇冶材集团有限公司 | Chromium-free environment-friendly fluxing agent for drainage agent, drainage agent and preparation method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114226703B (en) | 2023-09-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110976797B (en) | Micro-carbon covering slag for medium-high carbon steel of square and rectangular billets and preparation method thereof | |
| CN1212408C (en) | Carburant for steel-making and producing process and method of using thereof | |
| CN105837233B (en) | The special steel ultralow carbonaceous collector nozzle of metal bonding corundum and production technology | |
| CN109202055B (en) | High-quality special steel drainage agent and preparation method thereof | |
| CN104493150B (en) | A kind of alumina-silica drainage agent and preparation method thereof | |
| CN105777159A (en) | Method for producing large-scale copper smelting furnace lining bricks by smelting chromium slag | |
| CN112479728B (en) | Chromium-free environment-friendly fluxing agent for drainage agent, drainage agent and preparation method | |
| CN109232006A (en) | A kind of low-porosity resistant to corrosion acidity Dry vibrating material and preparation method thereof | |
| CN112760444A (en) | Converter modifier regenerated by dry material of used tundish and preparation method thereof | |
| CN114226703A (en) | Variety steel drainage agent and preparation method thereof | |
| CN114105658B (en) | Carbon-free drainage agent and preparation method thereof | |
| CN110629017A (en) | Sintered iron-containing material, sintered composition, sintered ore and method for producing same | |
| CN110002885A (en) | A method of the fused magnesite of zirconium spinel containing magnalium is prepared with electric arc furnaces | |
| CN113234944B (en) | Preparation method of zirconium alloy ingot | |
| CA2850869C (en) | Metallurgical composition for the manufacture of ferrochrome | |
| CN114149268A (en) | Lime brick for ladle slag line and processing technology | |
| CN100494119C (en) | Alumina-silicon carbide-carbon refractory material preparation method | |
| CN114276153A (en) | High-calcium magnesia-calcium brick and preparation method thereof | |
| SA112331003B1 (en) | Process for the manufacture of ferrochrome | |
| CN110634037A (en) | Method for measuring and calculating smelting cost of iron ore powder | |
| CN111004887A (en) | Preparation process of steel ladle heat-insulating agent and steel ladle heat-insulating agent | |
| CN110845247A (en) | Low-cost RH ramming material and preparation method thereof | |
| SU876761A1 (en) | Method of pyrometallurgical processing of zinc cakes | |
| CN114309508B (en) | CaO-BaO-MgO-Al 2 O 3 Quaternary slag system tundish covering agent and its preparation method | |
| CN114888249B (en) | Covering slag for producing medium carbon steel with high pulling speed of sheet billet and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |