CN111440959A - Method for adjusting metallurgical flue gas components of smelting furnace - Google Patents
Method for adjusting metallurgical flue gas components of smelting furnace Download PDFInfo
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- CN111440959A CN111440959A CN202010145695.8A CN202010145695A CN111440959A CN 111440959 A CN111440959 A CN 111440959A CN 202010145695 A CN202010145695 A CN 202010145695A CN 111440959 A CN111440959 A CN 111440959A
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- 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
- C22B25/00—Obtaining tin
- C22B25/02—Obtaining tin by dry processes
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/69—Sulfur trioxide; Sulfuric acid
- C01B17/74—Preparation
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- 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
- C22B5/00—General methods of reducing to metals
- C22B5/02—Dry methods smelting of sulfides or formation of mattes
- C22B5/10—Dry methods smelting of sulfides or formation of mattes by solid carbonaceous reducing agents
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- 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
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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- Organic Chemistry (AREA)
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Abstract
A method for adjusting metallurgical flue gas components of a smelting furnace belongs to the technical field of non-ferrous metallurgy and chemical engineering, and comprises the following steps: spraying pulverized coal, air and oxygen into the furnace through a spray gun; and (3) adding the concentrate into the furnace, performing primary air distribution and anoxic combustion in the furnace, primarily adjusting smoke components by secondary air distribution of a waste heat boiler, and performing tertiary air distribution of an acid making system. The metallurgical flue gas generated by the invention stabilizes the production of an acid making system, ensures the production safety, improves the quality of sulfuric acid products and reduces the environmental protection pressure of tail flue gas.
Description
Technical Field
The invention belongs to the technical field of non-ferrous metallurgy and chemical industry, and particularly relates to a method for adjusting smoke components of an oxygen-enriched smelting furnace in a nickel metallurgy production process.
Background
The smelting plant Ausmelt furnace is an oxygen-enriched top-blown smelting furnace. The smelting temperature is 1300-1400 ℃. The metallurgical flue gas generated in normal production contains SO2CO, elemental S and NOXEtc. gas of CO and simple substance S, NOXAnd the like can affect electric dust collection, an acid making and purifying system, product sulfuric acid and tail smoke exhaust gas. In order to ensure safety, reduce environmental risks, reduce cost, stabilize production and achieve optimal economic benefits, a method for improving metallurgical smoke components of an oxygen-enriched smelting furnace in the production process is urgently needed.
Therefore, there is a need in the art for a new solution to solve this problem.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the method for adjusting the metallurgical flue gas components of the smelting furnace is provided, the produced metallurgical flue gas stabilizes the production of an acid making system, ensures the production safety, improves the quality of sulfuric acid products, and reduces the environmental protection pressure of tail exhaust gas.
A method for adjusting metallurgical flue gas components of a smelting furnace is characterized by comprising the following steps: comprises the following steps which are sequentially carried out,
step one, mixing pulverized coal, air and oxygen in a mass part ratio of 4 per cubic meter: 13: 7, mixing in proportion, and spraying into a molten pool through a spray gun;
step two, adding the nickel sulfide concentrate into a molten pool through a belt, wherein the concentrate comprises the following components in percentage by mass: 5 to 10 percent of nickel, 2 to 4 percent of copper, 0.1 to 1 percent of cobalt, 22 to 31 percent of iron, 16 to 22 percent of sulfur, 15 to 30 percent of silicon dioxide, and the balance of impurities, wherein the sum of the content percentages of the components is equal to 100 percent;
step three,Adjusting the primary air distribution point air distribution in the Ausmelt furnace, controlling the concentration of air distribution oxygen to be 21% -80%, controlling the content of CO in the flue gas of the Ausmelt furnace to be less than 1%, and controlling the content of simple substance S to be less than 1g/NM3;
Adjusting the air distribution point of the Ausmelt furnace waste heat boiler, and carrying out secondary air distribution, wherein the air distribution oxygen concentration is 21% -100%, the CO content in the flue gas of the Ausmelt furnace waste heat boiler is controlled to be less than 3000ppm, and the simple substance S content is controlled to be 0;
and fifthly, adjusting an air distribution point at the inlet of the flue gas acid-making drying tower, and carrying out tertiary air distribution, wherein the concentration of air distribution oxygen is 21-100%, and CO with the residual concentration of less than 3000ppm in the flue gas acid-making drying tower is combusted in a converter to supplement the heat of the converter.
Through the design scheme, the invention can bring the following beneficial effects: the method for adjusting the metallurgical flue gas components of the smelting furnace has the advantages that the produced metallurgical flue gas stabilizes the production of an acid making system, ensures the production safety, improves the quality of sulfuric acid products and reduces the environmental protection pressure of tail exhaust gas.
Further, the present invention is to suppress thermal NO by appropriately reducing the air volume (oxygen volume) in the Ausmelt furnaceXThe generated sulfuric acid can improve the quality of sulfuric acid products and reduce NO in tail exhaust gasXAnd (4) content.
