CN111721118A - Method for charging and discharging oxygen-enriched intensified smelting furnace molten pool - Google Patents
Method for charging and discharging oxygen-enriched intensified smelting furnace molten pool Download PDFInfo
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- CN111721118A CN111721118A CN201910216992.4A CN201910216992A CN111721118A CN 111721118 A CN111721118 A CN 111721118A CN 201910216992 A CN201910216992 A CN 201910216992A CN 111721118 A CN111721118 A CN 111721118A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
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- F27B14/00—Crucible or pot furnaces
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- F27B14/0806—Charging or discharging devices
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Abstract
The invention aims to provide a method for charging and discharging a molten pool of an oxygen-enriched intensified smelting furnace, which is characterized by comprising the following steps of: 8 feed inlets are uniformly distributed at the top of the oxygen-enriched smelting furnace, a small amount of multi-batch feeding method is adopted, the problem of material accumulation in the oxygen-enriched smelting furnace is solved, the amount of blown oxygen-enriched air is changed according to different feeding amounts, and the multi-batch feeding smelting furnace is quicker in temperature rise and more thorough in reaction.
Description
Technical Field
The invention relates to the technical field of chemistry and metallurgy, in particular to a method for charging and discharging a melting pool of an oxygen-enriched intensified smelting furnace.
Background
At present, a domestic oxygen-enriched molten pool smelting furnace generally adopts a side end part or top feeding mode, a waste heat boiler adopts the side end part, solid materials entering the smelting furnace can form material accumulation at the side end part, and material melting difficulty is caused locally; the top feeding is generally adopted without a waste heat boiler, solid materials entering a smelting furnace can form material accumulation in the center of the furnace, the material melting is difficult, a slag tap of the furnace of a common oxygen-enriched molten pool smelting furnace is not in the same direction as a lead-antimony alloy tap, the slag tap is vertically intersected with the central line of the lead-antimony alloy tap, the slag tap is generally arranged at the end part of the oxygen-enriched reinforced smelting furnace, and the lead-antimony alloy tap is generally arranged at the side end of the oxygen-enriched reinforced smelting furnace. The side end is inconvenient to operate due to the air inlet pipe.
Lead smelting enterprises generally adopt a pyrogenic process to recover valuable metals such as lead, antimony, copper and the like in lead-antimony-copper-containing slag, the pyrogenic process treatment process comprises a blast furnace method, a reverberatory furnace method, an electric furnace method, a rotary furnace method and the like, and the two sides are generally adopted for feeding materials. Therefore, the charging and discharging method of the oxygen-enriched molten pool smelting furnace with uniform charging and simple slag discharging is urgently needed to be developed.
Disclosure of Invention
The invention aims to provide a method for charging and discharging a molten pool of an oxygen-enriched intensified smelting furnace,
the object of the invention is achieved by the following steps:
1) the top of the oxygen-enriched intensified smelting furnace is sequentially provided with a second feed opening, a third feed opening, a fourth feed opening, a fifth feed opening, a sixth feed opening, a seventh feed opening, an eighth feed opening and a ninth feed opening, the lead-antimony-containing copper slag and anthracite are mixed according to the weight ratio of 100: 2-10, the mixed materials are filled by a funnel, the funnel is conical, the length of the feed opening is 150 plus materials and 200mm, the diameter of the funnel is 80-280mm, and the diameter of the round tube is less than the diameter of the feed opening and is 20 mm;
2) feeding the hopper filled with the materials in the step (1) from a fourth feeding port and an eighth feeding port, and then from a third feeding port and a seventh feeding port, wherein 3-6 tons of the materials are fed into the third feeding port, the fourth feeding port, the seventh feeding port and the eighth feeding port each time, then feeding materials from a fifth feeding port and a ninth feeding port, feeding materials from a second feeding port and a sixth feeding port, wherein the second feeding port, the sixth feeding port, the fifth feeding port and the ninth feeding port are fed with 2-5 tons each time, and feeding is carried out for 2-4 times per hour, in the feeding process, the melting condition in the furnace is observed from 8 feeding ports, the feeding ports with better melting are melted, feeding is carried out, the material handling capacity is increased by 1-5 tons each time, 50-300 m oxygen-enriched air is sprayed into each ton of granules, and after the temperature is increased for 1-3 hours, the temperature in the furnace is gradually increased to 1000-1200 ℃;
