CN110055429B - Oxygen-enriched converting method for Kaldo furnace - Google Patents
Oxygen-enriched converting method for Kaldo furnace Download PDFInfo
- Publication number
- CN110055429B CN110055429B CN201910317277.XA CN201910317277A CN110055429B CN 110055429 B CN110055429 B CN 110055429B CN 201910317277 A CN201910317277 A CN 201910317277A CN 110055429 B CN110055429 B CN 110055429B
- Authority
- CN
- China
- Prior art keywords
- oxygen
- melt
- content
- kaldo furnace
- enriched air
- 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.)
- Active
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B15/00—Obtaining copper
- C22B15/0026—Pyrometallurgy
- C22B15/0028—Smelting or converting
- C22B15/003—Bath smelting or converting
- C22B15/0034—Bath smelting or converting in rotary furnaces, e.g. kaldo-type furnaces
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a Kaldo furnace oxygen enrichment converting method, which comprises the following steps: inserting a converting spray gun with a Laval nozzle into the Kaldo furnace; butting a pure oxygen pipeline with a compressed air pipeline to obtain oxygen-enriched air; adding quartz sand, introducing oxygen-enriched air, reacting at 1100-1200 ℃ for 40-60 min, discharging blowing slag, sampling and testing until the lead content is lower than 5%; introducing oxygen-enriched air, reacting at 1100-1200 ℃ for 120-180 min, discharging blown slag, sampling and testing until the selenium content is lower than 2%; adding 20 kg-80 kg of sodium carbonate, introducing oxygen-enriched air, reacting at 1100-1200 ℃ for 40 min-60 min, discharging the blowing slag, sampling and testing until the contents of selenium, tellurium, lead, antimony and bismuth are all lower than 0.01% and the content of copper is lower than 1.5%. The scheme adopts the pipeline oxygen mixing technology, the pressure reduction is reduced, the flow rate is high, the blowing and jetting area is wide, and the blowing and jetting of the slag layer on the surface of the melt are facilitated; but also can ensure that gold and silver are not oxidized, the influence on the furnace lining is minimized, and the service life of the furnace lining is prolonged.
Description
Technical Field
The invention relates to the technical field of non-ferrous metal smelting, in particular to an oxygen-enriched air refining technology in copper anode mud smelting in a Kaldo furnace.
Background
In the case of smelting copper anode slime in a Kaldo furnace, oxidation blowing is usually carried out using compressed air or pure oxygen.
When the compressed air is used for oxidation converting, the oxygen concentration in the hearth is low, the impurity reaction in unit time of a reaction interface is less, and the oxidation converting speed is low. Meanwhile, a large amount of inert gas contained in the compressed air is blown into the furnace to take away a large amount of heat, and the oxidation reaction rate can be reduced.
When pure oxygen blowing is adopted, a steel cylinder is mostly adopted for direct blowing, and according to the blowing method, after the pure oxygen comes out from a nozzle, the pressure is rapidly reduced, a slag layer on the surface of a melt cannot be blown open, and meanwhile, the oxygen diffusion area is small, so that the problems of small contact area between oxygen and a precious lead melt, low blowing speed and the like exist. In order to ensure that the pure oxygen can smoothly blow off the slag layer, measures of improving the pressure of the pure oxygen and increasing the insertion depth of the blowing gun are generally adopted, so that the oxidation rate of impurities is greatly increased, but the blowing gun is easy to crust, and the gun mouth is easy to block and burn. In addition, because the oxygen concentration in the hearth is high, gold and silver are oxidized to enter slag, so that precious metals are lost, the loss rate of the refractory bricks of the furnace lining is also increased rapidly, the service life of the furnace is greatly reduced, and the corrosivity of the furnace to flue gas purification equipment is also greatly increased.
Disclosure of Invention
The invention aims to provide an oxygen-enriched air refining method for a Kaldo furnace, which can improve the oxidation air refining speed and prolong the service life of equipment.
