CN113981240A - Oxygen-enriched bottom blowing copper smelting process and copper smelting device thereof - Google Patents
Oxygen-enriched bottom blowing copper smelting process and copper smelting device thereof Download PDFInfo
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- CN113981240A CN113981240A CN202111242921.5A CN202111242921A CN113981240A CN 113981240 A CN113981240 A CN 113981240A CN 202111242921 A CN202111242921 A CN 202111242921A CN 113981240 A CN113981240 A CN 113981240A
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 127
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 126
- 239000010949 copper Substances 0.000 title claims abstract description 126
- 238000007664 blowing Methods 0.000 title claims abstract description 97
- 238000003723 Smelting Methods 0.000 title claims abstract description 86
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 79
- 239000001301 oxygen Substances 0.000 title claims abstract description 79
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 79
- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000008569 process Effects 0.000 title claims abstract description 22
- 239000002893 slag Substances 0.000 claims abstract description 38
- 239000007789 gas Substances 0.000 claims abstract description 34
- 238000007599 discharging Methods 0.000 claims abstract description 31
- 239000007788 liquid Substances 0.000 claims description 44
- 239000000463 material Substances 0.000 claims description 42
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 20
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 17
- 239000006004 Quartz sand Substances 0.000 claims description 15
- 238000002844 melting Methods 0.000 claims description 15
- 230000008018 melting Effects 0.000 claims description 15
- 239000000779 smoke Substances 0.000 claims description 11
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 10
- 239000000292 calcium oxide Substances 0.000 claims description 10
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 10
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 230000007246 mechanism Effects 0.000 claims description 7
- 230000008859 change Effects 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000009867 copper metallurgy Methods 0.000 claims description 2
- 238000010079 rubber tapping Methods 0.000 claims 1
- 239000012535 impurity Substances 0.000 abstract description 10
- 230000003647 oxidation Effects 0.000 abstract description 5
- 238000007254 oxidation reaction Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 3
- 230000004907 flux Effects 0.000 abstract description 3
- 238000005272 metallurgy Methods 0.000 abstract description 2
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 239000002283 diesel fuel Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012768 molten material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000009853 pyrometallurgy Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
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
-
- 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
- C22B15/006—Pyrometallurgy working up of molten copper, e.g. refining
-
- 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 an oxygen-enriched bottom blowing copper smelting process and a copper smelting device thereof, and relates to the technical field of metallurgy. The process comprises four steps of initial converting, middle converting, later converting and copper discharging, and the process ensures that impurities in later-stage slag of the copper dross smelting furnace can fully contact with oxygen in bottom-blown gas to fully react by controlling the oxygen content of bottom-blown gas blown into a copper smelting device in each converting stage and matching with different copper smelting fluxes in each converting stage and different converting temperatures, thereby realizing better oxidation impurity removal effect.
Description
Technical Field
The invention relates to the technical field of metallurgy, in particular to an oxygen-enriched bottom blowing copper smelting process and a copper smelting device thereof.
Background
The smelting technology of copper is mainly pyrometallurgy, which generally includes the steps of carrying out matte smelting on a copper-containing material in a closed blast furnace, an electric furnace or a flash furnace, and then feeding the produced molten matte into a converter for converting to obtain blister copper. When the smelting raw material is a copper-containing material, smelting can be carried out in various forms of a copper converter burning diesel oil, a small blast furnace or a bottom blowing furnace. Wherein, the copper converter of burning diesel oil, what adopt is that diesel oil provides the energy, carries out the copper smelting through the end burning, and air-blower and steel pipe input air, the converting in-process will lead to the steel pipe that has compressed air at the fire door through the workman and insert the copper liquid, from top to bottom, send into the copper liquid with the air to with the impurity oxidation slagging scorification in the copper liquid. In the process, the angle of the air compression pipe needs to be manually adjusted to oxidize and slagging all impurities in the molten copper as fast as possible. However, the operation process is not only dangerous due to high temperature, but also the air compression pipe is adjusted manually, which is not ideal for removing impurities in the copper liquid by oxidation, and the blowing efficiency is low. Moreover, the air compression pipe has serious loss due to high temperature in the molten copper, and the production cost of enterprises is increased.