3) observing the melting condition in the furnace from a feeding port, when the melting condition in the furnace is not ideal, spraying 300-500 m oxygen-enriched air in an increasing mode, raising the temperature for 0.5-1 h to ensure that the materials are completely melted, stopping oxygen supply after the materials in the furnace are completely melted, controlling the temperature in the furnace at 800-1100 ℃, carrying out reduction smelting for 2-8 h, converting most of PbO in a molten pool into lead, generating lead-antimony alloy from lead and antimony, and carrying out Cu in the molten pool2S and FeS are mutually melted to generate coarse matte, FeO and CaO in a molten pool and SiO in anthracite2Slag forming reaction to form SiO2-FeO-CaO slag system, SiO control2The slag system of-FeO-CaO comprises 10 to 30 percent of CaO and 20 to 30 percent of SiO2And 40-60% of FeO, wherein the slag type of the furnace slag is a fusion body of iron calcium silicate, has the lowest melting point and the lowest viscosity, is favorable for reducing the smelting time and the lead content of the slag, produces high-temperature flue gas through reaction, achieves the balance between lead in the crude lead and the furnace slag and PbS, Pb or PbO in the generated flue gas, produces high-temperature flue gas through reaction, and is discharged after being cooled and desulfurized to reach the standard. Generating oxygen-enriched molten pool smelting slag, taking a slag sample from a tuyere of a melting furnace of the oxygen-enriched molten pool for rapid analysis, and finishing smelting when the lead content of slag is reduced to below 2%;
4) the lower part of the oxygen-enriched strengthening smelting furnace is provided with a discharge water jacket, the lower part of the discharge water jacket is provided with a discharge port, the bottom of the oxygen-enriched reduction smelting furnace is provided with a discharge rail, the other end of the discharge rail is connected with an ingot mold, because the specific gravity difference is large, the melt is naturally layered, firstly, lead-antimony alloy is discharged from the discharge port, ingot casting is carried out, crude copper matte on the surface of a lead-antimony alloy ingot is separately fished out and piled up, and when slag is found at the discharge port.
As a further improvement of the invention, the lead-antimony-containing copper slag in the step (1) contains 60-80% of lead, 2-10% of antimony, 2-10% of copper and 1-5% of sulfur.
As a further improvement of the invention, the particle size of the pulverized coal in the step (1) is more than 80% of minus 200 meshes, wherein the pulverized coal contains 80-90% of carbon, 0.1-1.5% of sulfur, 8-15% of ash and 2-5% of volatile matters.
As a further improvement of the invention, the oxygen concentration of the oxygen-enriched air in the step (2) is 22-40%.
As a further improvement of the invention, the lead-antimony alloy in the step (4) contains more than 90% of lead, 2-10% of antimony, 30-50% of copper and 15-25% of sulfur.
The invention has the beneficial effects that:
1. the solid material of the invention does not need casting blocks or pretreatment, and can effectively reduce the production cost.
2. The invention can observe the smelting situation in the oxygen-enriched intensified smelting furnace at any time, adjust the oxygen-enriched concentration according to the working condition and is beneficial to intensified smelting.
3. The invention carries out targeted charging according to the conditions in the furnace, and is beneficial to improving the smelting efficiency.
4. The invention has smaller charging hole, is convenient to be blocked at any time and is beneficial to preventing the smoke from overflowing.
5. The invention is uniformly distributed at the top of the oxygen-enriched intensified smelting furnace, which is beneficial to operation.
6. The slag tap, the rough matte tap and the lead-antimony alloy tap are arranged at the end parts, so that the operation time is shortened, and the production efficiency is improved.
7. The slag tap, the rough matte tap and the lead-antimony alloy tap are arranged at the end parts, so that the operation space is large, and the operation is simple and convenient.
8. The invention utilizes the rail to transport the lead-antimony alloy ingot, the coarse ice copper ingot and the slag ingot, and can reduce the labor intensity.
Drawings
FIG. 1 is a process flow diagram of the present invention;
FIG. 2 is a schematic view of the top of the oxygen-enriched enhanced smelting furnace of the present invention;
FIG. 3 is a schematic view of the discharging device of the oxygen-enriched intensified smelting furnace of the present invention.
Detailed Description
The present invention is further illustrated by the following examples and the accompanying drawings, but the present invention is not limited thereto in any way, and any modifications or alterations based on the teaching of the present invention are within the scope of the present invention.
