CN114606362A - Converter slag washing desulfurization process - Google Patents
Converter slag washing desulfurization process Download PDFInfo
- Publication number
- CN114606362A CN114606362A CN202210262698.9A CN202210262698A CN114606362A CN 114606362 A CN114606362 A CN 114606362A CN 202210262698 A CN202210262698 A CN 202210262698A CN 114606362 A CN114606362 A CN 114606362A
- Authority
- CN
- China
- Prior art keywords
- mass
- solution
- steel
- stirring
- powder
- 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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0006—Adding metallic additives
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/064—Dephosphorising; Desulfurising
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/072—Treatment with gases
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention relates to the technical field of steel making, in particular to a converter slag washing desulfurization process, which can quickly disperse in molten steel and improve the contact with sulfur to remove the sulfur by adding activated ash powder and complex aluminum particles from an observation window aiming at a steel flow stirring area and simultaneously carrying out argon blowing stirring operation. In addition, the invention reduces the granularity by grinding the magnesium hydroxide and the aluminum powder, and then forms a mixture of magnesium oxide and aluminum by pyrolysis, and the mixture is added into the molten steel, thereby not only protecting the furnace body, avoiding the corrosion of the furnace body by the molten steel and improving the smelting efficiency of the steel, but also further removing sulfur, and further reducing the sulfur content in the steel.
Description
Technical Field
The invention relates to the technical field of steel making, in particular to a converter slag washing desulphurization process.
Background
S is a harmful element in plain carbon steel, is combined with Fe in molten steel to generate FeS with the melting point of 1193 ℃, the high content of FeS can cause casting blank segregation and center porosity in the continuous casting and pouring process, the melting point of the eutectic of Fe and FeS is 985 ℃, hot brittleness can be caused during steel hot processing, the welding performance of steel can be obviously reduced, high-temperature cracking can be caused, air holes and porosity can be generated in a metal welding seam, and the strength of the welding seam can be reduced. The S content of the high-grade high-quality steel is less than 0.030 percent, and the S content of the high-quality steel is less than or equal to 0.045 percent. At present, the first molten steel is not put into use with a desulfurization station, the produced steel structure is mainly high-quality plain carbon steel, the proportion of molten iron sulfur is more than 0.040 percent and is about 20 percent, the desulfurization rate of a converter is generally 30 to 40 percent, the molten iron sulfur can be directly fed into the converter by 0.040 to 0.060 percent, the molten iron sulfur is more than 0.060 percent and is folded into a low-sulfur molten iron tank, and the refining furnace is started to desulfurize the molten iron sulfur is more than 0.070 percent. When two blast furnaces are simultaneously high in sulfur, a refining furnace is overhauled when molten iron is high in sulfur, the refining furnace is used for producing steel, molten iron is not high in sulfur, and the like, waste products with high sulfur are not hit, and no effective control measures are provided.
The prior art mainly solves the following problems in the process of steel making and sulfur removal:
1) the molten steel is seriously peroxided: and (3) pouring and tapping three times of reversing the furnace for more than three times of high sulfur, wherein the tapping C is less than 0.05 percent, the oxygen content of molten steel is more than 1000ppm, the residual Mn is less than or equal to 0.05 percent (the Mn in the carbon-drawing furnace is 0.10-0.18 percent), and the total iron content of slag is 25-30 percent. The steel tapping deoxidation alloying operation is difficult, the component miss due to the over-oxygen accounts for about 2 percent, and the alloy recovery rate is reduced by 10 percent.
2) The slag charge consumption is high: when the molten iron has high sulfur, about 55kg of slag is added in the blowing process for ensuring the desulfurization rate, about 15kg of slag is added in the high-sulfur supplementary blowing process, and the operation is difficult to accurately control;
3) the slag splashing furnace protection effect is poor, the furnace lining is seriously eroded, and the consumption of furnace protection refractory materials is high. The high FeO content peroxy slag erodes the slag splashing layer and even the magnesia carbon brick on the working layer, the furnace is eroded by soaking the furnace for a long time in the high temperature peroxy molten steel furnace caused by 3 times of furnace reversing, the final slag is diluted to splash the slag, the furnace is washed later, and the melting point of the slag splashing layer is lower than that of the furnace in the blowing process.