Disclosure of Invention
Aiming at the technical problems, the invention provides an oxygen-enriched bottom blowing copper smelting process, which is characterized in that the oxygen content of bottom blowing gas blown into a copper smelting device in each blowing stage is controlled, different copper smelting fluxes in each blowing stage are matched, and different blowing temperatures are matched, so that impurities in later-stage slag of a copper scum smelting furnace can be fully contacted with oxygen in the bottom blowing gas to fully react, and a better oxidation impurity removal effect is realized.
The invention provides an oxygen-enriched bottom blowing copper smelting process, which comprises the following steps:
first-stage blowing: taking the later-stage slag of a copper dross smelting furnace to be treated as a first-stage material, adding the later-stage slag into a copper smelting device, adding quartz sand, igniting and heating to a first preset melting temperature, melting the first-stage material into molten liquid, adjusting the melting temperature to the first preset converting temperature when the liquid level height of the molten liquid reaches a preset value, continuously blowing a first bottom blowing gas with preset oxygen content into the copper smelting device from the bottom of the copper smelting device by using an oxygen lance, performing first-stage converting, and discharging converting slag;
middle-stage blowing: taking later-stage slag of a copper dross smelting furnace to be treated as a middle-stage material, adding the middle-stage material into the copper smelting device, adding quartz sand, adjusting the converting temperature to a second preset converting temperature, melting the middle-stage material into molten liquid, continuously blowing a second bottom blowing gas with a preset oxygen content into the copper smelting device from the bottom of the copper smelting device by using the oxygen lance, performing middle-stage converting, and discharging converting slag; repeating the middle-stage converting step until the preset converting material is fed;
and (3) blowing in the later stage: adding calcium oxide and sodium carbonate into the copper smelting device, adjusting the converting temperature to a third preset converting temperature, continuously blowing a third bottom blowing gas with preset oxygen content into the copper smelting device from the bottom of the copper smelting device by using the oxygen lance, performing later converting, and discharging converting slag;
copper discharging: and when blowing slag is discharged in later stage blowing, taking the molten liquid in the copper smelting device, monitoring the copper grade in the molten liquid, adjusting the blowing temperature to a preset copper discharge temperature when the copper grade in the molten liquid reaches more than 95%, and discharging the molten liquid, namely the molten copper liquid.
In one embodiment, the ratio of the quartz sand, the calcium oxide and the sodium carbonate in parts by weight is:
8-10 parts of quartz sand
1-2 parts of calcium oxide
6-8 parts of sodium carbonate;
the ratio of the sum of the parts by weight of the quartz sand, the calcium oxide and the sodium carbonate to the predetermined converting material is 1: 9-165.
In one embodiment, the oxygen content of the first bottom-blown gas is 1-40%, the oxygen content of the second bottom-blown gas is 25-40%, and the oxygen content of the third bottom-blown gas is 20-25%.
In one embodiment, the oxygen content of the first bottom-blown gas is 25% -30%, the oxygen content of the second bottom-blown gas is 25% -30%, and the oxygen content of the third bottom-blown gas is 20% -25%.
In one embodiment, the first predetermined melting temperature is 1100-1400 ℃, the first predetermined converting temperature is 1050-1250 ℃, the second predetermined converting temperature is 1100-1350 ℃, the third predetermined converting temperature is 1050-1250 ℃, and the predetermined copper releasing temperature is 1000-1200 ℃.
In one embodiment, in the first stage converting step, the included angle between the axial direction of the oxygen lance and the horizontal direction is a bottom blowing angle, the bottom blowing angle is 15-75 degrees, and the change speed of the bottom blowing angle is increased by 3-8 degrees every half hour.
In one embodiment, the rate of change of the bottom blowing angle is increased by 5 ° every half hour.
In one embodiment, the mass ratio of the amount of the first-stage material to the amount of the single feed of the medium-stage material is 2-8: 1.
The invention also provides a copper smelting device, which comprises:
the furnace body is internally provided with a furnace chamber, the furnace body is provided with a burner assembly, a material port, a smoke outlet, a throat and a plurality of oxygen lance holes arranged on the furnace body, the furnace body is connected with a rotating mechanism through a gear, the rotating mechanism is used for driving the furnace body to rotate, and the throat is connected with a settling chamber; and
and the oxygen lance is inserted into the oxygen lance hole and is used for continuously blowing bottom blowing gas into the furnace chamber.
