CN115852166B - Method for smelting metallized nickel matte through nickel concentrate oxygen enrichment - Google Patents
Method for smelting metallized nickel matte through nickel concentrate oxygen enrichment Download PDFInfo
- Publication number
- CN115852166B CN115852166B CN202211693795.XA CN202211693795A CN115852166B CN 115852166 B CN115852166 B CN 115852166B CN 202211693795 A CN202211693795 A CN 202211693795A CN 115852166 B CN115852166 B CN 115852166B
- Authority
- CN
- China
- Prior art keywords
- nickel
- oxygen
- slag
- spraying
- matte
- 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
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 title claims abstract description 276
- 229910052759 nickel Inorganic materials 0.000 title claims abstract description 137
- 239000001301 oxygen Substances 0.000 title claims abstract description 64
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 64
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 63
- 239000012141 concentrate Substances 0.000 title claims abstract description 50
- 238000003723 Smelting Methods 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 37
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 52
- 229910052742 iron Inorganic materials 0.000 claims abstract description 26
- 239000007921 spray Substances 0.000 claims description 59
- 239000002893 slag Substances 0.000 claims description 53
- 238000005507 spraying Methods 0.000 claims description 38
- 238000007664 blowing Methods 0.000 claims description 22
- 229910052717 sulfur Inorganic materials 0.000 claims description 18
- 239000003638 chemical reducing agent Substances 0.000 claims description 17
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 15
- 229910052802 copper Inorganic materials 0.000 claims description 15
- 125000000864 peroxy group Chemical group O(O*)* 0.000 claims description 15
- 239000011593 sulfur Substances 0.000 claims description 15
- 239000007789 gas Substances 0.000 claims description 14
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 13
- 230000004907 flux Effects 0.000 claims description 12
- 239000000126 substance Substances 0.000 claims description 9
- 239000003245 coal Substances 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 6
- 230000001276 controlling effect Effects 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 230000007935 neutral effect Effects 0.000 claims description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 2
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 claims description 2
- 239000003830 anthracite Substances 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 claims description 2
- 230000007797 corrosion Effects 0.000 claims description 2
- 239000003077 lignite Substances 0.000 claims description 2
- 230000002035 prolonged effect Effects 0.000 claims description 2
- 239000010453 quartz Substances 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 2
- 238000006477 desulfuration reaction Methods 0.000 abstract description 7
- 230000023556 desulfurization Effects 0.000 abstract description 7
- 238000005266 casting Methods 0.000 abstract description 2
- 239000010949 copper Substances 0.000 description 17
- 238000006243 chemical reaction Methods 0.000 description 15
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 12
- 238000002844 melting Methods 0.000 description 7
- 230000008018 melting Effects 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 7
- 238000001465 metallisation Methods 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000007254 oxidation reaction Methods 0.000 description 6
- 230000003647 oxidation Effects 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 4
- 230000003009 desulfurizing effect Effects 0.000 description 4
- 239000000155 melt Substances 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 230000001590 oxidative effect Effects 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 229910000570 Cupronickel Inorganic materials 0.000 description 2
- YOCUPQPZWBBYIX-UHFFFAOYSA-N copper nickel Chemical compound [Ni].[Cu] YOCUPQPZWBBYIX-UHFFFAOYSA-N 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005868 electrolysis reaction Methods 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000002926 oxygen Chemical class 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- 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 provides a method for smelting metallized nickel matte by using nickel concentrate in an oxygen-enriched manner, which aims at the process of smelting and casting a nickel anode plate by using a secondary nickel concentrate reverberatory furnace, and provides a short-flow desulfurization and iron removal treatment process.
Description
Technical Field
The invention belongs to the technical field of metal smelting, and relates to a method for smelting metallized nickel matte by enriching oxygen in nickel concentrate.