4) The high sulfur content of molten iron is accompanied with the low temperature of silicon and iron, and the temperature loss of the steel-making mixer furnace during the tank folding is reduced by 50 ℃/time. The desulfurization in the converter blowing process is an endothermic reaction, so that the molten iron is about 90t in advance and 13t in scrap steel is consumed in high iron in the sulfur blast furnace to ensure heat. Therefore, how to remove sulfur efficiently becomes a problem which needs to be solved urgently at present.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a converter slag washing desulphurization process, which improves the desulphurization efficiency and the steel performance by pertinently using active ash powder and complex aluminum particles, and the specific technical scheme is as follows:
a process for removing sulfur by washing slag of converter includes such steps as adding activated ash powder and compound aluminium particles from the observation window to the stirring area of molten steel while blowing argon.
Furthermore, the using amount of the activated ash powder is 0.08-0.085% of the mass of the molten steel, and the using amount of the complex aluminum particles is 0.02-0.027% of the mass of the molten steel.
Further, the preparation method of the activated ash powder comprises the following steps:
(1) mixing of raw materials
Dissolving 30-50 parts by mass of calcium carbonate by using hydrochloric acid, diluting by 1-1.5 times, adding 1-2 parts by mass of lanthanum nitrate and 1-3 parts by mass of cerium nitrate, adding ethanol by 1-2 times by mass of calcium carbonate, stirring until the lanthanum nitrate and the cerium nitrate are completely dissolved, stirring for 20-30min, and sealing and standing for 2-3 h;
(2) precipitation of the solution
Heating the solution in the previous step to 50-60 ℃, fully atomizing by using an ultrasonic atomizer, enabling the atomized solution to flow into excessive potassium hydroxide solution at the flow rate of 2-3m/s by using a carrying agent, flushing the introduction pipeline by using water vapor at the temperature of 80-90 ℃ after the atomized solution flows in, introducing the flushed steam into the potassium hydroxide solution, reducing the temperature system of the solution to 3-5 ℃, stirring at the speed of 500-800r/min for 20-30min, raising the temperature to 60-70 ℃, standing for 20-30min, taking the lower layer precipitate, and cleaning for 2-3 times by using distilled water;
(3) preparation of activated ash powder
Mixing the precipitate prepared in the last step with starch, placing the mixture into a roasting furnace, heating the mixture to 800-; the mass ratio of the precipitate to the starch is 10: 2-3.
Further, the preparation method of the complex aluminum particles is as follows:
(1) raw material preparation
Preparing ethanol and sodium hydroxide into a saturated solution in parts by mass, adding magnesium nitrate into the saturated solution, and fully mixing for later use; the ratio of the amount of magnesium nitrate to the amount of sodium hydroxide is 3-5: 1;
(2) cleaning the precipitate
Diluting the above solution system with water 3-5 times, stirring at 30-35 deg.C for 20-30min, boiling under 2-3 standard atmospheric pressures for 2-3min, filtering while hot, and processing under reduced pressure to obtain magnesium hydroxide;
(3) manufacture of complex aluminum particles
Mixing the magnesium hydroxide with aluminum powder, stearic acid, ethanol and petroleum ether, and placing the mixture into an aluminum powder ball mill for ball milling for 3-5 hours; decompressing the ground mixture, collecting the solvent, placing the solvent in a vacuum heating dish, heating to 90-100 ℃, pumping to the pressure of 10-30Pa, injecting argon gas to raise the pressure to 200-300Pa, raising the temperature to 900-1000 ℃, and heating for 20-30 min.
Preferably, the mass fraction of the hydrochloric acid is 13-15%.
Preferably, the carrying agent is obtained by pressing air into the calcium hydroxide emulsion by a compressor and washing.
Preferably, the mass ratio of the carrying agent to the atomized solution is 5-8: 1.
Preferably, the mass fraction of the potassium hydroxide solution is 8-10%.