In order to achieve the purpose, the invention adopts the technical scheme that: an oxygen-enriched converting method for a Kaldo furnace comprises the following steps:
A) inserting a converting spray gun with a laval nozzle into the Kaldo furnace after smelting reduction is finished, wherein an included angle alpha between the center line of a gun body of the converting spray gun and a horizontal plane is 32 degrees, the height H of the laval nozzle from the liquid level of a melt A in the Kaldo furnace is 100 mm-150 mm, an included angle beta between the axis of an air cone sprayed out of the laval nozzle and the liquid level of the melt A is 62 degrees, and the deflection angle phi between the axis of the air cone and the generatrix of the air cone is 3-15 degrees;
B) butt-jointing a pure oxygen pipeline and a compressed air pipeline, controlling the opening of an oxygen regulating valve through a distributed control system, and adjusting the pressure of the oxygen-enriched air to be 250-400 kPa and the oxygen-containing concentration to be 27-35%;
C) adding quartz sand into the Kaldo furnace, spraying the oxygen-enriched air in the step B) into the Kaldo furnace through a converting spray gun at supersonic speed, reacting at the reaction temperature of 1100-1200 ℃ for 40-60 min, discharging converting slag, sampling and testing, and repeating the steps until the content of lead in the melt A is lower than 5%;
D) introducing the oxygen-enriched air in the step B) into a Kaldo furnace, reacting at the reaction temperature of 1100-1200 ℃ for 120-180 min, discharging blown slag, sampling and testing, and repeating the step until the content of selenium in the melt A is lower than 2%;
E) adding 20 kg-80 kg of sodium carbonate into the Kaldo furnace, introducing the oxygen-enriched air in the step B), reacting for 40 min-60 min at the reaction temperature of 1100-1200 ℃, discharging the blowing slag, sampling and testing, and repeating the steps until the content of selenium, tellurium, lead, antimony and bismuth in the melt A is lower than 0.01 percent and the content of copper is lower than 1.5 percent.
The beneficial effect who adopts above-mentioned scheme is: the method adopts a pipeline oxygen mixing technology, utilizes a Laval nozzle to spray oxygen-enriched air with the pressure of 250 kPa-400 kPa and the oxygen-containing concentration of 27% -35% into the Kaldo furnace, and is beneficial to blowing off a slag layer on the surface of a melt and increasing the contact area of the oxygen-enriched air and the melt because the oxygen-enriched air is reduced in pressure, high in flow speed and wide in blowing area after being sprayed out from the Laval nozzle; the proper oxygen concentration of the oxygen-enriched air is selected, so that the oxidation atmosphere in the hearth can be enhanced, the oxidation rate of impurities in unit time is obviously increased, the oxidation blowing speed is increased, and the time of the furnace is obviously shortened by 2 hours; but also can ensure that gold and silver elements are not oxidized, the influence of oxygen-enriched air on the furnace lining is minimized, and the service life of the furnace lining is greatly prolonged.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1;
FIG. 3 is a schematic view of a Laval nozzle of the present invention.
Detailed Description
With the attached drawings, the oxygen-enriched converting method of the Kaldo furnace comprises the following steps:
A) inserting a converting spray gun 10 with a laval nozzle 11 into a Kaldo furnace 20 after finishing smelting reduction, wherein an included angle alpha between the center line of a gun body of the converting spray gun 10 and a horizontal plane is 32 degrees, the height H of the laval nozzle 11 from the liquid level of a melt A in the Kaldo furnace 20 is 100 mm-150 mm, an included angle beta between the axis of an air cone sprayed out of the laval nozzle 11 and the liquid level of the melt A is 62 degrees, and the deflection angle phi between the axis of the air cone and the generatrix of the air cone is 3-15 degrees;
B) butt-jointing a pure oxygen pipeline and a compressed air pipeline, controlling the opening of an oxygen regulating valve through a distributed control system, and adjusting the pressure of the oxygen-enriched air to be 250-400 kPa and the oxygen-containing concentration to be 27-35%;
C) adding quartz sand into the Kaldo furnace 20, spraying the oxygen-enriched air in the step B) into the Kaldo furnace 20 through a converting spray gun 10 at supersonic speed, reacting at the reaction temperature of 1100-1200 ℃ for 40-60 min, discharging converting slag, sampling and testing, and repeating the steps until the content of lead in the melt A is lower than 5%;
D) introducing the oxygen-enriched air in the step B) into the Kaldo furnace 20, reacting at the reaction temperature of 1100-1200 ℃ for 120-180 min, discharging blown slag, sampling and testing, and repeating the step until the content of the selenium element in the melt A is lower than 2%;
E) 20 kg-80 kg of sodium carbonate is added into a Kaldo furnace 20, the oxygen-enriched air in the step B) is introduced, the reaction is carried out for 40 min-60 min at the reaction temperature of 1100 ℃ to 1200 ℃, the blown slag is discharged, the sampling and the assay are carried out, and the steps are repeated until the content of selenium, tellurium, lead, antimony and bismuth in the melt A is lower than 0.01 percent and the content of copper is lower than 1.5 percent.