In one embodiment, the furnace body is a cylindrical container, a smoke hood is arranged above the smoke exhaust port, a copper-discharging slag-discharging runner is arranged below the smoke exhaust port, and the smoke hood and the copper-discharging slag-discharging runner are both cooled by a cooler.
In one embodiment, the burner assembly comprises: the burner comprises a burner opening, a burner and a burner water jacket, wherein the burner is arranged in the burner opening, the burner is detachably connected with the burner opening, the included angle between the burner and the horizontal direction is 10-20 degrees, the burner water jacket is sleeved on the burner opening, and the burner water jacket is cooled by a cooler.
In one embodiment, the cooler is cooled by circulating cooling water.
In one embodiment, the included angle between the axial direction of the oxygen lance and the vertical direction is 15-110 degrees.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides an oxygen-enriched bottom blowing copper smelting process, which ensures that impurities in later-stage slag of a copper dross smelting furnace can fully contact with oxygen in bottom blowing gas for full reaction by controlling the oxygen content of bottom blowing gas blown into a copper smelting device in each blowing stage, matching with different copper smelting fluxes in each blowing stage and different blowing temperatures. The invention also provides a copper smelting device, wherein oxygen-rich gas is added into the copper smelting device from bottom to top through the oxygen lance, and is fully contacted with impurities in copper liquid through small and uniformly distributed oxygen-rich bubbles, so that a better oxidation impurity removal effect is realized.
Drawings
FIG. 1 is a plan view of a copper metallurgy apparatus according to example 1; wherein 100 is a furnace body, 200 is a rotating mechanism, 300 is a settling chamber, 400 is an oxygen lance, 500 is a copper-discharging slag-discharging launder, 111 is a burner mouth, 120 is a material mouth, 130 is a throat mouth, and 140 is an oxygen lance hole.
FIG. 2 is a cross-sectional view of the copper smelting apparatus in example 1, wherein 400 is a lance.
FIG. 3 is a left side view of the copper smelting apparatus in example 1, wherein 120 is a material port, 130 is a throat, 400 is an oxygen lance, 500 is a copper-discharging slag-discharging launder, and 600 is a hood.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "coupled" to another element, it can be directly coupled to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Defining:
the blowing of the invention: refers to a process of pyrometallurgical operation, usually carried out in a converter.
Quartz sand: is quartz particles formed by crushing and processing quartz stones.
Melting liquid: refers to a melt formed from two or more metals.
Blowing slag: refers to the slag produced during converter blowing.
Grade: refers to the content of useful components or useful minerals in the ore (or beneficiation product).
And (3) burner: a ring-shaped pipe air inlet burner is a general name of a device which sprays fuel and air in a certain mode, mixes (or sprays) and burns.
Later-stage slag of the copper dross smelting furnace: the copper dross is treated by a dross smelting furnace and then stands for layering, and the copper-containing material is later-stage slag generated between earlier-stage slag and crude lead due to density.
Reagents, materials and equipment used in the embodiment are all commercially available sources unless otherwise specified; unless otherwise specified, all the experimental methods are routine in the art.
Example 1
An oxygen-enriched bottom blowing copper smelting process.
The oxygen-enriched bottom blowing copper smelting process comprises the following steps:
first-stage blowing: taking the later-stage slag of a copper dross smelting furnace to be treated as a first-stage material, adding the later-stage slag into a copper smelting device, adding quartz sand, igniting and heating to a first preset melting temperature, melting the first-stage material into molten liquid, adjusting the melting temperature to the first preset converting temperature when the liquid level height of the molten liquid reaches a preset value, continuously blowing a first bottom blowing gas with preset oxygen content into the copper smelting device from the bottom of the copper smelting device by using an oxygen lance, performing first-stage converting, and discharging converting slag;
middle-stage blowing: taking later-stage slag of a copper dross smelting furnace to be treated as a middle-stage material, adding the middle-stage material into the copper smelting device, adding quartz sand, adjusting the converting temperature to a second preset converting temperature, melting the middle-stage material into molten liquid, continuously blowing a second bottom blowing gas with a preset oxygen content into the copper smelting device from the bottom of the copper smelting device by using the oxygen lance, performing middle-stage converting, and discharging converting slag; repeating the middle-stage converting step until the preset converting material is fed;
and (3) blowing in the later stage: adding calcium oxide and sodium carbonate into the copper smelting device, adjusting the converting temperature to a third preset converting temperature, continuously blowing a third bottom blowing gas with preset oxygen content into the copper smelting device from the bottom of the copper smelting device by using the oxygen lance, performing later converting, and discharging converting slag;
copper discharging: and when blowing slag is discharged in later stage blowing, taking the molten liquid in the copper smelting device, monitoring the copper grade in the molten liquid, adjusting the blowing temperature to a preset copper discharge temperature when the copper grade in the molten liquid reaches more than 95%, and discharging the molten liquid, namely the molten copper liquid.