Background
The copper-nickel concentrate is smelted to obtain low-nickel matte, the low-nickel matte is blown by a converter to obtain high-nickel matte, the high-nickel matte is slowly cooled and crushed, and the nickel concentrate, the copper concentrate and the primary alloy are obtained through mineral separation, wherein the nickel concentrate obtained through mineral separation is called secondary nickel concentrate. The smelting and casting process of the conventional nickel anode plate is to melt the secondary nickel concentrate by a reverberatory furnace to produce the iron-containing high-sulfur nickel anode plate, and the process only completes the melting of the secondary nickel concentrate by the reverberatory furnace, does not generate desulfurization and iron-removing metallurgical physicochemical reactions of the secondary nickel concentrate, and the produced nickel anode plate has high sulfur content and small iron content, so that the nickel anode plate has low nickel grade, low plate yield, high fragile anode scrap rate, high energy consumption of an electrolysis process and low productivity.
The invention patent CN111961880A 'method for producing a metallized nickel anode plate by using a bottom blowing furnace' discloses a method for producing a metallized nickel anode plate by using the bottom blowing furnace to spray oxygen-enriched gas into a furnace body from the bottom of the furnace to finish the melting and desulfurization processes of secondary nickel concentrate. The patent discloses a mode of continuously discharging nickel matte and intermittently discharging slag by mainly adopting bottom blowing oxygen-enriched gas. The lance disclosed in this patent has a problem of a low service life in that it sprays gas from the bottom of the furnace.
The invention discloses a horizontal furnace type device for producing a metallized anode plate by using an oxygen-enriched combustion furnace, which is disclosed in the patent CN113251799A, wherein secondary nickel concentrate is smelted by using oxygen-enriched oxygen, and melting, desulfurizing and deironing reactions are completed in one furnace body to produce the metallized nickel anode plate. The patent discloses a horizontal furnace type mainly, which adopts a mode of intermittent discharge and periodic operation.
The invention patent CN 112593093B 'nickel smelting device and method' and the invention patent CN111101001A 'one-step nickel smelting system and method' disclose a molten pool smelting device or system, comprising a depletion zone, a depletion zone and an electric furnace sedimentation zone, by which nickel concentrate can be treated to directly produce high nickel matte or metallized high nickel matte, which is rich in nickel, copper and sulfur. Compared with the patent, the oxygen-enriched converting of the secondary nickel concentrate is aimed at by the treatment material of the patent, and the output is metallized high-nickel matte, wherein the main content is nickel and sulfur, and the iron content is less than about 2%. Copper-containing nickel matte converting is obviously different from copper-free nickel matte converting due to different physical and chemical properties of oxides in the copper and nickel converting processes. Copper matte converting is mainly liquid-liquid reaction, while nickel matte converting is mainly liquid-solid reaction. Therefore, in the blowing process of copper-free nickel matte, nickel is easily oxidized into NiO according to different blowing temperatures, so that the NiO content in slag is increased sharply. In the process of converting high nickel matte without copper nickel matte, special attention is paid to the oxidation transition temperature points of nickel and sulfur.
The main difference between copper matte and nickel matte converting is:
(1) Copper matte converting is mainly liquid-liquid reaction, cu 2 S and Cu have smaller mutual solubility, the molten pool is divided into two layers, and the upper layer is Cu containing a small amount of copper 2 S layer, lower layer containing small amount of Cu 2 S copper layer, although the metal copper content is continuously increased during converting, cu 2 The S content is continuously reduced, but the contact with the blowing oxygen is still Cu with the sulfur content being basically unchanged 2 And S layer, which basically ensures the stable proceeding of metallurgical physical and chemical reaction in the copper matte converting process.
(2) The blowing of nickel matte is mainly liquid-solid reaction, nickel is easily oxidized into NiO, niO has a very high melting point (1984 ℃), is solid at the conventional blowing temperature and blowing system, and the melt belongs to the solid-liquid reaction, so that the reaction is difficult to carry out. Ni in copper matte 3 S 2 The metal nickel is fully mutually dissolved with Ni, the metal nickel is continuously increased during blowing, and the sulfur concentration in the melt is continuously reduced, so that the metallurgical physicochemical reaction in the melt in the nickel matte blowing process has fluctuation. The continuous increase of NiO content in slag is easy to cause problems of dry slag and even furnace shutdown, and oxidized nickel needs to be reduced into a nickel matte layer with a metal nickel sedimentation value in time, so that metallized nickel matte is produced, and the grade of the metallized nickel matte can be improved.