Example 1
1) The furnace top of the oxygen-enriched intensified smelting furnace 1 is sequentially provided with a second feed opening 2, a third feed opening 7, a fourth feed opening 8, a fifth feed opening 9, a sixth feed opening 10, a seventh feed opening 11, an eighth feed opening 12 and a ninth feed opening 13, lead-antimony-copper slag contains 60% of lead, 10% of antimony, 10% of copper, 5% of sulfur and 80% of pulverized coal with the granularity of-200 meshes, wherein the lead-antimony-copper slag contains 80% of carbon, 1.5% of sulfur, 14% of ash and 5% of volatile matters, the lead-antimony-copper slag and anthracite are mixed according to the weight ratio of 100:2, the mixed materials are filled by a funnel, the funnel is conical, the length of the feed opening is 150mm, a round pipe with the diameter phi of 80mm is arranged, and the diameter of the round pipe is smaller.
2) Feeding the hopper filled with the materials in the step (1) from a fourth feeding port 8 and an eighth feeding port 12, then from a third feeding port 7 and a seventh feeding port 11, and feeding 3 tons of the materials into the hopper from the third feeding port 7, the fourth feeding port 8, the seventh feeding port 11 and the eighth feeding port 12 at a time, then feeding materials from a fifth feeding port 9 and a ninth feeding port 13, feeding materials from a second feeding port 2 and a sixth feeding port 10, feeding 2 tons of materials from the second feeding port 2, the sixth feeding port 10, the fifth feeding port 9 and the ninth feeding port 13 every time, feeding 2 times per hour, in the feeding process, observing the melting condition in the furnace from 8 feeding ports, melting the better feeding port, feeding materials, increasing the material handling capacity by 1 ton each time, spraying oxygen-enriched air with the oxygen-enriched air being 50m for each ton of granules, and gradually increasing the temperature in the furnace to 1000 ℃ after heating for 1 hour;
3) observing the melting condition in the furnace from a feeding port, when the melting condition in the furnace is not ideal, spraying 300m of oxygen-enriched air in an increasing mode, heating for 0.5h to ensure that the materials are completely melted, stopping oxygen supply after the materials in the furnace are completely melted, controlling the temperature in the furnace at 800 ℃, carrying out reduction smelting for 2h, and converting most of PbO in a molten pool into lead and generating lead-antimony alloy by lead and antimony; cu in the molten bath2S and FeS are mutually melted to generate coarse matte; FeO, CaO in molten pool and SiO in anthracite2Slag forming reaction to form SiO2-FeO-CaO slag system, SiO control2The slag system of-FeO-CaO has the composition of 10% CaO and 30% SiO2And 60% of FeO, wherein the slag type of the slag is a fusion body of iron-calcium silicate, has the lowest melting point and the lowest viscosity, is beneficial to reducing the smelting time and the lead content of the slag, produces high-temperature flue gas through reaction, achieves balance between lead in the crude lead and the slag and PbS, Pb or PbO in the produced flue gas, produces the high-temperature flue gas through reaction, and is discharged after being cooled and desulfurized to reach the standard. And generating oxygen-enriched molten pool smelting slag, taking a slag sample from a tuyere of a melting furnace of the oxygen-enriched molten pool for rapid analysis, and finishing smelting when the lead content of the slag is reduced to 1.8%.
4) The lower part of the oxygen-enriched strengthening smelting furnace 1 is provided with a discharge water jacket 3, the lower part of the discharge water jacket 3 is provided with a discharge port 4, the bottom of the oxygen-enriched reduction smelting furnace 1 is provided with a discharge rail 5, the other end of the discharge rail 5 is connected with an ingot mold 6, and due to the fact that the specific gravity difference is large, a melt is naturally layered, lead-antimony alloy is firstly discharged from the discharge port and cast into an ingot, wherein the lead-antimony alloy contains 92% of; taking out the crude copper matte on the surface of the lead-antimony alloy ingot, and separately piling the crude copper matte, wherein the copper content of the copper matte is 50 percent, and the sulfur content of the copper matte is 15 percent; when the discharge port is found to be slagging, a slag ingot is started.
Example 2
1) The furnace top of the oxygen-enriched intensified smelting furnace 1 is sequentially provided with a second feed opening 2, a third feed opening 7, a fourth feed opening 8, a fifth feed opening 9, a sixth feed opening 10, a seventh feed opening 11, an eighth feed opening 12 and a ninth feed opening 13, lead and antimony contained in lead antimony copper slag is 70%, antimony contained in lead is 6%, copper is 6%, sulfur is 3%, the granularity of pulverized coal is 80% of minus 200 meshes, the content of carbon is 85%, the content of sulfur is 0.7%, ash content is 11%, and volatile matter is 3.5%, the lead antimony copper slag and anthracite are mixed according to the weight ratio of 100:6, the mixed materials are filled by a funnel, the funnel is conical, the length of the feed opening is 180mm, the diameter phi of a circular tube is 180mm, and the diameter of the circular tube is less than 20mm of the diameter of the feed.
