CN112391535A - Treatment and utilization device and method for recovering zinc oxide from metallurgical zinc-containing ash by suspension smelting reduction - Google Patents
Treatment and utilization device and method for recovering zinc oxide from metallurgical zinc-containing ash by suspension smelting reduction Download PDFInfo
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Abstract
The invention discloses a device and a method for treating and utilizing metallurgical zinc-containing ash in a suspension state for smelting reduction and recovery of zinc oxide. The device comprises a suspended state smelting reduction furnace and an integrated complete device for zinc vapor oxidation collection and waste heat recovery; the invention thoroughly abandons the traditional rotary furnace and the melting reduction furnace, carries out brand new technical innovation, forms a production device and a method for thoroughly treating and utilizing the zinc-containing ash in a suspension state for melting reduction and the high and low zinc-containing ash for eating through, realizes brand new technical breakthrough, makes the one-step thorough treatment and utilization of the high and low zinc-containing ash possible, and has remarkable novelty, creativity and practicability.
Description
Technical Field
The invention relates to a device and a method for treating and utilizing metallurgical zinc-containing ash, belonging to the technical field of environmental protection and energy conservation.
Background
With the development of steel smelting and lead-zinc smelting industries, the amount of zinc-containing ash to be treated is greatly increased, 2000 million tons of zinc-containing ash exist in the steel industry every year, a large part of zinc-containing ash still belongs to dangerous wastes, and great environmental protection pressure of solid waste treatment is increased for the metallurgy industry. The zinc-containing dedusting ash is treated and utilized by a plurality of methods, such as a rotary kiln technology, a rotary hearth furnace technology, a small blast furnace technology, a black dragon furnace technology, a direct wet method technology and the like. The patent technologies include Chinese patent ZL 201610145017.5, Chinese patent ZL 201821915981.2 and the like. The patents or the technologies have different defects of large investment, incomplete dezincification, long process, insufficient recycling of iron in slag and the like. Therefore, the new technology which has the advantages of investment saving, short flow, thorough dezincification and sufficient and efficient recovery of iron in slag is provided, and the requirement of environmental protection on solid waste treatment in the metallurgical industry is met.
Disclosure of Invention
The invention aims to provide a device and a method for treating and utilizing metallurgical zinc-containing ash, which have the advantages of investment saving, short flow, thorough dezincification and full and high-efficiency recovery of iron in slag, and are urgent needs for environmental protection development.
The invention provides a device and a method for treating and utilizing zinc-containing ash in metallurgical industry, especially pays attention to short flow and investment saving of the zinc-containing ash treatment, high dezincification rate and one-step treatment of high and low zinc-containing ash, accords with the national industrial policy, realizes harmless treatment and resource utilization of the low zinc-containing ash, and has remarkable novelty, creativity and practicability. The invention controls and utilizes metallurgical zinc-containing ash, the recovery rate of zinc is more than 95 percent, iron is recovered in the form of molten iron, the recovery rate is more than 95 percent, and the zinc content of the recovered zinc hypoxide is more than 56 percent, thereby realizing the high-efficiency recovery and utilization of various metallurgical zinc-containing dedusting ashes. The invention relates to an innovative device and method for thoroughly treating and utilizing various zinc-containing dedusting ash in the metallurgical industry and fully and efficiently recovering iron in slag.
The invention provides a device for treating and utilizing metallurgical zinc-containing dedusting ash, which comprises a suspended smelting reduction furnace and an integrated complete device for zinc-containing steam oxidation recovery and waste heat recovery.
The suspension smelting reduction furnace is a vertical cylindrical furnace (round or square or polygonal) with a water-cooled wall and a refractory lining, and the top of the furnace body is provided with a zinc-containing ash inlet, a reducing agent inlet and a combustion improver hot air or oxygen inlet; a molten pool is arranged at the lower part of the furnace body; a slag outlet and a molten iron outlet are arranged; the upper side of the molten pool is provided with a high-temperature airflow outlet containing zinc vapor and dust.