The blowing temperature of the nickel matte needs to be controlled, namely, the sulfur in the nickel matte is guaranteed to be oxidized in preference to the nickel. Generally, nickel matte converting temperatures increase with decreasing sulfur content.
Compared with the patent, the method adopts the oxygen-enriched smelting furnace to continuously process the secondary nickel concentrate to produce the metallized nickel anode plate, and the patent requires controlling the smelting temperature to reduce the oxidation degree of nickel and timely reduces the slag so as to improve the metallization degree of the high nickel matte.
In order to solve the problems, the production of the high-sulfur nickel anode product is converted into the production of the metallized nickel anode plate product, and in order to improve the heat utilization rate and the efficiency, the oxygen-enriched furnace is adopted to smelt secondary nickel concentrate, so that the secondary nickel concentrate completes the reactions of smelting, desulfurizing, deironing and the like in one furnace body to produce the metallized nickel anode plate, and the aim of deironing and reducing sulfur is achieved. The process has the characteristics of high reaction heat efficiency, good operation environment, short process flow, high yield of the metallized anode plate, low electrolysis energy consumption of the metallized nickel anode plate and the like.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention provides a method for smelting metallized nickel matte by enriched oxygen of nickel concentrate, which solves the problems of low metallization rate, low heat utilization rate and high anode scrap rate of a nickel anode plate smelted by a reverberatory furnace in the traditional process, and can achieve the purposes of short process, low energy consumption and high efficiency in producing metallized anode plates.
For this purpose, the invention adopts the following technical scheme:
a method for oxygen-enriched smelting of metallized nickel matte from nickel concentrate, comprising the following steps:
a. a converting area and a depletion area which are communicated are arranged in an oxygen-enriched smelting furnace, a plurality of first spray guns are arranged in the converting area, a plurality of second spray guns are arranged in the depletion area, the first spray guns are used for spraying oxygen-enriched gas, the oxygen-enriched concentration is 65% -80% and the peroxy coefficient is 1-1.3, the second spray guns are used for spraying neutral gas, the oxygen-enriched concentration is 50% -65% and the peroxy coefficient is 0.8-1, and part of spray guns can be arranged in the second spray guns to be pulverized coal spraying charging guns;
b. a first feed inlet and a second feed inlet are arranged at the top of an oxygen-enriched smelting furnace, the horizontal position of the first feed inlet is higher than that of the second feed inlet, the first feed inlet and a converting area are exactly in the same vertical line, the second feed inlet and a depletion area are exactly in the same vertical line, then, secondary nickel concentrate is added with iron-removing slag-forming flux, the secondary nickel concentrate enters the furnace through the first feed inlet, the adding mass of the iron-removing slag-forming flux is 0.5% -3% of the mass of the secondary nickel concentrate, and a carbonaceous reducing agent is added into the depletion area through the second feed inlet or through blowing by a second spray gun, and the adding mass of the carbonaceous reducing agent is 0.5% -2% of the mass of the secondary nickel concentrate;
c. the blowing temperature in the oxygen-enriched smelting furnace is set to 1400-1600 ℃, and the slag is selected as FeO-SiO 2 CaO-FeO-SiO 2 CaO-FeO-SiO 2 -Al 2 O 3 Any one of the types, wherein the Fe/SiO 2 The mass ratio of Fe to Si in the slag is 0.7-1.3: 1, caO/SiO 2 The mass ratio of Ca to Si in the slag is 0.1-0.5: 1, a step of;
d. the method comprises the steps of regulating and controlling spray gun parameters to finish iron and sulfur removal in a slag layer converting area and timely reduction of NiO in a depletion area, setting the first spray gun spraying parameters in the converting area to have oxygen enrichment concentration of 65% -80%, spraying pressure of less than 0.5Mpa, spraying the slag layer by the spray gun, timely reducing NiO in the depletion area to obtain metallic nickel, and spraying the second spray gun to have oxygen enrichment concentration of 50% -65% and spraying pressure of less than 0.5Mpa;
e. the metallized nickel matte is discharged from a matte discharge port, the depleted slag is discharged from a slag discharge port, and finally the metallized nickel matte containing more than or equal to 72 percent of Ni, less than or equal to 21 percent of S, less than or equal to 2 percent of Fe, less than or equal to 5 percent of Cu and the balance of unavoidable impurities is obtained, wherein the slag contains less than or equal to 7 percent of Ni, 18 to 30 percent of Fe and SiO 2 23-48%, caO less than or equal to 8%, al 2 O 3 Less than or equal to 5 percent, S less than or equal to 2 percent, and the rest substances are unavoidable impurities.