Preferably, the dosage of the magnesium hydroxide is 5-8% of the mass of the aluminum powder, the dosage of the stearic acid is 1-3% of the mass of the aluminum powder, the dosage of the ethanol is 40-50% of the mass of the aluminum powder, and the dosage of the petroleum ether is 13-15% of the mass of the aluminum powder.
Compared with the prior art, the invention has the technical effects that:
the invention atomizes the salt solution of calcium, lanthanum and cerium by ultrasonic atomization, carries the salt solution into alkali liquor by clean air to generate an alkaline mixture, then forms calcium lanthanum cerium system oxide with extremely uniform dispersion degree at high temperature, and can rapidly disperse in molten steel to improve the contact with sulfur to remove the sulfur. In addition, the invention utilizes the grinding of magnesium hydroxide and aluminum powder to reduce the granularity, and then utilizes the high-temperature decomposition to form a mixture of magnesium oxide and aluminum, and the mixture is added into the molten steel, thereby not only protecting the furnace body and avoiding the corrosion of the molten steel to improve the smelting efficiency of the steel, but also further removing sulfur, and further reducing the sulfur content in the steel.
Detailed Description
The technical solution of the present invention is further defined below with reference to the specific embodiments, but the scope of the claims is not limited to the description.
Example 1
A converter slag washing desulfurization process is characterized in that in the tapping process, live ash powder and complex aluminum particles are added from an observation window aiming at a steel flow stirring area, and argon blowing stirring operation is carried out simultaneously; the using amount of the activated ash powder is 0.08 percent of the mass of the molten steel, and the using amount of the complex aluminum particles is 0.02 percent of the mass of the molten steel;
the preparation method of the activated ash powder comprises the following steps:
(1) mixing of raw materials
Dissolving 30 parts by mass of calcium carbonate by using hydrochloric acid, diluting by 1 time, adding 1 part by mass of lanthanum nitrate and 1 part by mass of cerium nitrate, adding ethanol by 1 time by mass of calcium carbonate, stirring until the lanthanum nitrate and the cerium nitrate are completely dissolved, continuing stirring for 20min, and sealing and standing for 2 h; the mass fraction of the hydrochloric acid is 13%;
(2) precipitation of the solution
Heating the solution in the previous step to 50 ℃, fully atomizing by using an ultrasonic atomizer, enabling the atomized solution to flow into excessive potassium hydroxide solution at the flow rate of 2m/s by using a carrying agent, flushing an introducing pipeline by using water vapor at 80 ℃ after the atomized solution flows into the introducing pipeline, introducing flushed steam into the potassium hydroxide solution, reducing the temperature system of the solution to 3 ℃, stirring at the speed of 500r/min for 20min, raising the temperature to 60 ℃, standing for 20min, taking a lower layer precipitate, and adjusting the water content to 20%; the carrying agent is obtained by pressing air into the calcium hydroxide emulsion by a compressor and washing; the mass ratio of the carrying agent to the atomized solution is 5: 1; the mass fraction of the potassium hydroxide solution is 8%;
(3) preparation of activated ash powder
Mixing the precipitate and starch, placing into a roasting furnace, heating to 800 deg.C in an environment with 11% oxygen content, and roasting for 20 min; the mass ratio of the precipitate to the starch is 10: 2;
the preparation method of the complex aluminum particles comprises the following steps:
(1) raw material preparation
Preparing ethanol and sodium hydroxide into a saturated solution in parts by mass, adding magnesium nitrate into the saturated solution, and fully mixing for later use; the ratio of the amount of magnesium nitrate to the amount of sodium hydroxide is 3: 1;
(2) cleaning the precipitate
Diluting the solution system with water by 3 times, stirring at 30 deg.C for 20min, boiling under 2 standard atmospheric pressures for 2min, filtering while hot, and processing under reduced pressure to obtain magnesium hydroxide;
(3) manufacture of complex aluminum particles