The zinc vapor oxidation recovery device comprises a cyclone dust collector, an oxidation chamber, a waste heat utilization device and a zinc oxide dust collection device which are sequentially connected outside zinc-containing vapor and dust outlets, wherein the zinc oxide dust collection device is respectively connected with a wet-process nano zinc oxide production device and a tail gas standard discharge device;
the oxidation chamber is provided with a cold air or oxygen inlet.
The device for treating and utilizing the metallurgical zinc-containing ash is characterized in that the suspended smelting reduction furnace is provided with a water-cooling wall device.
The device for treating and utilizing the metallurgical zinc-containing ash is characterized in that a molten iron desulphurization tank is connected outside a molten iron outlet of the smelting reduction furnace.
According to the device for treating and utilizing the metallurgical zinc-containing dedusting ash, in the smelting reduction furnace, a high-density SiAiON-based refractory material is combined with a silicon carbide-based brick as a refractory material, and high-alumina phosphate slurry is used for masonry, so that the zinc erosion resistance of a furnace lining is improved.
The invention adopts the device for treating and utilizing the metallurgical zinc-containing dedusting ash, and provides a method for treating and utilizing the metallurgical zinc-containing ash, which comprises the following steps:
the method comprises the steps of mixing and spraying zinc-containing ash (with unlimited zinc content) and a reducing agent, hot air or oxygen into a furnace from an inlet at the top of a furnace body;
(2) after materials containing zinc ash, a reducing agent, hot air or oxygen and the like enter a furnace body, the materials are dispersed and fall in a suspension state from top to bottom by an approximate cylinder to complete the reduction reaction;
(3) reducing iron oxide in the zinc-containing ash into molten iron, enabling the molten iron to fall into a molten pool at the lower part, floating the molten slag on the molten iron, and pumping zinc-containing steam and other dust out of a zinc steam and dust outlet:
(4) molten iron is periodically discharged from a molten iron outlet at the lower part of the smelting reduction furnace and enters a molten iron desulphurization tank for desulphurization, and the desulphurized molten iron is sent to the next process; other non-volatile, non-meltable residues are periodically discharged from a tap hole in the middle of the smelting reduction furnace.
The method for treating and utilizing the metallurgical zinc-containing ash controls the temperature of the melting reduction furnace at 1300-1550 ℃.
According to the method for treating and utilizing the metallurgical zinc-containing dedusting ash, the oxygen serving as a combustion improver is pure oxygen, and the temperature of hot air is 800-1200 ℃; the reducing agent is any one of anthracite, semi-coke, carbon monoxide and hydrogen or a mixed gas of the carbon monoxide and the hydrogen.
The method for treating and utilizing the metallurgical zinc-containing ash is characterized by comprising the following steps: the suspension state melting reduction reaction is completed within 2-6 seconds;
the method for treating and utilizing the metallurgical zinc-containing ash is characterized by comprising the following steps: the granularity of the zinc-containing ash and anthracite or semi-coke or coke which is taken as a reducing agent entering the suspension smelting reduction furnace is less than 300 meshes;
the method for treating and utilizing the metallurgical zinc-containing ash comprises the steps that zinc-containing steam and dust high-temperature airflow extracted from a zinc-containing steam and dust high-temperature gas outlet is dedusted by a cyclone dust collector, the zinc-containing steam high-temperature airflow enters an oxidation chamber, the zinc steam is oxidized into zinc oxide, other low-temperature volatile metal vapors are oxidized into other oxides, the zinc oxide and other oxide-containing high-temperature gas enters a waste heat utilization device to recover waste heat, the zinc oxide and other dust-containing airflow cooled to below 200 ℃ enters a zinc oxide collection device to collect zinc oxide and other dust, and tail gas reaches the standard and is discharged;
in the method for treating and utilizing the metallurgical zinc-containing ash, the content of carbon monoxide or hydrogen or the mixed gas of carbon monoxide and hydrogen in a reducing agent is less than 10 percent in zinc-containing steam and high-temperature dust gas flow extracted from a zinc-containing steam and high-temperature dust gas outlet;
the method for treating and utilizing the metallurgical zinc-containing ash comprises the step of enabling zinc oxide and other dust collected by a zinc oxide collecting device to enter a wet process section and producing the nano zinc oxide by an ammonia leaching method or an acid leaching method.