Further, in the step b, the secondary nickel concentrate contains more than or equal to 65% of Ni, more than or equal to 25% of S, 1% -5% of Fe and SiO 2 Less than or equal to 2 percent, and the rest substances are unavoidable impurities.
Further, the reducing agent in the step b is any one of anthracite, pulverized coal or lignite.
Further, the iron removal and slag formation flux in the step b adopts quartz stone.
Further, in the step a, the first spray gun and the second spray gun are horizontally arranged on the side wall along the furnace body direction, the spraying area is a slag layer and is not in contact with the nickel matte layer, the service life of the spray gun can be prolonged by spraying the slag layer through the spray gun, and the reduction of the service life of the spray gun caused by thermal corrosion of nickel matte at the bottom is avoided.
The invention has the beneficial effects that:
1. the first spray gun of the converting area adopts the blowing weak oxidizing atmosphere for combustion smelting, namely, when the combustion coefficient of natural gas and oxygen-enriched air of the first spray gun is controlled, namely, the excess oxygen coefficient is 1.05-1.3, the weak oxidizing atmosphere can be achieved, wherein the oxygen-enriched concentration is 65-80%, the secondary nickel concentrate can be rapidly heated and melted, meanwhile, the blown excess oxygen participates in the desulfurization reaction and the iron oxidation slagging reaction, the purposes of short-flow smelting, desulfurization and iron removal are achieved, and metallized nickel matte is formed at the bottom of the furnace;
2. in the desulfurization and iron removal process of the blowing weak oxidizing atmosphere in the converting area, partial nickel is inevitably oxidized to form NiO which enters a slag layer, the NiO has a higher melting point, exists in a solid form in slag, and is easy to form dry slag to cause high melt viscosity and low fluidity. According to the technology, the reducing gas is blown by the second spray gun through the depletion zone, and the carbonaceous reducing agent can be added from the second feed inlet, so that NiO in slag can be reduced into metallic nickel in time and settled at the bottom of the furnace, the metallization rate of nickel matte at the bottom of the furnace can be further improved, and in the continuous feeding and smelting processes, the NiO in slag can be ensured to achieve dynamic balance, and the problem of furnace shutdown caused by overhigh content of NiO in slag is avoided;
3. the invention has the characteristic of high heat utilization rate, and can provide chemical reaction heat by using the injected excessive oxygen to participate in desulfurization and iron oxidation reaction while using natural gas combustion auxiliary heat to melt secondary nickel concentrate, thereby solving the problem that the reverberatory furnace only melts materials by radiant heat;
4. the invention can realize continuous smelting of secondary nickel concentrate, improve production efficiency and reduce smelting production cost.
Drawings
FIG. 1 is a schematic diagram of the structure of an oxygen-enriched smelting furnace of the present invention.
Detailed Description
The technical scheme of the invention is described in the following with reference to the accompanying drawings and the implementation method.