The core of the invention is that the laval nozzle is used for spraying oxygen-enriched air with the pressure of 250 kPa-400 kPa and the oxygen-containing concentration of 27% -35% into the Kaldo furnace 20, and after the oxygen-enriched air is sprayed out from the laval nozzle in supersonic speed, the pressure is reduced, the flow rate is fast, the blowing area is wide, the slag layer on the surface of the melt can be blown off, and the contact area between the oxygen-enriched air and the melt is increased; the proper oxygen concentration of the oxygen-enriched air is selected, so that the oxidation atmosphere in the hearth can be enhanced, the oxidation rate of impurities in unit time is obviously increased, the oxidation blowing speed is increased, and the time of the furnace is obviously shortened by 2 hours; but also can ensure that gold and silver elements are not oxidized, the influence of oxygen-enriched air on the furnace lining is minimized, and the service life of the furnace lining is greatly prolonged. The oxygen-enriched air is provided by adopting a direct pipeline oxygen mixing technology, and basic facilities such as an oxygen tank, a pressure regulating tank and the like do not need to be added, so that the equipment investment is small; and by adopting a distributed control system, the oxygen concentration is adjusted more accurately, timely and stably, and the oxygen concentration adjusting device is simple and convenient to operate and easy to control.
Preferably, the throat diameter D1 and the outlet diameter D2 of the laval nozzle 11 in the step a) satisfy the following requirements: d1 is more than or equal to 17.5mm and less than or equal to 22mm, D2 is more than or equal to 21.1mm and less than or equal to 26.5mm, D1/D2 is more than or equal to 0.687877 and less than or equal to 0.723558; the flow rate of the laval nozzle 11 is 900Nm3/h～1200Nm3H is used as the reference value. By adopting the Laval nozzle 11 which meets the requirements, when in injection, the oxygen-enriched air is sprayed out from the nozzle at supersonic speed, the expansion is excessive, only oblique shock waves and external expansion waves can be generated, and the deflection angle of the airflow generated by the oblique shock waves is between 3 and 15 degrees, so that the oxygen-enriched air sprayed out from the nozzle can blow off a slag layer on the surface of the melt A, the air injection area is large, the pressure loss is small, and the specific expression is that the impurities in the melt are quickly oxidized, and the converting time is short.
Preferably, the included angle between the tube core of the pure oxygen pipeline and the tube core of the compressed air pipeline in the step B) is 45-90 degrees. Through pure oxygen pipeline and compressed air pipeline butt joint angle to guarantee that can mix between pure oxygen and the compressed air more even.
Preferably, the adding amount of the quartz sand is calculated according to the test result of the previous step when the step C) is repeatedly carried out, and the adding amount of the quartz sand is 1/3 of the lead content in the melt A. Specifically, the calculation formula of the adding amount of the quartz sand is as follows: the addition of quartz sand is silver% copper anode slime x copper anode slime input t ÷ melt silver% x melt lead%/3. The input amount t of the copper anode slime is the initial amount of the copper anode slime input during the smelting reduction of the Kaldo furnace, the silver content of the copper anode slime is the silver content of the copper anode slime input in the initial state, the silver content of the melt is the proportion of silver in the melt left after the completion of the first operation step C), and the lead content of the melt is the proportion of lead in the melt left after the completion of the first operation step C), so that the proportion of silver and lead in the melt needs to be tested during sampling test after the completion of the first operation step C).
The oxygen-rich converting process of the Kaldo furnace of the present invention is further described by way of example below.