Mixing the magnesium hydroxide with aluminum powder, stearic acid, ethanol and petroleum ether, and placing the mixture into an aluminum powder ball mill for ball milling for 3 hours; decompressing the ground mixture, collecting the solvent, placing the solvent in a vacuum heating dish, heating to 90 ℃, pumping to the pressure of 10Pa, injecting argon gas to increase the pressure to 200Pa, increasing the temperature to 900 ℃, and heating for 20min to obtain the complex aluminum particles;
the using amount of the magnesium hydroxide is 5% of the mass of the aluminum powder, the using amount of the stearic acid is 1% of the mass of the aluminum powder, the using amount of the ethanol is 40% of the mass of the aluminum powder, and the using amount of the petroleum ether is 13% of the mass of the aluminum powder;
example 2
A converter slag washing desulfurization process is characterized in that in the tapping process, live ash powder and complex aluminum particles are added from an observation window aiming at a steel flow stirring area, and argon blowing stirring operation is carried out simultaneously; the using amount of the active ash powder is 0.085 percent of the mass of the molten steel, and the using amount of the complex aluminum particles is 0.027 percent of the mass of the molten steel;
the preparation method of the activated ash powder comprises the following steps:
(1) mixing of raw materials
Dissolving 50 parts by mass of calcium carbonate by using hydrochloric acid, diluting by 1.5 times, adding 2 parts by mass of lanthanum nitrate and 3 parts by mass of cerium nitrate, adding ethanol by 2 times by mass of calcium carbonate, stirring until the lanthanum nitrate and the cerium nitrate are completely dissolved, stirring for 30min, and sealing and standing for 3 h; the mass fraction of the hydrochloric acid is 15%;
(2) precipitation of the solution
Heating the solution in the previous step to 60 ℃, fully atomizing by using an ultrasonic atomizer, enabling the atomized solution to flow into excessive potassium hydroxide solution at the flow rate of 3m/s by using a carrying agent, flushing an introduction pipeline by using water vapor at 90 ℃ after the atomized solution flows into the introduction pipeline, introducing the flushed steam into the potassium hydroxide solution, reducing the temperature system of the solution to 5 ℃, stirring for 30min at the speed of 800r/min, raising the temperature to 70 ℃, standing for 30min, taking a lower layer precipitate, and cleaning for 3 times by using distilled water; the carrying agent is obtained by pressing air into the calcium hydroxide emulsion by a compressor and washing; the mass ratio of the carrying agent to the atomized solution is 8: 1; the mass fraction of the potassium hydroxide solution is 10 percent;
(3) preparation of activated ash powder
Mixing the precipitate obtained in the previous step with starch, placing in a roasting furnace, heating to 900 deg.C in an environment with 13% oxygen content, and roasting for 30 min; the mass ratio of the precipitate to the starch is 10: 3;
the preparation method of the complex aluminum particles comprises the following steps:
(1) raw material preparation
Preparing ethanol and sodium hydroxide into a saturated solution in parts by mass, adding magnesium nitrate into the saturated solution, and fully mixing for later use; the ratio of the using amount of the magnesium nitrate to the amount of the sodium hydroxide is 5: 1;
(2) cleaning the precipitate
Diluting the solution system with water 5 times, stirring at 35 deg.C for 30min, boiling under 3 standard atmospheric pressures for 3min, filtering while hot, and processing under reduced pressure to obtain magnesium hydroxide;
(3) manufacture of complex aluminum particles
Mixing the magnesium hydroxide with aluminum powder, stearic acid, ethanol and petroleum ether, and placing the mixture into an aluminum powder ball mill for ball milling for 5 hours; collecting solvent under reduced pressure, placing in vacuum heating dish, heating to 100 deg.C, pumping to pressure of 30Pa, injecting argon gas to increase pressure to 300Pa, heating to 1000 deg.C,
the using amount of the magnesium hydroxide is 8% of the mass of the aluminum powder, the using amount of the stearic acid is 3% of the mass of the aluminum powder, the using amount of the ethanol is 50% of the mass of the aluminum powder, and the using amount of the petroleum ether is 15% of the mass of the aluminum powder;
example 3