Example 1
A method for oxygen-enriched smelting of metallized nickel matte from nickel concentrate, comprising the following steps:
a. a depletion region and a blowing region which are communicated are arranged in an oxygen-enriched smelting furnace, a plurality of first spray guns are arranged in the blowing region, a plurality of second spray guns are arranged in the depletion region, wherein the first spray guns in the blowing region are used for spraying oxygen-enriched gas, the oxygen-enriched concentration is 70% and the peroxy coefficient is 1.05, the second spray guns are used for spraying neutral gas, the oxygen-enriched concentration is 60% and the peroxy coefficient is 0.9, and part of spray guns in the second spray guns can be pulverized coal spraying charging guns;
b. adding iron removal and slag forming flux into secondary nickel concentrate, feeding the secondary nickel concentrate into a furnace through a first feed inlet, and adding the iron removal and slag forming flux into the furnace through a belt feeder and a metering feeder, wherein the adding mass of the iron removal and slag forming flux is 1.0% of the mass of the secondary nickel concentrate, adding carbonaceous reducing agent, and directly adding the carbonaceous reducing agent into a second feed inlet or spraying the carbonaceous reducing agent into a depletion zone through a second spray gun, wherein the adding mass of the carbonaceous reducing agent is 1.0% of the mass of the secondary nickel concentrate;
c. the blowing temperature in the oxygen-enriched smelting furnace is set to 1550 ℃, and the slag is selected as FeO-SiO 2 The mass ratio of Fe and Si in the slag form is 0.75:1, a step of;
d. the method comprises the steps of regulating and controlling spray gun parameters to finish iron and sulfur removal in a slag layer converting area and timely reduction of NiO in a depletion area, setting the first spray gun spraying parameter in the converting area to have oxygen enrichment concentration of 70%, spraying pressure of less than 0.32Mpa, spraying the slag layer by the spray gun, timely reducing NiO in the depletion area to obtain metallic nickel, and spraying the second spray gun to have oxygen enrichment concentration of 60% and spraying pressure of less than 0.28Mpa;
e. the metallized nickel matte is discharged from the matte discharge port, the slag is discharged from the slag discharge port after depletion, and the final obtained product composition is shown in table 1.
TABLE 1 chemical composition of smelting output (unit: wt%)
As can be seen from the chemical composition of nickel matte and its corresponding phase composition in table 1, the ratio of nickel metallization is 27.483%; in the embodiment 1, the oxygen-enriched air with the oxygen-enriched concentration of 70% and the peroxy coefficient of 1.05 is used for carrying out weak oxidation melting, so that the secondary nickel concentrate achieves the purpose of desulfurizing and deironing, the condition of weak reducing gas is further adjusted, namely, the oxygen-enriched air with the oxygen-enriched concentration of 60% and the peroxy coefficient of 0.9 in a depletion region is used for carrying out reduction smelting, 1% of reducing agent is added, the NiO which is subjected to peroxy in slag is reduced into metal Ni in time and is settled on a nickel matte layer at the bottom of the furnace, and the metallization rate of the nickel matte is improved.