The invention has the technical characteristics and beneficial effects that: a. the suspended smelting reduction furnace, the zinc vapor oxidation collection and waste heat recovery integrated complete device are utilized, the zinc in the zinc-containing ash is removed at a high removal rate by a one-step method, and the treatment and utilization process of the zinc-containing ash is obviously shortened; b. the method has the advantages that all zinc-containing ash solid waste resources containing 0.1-10% and above of zinc are completely recycled by one step, and the utilization rate of zinc-containing ash treatment resources is greatly improved; c. the suspension smelting reduction furnace and the zinc vapor oxidation collection and waste heat recovery integrated complete device are operated in a whole negative pressure manner, so that the environmental pollution is small; d. the byproduct iron is reduced into molten iron and becomes low-sulfur molten iron through desulfurization, and the quality of the byproduct pig iron is improved.
Drawings
FIG. 1 is a block diagram of the technological process of the zinc-containing ash treatment and utilization device.
FIG. 2 is a schematic view of a zinc-containing ash suspension smelting reduction and zinc oxide recovery plant according to the present invention.
In the figure: 1. the system comprises a suspension state melting reduction zone, a slag layer zone 2, a molten pool 3, a zinc-containing ash inlet 4, a reducing agent inlet 5, a hot air or oxygen inlet 6, a slag outlet 7, a molten iron outlet 8, a molten iron desulphurization tank 9, a zinc-containing steam, dust and high-temperature airflow outlet 10, a cyclone dust collector 11, an oxidation chamber 12, a cold air or oxygen inlet 13, a waste heat utilization device 14, a zinc oxide dust collection device 15, a wet method production nano zinc oxide device 16 and a tail gas standard discharge device 17.
Detailed Description
The present invention is further illustrated by, but is not limited to, the following examples.
As shown in FIGS. 1-2, a device for treating and utilizing metallurgical zinc-containing ash comprises a suspension smelting reduction furnace, a zinc vapor oxidation collection and waste heat recovery integrated complete device;
a suspension smelting reduction furnace of an integrated device comprises: 1. the molten iron desulphurization system comprises a suspension state smelting reduction zone, a slag layer zone 2, a molten pool 3, a zinc-containing ash inlet 4, a reducing agent inlet 5, a hot air or oxygen inlet 6, a slag outlet 7, a molten iron outlet 8, a molten iron desulphurization tank 9, and a zinc-containing steam, dust and high-temperature airflow outlet 10;
the zinc-containing steam oxidation collection and waste heat recovery device of the integrated complete device comprises: 11. the device comprises a cyclone dust collector, 12 parts of an oxidation chamber, 13 parts of a cold air or oxygen inlet, 14 parts of a waste heat utilization device, 15 parts of a zinc oxide dust collection device, 16 parts of a nano zinc oxide production device by a wet method and 17 parts of a tail gas standard discharge device.
The suspended smelting reduction furnace is provided with a water cooling wall device.
According to the suspension smelting reduction furnace, the high-density SiAiON-based refractory material is combined with the silicon carbide-based brick as the refractory material, and the high-alumina phosphate slurry is used for masonry, so that the zinc erosion resistance of a furnace lining is improved.
The invention provides a method for treating and utilizing metallurgical zinc-containing ash, which adopts the device and comprises the following steps:
mixing and spraying zinc-containing ash (with unlimited zinc content) and a reducing agent, hot air or oxygen into a suspended state melting reduction furnace from an inlet at the top of a furnace body;
(2) after materials containing zinc ash, a reducing agent, hot air or oxygen and the like enter a furnace body, the materials are dispersed and fall in a suspension state from top to bottom by an approximate cylinder to complete the reduction reaction;
(3) reducing iron oxide in the zinc-containing ash into molten iron, enabling the molten iron to fall into a molten pool at the lower part, floating the molten slag on the molten iron, and pumping zinc vapor and other dust out of a zinc vapor and dust and high-temperature airflow outlet:
(4) molten iron is periodically discharged from a molten iron outlet at the lower part of the smelting reduction furnace and enters a molten iron desulphurization tank for desulphurization, and the desulphurized molten iron is sent to the next process; other non-volatile and infusible residues are periodically discharged from a slag outlet at the middle part of the suspended state smelting reduction furnace.