A process for washing and desulfurizing slag of a converter comprises the steps of adding live ash powder and complex aluminum particles from an observation window aiming at a steel flow stirring area in the tapping process, and simultaneously carrying out argon blowing stirring operation; the using amount of the activated ash powder is 0.083% of the mass of the molten steel, and the using amount of the complex aluminum particles is 0.025% of the mass of the molten steel;
the preparation method of the activated ash powder comprises the following steps:
(1) mixing of raw materials
Dissolving 40 parts by mass of calcium carbonate by using hydrochloric acid, diluting by 1.5 times, adding 1 part of lanthanum nitrate and 3 parts of cerium nitrate, adding ethanol with the mass of 1 time of the calcium carbonate, stirring until the lanthanum nitrate and the cerium nitrate are completely dissolved, stirring for 30min, sealing and standing for 2 h; the mass fraction of the hydrochloric acid is 15%;
(2) precipitation of the solution
Heating the solution in the last step to 60 ℃, fully atomizing by using an ultrasonic atomizer, enabling the atomized solution to flow into excessive potassium hydroxide solution at the flow rate of 3m/s by using a carrying agent, flushing an introduction pipeline by using water vapor at 90 ℃ after the atomized solution flows into the introduction pipeline, introducing the flushed steam into the potassium hydroxide solution, reducing the temperature system of the solution to 3 ℃, stirring for 30min at the speed of 800r/min, raising the temperature to 60 ℃, standing for 30min, taking a lower layer precipitate, and cleaning for 3 times by using distilled water; the carrying agent is obtained by pressing air into the calcium hydroxide emulsion by a compressor and washing; the mass ratio of the carrying agent to the atomized solution is 5: 1; the mass fraction of the potassium hydroxide solution is 10 percent;
(3) preparation of activated ash powder
Mixing the precipitate obtained in the previous step with starch, placing in a roasting furnace, heating to 900 deg.C in an environment with 13% oxygen content, and roasting for 20 min; the mass ratio of the precipitate to the starch is 10: 3;
the preparation method of the complex aluminum particles comprises the following steps:
(1) raw material preparation
Preparing ethanol and sodium hydroxide into a saturated solution in parts by mass, adding magnesium nitrate into the saturated solution, and fully mixing for later use; the ratio of the using amount of the magnesium nitrate to the amount of the sodium hydroxide is 5: 1;
(2) cleaning the precipitate
Diluting the solution system with water by 3 times, stirring at 35 deg.C for 20min, boiling at 3 standard atmospheric pressures for 3min, filtering while hot, and processing under reduced pressure to obtain magnesium hydroxide;
(3) manufacture of complex aluminum particles
Mixing the magnesium hydroxide with aluminum powder, stearic acid, ethanol and petroleum ether, and placing the mixture into an aluminum powder ball mill for ball milling for 5 hours; decompressing the ground mixture, collecting the solvent, placing the solvent in a vacuum heating dish, heating to 90 ℃, pumping to the pressure of 30Pa, injecting argon gas to increase the pressure to 200Pa, increasing the temperature to 1000 ℃, and heating for 20 min;
the using amount of the magnesium hydroxide is 8% of the mass of the aluminum powder, the using amount of the stearic acid is 1% of the mass of the aluminum powder, the using amount of the ethanol is 50% of the mass of the aluminum powder, and the using amount of the petroleum ether is 13% of the mass of the aluminum powder;
comparative example setup:
test example 1
The steel desulfurization effects were examined as follows, operating according to examples 1-3 and comparative examples 1-5, respectively:
the Delta S represents the sulfur in the molten steel in the tapping furnace, namely the finished product sulfur, and the table shows that the desulfurization efficiency of the embodiments 1 to 3 is highest, and the scheme of the invention has obvious effect on removing the sulfur in the finished product steel.
Claims (9)
1. A process for washing and desulfurizing the slag of converter features that during tapping, the active ash powder and Al particles are added from the observation window to the stirring area of steel stream while argon blowing and stirring are performed.
2. The process for slag washing desulphurization of the converter according to claim 1, wherein the amount of the activated ash powder is 0.08-0.085% of the mass of the molten steel, and the amount of the complex aluminum particles is 0.02-0.027% of the mass of the molten steel.