Example 2
A method for oxygen-enriched smelting of metallized nickel matte from nickel concentrate, comprising the following steps:
a. the method comprises the steps that a depletion zone and a converting zone which are communicated are arranged in an oxygen-enriched smelting furnace, a plurality of first spray guns are arranged in the converting zone, a plurality of second spray guns are arranged in the depletion zone, wherein the first spray guns in the converting zone are used for spraying oxygen-enriched gas, the oxygen-enriched concentration is 70% and the peroxy coefficient is 1.1, the second spray guns are used for spraying weak oxidizing gas, the oxygen-enriched concentration is 60% and the peroxy coefficient is 0.85, and part of spray guns in the second spray guns can be pulverized coal spraying charging guns;
b. adding iron removal and slag forming flux into secondary nickel concentrate, feeding the secondary nickel concentrate into a furnace through a first feed inlet, and adding the iron removal and slag forming flux into the furnace through a belt feeder and a metering feeder, wherein the adding mass of the iron removal and slag forming flux is 1.5% of the mass of the secondary nickel concentrate, adding carbonaceous reducing agent, and directly adding the carbonaceous reducing agent into a second feed inlet or spraying the carbonaceous reducing agent into a depletion zone through a second spray gun, wherein the adding mass of the carbonaceous reducing agent is 1.2% of the mass of the secondary nickel concentrate;
c. setting the converting temperature in the oxygen-enriched smelting furnace to 1480 ℃ and selecting CaO-FeO-SiO as slag 2 The mass ratio of Fe, ca and Si in the slag is 0.8:0.35:1, a step of;
d. the method comprises the steps of regulating and controlling spray gun parameters to finish iron and sulfur removal in a slag layer converting area and timely reduction of NiO in a depletion area, setting the spray gun spraying parameters in the converting area to be that oxygen-enriched concentration is 70%, the spraying pressure is smaller than 0.3Mpa, spraying the slag layer by the spray gun, timely reducing NiO in the depletion area to obtain metallic nickel, and spraying the nickel by the second spray gun to be that oxygen-enriched concentration is 60%, peroxy coefficient is 0.85, and spraying pressure is 0.26Mpa;
e. the metallized nickel matte is discharged from the matte discharge port, the slag is discharged from the slag discharge port after depletion, and the final obtained product cost is shown in table 2.
TABLE 2 chemical composition of smelting output (unit: wt%)
As can be seen from the chemical composition of nickel matte and its corresponding phase composition in table 2, the ratio of nickel metallization is 32.213%; in the embodiment 2, the oxygen-enriched air with the oxygen-enriched concentration of 70% and the peroxy coefficient of 1.1 is used for carrying out weak oxidation melting, so that the secondary nickel concentrate achieves the purpose of desulfurizing and deironing, the condition of weak reducing gas is further adjusted, namely, the oxygen-enriched air with the oxygen-enriched concentration of 60% and the peroxy coefficient of 0.85 in a depletion region is used for carrying out reduction smelting, 1.2% of reducing agent is added, the peroxy NiO in slag is reduced into metal Ni in time and is settled on a furnace bottom nickel matte layer, and the metallization rate of nickel matte is improved.
Claims (3)
1. A method for oxygen-enriched smelting of metallized nickel matte from nickel concentrate, which is characterized by comprising the following steps:
a. a converting area and a depletion area which are communicated are arranged in an oxygen-enriched smelting furnace, a plurality of first spray guns are arranged in the converting area, a plurality of second spray guns are arranged in the depletion area, the first spray guns are used for spraying oxygen-enriched gas, the oxygen-enriched concentration is 65% -80% and the peroxy coefficient is 1-1.3, the second spray guns are used for spraying neutral gas, the oxygen-enriched concentration is 50% -65% and the peroxy coefficient is 0.8-1, and part of spray guns can be arranged in the second spray guns to be pulverized coal spraying charging guns;
in the step a, the first spray gun and the second spray gun are horizontally arranged on the side wall along the furnace body direction, the spraying area is a slag layer and is not in contact with the nickel matte layer, the service life of the spray gun can be prolonged by spraying the slag layer through the spray gun, and the reduction of the service life of the spray gun caused by thermal corrosion of nickel matte at the bottom is avoided;