According to the invention, the secondary air is added into the boiler to adjust the CO content to be below 3000ppm, so that the explosion of the subsequent electric dust collection is prevented, and the safety is ensured.
The invention completely changes the simple substance S into SO by adding secondary air into the boiler2The blockage of an acid making purification system caused by elemental S desublimation is prevented, and stable production is ensured.
In the invention, tertiary air is distributed at the drying inlet of the acid making system, so that the residual CO reacts in the converter to generate CO2Supplement heat for the converter and improve SO2Conversion to SO3The conversion efficiency of the furnace reduces the power consumption of the electric furnace and saves energy.
Drawings
The invention is further described with reference to the following figures and detailed description:
FIG. 1 is a schematic block diagram of the flow of a method for adjusting metallurgical flue gas components of a smelting furnace according to the present invention.
Detailed Description
The first embodiment,
A method for adjusting metallurgical fume components of a smelting furnace, as shown in figure 1, comprises the following steps which are carried out in sequence,
step one, spraying pulverized coal, air and oxygen into a molten pool through a spray gun, wherein the pulverized coal, the air and the oxygen are used in cubic dosage Kg/m34: 13: 7 is sprayed into the furnace;
step two, adding the nickel sulfide concentrate into a molten pool through a belt, wherein the concentrate comprises the following components in percentage by mass: 5 to 10 percent of nickel, 2 to 4 percent of copper, 0.1 to 1 percent of cobalt, 22 to 31 percent of iron, 16 to 22 percent of sulfur, 15 to 30 percent of silicon dioxide, and the balance of impurities, wherein the sum of the content percentages of the components is equal to 100 percent;
step three, adjusting the primary air distribution point air distribution in the furnace by an Ausmelt furnace operator, controlling the oxygen concentration of the air distribution to be 21% -80%, controlling the CO content in the flue gas of the smelting furnace to be less than 1%, and controlling the elemental sulfur content to be less than 1g/NM3;
Step four, the waste heat boiler of the Ausmelt furnace is mainly operated, secondary air distribution point air distribution is adjusted, the oxygen concentration of the air distribution is 21% -100%, the flue gas of the smelting furnace is controlled to contain CO less than 3000ppm, and the content of elemental sulfur is 0;
and fifthly, the flue gas acid-making drying tower is mainly operated to adjust a tertiary air distribution point at the inlet of the drying tower to distribute air, the concentration of air distribution oxygen is 21-100%, the residual CO with the concentration of less than 3000ppm is combusted in the converter, and the heat of the converter is supplemented in an auxiliary manner.
Example II,
A method for adjusting metallurgical flue gas components of a smelting furnace comprises the following steps,
step one, spraying pulverized coal, air and oxygen into a molten pool through a spray gun, wherein the pulverized coal, the air and the oxygen are used in cubic dosage Kg/m3According to the following steps of 4: 13: 7 is sprayed into the furnace;
step two, adding the nickel sulfide concentrate into a molten pool through a belt, wherein the concentrate comprises the following components in percentage by mass: 5 to 10 percent of nickel, 2 to 4 percent of copper, 0.1 to 1 percent of cobalt, 22 to 31 percent of iron, 16 to 22 percent of sulfur, 15 to 30 percent of silicon dioxide, and the balance of impurities, wherein the sum of the content percentages of the components is equal to 100 percent;
step three, adjusting the primary air distribution point air distribution in the furnace by operating personnel of the Ausmelt furnace (hereinafter referred to as the Ausmelt furnace), wherein the oxygen concentration of the air is 21-80%, the CO content of the flue gas of the smelting furnace is controlled to be less than 1%, and the elemental sulfur content is controlled to be less than 1g/NM3;
Step four, the Australian furnace waste heat boiler is mainly operated, secondary air distribution point air distribution is adjusted, the oxygen concentration of air is 21% -100%, the CO content of flue gas of the smelting furnace is controlled to be less than 100ppm, and the elemental sulfur content is 0;
step five, simultaneously accessing Australian furnace flue gas and converter flue gas into the acid making system;
step six, ensuring that SO in the flue gas is enough through primary air distribution in step three and secondary air distribution in step four2All converted to SO3,And at the moment, the flue gas acid making main operation closes the tertiary air distribution point at the inlet of the drying tower for air distribution.