3. The process for slag washing desulfurization of a converter according to claim 1, wherein the production steps of the fly ash powder are as follows:
(1) mixing of raw materials
Dissolving 30-50 parts by mass of calcium carbonate by using hydrochloric acid, diluting by 1-1.5 times, adding 1-2 parts by mass of lanthanum nitrate and 1-3 parts by mass of cerium nitrate, adding ethanol by 1-2 times by mass of calcium carbonate, stirring until the lanthanum nitrate and the cerium nitrate are completely dissolved, stirring for 20-30min, and sealing and standing for 2-3 h;
(2) precipitation of the solution
Heating the solution in the previous step to 50-60 ℃, fully atomizing by using an ultrasonic atomizer, enabling the atomized solution to flow into excessive potassium hydroxide solution at the flow rate of 2-3m/s by using a carrying agent, flushing the introduction pipeline by using water vapor at the temperature of 80-90 ℃ after the atomized solution flows in, introducing the flushed steam into the potassium hydroxide solution, reducing the temperature system of the solution to 3-5 ℃, stirring at the speed of 500-800r/min for 20-30min, raising the temperature to 60-70 ℃, standing for 20-30min, taking the lower layer precipitate, and cleaning for 2-3 times by using distilled water;
(3) preparation of activated ash powder
Mixing the precipitate prepared in the last step with starch, placing the mixture into a roasting furnace, heating the mixture to 800-; the mass ratio of the precipitate to the starch is 10: 2-3.
4. The process of converter slag washing desulphurization according to claim 1, wherein the complex aluminum particles are produced in a manner that:
(1) raw material preparation
Preparing ethanol and sodium hydroxide into a saturated solution in parts by mass, adding magnesium nitrate into the saturated solution, and fully mixing for later use; the ratio of the using amount of the magnesium nitrate to the amount of the sodium hydroxide is 3-5: 1;
(2) cleaning the precipitate
Diluting the above solution system with water 3-5 times, stirring at 30-35 deg.C for 20-30min, boiling under 2-3 standard atmospheric pressures for 2-3min, filtering while hot, and processing under reduced pressure to obtain magnesium hydroxide;
(3) manufacture of complex aluminum particles
Mixing the magnesium hydroxide with aluminum powder, stearic acid, ethanol and petroleum ether, and placing the mixture into an aluminum powder ball mill for ball milling for 3-5 hours; decompressing the ground mixture, collecting the solvent, placing the solvent in a vacuum heating dish, heating to 90-100 ℃, pumping to the pressure of 10-30Pa, injecting argon gas to raise the pressure to 200-300Pa, raising the temperature to 900-1000 ℃, and heating for 20-30 min.
5. The process for converter slag washing desulphurization according to claim 3, wherein the mass fraction of the hydrochloric acid is 13-15%.
6. The process of converter slag washing desulphurization according to claim 3, wherein the carrying agent is obtained by pressing air into the calcium hydroxide emulsion by a compressor and washing.
7. The process for converter slag washing desulphurization according to claim 3, wherein the mass ratio of the carrying agent to the atomized solution is 5-8: 1.
8. The process for desulfurization by slag washing of a converter according to claim 3, wherein the mass fraction of the potassium hydroxide solution is 8-10%.