b. a first feed inlet and a second feed inlet are arranged at the top of an oxygen-enriched smelting furnace, the horizontal position of the first feed inlet is higher than that of the second feed inlet, the first feed inlet and a converting area are exactly in the same vertical line, the second feed inlet and a depletion area are exactly in the same vertical line, then, secondary nickel concentrate is added with iron-removing slag-forming flux, the secondary nickel concentrate enters the furnace through the first feed inlet, the adding mass of the iron-removing slag-forming flux is 0.5% -3% of the mass of the secondary nickel concentrate, and a carbonaceous reducing agent is added into the depletion area through the second feed inlet or through blowing by a second spray gun, and the adding mass of the carbonaceous reducing agent is 0.5% -2% of the mass of the secondary nickel concentrate;
in the step b, the secondary nickel concentrate contains more than or equal to 65% of Ni, more than or equal to 25% of S, 1% -5% of Fe and SiO 2 Less than or equal to 2 percent, and the rest substances are unavoidable impurities;
c. the blowing temperature in the oxygen-enriched smelting furnace is set to 1400-1600 ℃, and the slag is selected as FeO-SiO 2 CaO-FeO-SiO 2 CaO-FeO-SiO 2 -Al 2 O 3 Any one of the types, wherein the Fe/SiO 2 The mass ratio of Fe to Si in the slag is 0.7-1.3: 1, caO/SiO 2 The mass ratio of Ca to Si in the slag is 0.1-0.5: 1, a step of;
d. the method comprises the steps of regulating and controlling spray gun parameters to finish iron and sulfur removal in a slag layer converting area and timely reduction of NiO in a depletion area, setting the first spray gun spraying parameters in the converting area to have oxygen enrichment concentration of 65% -80%, spraying pressure of less than 0.5Mpa, spraying the slag layer by the spray gun, timely reducing NiO in the depletion area to obtain metallic nickel, and spraying the second spray gun to have oxygen enrichment concentration of 50% -65% and spraying pressure of less than 0.5Mpa;
e. the metallized nickel matte is discharged from a matte discharge port, the depleted slag is discharged from a slag discharge port, and finally the metallized nickel matte containing more than or equal to 72 percent of Ni, less than or equal to 21 percent of S, less than or equal to 2 percent of Fe, less than or equal to 5 percent of Cu and the balance of unavoidable impurities is obtained, wherein the slag contains less than or equal to 7 percent of Ni, 18 to 30 percent of Fe and SiO 2 23-48%, caO less than or equal to 8%, al 2 O 3 Less than or equal to 5 percent, S less than or equal to 2 percent, and the rest substances are unavoidable impurities.
2. The method for oxygen-enriched smelting of metallized nickel matte from nickel concentrate according to claim 1, wherein the reducing agent in step b is any one of anthracite, pulverized coal or lignite.
3. The method for oxygen-enriched smelting of metallized nickel matte from nickel concentrate according to claim 1, wherein the iron removal and slag making flux in step b is quartz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211693795.XA CN115852166B (en) | 2022-12-28 | 2022-12-28 | Method for smelting metallized nickel matte through nickel concentrate oxygen enrichment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211693795.XA CN115852166B (en) | 2022-12-28 | 2022-12-28 | Method for smelting metallized nickel matte through nickel concentrate oxygen enrichment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115852166A CN115852166A (en) | 2023-03-28 |
| CN115852166B true CN115852166B (en) | 2023-11-21 |
Family
ID=85655387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211693795.XA Active CN115852166B (en) | 2022-12-28 | 2022-12-28 | Method for smelting metallized nickel matte through nickel concentrate oxygen enrichment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115852166B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117286349B (en) * | 2023-11-24 | 2024-02-13 | 中国恩菲工程技术有限公司 | Method for smelting nickel-containing material to produce high-nickel matte |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1985001750A1 (en) * | 1983-10-19 | 1985-04-25 | Commonwealth Scientific And Industrial Research Or | Smelting nickel ores or concentrates |