The temperature of the melting reduction furnace is controlled at 1300-1550 ℃.
The combustion improver oxygen is pure oxygen or hot air, and the temperature of the hot air is 800-1200 ℃;
the reducing agent is any one of anthracite, semi-coke, carbon monoxide and hydrogen or a mixed gas of the carbon monoxide and the hydrogen.
The reaction of the materials in the suspension smelting reduction furnace is completed within 2-6 seconds;
the granularity of the zinc-containing ash and anthracite or semi-coke or coke which is taken as a reducing agent entering the suspension smelting reduction furnace is less than 300 meshes;
the zinc-containing steam and the high-temperature dust airflow which are extracted from the zinc-containing steam and high-temperature dust gas outlet are dedusted by a cyclone deduster, the zinc-containing steam high-temperature airflow enters an oxidation chamber, the zinc steam is oxidized into zinc oxide, other low-temperature volatile metal vapors are oxidized into other oxides, the high-temperature gas containing the zinc oxide and other oxides enters a waste heat utilization device to recover waste heat, the zinc oxide and other dust airflow which is cooled to below 200 ℃ enters a zinc oxide collection device to collect the zinc oxide and other dust, and tail gas reaches the standard and is discharged;
in the zinc-containing steam and the high-temperature dust gas flow extracted from the zinc-containing steam and high-temperature dust gas outlet, the content of carbon monoxide or hydrogen or the mixed gas of carbon monoxide and hydrogen in the reducing agent is less than 10 percent;
the zinc oxide and other dust collected from the zinc oxide collecting device enter a wet process section to produce the nano zinc oxide by an ammonia leaching method or an acid leaching method.
The whole process of the suspension smelting reduction furnace and the zinc vapor oxidation collection and waste heat recovery integrated complete device is operated under negative pressure.
The above percentages are all weight percentages.
The method for treating and utilizing the metallurgical zinc-containing ash by the complete equipment is detailed by the specific implementation process.
The first embodiment is as follows:
the zinc-containing ash and a reducing agent CO + H2And feeding oxygen serving as a combustion improver into the suspension smelting reduction furnace, controlling the furnace temperature at 1550 ℃ and reacting for 2 seconds to complete the whole smelting reduction reaction of the zinc-containing ash, smelting and reducing iron in the zinc-containing ash into molten iron, feeding the molten iron into a molten pool, and periodically discharging the molten iron from a molten iron outlet, wherein non-volatile and non-fusible residues are periodically discharged from a slag outlet. The mixed high-temperature gas of zinc-containing steam and dust is discharged from a zinc-containing steam and dust high-temperature gas outlet and enters a cyclone dust collector for dust removal, the high-temperature gas flow of the zinc-containing steam after dust removal enters an oxidation chamber to be oxidized into zinc oxide, then the high-temperature gas flow containing the zinc oxide enters a waste heat utilization device to produce steam and electricity as by-products, then the gas flow containing the zinc oxide and other dust is cooled to below 200 ℃ and enters a zinc oxide collection device to collect the zinc oxide, and the gas after collecting the zinc oxide dust is treated and discharged after reaching the. Collected secondary oxygenThe zinc oxide enters a wet process section and is produced into the nano zinc oxide by an ammonia leaching process.