2) Feeding the hopper filled with the materials in the step (1) from a fourth feeding port 8 and an eighth feeding port 12, then from a third feeding port 7 and a seventh feeding port 11, and feeding 4.5 tons of the materials into the hopper from the third feeding port 7, the fourth feeding port 8, the seventh feeding port 11 and the eighth feeding port 12 every time, then feeding materials from a fifth feeding port 9 and a ninth feeding port 13, feeding materials from a second feeding port 2 and a sixth feeding port 10, feeding 3 tons of materials from the second feeding port 2, the sixth feeding port 10, the fifth feeding port 9 and the ninth feeding port 13 every time, feeding 3 times per hour, in the charging process, the melting condition in the furnace is observed from 8 charging ports, the charging port with better melting is used for feeding materials, 3 tons of materials are fed each time, the material handling capacity is increased, the oxygen-enriched air is sprayed into 180m oxygen-enriched air for each ton of granules, and the temperature in the furnace is gradually increased to 1100 ℃ after the temperature is increased for 2 hours;
3) observing the melting condition in the furnace from a feeding port, when the melting condition in the furnace is not ideal, spraying oxygen-enriched air of 400m in an increasing mode, heating for 0.7h to ensure that the materials are completely melted, stopping oxygen supply after the materials in the furnace are completely melted, controlling the temperature in the furnace at 950 ℃, carrying out reduction smelting for 5h, and converting most of PbO in a molten pool into lead, wherein the lead and the antimony generate lead-antimony alloy; cu in the molten bath2S and FeS are mutually melted to generate coarse matte; FeO, CaO in molten pool and SiO in anthracite2Slag forming reaction to form SiO2-FeO-CaO slag system, SiO control2The slag system of-FeO-CaO comprises 20% CaO and 15% SiO2And 50% of FeO, wherein the slag type of the slag is a fusion body of iron-calcium silicate, has the lowest melting point and the lowest viscosity, is beneficial to reducing the smelting time and the lead content of the slag, produces high-temperature flue gas through reaction, achieves balance between lead in the crude lead and the slag and PbS, Pb or PbO in the produced flue gas, produces the high-temperature flue gas through reaction, and is discharged after being cooled and desulfurized to reach the standard. And generating oxygen-enriched molten pool smelting slag, taking a slag sample from a tuyere of a melting furnace of the oxygen-enriched molten pool for rapid analysis, and finishing smelting when the lead content of the slag is reduced to 1.6%.
4) The lower part of the oxygen-enriched strengthening smelting furnace 1 is provided with a discharge water jacket 3, the lower part of the discharge water jacket 3 is provided with a discharge port 4, the bottom of the oxygen-enriched reduction smelting furnace 1 is provided with a discharge rail 5, the other end of the discharge rail 5 is connected with an ingot mold 6, and due to the fact that the specific gravity difference is large, a melt is naturally layered, lead-antimony alloy is firstly discharged from the discharge port and cast into an ingot, wherein the lead-antimony alloy contains 94% of; taking out the crude copper matte on the surface of the lead-antimony alloy ingot, and separately piling the crude copper matte, wherein the copper matte contains 40% of copper and the sulfur content is 20%; when the discharge port is found to be slagging, a slag ingot is started.
Example 3
1) The furnace top of the oxygen-enriched intensified smelting furnace 1 is sequentially provided with a second feed inlet 2, a third feed inlet 7, a fourth feed inlet 8, a fifth feed inlet 9, a sixth feed inlet 10, a seventh feed inlet 11, an eighth feed inlet 12 and a ninth feed inlet 13, lead 80% of lead antimony copper slag, 2% of antimony, 2% of copper, 1% of sulfur and 90% of pulverized coal with the granularity of-200 meshes, wherein the carbon is 90%, the sulfur is 0.1%, the ash content is 7% and the volatile is 2%, the lead antimony copper slag and anthracite are mixed according to the weight ratio of 100:10, the mixed materials are filled by a funnel, the funnel is conical, the length of the feed inlet is 200mm, the diameter phi of a circular tube is 280mm, and the diameter of the circular tube is less than 20mm of the diameter of the feed inlet.