The first embodiment is as follows:
butt-jointing the pure oxygen pipeline with the compressed air pipeline at an angle of 90 degrees, and adjusting the pressure of the oxygen-enriched air to 300kPa and the oxygen-containing concentration to 35% by a distributed control system; the selected flow rate is 900Nm3H, the diameter D1 of the throat is 17.5mm, the diameter D2 of the outlet is 21.1mm, the height H of the Laval nozzle 11 from the liquid level of the melt A in the Kaldo furnace 20 is 150mm, the included angle beta between the axis of the gas cone sprayed out of the Laval nozzle 11 and the liquid level of the melt A is 62 degrees, and the deflection angle phi between the axis of the gas cone and the generatrix of the gas cone is 3-15 degrees.
200kg of quartz sand is added into the Kaldo furnace 20, oxygen-enriched air meeting the pressure and the oxygen-containing concentration is introduced into the Kaldo furnace 20 by adopting the Laval nozzle 11, the reaction is carried out for 45min at the reaction temperature of 1150 ℃, blown slag is discharged, a melt sample is taken for assay, and the content of the lead element in the melt is reduced from 20.1 percent to 15.97 percent.
And adding 300kg of quartz sand into the Kaldo furnace 20 again, repeating the previous step, discharging the blowing slag, taking a melt sample for assay, and obtaining the lead element content in the melt which is reduced to 3.58%.
Oxygen-enriched air meeting the pressure and oxygen-containing concentration is continuously introduced into the Kaldo furnace 20, the reaction is carried out for 150min at the reaction temperature of 1150 ℃, blown slag is discharged, and a melt sample is taken for assay, so that the content of selenium in the melt is reduced from 18.7% to 5.36%, and the content of tellurium in the melt is reduced from 13.08% to 4.73%.
Repeating the previous step, controlling the reaction time to be 90min, discharging the blowing slag, taking a melt sample for assay, and obtaining the melt with the selenium content reduced to 1.79% and the tellurium content reduced to 3.43%.
Adding 80kg of sodium carbonate into the Kaldo furnace 20, introducing oxygen-enriched air meeting the pressure and oxygen-containing concentration into the Kaldo furnace 20, reacting at the reaction temperature of 1100 ℃ for 50min, discharging blown slag, taking a melt sample for assay, and obtaining the melt with the content of selenium element of 0.01%, the content of lead element of 0.03%, the content of antimony element of 0.01%, the content of bismuth element of 0.02%, the content of tellurium element of 0.05% and the content of copper element of 1.75%. Repeating the operation for 2 times to obtain the melt, wherein the contents of selenium, lead, antimony, bismuth and tellurium are all reduced to 0.01%, and the content of copper is reduced to 1.4%.
Example two:
butt-jointing the pure oxygen pipeline with the compressed air pipeline at an angle of 90 degrees, and adjusting the pressure of the oxygen-enriched air to 350kPa and the oxygen-containing concentration to 30% by a distributed control system; the selected flow rate is 1000Nm3H, the diameter D1 of the throat is 19mm, the diameter D2 of the outlet is 22.6mm, the height H of the Laval nozzle 11 from the liquid level of the melt A in the Kaldo furnace 20 is 150mm, the included angle beta between the axis of the gas cone sprayed out of the Laval nozzle 11 and the liquid level of the melt A is 62 degrees, and the deflection angle phi between the axis of the gas cone and the generatrix of the gas cone is 3-15 degrees.
200kg of quartz sand is added into the Kaldo furnace 20, oxygen-enriched air meeting the pressure and the oxygen-containing concentration is introduced into the Kaldo furnace 20 by adopting the Laval nozzle 11, the reaction is carried out for 60min at the reaction temperature of 1200 ℃, blown slag is discharged, a melt sample is taken for assay, and the content of the lead element in the melt is reduced from 22.69 percent to 11.23 percent.
And adding 200kg of quartz sand into the Kaldo furnace 20 again, repeating the previous step, discharging the blowing slag, taking a melt sample for assay, and obtaining the lead element content in the melt which is reduced to 3.03 percent.
Oxygen-enriched air meeting the pressure and oxygen-containing concentration is continuously introduced into the Kaldo furnace 20, the reaction is carried out for 180min at the reaction temperature of 1200 ℃, blown slag is discharged, and a melt sample is sampled and tested to obtain the melt with the selenium content reduced from 15.32% to 1.29% and the tellurium content reduced from 13.07% to 6.9%.
Repeating the previous step, controlling the reaction time to be 60min, discharging the blowing slag, taking a melt sample for assay, and obtaining the melt with the selenium content reduced to 0.2% and the tellurium content reduced to 5.51%.