9. The converter slag washing desulphurization process defined in claim 3, wherein the magnesium hydroxide is 5-8% of the aluminum powder, the stearic acid is 1-3% of the aluminum powder, the ethanol is 40-50% of the aluminum powder, and the petroleum ether is 13-15% of the aluminum powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210262698.9A CN114606362B (en) | 2022-03-17 | 2022-03-17 | Converter slag washing desulfurization process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210262698.9A CN114606362B (en) | 2022-03-17 | 2022-03-17 | Converter slag washing desulfurization process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114606362A true CN114606362A (en) | 2022-06-10 |
| CN114606362B CN114606362B (en) | 2023-08-11 |
Family
ID=81863601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210262698.9A Active CN114606362B (en) | 2022-03-17 | 2022-03-17 | Converter slag washing desulfurization process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114606362B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102534120A (en) * | 2012-02-29 | 2012-07-04 | 首钢总公司 | Smelting process for production of super-low sulphur steel |
| EP2918688A1 (en) * | 2014-03-11 | 2015-09-16 | Affival | Method for desulphurisation of hot metal, and flux-cored wire for implementing same |
| CN106011377A (en) * | 2015-10-20 | 2016-10-12 | 南京钢铁股份有限公司 | Control technology for B-class inclusions of low-carbon low-sulfur pipeline steel |
| CN107604120A (en) * | 2017-09-12 | 2018-01-19 | 攀钢集团攀枝花钢铁研究院有限公司 | Low-phosphorous low-sulfur method for making steel |
| WO2020215688A1 (en) * | 2019-04-23 | 2020-10-29 | 南京钢铁股份有限公司 | Process for smelting ultra-low-carbon and ultra-low-sulfur steel |
-
2022
- 2022-03-17 CN CN202210262698.9A patent/CN114606362B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102534120A (en) * | 2012-02-29 | 2012-07-04 | 首钢总公司 | Smelting process for production of super-low sulphur steel |
| EP2918688A1 (en) * | 2014-03-11 | 2015-09-16 | Affival | Method for desulphurisation of hot metal, and flux-cored wire for implementing same |
| CN106011377A (en) * | 2015-10-20 | 2016-10-12 | 南京钢铁股份有限公司 | Control technology for B-class inclusions of low-carbon low-sulfur pipeline steel |
| CN107604120A (en) * | 2017-09-12 | 2018-01-19 | 攀钢集团攀枝花钢铁研究院有限公司 | Low-phosphorous low-sulfur method for making steel |
| WO2020215688A1 (en) * | 2019-04-23 | 2020-10-29 | 南京钢铁股份有限公司 | Process for smelting ultra-low-carbon and ultra-low-sulfur steel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114606362B (en) | 2023-08-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102586543B (en) | Steel ladle slag reducing agent with high calcium oxide content, and preparation method thereof | |
| CN111334644A (en) | Fluorine-free refining fluxing slag melting agent and preparation and use method thereof | |
| CN111057817A (en) | Economic and environment-friendly efficient desulfurization refining slag system and production method thereof | |
| CN107586918B (en) | Method for controlling inclusions in thin-gauge hot-rolled dual-phase steel | |
| CN107779550B (en) | The method of molten steel manganeisen additional amount is reduced in a kind of refining process | |
| CN114606362B (en) | Converter slag washing desulfurization process | |
| CN111748670B (en) | Method for improving chromium ore reduction by bottom blowing oxygen-lime powder | |
| CN110184539B (en) | Low-cost high-conductivity electrode flat steel and smelting method thereof | |
| CN107090537A (en) | Control the smelting process of Valve Steel field trash | |
| CN113832290B (en) | Method for refining low-carbon low-silicon aluminum-containing killed steel to form slag quickly | |
| CN111893247B (en) | Steelmaking method with high-efficiency refining function | |
| CN112979189A (en) | Modification method of converter slag applied to cement production | |
| CN111961797A (en) | Method for increasing CO content in semisteel steelmaking converter gas | |
| CN111020115A (en) | Method for refining molten steel outside furnace by using liquid blast furnace slag | |
| CN115418435B (en) | Refining slag online modification method | |
| CN112281048A (en) | Method for improving chromium yield of stainless steel AOD converter | |
| CN112301181B (en) | Method for inhibiting generation of vanadium extraction semisteel smoke dust | |
| CN113943846B (en) | Method for improving addition proportion of converter scrap steel | |
| CN110093545A (en) | A kind of method that rotary hearth furnace prepares VN alloy | |
| CN100334232C (en) | Steel smelting process of core bar for rolling seamless steel pipe | |
| CN113136480B (en) | Ladle slag modifier and preparation and use method thereof | |
| CN114855002B (en) | Low-titanium high-carbon ferrochrome and production method thereof | |
| CN114107588B (en) | Preparation method of high-purity molten iron | |
| CN114855003B (en) | Low-titanium low-sulfur ferrochrome and production method thereof | |
| CN114411045B (en) | Production method of B-alloy-containing structural steel for automobile parts |
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 |