2) Feeding the hopper filled with the materials in the step (1) from a fourth feeding port 8 and an eighth feeding port 12, then from a third feeding port 7 and a seventh feeding port 11, and feeding 6 tons of the materials into the hopper from the third feeding port 7, the fourth feeding port 8, the seventh feeding port 11 and the eighth feeding port 12 at a time, then feeding materials from a fifth feeding port 9 and a ninth feeding port 13, feeding materials from a second feeding port 2 and a sixth feeding port 10, feeding 5 tons of materials from the second feeding port 2, the sixth feeding port 10, the fifth feeding port 9 and the ninth feeding port 13 every time, feeding for 4 times per hour, in the charging process, the melting condition in the furnace is observed from 8 charging ports, the charging port with better melting is used for feeding, the material handling capacity is increased by 5 tons each time, the oxygen-enriched air is sprayed into 300m oxygen-enriched air for each ton of granules, and the temperature in the furnace is gradually increased to 1200 ℃ after the temperature is increased for 3 hours;
3) observing the melting condition in the furnace from a feeding port, when the melting condition in the furnace is not ideal, spraying oxygen-enriched air of 400m in an increasing mode, heating for 1h to ensure that the materials are completely melted, stopping oxygen supply after the materials in the furnace are completely melted, controlling the temperature in the furnace at 1100 ℃, carrying out reduction smelting for 8h, and converting most of PbO in a molten pool into lead, wherein lead and antimony generate lead-antimony alloy; cu in the molten bath2S and FeS are mutually melted to generate coarse matte; FeO, CaO in molten pool and SiO in anthracite2Slag forming reaction to form SiO2-FeO-CaO slag system, SiO control2The slag system of-FeO-CaO has the composition of 30% CaO and 20% SiO2And 45% of FeO, wherein the slag type of the slag is a fusion body of iron-calcium silicate, has the lowest melting point and the lowest viscosity, is beneficial to reducing the smelting time and the lead content of the slag, produces high-temperature flue gas through reaction, achieves balance between lead in the crude lead and the slag and PbS, Pb or PbO in the produced flue gas, produces the high-temperature flue gas through reaction, and is discharged after being cooled and desulfurized to reach the standard. And generating oxygen-enriched molten pool smelting slag, taking a slag sample from a tuyere of a melting furnace of the oxygen-enriched molten pool for rapid analysis, and finishing smelting when the lead content of the slag is reduced to 1.4%.
4) The lower part of the oxygen-enriched strengthening smelting furnace 1 is provided with a discharge water jacket 3, the lower part of the discharge water jacket 3 is provided with a discharge port 4, the bottom of the oxygen-enriched reduction smelting furnace 1 is provided with a discharge rail 5, the other end of the discharge rail 5 is connected with an ingot mold 6, and due to the fact that the specific gravity difference is large, a melt is naturally layered, lead-antimony alloy is firstly discharged from the discharge port and cast into an ingot, wherein the lead-antimony alloy contains 96% of; taking out the crude copper matte on the surface of the lead-antimony alloy ingot, and separately piling the crude copper matte, wherein the copper content of the copper matte is 30 percent, and the sulfur content of the copper matte is 25 percent; when the discharge port is found to be slagging, a slag ingot is started.