Adding 80kg of sodium carbonate into the Kaldo furnace 20, introducing oxygen-enriched air meeting the pressure and oxygen-containing concentration into the Kaldo furnace 20, reacting at the reaction temperature of 1100 ℃ for 60min, discharging blown slag, taking a melt sample for assay, and obtaining the melt with the content of selenium element of 0.01%, lead element of 0.01%, antimony element of 0.01%, bismuth element of 0.01%, tellurium element of 0.04% and copper element of 2.76%. Repeating the operation for 2 times to obtain that the tellurium content in the melt is reduced from 0.04% to 0.01%, and the copper content is reduced from 2.76% to 1.5%.
Claims (3)
1. An oxygen-enriched converting method of a Kaldo furnace is characterized in that: the method comprises the following steps:
A) inserting a converting spray gun (10) with a laval nozzle (11) into a Kaldo furnace (20) after finishing smelting reduction, wherein an included angle alpha between the center line of a gun body of the converting spray gun (10) and a horizontal plane is 32 degrees, the height H of the laval nozzle (11) from the liquid level of a melt A in the Kaldo furnace (20) is 100-150 mm, an included angle beta between the axis of a gas cone sprayed by the laval nozzle (11) and the liquid level of the melt A is 62 degrees, and the deflection angle between the axis of the gas cone and the generatrix of the gas cone
Is 3 to 15 degrees; the throat diameter D1 and the outlet diameter D2 of the Laval nozzle (11) meet the following requirements: d1 is more than or equal to 17.5mm and less than or equal to 22mm, D2 is more than or equal to 21.1mm and less than or equal to 26.5mm, D1/D2 is more than or equal to 0.687877 and less than or equal to 0.723558; the flow rate of the Laval nozzle (11) is 900Nm3/h～1200Nm3/h；
B) Butt-jointing a pure oxygen pipeline and a compressed air pipeline, controlling the opening of an oxygen regulating valve through a distributed control system, and adjusting the pressure of the oxygen-enriched air to be 250-400 kPa and the oxygen-containing concentration to be 27-35%;
C) adding quartz sand into the Kaldo furnace (20), spraying the oxygen-enriched air in the step B) into the Kaldo furnace (20) through a converting spray gun (10) at supersonic speed, reacting at the reaction temperature of 1100-1200 ℃ for 40-60 min, discharging converting slag, sampling and testing, and repeating the steps until the content of lead in the melt A is lower than 5%;
D) introducing the oxygen-enriched air in the step B) into a Kaldo furnace (20), reacting at the reaction temperature of 1100-1200 ℃ for 120-180 min, discharging blown slag, sampling and testing, and repeating the step until the content of the selenium element in the melt A is lower than 2%;
E) adding 20 kg-80 kg of sodium carbonate into the Kaldo furnace (20), introducing the oxygen-enriched air in the step B), reacting for 40 min-60 min at the reaction temperature of 1100-1200 ℃, discharging the blowing slag, sampling and testing, and repeating the steps until the content of selenium, tellurium, lead, antimony and bismuth in the melt A is lower than 0.01 percent and the content of copper is lower than 1.5 percent.
2. An oxygen-enriched converting method of a Kaldo furnace as claimed in claim 1, characterized in that: the included angle between the tube core of the pure oxygen pipeline and the tube core of the compressed air pipeline in the step B) is 45-90 degrees.