The preset converting material is the sum of the first-stage material and the middle-stage material, and the feeding amount of the preset converting material is adjusted according to the size of the copper smelting device.
The copper smelting device is shown in a plan view in FIG. 1, a cross section in FIG. 2 and a left side view in FIG. 3, and comprises:
the furnace comprises a furnace body 100, wherein a furnace chamber is arranged in the furnace body 100, a burner nozzle assembly, a material port 120, a smoke outlet, a throat 130 and a plurality of oxygen lance holes 140 are arranged on the furnace body, the furnace body is connected with a rotating mechanism 200 through a gear, the rotating mechanism 200 is used for driving the furnace body to rotate, and the throat 130 is connected with a settling chamber 300; and
and an oxygen lance 400 inserted into the oxygen lance hole 140 for continuously blowing bottom blowing gas into the furnace chamber.
In the embodiment, in the first stage converting step, 26-28t of the later stage slag of the copper dross smelting furnace to be processed is taken and sent into a copper smelting device through a conveying belt, 500kg of quartz sand is added, after the charging is finished, the furnace mouth of the converter is rotated to a horizontal angle, the molten material is ignited, the temperature is raised to 1150-1350 ℃, the later stage slag of the copper dross smelting furnace is melted into molten liquid, when the liquid level height of the molten liquid reaches a preset value of 10cm, the temperature is adjusted to 1100-1200 ℃, oxygen-rich bottom blowing gas is continuously blown into the device from the bottom of the copper smelting device by an oxygen lance, and the oxygen concentration of the bottom blowing gas is controlled to be 26-29%. The included angle between the axial direction of the air injection of the oxygen lance and the horizontal direction is a bottom blowing angle, in the embodiment, when blowing is started, the direction of the oxygen lance is adjusted to ensure that the bottom blowing angle is 45 degrees, the bottom blowing angle is gradually increased according to the height change of the liquid level of molten liquid in the blowing process, the bottom blowing angle is increased by 5 degrees every half hour, materials which are not melted at the bottom of the furnace are stirred until all the materials are completely melted, primary blowing is carried out, then the furnace body is rotated to be horizontal at a furnace mouth, the solution is kept still for 10-15min, the furnace body is rotated to be inclined downwards at a certain angle at the furnace mouth, and blown slag is discharged after being aligned to a launder;
in the middle stage converting step, 3-5t of later stage slag of the copper dross smelting furnace to be processed is taken each time and is sent into the copper smelting device through a conveying belt, the feeding amount of a single furnace is determined according to the liquid level of melt in the furnace, the liquid level of the melt is generally controlled not to exceed about 90cm, the total feeding amount of the single furnace is controlled to be 85t-90t, then the whole feeding can be completed, 100-plus-material of quartz sand is added, middle stage converting is carried out while feeding, the temperature is adjusted to 1150-plus-material 1300 ℃, oxygen-rich bottom-blown gas is continuously blown into the device from the bottom of the copper smelting device by an oxygen lance, and the oxygen concentration of the bottom-blown gas is controlled to be 26-29 percent. Frequently observing a copper smelting device, checking whether liquid flows out or not, immediately stopping feeding if the liquid flows out, timely cleaning before solidification, simultaneously performing middle-stage blowing, then rotating a furnace body to be horizontal to a furnace mouth, standing the solution for 10-15min, rotating the furnace body to be inclined downwards by a certain angle until the furnace mouth is aligned to a launder, and discharging blowing slag;
in the later stage converting step, 75kg-125kg of calcium oxide and 50kg-150kg of sodium carbonate are added into a furnace mouth, the temperature is adjusted to 1100-1200 ℃, oxygen-rich bottom-blown gas is continuously blown into the device from the bottom of the copper smelting device by an oxygen lance, and the oxygen concentration of the bottom-blown gas is controlled to be about 21 percent. Performing later blowing, then rotating the furnace body to the furnace mouth level, standing the solution for 10-15min, rotating the furnace body to the furnace mouth to incline downwards at a certain angle, aligning to a launder, and discharging blown slag;
in the copper discharging step, when blowing slag is discharged in later-stage hammering, sampling and observing metal in the furnace, and performing copper discharging operation when the later-stage blowing requires that the blowing is performed until the grade of crude copper reaches more than 96%, adjusting the temperature to 1000-1150 ℃, and discharging molten liquid in the furnace to obtain molten copper liquid.