Example III,
A method for adjusting metallurgical flue gas components of a smelting furnace comprises the following steps,
a conventional Ausmelt furnace is adopted for nickel metallurgy operation,
step one, the acid making system is only connected with converter flue gas;
step two, adjusting tertiary air distribution point air distribution of the inlet of the drying tower by the flue gas acid making main operation to ensure SO2All converted to SO3。
The invention distributes air in a flue gas pipeline from a smelting furnace to an acid making system in sections so as to achieve the following purposes:
first, thermal NO inhibition in smelting furnaceXGenerating;
secondly, air (oxygen-enriched air and oxygen) is added into the 600-800 ℃ section of the boiler, the CO concentration in the flue gas is controlled below 3000ppm, and the safe operation of electric dust collection is ensured;
and thirdly, air (oxygen-enriched air and oxygen) is added into a drying inlet of the acid making system, so that CO with the concentration of less than 3000ppm in the residual flue gas is completely combusted, and a part of heat is provided for the converter.
The above description is only a part of the embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (1)
1. A method for adjusting metallurgical flue gas components of a smelting furnace is characterized by comprising the following steps: comprises the following steps which are sequentially carried out,
step one, mixing pulverized coal, air and oxygen in a mass part ratio of 4 per cubic meter: 13: 7, mixing in proportion, and spraying into a molten pool through a spray gun;
step two, adding the nickel sulfide concentrate into a molten pool through a belt, wherein the concentrate comprises the following components in percentage by mass: 5 to 10 percent of nickel, 2 to 4 percent of copper, 0.1 to 1 percent of cobalt, 22 to 31 percent of iron, 16 to 22 percent of sulfur, 15 to 30 percent of silicon dioxide, and the balance of impurities, wherein the sum of the content percentages of the components is equal to 100 percent;
adjusting the primary air distribution point air distribution in the Ausmelt furnace, controlling the concentration of air distribution oxygen to be 21% -80%, controlling the CO concentration content in the flue gas of the Ausmelt furnace to be less than 1%, and controlling the content of simple substance S to be less than 1g/Nm3;
Adjusting the air distribution point of the Ausmelt furnace waste heat boiler, and carrying out secondary air distribution, wherein the air distribution oxygen concentration is 21% -100%, the CO content in the flue gas of the Ausmelt furnace waste heat boiler is controlled to be less than 3000ppm, and the simple substance S content is controlled to be 0;
and fifthly, adjusting an air distribution point at the inlet of the flue gas acid-making drying tower, and carrying out tertiary air distribution, wherein the concentration of air distribution oxygen is 21-100%, and CO with the residual concentration of less than 3000ppm in the flue gas acid-making drying tower is combusted in a converter to supplement the heat of the converter.
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Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102140585A (en) * | 2011-03-11 | 2011-08-03 | 吉林吉恩镍业股份有限公司 | Method for smelting nickel ore concentrate by using smelting furnace |
CN102268557A (en) * | 2011-08-02 | 2011-12-07 | 云南锡业集团(控股)有限责任公司 | One-step oxidizing smelting, retailoring and slag fuming volatilization method for lead sulphide concentrate |
CN102374781A (en) * | 2010-08-17 | 2012-03-14 | 济源市万洋冶炼(集团)有限公司 | Direct lead-smelting comprehensive metallurgical device and smelting process |
RU2011111924A (en) * | 2011-03-29 | 2012-10-10 | Общество с ограниченной ответственностью "Институт Гипроникель" (RU) | METHOD FOR PROCESSING TIN CONTAINING MATERIALS |
CN103196125A (en) * | 2013-04-16 | 2013-07-10 | 四川川润动力设备有限公司 | Waste heat boiler utilizing tail gas of nickel smelting system |
CN106185841A (en) * | 2015-05-05 | 2016-12-07 | 上海东化环境工程有限公司 | Industry sulfur-containing tail gas prepares concentrated sulphuric acid technique |
-
2020
- 2020-03-05 CN CN202010145695.8A patent/CN111440959A/en active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102374781A (en) * | 2010-08-17 | 2012-03-14 | 济源市万洋冶炼(集团)有限公司 | Direct lead-smelting comprehensive metallurgical device and smelting process |
CN102140585A (en) * | 2011-03-11 | 2011-08-03 | 吉林吉恩镍业股份有限公司 | Method for smelting nickel ore concentrate by using smelting furnace |
RU2011111924A (en) * | 2011-03-29 | 2012-10-10 | Общество с ограниченной ответственностью "Институт Гипроникель" (RU) | METHOD FOR PROCESSING TIN CONTAINING MATERIALS |
CN102268557A (en) * | 2011-08-02 | 2011-12-07 | 云南锡业集团(控股)有限责任公司 | One-step oxidizing smelting, retailoring and slag fuming volatilization method for lead sulphide concentrate |
CN103196125A (en) * | 2013-04-16 | 2013-07-10 | 四川川润动力设备有限公司 | Waste heat boiler utilizing tail gas of nickel smelting system |
CN106185841A (en) * | 2015-05-05 | 2016-12-07 | 上海东化环境工程有限公司 | Industry sulfur-containing tail gas prepares concentrated sulphuric acid technique |
Non-Patent Citations (1)
Title |
---|
高晓艳: "《澳斯麦特炉氮氧化合物产生的原因分析》", 《中国有色冶金》 * |
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