Example two:
feeding zinc ash, anthracite as a reducing agent and oxygen as a combustion improver into a suspended smelting reduction furnace, controlling the furnace temperature at 1450 ℃, reacting for 5 seconds, completing the whole smelting reduction reaction of the zinc ash, smelting and reducing iron in the zinc ash into molten iron, entering a molten pool, and periodically discharging the molten iron from a molten iron outlet, wherein non-volatile and non-fusible residues are periodically discharged from a slag outlet. The mixed high-temperature gas of zinc-containing steam and dust is discharged from a zinc-containing steam and dust high-temperature gas outlet and enters a cyclone dust collector for dust removal, the high-temperature gas flow of the zinc-containing steam after dust removal enters an oxidation chamber to be oxidized into zinc oxide, then the high-temperature gas flow containing the zinc oxide enters a waste heat utilization device to produce steam and electricity as by-products, then the gas flow containing the zinc oxide and other dust is cooled to below 200 ℃ and enters a zinc oxide collection device to collect the zinc oxide, and the gas after collecting the zinc oxide dust is treated and discharged after reaching the. And (3) the collected secondary zinc oxide enters a wet process section and is used for producing the nano zinc oxide by an acid leaching process.
Example three:
hot air containing zinc ash, reducing agent semi-coke and combustion improver at 1200 ℃ is sent into a suspension smelting reduction furnace, the furnace temperature is controlled at 1300 ℃ and the reaction time is 6 seconds, the whole smelting reduction reaction of the zinc ash is completed, iron in the zinc ash is smelted and reduced into molten iron, the molten iron enters a molten pool and is periodically discharged from a molten iron outlet, and non-volatile and non-fusible residues are periodically discharged from a slag outlet. The mixed high-temperature gas of zinc-containing steam and dust is discharged from a zinc-containing steam and dust high-temperature gas outlet and enters a cyclone dust collector for dust removal, the high-temperature gas flow of the zinc-containing steam after dust removal enters an oxidation chamber to be oxidized into zinc oxide, then the high-temperature gas flow containing the zinc oxide enters a waste heat utilization device to produce steam and electricity as by-products, then the gas flow containing the zinc oxide and other dust is cooled to below 200 ℃ and enters a zinc oxide collection device to collect the zinc oxide, and the gas after collecting the zinc oxide dust is treated and discharged after reaching the. And (3) the collected secondary zinc oxide enters a wet process section and is used for producing the nano zinc oxide by an acid leaching process.
Example four:
hot air containing zinc ash, reducing agent CO and combustion improver at 800 ℃ is sent into a suspension smelting reduction furnace, the furnace temperature is controlled at 1400 ℃, the reaction time is 4 seconds, the whole smelting reduction reaction of the zinc ash is completed, iron in the zinc ash is smelted and reduced into molten iron, the molten iron enters a molten pool and is periodically discharged from a molten iron outlet, and non-volatile and non-fusible residues are periodically discharged from a slag outlet. The mixed high-temperature gas of zinc-containing steam and dust is discharged from a zinc-containing steam and dust high-temperature gas outlet and enters a cyclone dust collector for dust removal, the high-temperature gas flow of the zinc-containing steam after dust removal enters an oxidation chamber to be oxidized into zinc oxide, then the high-temperature gas flow containing the zinc oxide enters a waste heat utilization device to produce steam and electricity as by-products, then the gas flow containing the zinc oxide and other dust is cooled to below 200 ℃ and enters a zinc oxide collection device to collect the zinc oxide, and the gas after collecting the zinc oxide dust is treated and discharged after reaching the. The collected secondary zinc oxide enters a wet process section and is used for producing the nano zinc oxide by an ammonia leaching process.
Example five:
mixing zinc-containing ash and reducing agent H2And hot air with 1000 ℃ of combustion improver is fed into the suspension smelting reduction furnace, the temperature of the furnace is controlled at 1500 ℃, the reaction time is 3 seconds, the whole smelting reduction reaction containing zinc ash is completed, iron in the zinc ash is smelted and reduced into molten iron, the molten iron enters a molten pool and is periodically discharged from a molten iron outlet, and non-volatile and non-fusible residues are periodically discharged from a slag outlet. The mixed high-temperature gas of zinc-containing steam and dust is discharged from a zinc-containing steam and dust high-temperature gas outlet and enters a cyclone separator for dust removal, the high-temperature airflow of the zinc-containing steam after dust removal enters an oxidation chamber to be oxidized into zinc oxide, then the high-temperature airflow containing the zinc oxide enters a waste heat utilization device to produce steam and electricity as by-products, then the airflow containing the zinc oxide and other dust is cooled to below 200 ℃ and enters a zinc oxide collection device to collect the zinc oxide, and the gas after collecting the zinc oxide dust is treated and discharged after reaching the standard. The collected secondary zinc oxide enters a wet process section and is used for producing the nano zinc oxide by an ammonia leaching process.