3. An oxygen-enriched converting method of a Kaldo furnace as claimed in claim 1, characterized in that: and C) calculating the adding amount of the quartz sand according to the test result of the previous step when the operation is repeated in the step C), wherein the adding amount of the quartz sand is 1/3 of the lead content in the melt A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910317277.XA CN110055429B (en) | 2019-04-19 | 2019-04-19 | Oxygen-enriched converting method for Kaldo furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910317277.XA CN110055429B (en) | 2019-04-19 | 2019-04-19 | Oxygen-enriched converting method for Kaldo furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110055429A CN110055429A (en) | 2019-07-26 |
| CN110055429B true CN110055429B (en) | 2022-05-03 |
Family
ID=67319763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910317277.XA Active CN110055429B (en) | 2019-04-19 | 2019-04-19 | Oxygen-enriched converting method for Kaldo furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110055429B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111549233B (en) * | 2020-04-03 | 2022-02-01 | 金隆铜业有限公司 | Method for recovering lead and bismuth from copper anode mud smelting slag |
| CN113532795B (en) * | 2021-07-19 | 2023-05-05 | 江西理工大学 | Caldol stove hydraulics experimental apparatus |
| CN114672661A (en) * | 2022-03-04 | 2022-06-28 | 金川集团股份有限公司 | Method for judging precious metal smelting converting end point of Kaldo furnace |
| CN114854998B (en) * | 2022-06-01 | 2024-01-26 | 金川集团股份有限公司 | Carbonylation alloy vulcanization treatment process |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104131170A (en) * | 2014-08-13 | 2014-11-05 | 铜陵有色金属集团股份有限公司金冠铜业分公司 | Smelting process of low-grade scrap copper |
| CN104694767A (en) * | 2015-03-19 | 2015-06-10 | 岑溪市东正动力科技开发有限公司 | Low-grade scrap copper smelting method |
| CN105045104A (en) * | 2015-07-29 | 2015-11-11 | 铜陵有色设计研究院 | Kaldo furnace parameter optimization control method based on fuzzy clustering genetic algorithm |
| CN207828385U (en) * | 2018-02-11 | 2018-09-07 | 紫金铜业有限公司 | Kaldo Furnace handles the device of blowing end point judgement during copper anode mud |
-
2019
- 2019-04-19 CN CN201910317277.XA patent/CN110055429B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104131170A (en) * | 2014-08-13 | 2014-11-05 | 铜陵有色金属集团股份有限公司金冠铜业分公司 | Smelting process of low-grade scrap copper |
| CN104694767A (en) * | 2015-03-19 | 2015-06-10 | 岑溪市东正动力科技开发有限公司 | Low-grade scrap copper smelting method |
| CN105045104A (en) * | 2015-07-29 | 2015-11-11 | 铜陵有色设计研究院 | Kaldo furnace parameter optimization control method based on fuzzy clustering genetic algorithm |
| CN207828385U (en) * | 2018-02-11 | 2018-09-07 | 紫金铜业有限公司 | Kaldo Furnace handles the device of blowing end point judgement during copper anode mud |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110055429A (en) | 2019-07-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110055429B (en) | Oxygen-enriched converting method for Kaldo furnace | |
| JP5894937B2 (en) | Copper anode refining system and method | |
| CN106916966B (en) | A kind of the oxygen-rich oxide method of smelting and its device of antimong-containing material | |
| CN111235388B (en) | Side-top-blown molten pool tin smelting process and smelting furnace | |
| CN112662894B (en) | Method for producing antimony from antimony oxide powder | |
| CN103421958B (en) | Bottom convertor oxygen-enriched air smelting is processed the method for zinc leaching residue | |
| CN105063371A (en) | Method for reducing copper slags in top-blowing converting furnace | |
| CN108359814A (en) | A method of vulcanization Sb-Au ore oxygen enriched molten bath melting | |
| EP2889385B1 (en) | Straight barrel type vacuum refining device and method for use the same | |
| CN107630120B (en) | method for adjusting converter second venturi throat | |
| JP2602573B2 (en) | Metal refining method | |
| CN205821419U (en) | A kind of oxygen-rich copper-smelting device | |
| CN106544526A (en) | A kind of side-blown jet gush-type of bath smelting strengthens stirring means | |
| CN113430388B (en) | Short-flow reduction fuming device and method for liquid lead slag, lead smelting system and method | |
| CN115821064A (en) | Low-temperature reduction method for antimony oxide | |
| CN113234886B (en) | Control method for realizing ultralow iron oxide of converter end-point slag | |
| CN112760449A (en) | Smelting method of slag steel used by Consteel electric furnace | |
| JPH0233779B2 (en) | ||
| CN116287711A (en) | Smelting method and equipment for continuous blowing and refining of cupronickel sulfonium | |
| CN216427375U (en) | Copper smelting device | |
| CN107502754B (en) | Production method of blister copper | |
| JP4419594B2 (en) | Hot metal refining method | |
| CN112680558B (en) | Method for extracting vanadium from low-silicon vanadium-containing molten iron | |
| JP4477580B2 (en) | Copper production method by dry smelting in converter | |
| CN106282598A (en) | A kind of control sulfur nitrating refinery practice |
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 |