In this embodiment, the cooler is cooled by circulating cooling water.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. An oxygen-enriched bottom blowing copper smelting process is characterized by comprising the following steps:
first-stage blowing: taking the later-stage slag of a copper dross smelting furnace to be treated as a first-stage material, adding the later-stage slag into a copper smelting device, adding quartz sand, igniting and heating to a first preset melting temperature, melting the first-stage material into molten liquid, adjusting the melting temperature to the first preset converting temperature when the liquid level height of the molten liquid reaches a preset value, continuously blowing a first bottom blowing gas with preset oxygen content into the copper smelting device from the bottom of the copper smelting device by using an oxygen lance, performing first-stage converting, and discharging converting slag;
middle-stage blowing: taking later-stage slag of a copper dross smelting furnace to be treated as a middle-stage material, adding the middle-stage material into the copper smelting device, adding quartz sand, adjusting the converting temperature to a second preset converting temperature, melting the middle-stage material into molten liquid, continuously blowing a second bottom blowing gas with a preset oxygen content into the copper smelting device from the bottom of the copper smelting device by using the oxygen lance, performing middle-stage converting, and discharging converting slag; repeating the middle-stage converting step until the preset converting material is fed;
and (3) blowing in the later stage: adding calcium oxide and sodium carbonate into the copper smelting device, adjusting the converting temperature to a third preset converting temperature, continuously blowing a third bottom blowing gas with preset oxygen content into the copper smelting device from the bottom of the copper smelting device by using the oxygen lance, performing later converting, and discharging converting slag;
copper discharging: and when blowing slag is discharged in later stage blowing, taking the molten liquid in the copper smelting device, monitoring the copper grade in the molten liquid, adjusting the blowing temperature to a preset copper discharge temperature when the copper grade in the molten liquid reaches more than 95%, and discharging the molten liquid, namely the molten copper liquid.
2. An oxygen-enriched bottom blowing copper process according to claim 1, wherein the ratio of the quartz sand, the calcium oxide and the sodium carbonate in parts by weight is:
8-10 parts of quartz sand
1-2 parts of calcium oxide
6-8 parts of sodium carbonate;
the ratio of the sum of the parts by weight of the quartz sand, the calcium oxide and the sodium carbonate to the predetermined converting material is 1: 9-165.
3. An oxygen-enriched bottom-blown copper process according to claim 1, wherein the oxygen content of the first bottom-blown gas is between 1% and 40%, the oxygen content of the second bottom-blown gas is between 25% and 40%, and the oxygen content of the third bottom-blown gas is between 20% and 25%.
4. An oxygen-enriched bottom blowing copper process according to claim 1, wherein the first predetermined melting temperature is 1100-1400 ℃, the first predetermined blowing temperature is 1050-1250 ℃, the second predetermined blowing temperature is 1100-1350 ℃, the third predetermined blowing temperature is 1050-1250 ℃, and the predetermined copper tapping temperature is 1000-1200 ℃.
5. An oxygen-enriched bottom-blown copper process according to claim 1, wherein in the first-stage blowing step, the included angle between the axial direction and the horizontal direction of the oxygen lance is a bottom-blowing angle, the bottom-blowing angle is 15-75 degrees, and the change speed of the bottom-blowing angle is increased by 3-8 degrees every half hour.