Example six:
and (2) feeding zinc ash, reducing agent coke and combustion improver oxygen into a suspension smelting reduction furnace, controlling the furnace temperature at 1450 ℃, and reacting for 4 seconds to complete the whole smelting reduction reaction of the zinc ash, smelting and reducing iron in the zinc ash into molten iron, entering a molten pool, and periodically discharging the molten iron from a molten iron outlet, wherein non-volatile and non-fusible residues are periodically discharged from a slag outlet. The mixed high-temperature gas of zinc-containing steam and dust is discharged from a zinc-containing steam and dust high-temperature gas outlet and enters a cyclone dust collector for dust removal, the high-temperature gas flow of the zinc-containing steam after dust removal enters an oxidation chamber to be oxidized into zinc oxide, then the high-temperature gas flow containing the zinc oxide enters a waste heat utilization device to produce steam and electricity as by-products, then the gas flow containing the zinc oxide and other dust is cooled to below 200 ℃ and enters a zinc oxide collection device to collect the zinc oxide, and the gas after collecting the zinc oxide dust is treated and discharged after reaching the. The collected secondary zinc oxide enters a wet process section and is used for producing the nano zinc oxide by an ammonia leaching process.
Claims (10)
1. A treatment and utilization device for recovering zinc oxide by smelting reduction in a suspension state of metallurgical zinc-containing ash is characterized in that: comprises a suspended state smelting reduction furnace and an integrated complete device for zinc vapor oxidation recovery and waste heat recovery;
the suspension smelting reduction furnace is a vertical cylindrical furnace with a water-cooled wall and a refractory lining, and the top of the furnace body is provided with a zinc-containing ash inlet, a reducing agent inlet and a combustion improver hot air or oxygen inlet; a molten pool is arranged at the lower part of the furnace body; a slag outlet and a molten iron outlet; the upper side of the molten pool is provided with a high-temperature airflow outlet containing zinc vapor and dust;
the zinc vapor oxidation recovery and waste heat recovery integrated device is a cyclone dust collector, an oxidation chamber, a waste heat utilization device and a zinc oxide dust collection device which are sequentially connected outside a high-temperature airflow outlet containing zinc vapor and dust, wherein the zinc oxide dust collection device is respectively connected with a wet process nano zinc oxide production device and a tail gas standard discharge device;
the oxidation chamber is provided with a cold air or oxygen inlet.
2. The treatment and utilization device for the recovery of zinc oxide by the smelting reduction of the metallurgical zinc-containing ash in a suspended state according to claim 1, characterized in that: the suspended smelting reduction furnace is provided with a water cooling wall device; the vertical cylindrical furnace is circular, square or polygonal.
3. The treatment and utilization device for the recovery of zinc oxide by the smelting reduction of the metallurgical zinc-containing ash in a suspended state according to claim 1, characterized in that: and a molten iron desulphurization tank is connected outside the molten iron outlet of the smelting reduction furnace.
4. The treatment and utilization device for the recovery of zinc oxide by the smelting reduction of the metallurgical zinc-containing ash in a suspended state according to claim 1, characterized in that: according to the smelting reduction furnace, the high-density SiAiON-based refractory material is combined with the silicon carbide-based bricks as the refractory material, and the high-alumina phosphate slurry is used for masonry, so that the zinc erosion resistance of a furnace lining is improved.