Claims (5)
1. A method for charging and discharging a melting pool of an oxygen-enriched intensified smelting furnace comprises the following steps:
1) the top of the oxygen-enriched intensified smelting furnace is sequentially provided with a second feed opening, a third feed opening, a fourth feed opening, a fifth feed opening, a sixth feed opening, a seventh feed opening, an eighth feed opening and a ninth feed opening, the lead-antimony-containing copper slag and anthracite are mixed according to the weight ratio of 100: 2-10, the mixed materials are filled by a funnel, the funnel is conical, the length of the feed opening is 150 plus materials and 200mm, the diameter of the funnel is 80-280mm, and the diameter of the round tube is less than the diameter of the feed opening and is 20 mm;
2) feeding the hopper filled with the materials in the step (1) from a fourth feeding port and an eighth feeding port, and then from a third feeding port and a seventh feeding port, wherein 3-6 tons of the materials are fed into the third feeding port, the fourth feeding port, the seventh feeding port and the eighth feeding port each time, then feeding materials from a fifth feeding port and a ninth feeding port, feeding materials from a second feeding port and a sixth feeding port, wherein the second feeding port, the sixth feeding port, the fifth feeding port and the ninth feeding port are fed with 2-5 tons each time, and feeding is carried out for 2-4 times per hour, in the feeding process, the melting condition in the furnace is observed from 8 feeding ports, the feeding ports with better melting are melted, feeding is carried out, the material handling capacity is increased by 1-5 tons each time, 50-300 m oxygen-enriched air is sprayed into each ton of granules, and after the temperature is increased for 1-3 hours, the temperature in the furnace is gradually increased to 1000-1200 ℃;
3) observing the melting condition in the furnace from a feeding port, when the melting condition in the furnace is not ideal, spraying 300-500 m oxygen-enriched air in an increasing mode, raising the temperature for 0.5-1 h to ensure that the materials are completely melted, stopping oxygen supply after the materials in the furnace are completely melted, controlling the temperature in the furnace at 800-1100 ℃, carrying out reduction smelting for 2-8 h, converting most of PbO in a molten pool into lead, generating lead-antimony alloy from lead and antimony, and carrying out Cu in the molten pool2S and FeS are mutually melted to generate coarse matte, FeO and CaO in a molten pool and SiO in anthracite2Slag forming reaction to form SiO2-FeO-CaO slag system, SiO control2The slag system of-FeO-CaO comprises 10 to 30 percent of CaO and 20 to 30 percent of SiO2And 40% to 60% of FeO, the slag type of the slag is a fusion body of iron calcium silicate, has the lowest melting point and the lowest viscosity, is beneficial to reducing the smelting time and the lead content of the slag, produces high-temperature flue gas through reaction, achieves the balance among lead in the crude lead and the slag and PbS, Pb or PbO in the generated flue gas, produces the high-temperature flue gas through reaction, and is discharged after being cooled and desulfurized to reach the standard. Generating oxygen-enriched molten pool smelting slag, taking a slag sample from a tuyere of a melting furnace of the oxygen-enriched molten pool for rapid analysis, and finishing smelting when the lead content of slag is reduced to below 2%;
4) the lower part of the oxygen-enriched strengthening smelting furnace is provided with a discharge water jacket, the lower part of the discharge water jacket is provided with a discharge port, the bottom of the oxygen-enriched reduction smelting furnace is provided with a discharge rail, the other end of the discharge rail is connected with an ingot mold, because the specific gravity difference is large, the melt is naturally layered, firstly, lead-antimony alloy is discharged from the discharge port, ingot casting is carried out, crude copper matte on the surface of a lead-antimony alloy ingot is separately fished out and piled up, and when slag is found at the discharge port.
2. The method for charging and discharging the melting pool of the oxygen-enriched intensified smelting furnace according to claim 1, characterized in that: the lead-antimony-containing copper slag in the step (1) contains 60-80% of lead, 2-10% of antimony, 2-10% of copper and 1-5% of sulfur.
3. The method for charging and discharging the melting pool of the oxygen-enriched intensified smelting furnace according to claim 1, characterized in that: the particle size of the pulverized coal in the step (1) is more than 80% of minus 200 meshes, wherein the pulverized coal contains 80-90% of carbon, 0.1-1.5% of sulfur, 8-15% of ash and 2-5% of volatile matters.
4. The method for charging and discharging the melting pool of the oxygen-enriched intensified smelting furnace according to claim 1, characterized in that: the oxygen concentration of the oxygen-enriched air in the step (2) is 22-40%.
5. The method for charging and discharging the molten pool of the oxygen-enriched intensified smelting furnace according to any one of claims 1 to 4, characterized by comprising the following steps: the lead-antimony alloy in the step (4) contains more than 90% of lead, 2-10% of antimony, 30-50% of copper and 15-25% of sulfur.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104894380A (en) * | 2015-05-18 | 2015-09-09 | 张圣南 | Airtight oxygen-rich negative pressure efficient smelting furnace directional smelting clean production process |
| CN207391515U (en) * | 2017-09-18 | 2018-05-22 | 中国瑞林工程技术有限公司 | Oxygen-enriched side-blowing smelting equipment |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104894380A (en) * | 2015-05-18 | 2015-09-09 | 张圣南 | Airtight oxygen-rich negative pressure efficient smelting furnace directional smelting clean production process |
| CN207391515U (en) * | 2017-09-18 | 2018-05-22 | 中国瑞林工程技术有限公司 | Oxygen-enriched side-blowing smelting equipment |
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Application publication date: 20200929 |