6. An oxygen-enriched bottom blowing copper process according to claim 1, characterized in that the mass ratio of the first stage material quantity to the single feeding quantity of the middle stage material is 2-8: 1.
7. The copper smelting device in the oxygen-enriched bottom blowing copper smelting process of any one of the claims 1 to 6, which is characterized by comprising the following components:
the furnace body is internally provided with a furnace chamber, the furnace body is provided with a burner assembly, a material port, a smoke outlet, a throat and a plurality of oxygen lance holes arranged on the furnace body, the furnace body is connected with a rotating mechanism through a gear, the rotating mechanism is used for driving the furnace body to rotate, and the throat is connected with a settling chamber; and
and the oxygen lance is inserted into the oxygen lance hole and is used for continuously blowing bottom blowing gas into the furnace chamber.
8. A copper smelting device according to claim 7, wherein the furnace body is a cylindrical container, a smoke hood is arranged above the smoke exhaust port, a copper and slag discharging launder is arranged below the smoke exhaust port, and the smoke hood and the copper and slag discharging launder are both cooled by a cooler.
9. A copper metallurgy apparatus according to claim 7, wherein the burner assembly comprises: the burner comprises a burner opening, a burner and a burner water jacket, wherein the burner is arranged in the burner opening, the burner is detachably connected with the burner opening, the included angle between the burner and the horizontal direction is 10-20 degrees, the burner water jacket is sleeved on the burner opening, and the burner water jacket is cooled by a cooler.
10. A copper smelting plant according to claim 7 wherein the angle between the axial direction of the lance jets and the vertical direction is between 15 ° and 110 °.
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| CN202111242921.5A CN113981240B (en) | 2021-10-25 | 2021-10-25 | Oxygen-enriched bottom blowing copper smelting process and copper smelting device thereof |
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| CN202111242921.5A CN113981240B (en) | 2021-10-25 | 2021-10-25 | Oxygen-enriched bottom blowing copper smelting process and copper smelting device thereof |
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| CN113981240B CN113981240B (en) | 2023-10-24 |
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Citations (6)
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| JPH08218128A (en) * | 1995-02-14 | 1996-08-27 | Nikko Kinzoku Kk | Method for smelting copper |
| CN101165196A (en) * | 2006-10-19 | 2008-04-23 | 中国恩菲工程技术有限公司 | Technique for continuously smelting copper by employing oxygen bottom converter and device thereof |
| CN101328543A (en) * | 2006-10-19 | 2008-12-24 | 中国恩菲工程技术有限公司 | Oxygen bottom blowing continuous copper smelting apparatus |
| CN102181661A (en) * | 2011-04-15 | 2011-09-14 | 东营鲁方金属材料有限公司 | Copper smelting device and process |
| BR212015029863U2 (en) * | 2013-05-31 | 2016-08-16 | Shandong Fangyuan Non Ferrous Science And Technology Ltd Company | oxygen enriched lower blow copper smelting furnace |
| CN107699702A (en) * | 2017-10-10 | 2018-02-16 | 东北大学 | A kind of method that valuable component is reclaimed by cupric slag |
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2021
- 2021-10-25 CN CN202111242921.5A patent/CN113981240B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08218128A (en) * | 1995-02-14 | 1996-08-27 | Nikko Kinzoku Kk | Method for smelting copper |
| CN101165196A (en) * | 2006-10-19 | 2008-04-23 | 中国恩菲工程技术有限公司 | Technique for continuously smelting copper by employing oxygen bottom converter and device thereof |
| CN101328543A (en) * | 2006-10-19 | 2008-12-24 | 中国恩菲工程技术有限公司 | Oxygen bottom blowing continuous copper smelting apparatus |
| CN102181661A (en) * | 2011-04-15 | 2011-09-14 | 东营鲁方金属材料有限公司 | Copper smelting device and process |
| BR212015029863U2 (en) * | 2013-05-31 | 2016-08-16 | Shandong Fangyuan Non Ferrous Science And Technology Ltd Company | oxygen enriched lower blow copper smelting furnace |
| CN107699702A (en) * | 2017-10-10 | 2018-02-16 | 东北大学 | A kind of method that valuable component is reclaimed by cupric slag |
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| CN113981240B (en) | 2023-10-24 |
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