5. A method for treating and utilizing zinc oxide recovered by smelting reduction in a suspended state of metallurgical zinc-containing ash, which is characterized in that the treatment and utilization device for recovering the zinc oxide by smelting reduction in a suspended state of metallurgical zinc-containing ash is adopted in any one of claims 1 to 4, and is characterized in that:
the method comprises the steps of mixing zinc-containing ash, a reducing agent and a combustion improver from an inlet at the top of a furnace body and spraying the mixture into the furnace body;
(2) after the materials enter the furnace body, the materials are dispersed and fall in a suspension state from top to bottom by an approximate cylinder to complete the melting reduction reaction;
(3) reducing iron oxide in the zinc-containing ash into molten iron, enabling the molten iron to fall into a molten pool at the lower part, floating the molten slag on the molten iron, and pumping high-temperature gas containing zinc vapor and other dust out of a high-temperature gas flow outlet containing the zinc vapor and the dust;
(4) molten iron is periodically discharged from a molten iron outlet at the lower part of the smelting reduction furnace and enters a molten iron desulphurization tank for desulphurization, and the desulphurized molten iron is sent to the next process; other non-volatile, non-meltable residues are periodically discharged from a tap hole in the middle of the smelting reduction furnace.
6. The method for treating and utilizing the metallurgical zinc-containing ash suspended smelting reduction recovered zinc oxide according to claim 5, wherein the method comprises the following steps: the temperature of the melting reduction furnace is controlled at 1300-1550 ℃.
7. The method for treating and utilizing the metallurgical zinc-containing ash suspended smelting reduction recovered zinc oxide according to claim 5, wherein the method comprises the following steps: the combustion improver oxygen is pure oxygen, and the temperature of the combustion improver hot air is 800-1200 ℃; the reducing agent is any one of anthracite, semi-coke, carbon monoxide and hydrogen or a mixed gas of the carbon monoxide and the hydrogen;
the granularity of the zinc-containing ash and anthracite or semi coke or coke which is taken as a reducing agent entering the suspension smelting reduction furnace is less than 300 meshes.
8. The method for treating and utilizing the metallurgical zinc-containing ash suspended smelting reduction recovered zinc oxide according to claim 5, wherein the method comprises the following steps: the suspension melting reduction reaction is completed within 2-6 seconds.
9. The method for treating and utilizing the metallurgical zinc-containing ash suspended smelting reduction recovered zinc oxide according to claim 5, wherein the method comprises the following steps: the zinc-containing steam and the high-temperature dust airflow which are extracted from the zinc-containing steam and high-temperature dust gas outlet are dedusted by a cyclone deduster, the zinc-containing steam airflow enters an oxidation chamber, the zinc steam is oxidized into zinc oxide, other low-temperature volatile metal vapors are oxidized into other oxides, the high-temperature gas containing the zinc oxide and other oxide dust enters a waste heat utilization device to recover waste heat, the zinc-containing airflow which is cooled to below 200 ℃ enters a zinc oxide collection device to collect the zinc oxide and other dust, and tail gas reaches the standard and is discharged;
the zinc oxide and other dust collected from the zinc oxide collecting device enter a wet process section to produce the nano zinc oxide by an ammonia leaching method or an acid leaching method.
10. The method for treating and utilizing metallurgical zinc-containing ash according to claim 5, wherein the method comprises the following steps: in the zinc-containing vapor and dust high-temperature gas flow extracted from the zinc-containing vapor and dust high-temperature gas outlet, the content of reducing agent carbon monoxide or hydrogen or the mixed gas of carbon monoxide and hydrogen is less than 10%.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113247945A (en) * | 2021-05-20 | 2021-08-13 | 山西于斯为盛环保科技有限公司 | Device and method for synthesizing zinc oxide by zinc vapor in metallurgical zinc-containing ash treatment process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113247945A (en) * | 2021-05-20 | 2021-08-13 | 山西于斯为盛环保科技有限公司 | Device and method for synthesizing zinc oxide by zinc vapor in metallurgical zinc-containing ash treatment process |
| CN113247945B (en) * | 2021-05-20 | 2023-03-14 | 山西于斯为盛环保科技有限公司 | Device and method for synthesizing zinc oxide by zinc vapor in metallurgical zinc-containing ash treatment process |
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