| DE4320319A1 (en) * | 1992-06-18 | 1993-12-23 | Outokumpu Harjavalta Metals Oy | Producing mattes of highly enriched nickel and metallised sulphide(s) - includes successive use of flame melting and electric furnaces |
| CN105803201A (en) * | 2016-04-28 | 2016-07-27 | 天津闪速炼铁技术有限公司 | Single-step metallurgical flash furnace and metallurgical method |
| CN111961880A (en) * | 2020-07-28 | 2020-11-20 | 中国恩菲工程技术有限公司 | Method for producing metallized nickel anode plate by using bottom blowing furnace |
| RU2749184C1 (en) * | 2019-10-12 | 2021-06-07 | Чайна Энфи Инджиниринг Корпорейшн | Device and method for top-blown nickel smelting |
| CN113502402A (en) * | 2021-06-08 | 2021-10-15 | 金川集团股份有限公司 | Direct nickel smelting method by top-side composite smelting |
| CN114182110A (en) * | 2021-12-03 | 2022-03-15 | 中国瑞林工程技术股份有限公司 | Side-blown smelting device and smelting method |
-
2022
- 2022-12-28 CN CN202211693795.XA patent/CN115852166B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1985001750A1 (en) * | 1983-10-19 | 1985-04-25 | Commonwealth Scientific And Industrial Research Or | Smelting nickel ores or concentrates |
| DE4320319A1 (en) * | 1992-06-18 | 1993-12-23 | Outokumpu Harjavalta Metals Oy | Producing mattes of highly enriched nickel and metallised sulphide(s) - includes successive use of flame melting and electric furnaces |
| CN105803201A (en) * | 2016-04-28 | 2016-07-27 | 天津闪速炼铁技术有限公司 | Single-step metallurgical flash furnace and metallurgical method |
| RU2749184C1 (en) * | 2019-10-12 | 2021-06-07 | Чайна Энфи Инджиниринг Корпорейшн | Device and method for top-blown nickel smelting |
| CN111961880A (en) * | 2020-07-28 | 2020-11-20 | 中国恩菲工程技术有限公司 | Method for producing metallized nickel anode plate by using bottom blowing furnace |
| CN113502402A (en) * | 2021-06-08 | 2021-10-15 | 金川集团股份有限公司 | Direct nickel smelting method by top-side composite smelting |
| CN114182110A (en) * | 2021-12-03 | 2022-03-15 | 中国瑞林工程技术股份有限公司 | Side-blown smelting device and smelting method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115852166A (en) | 2023-03-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110129584B (en) | Short-process pyrometallurgical zinc smelting device and method | |
| CN115852166B (en) | Method for smelting metallized nickel matte through nickel concentrate oxygen enrichment | |
| CN111424175A (en) | System and method for smelting zinc concentrate and zinc-containing secondary material | |
| CN113265549B (en) | Method for treating laterite-nickel ore and stainless steel metallurgy waste by oxygen-enriched side-blown smelting furnace | |
| US3725044A (en) | Method of continuous processing of sulfide ores | |
| WO2024046244A1 (en) | Method and apparatus for producing high-nickel matte from low-nickel matte | |
| CN111411230A (en) | Suspension smelting electrothermal reduction furnace and method for smelting zinc concentrate | |
| CN112981136B (en) | One-step zinc smelting method for spraying zinc concentrate in molten pool | |
| WO2018228073A1 (en) | Anode copper production method and device | |
| CN113046575A (en) | Smelting method of nickel sulfide concentrate | |
| CN218059144U (en) | Device for producing high nickel matte from low nickel matte | |
| CN110129574A (en) | The production method of cupric cast iron | |
| CN113251799A (en) | Device for producing metallized anode plate by oxygen-enriched combustion furnace | |
| CN108359910A (en) | A kind of low carbon low silicon aluminium killed steel composite purifying agent alloy production method | |
| CN111663015B (en) | Method for producing pure iron by smelting reduction process | |
| CN111500813B (en) | Method for utilizing iron and vanadium resources by melting vanadium-titanium metallized pellets in electric furnace | |
| WO2001086006A2 (en) | Improved process for the production of stainless steels and high chromium steels and stainless steelproduced thereby | |
| CN207877834U (en) | A kind of hot addition copper smelter system of copper converting slag | |
| CN215638759U (en) | Device for producing metallized anode plate by oxygen-enriched combustion furnace | |
| CN111961803A (en) | Production process and method of industrial pure iron | |
| KR20210079708A (en) | Method for preparing nickel matt from ferronickel having low nickel content | |
| CN114686634B (en) | 4N-grade high-purity iron and fire method industrial production method thereof | |
| WO1997020958A1 (en) | Recovery of cobalt from slag | |
| CN115537491B (en) | Converter converting method of low-temperature low-silicon molten iron | |
| CN114892066B (en) | Production method of steel for low-carbon electrode |
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 |