A device and method for treating and utilizing metallurgical zinc-containing ash suspension state smelting reduction to recover zinc oxide

Abstract

The application discloses a device and a method for treating and utilizing metallurgical zinc-containing ash in a suspension state by means of smelting reduction and recovery of zinc oxide. The device comprises a suspension smelting reduction furnace and a zinc vapor oxidation collection and waste heat recovery integrated complete device. The application completely abandons traditional rotary furnaces and smelting reduction furnaces, and makes a brand-new technical innovation, thereby forming a production device and a method for treating and utilizing zinc-containing ash in a suspension state by means of smelting reduction, and realizing a complete treatment and utilization of high and low zinc-containing ash by means of one-step method. The application has obvious novelty, creativity and practicability.

Description

TECHNICAL FIELD

[0001] The present application relates to a device and method for treating and utilizing metallurgical zinc-containing ash, belonging to the technical field of environmental protection and energy saving. BACKGROUND

[0002] With the development of steel smelting and lead-zinc smelting industry, the amount of zinc-containing ash to be treated has increased significantly. For example, the steel industry produces 2000 tons of zinc-containing ash per year, and a large part of it is hazardous waste, which increases the environmental protection pressure of solid waste treatment in the metallurgical industry. There are many methods for treating and utilizing zinc-containing ash, such as rotary kiln technology, rotary hearth furnace technology, small blast furnace technology, molten iron furnace technology, and direct wet process technology. Patent technologies such as Chinese patent ZL2016 1 0145017.5 and Chinese patent ZL, 2018 2 1915981.2. These patents or technologies have different defects such as large investment, incomplete zinc removal, long process, and incomplete recovery of iron in slag. Therefore, it is necessary to provide a new technology with low investment, short process, complete zinc removal, and efficient recovery of iron in slag for environmental protection and solid waste treatment in the metallurgical industry. SUMMARY

[0003] The present application aims to provide a device and method for treating and utilizing metallurgical zinc-containing ash with low investment, short process, complete zinc removal, and efficient recovery of iron in slag, which is an urgent need for environmental protection.

[0004] The present application provides a device and method for treating and utilizing zinc-containing ash in the metallurgical industry, focusing on short process, low investment, high zinc removal rate, and one-step treatment of high and low zinc-containing ash, which conforms to the national industrial policy and realizes harmless treatment and resource utilization of low zinc-containing ash. The present application has significant novelty, creativity, and practicality. The present application treats and utilizes metallurgical zinc-containing ash with a zinc recovery rate of more than 95%, and the iron is recovered in the form of molten iron with a recovery rate of more than 95%. The zinc content of the recovered secondary zinc oxide is more than 56%, achieving efficient recovery and utilization of various metallurgical zinc-containing ash. The present application is an innovative device and method for complete treatment and utilization of various zinc-containing ash in the metallurgical industry and efficient recovery of iron in slag.

[0005] The present application provides a device for treating and utilizing metallurgical zinc-containing ash, which includes a suspension smelting reduction furnace and an integrated device for zinc vapor oxidation and recovery and waste heat recovery and utilization.

[0006] The suspension smelting reduction furnace is a vertical cylindrical furnace (circular, square, or polygonal) lined with refractory material with a water-cooled wall. The furnace body has a zinc-containing ash inlet, a reducing agent inlet, and a combustion-supporting agent hot air or oxygen inlet at the top. The furnace body has a molten pool at the lower part, a slag outlet, and a molten iron outlet. The molten pool has a high-temperature gas stream outlet for zinc vapor and dust on the upper side.

[0007] The zinc vapor oxidation recovery device is connected with a cyclone dust collector, an oxidation chamber, a waste heat utilization device and a zinc oxide dust collecting device in sequence from the zinc vapor and dust outlet.

[0008] The oxidation chamber has a cold air or oxygen inlet.

[0009] The metallurgical zinc-containing dust treatment and utilization device has a water-cooled wall device.

[0010] The metallurgical zinc-containing dust treatment and utilization device has a molten reduction furnace connected with a molten iron desulfurization tank outside the molten iron outlet.

[0011] The metallurgical zinc-containing dust treatment and utilization device has a molten reduction furnace, in which high-density SiAlON-based refractory material combined with silicon carbide-based bricks is used, and high-aluminum phosphate slurry is used for masonry to improve the zinc corrosion resistance of the furnace lining.

[0012] The metallurgical zinc-containing dust treatment and utilization device is provided with a metallurgical zinc-containing dust treatment and utilization method, which comprises the following steps:

[0013] (1) zinc-containing dust (zinc content is not limited) and a reducing agent, hot air or oxygen are mixed and sprayed into the furnace from the inlet at the top of the furnace body;

[0014] (2) after the zinc-containing dust and the reducing agent, hot air or oxygen and other materials enter the furnace body, a reduction reaction is completed by the approximate cylindrical self-suspended state dispersion and falling from top to bottom;

[0015] (3) the iron oxide in the zinc-containing dust is reduced to molten iron and falls into the lower molten pool, the molten slag floats on the molten iron, and zinc vapor and other dust are extracted from the zinc vapor and dust outlet;

[0016] (4) the molten iron outlet at the lower part of the molten reduction furnace is regularly discharged into the molten iron desulfurization tank for desulfurization, and the desulfurized molten iron is sent to the next process; other non-volatile and non-meltable residues are regularly discharged from the slag outlet in the middle of the molten reduction furnace.

[0017] The metallurgical zinc-containing dust treatment and utilization method controls the temperature of the molten reduction furnace at 1300-1550℃.

[0018] The metallurgical zinc-containing dust treatment and utilization method uses pure oxygen as the combustion-supporting oxygen, and the hot air temperature is 800-1200℃; the reducing agent is any one of anthracite, semi-coke, coke, carbon monoxide and hydrogen, or a mixed gas of carbon monoxide and hydrogen.

[0019] The metallurgical zinc-containing ash treatment and utilization method is characterized in that the suspension state smelting reduction reaction is completed within 2-6 seconds;

[0020] The metallurgical zinc-containing ash treatment and utilization method is characterized in that the particle size of the zinc-containing ash entering the suspension state smelting reduction furnace and the particle size of the anthracite or semi-coke or coke serving as the reducing agent are less than 300 mesh;

[0021] The metallurgical zinc-containing ash treatment and utilization method is characterized in that the zinc-containing steam and dust high-temperature gas flow extracted from the high-temperature gas outlet is subjected to dust removal through a cyclone dust collector, the zinc-containing steam high-temperature gas flow enters an oxidation chamber to oxidize zinc steam into zinc oxide and other low-temperature volatile metal steam into other oxides, the zinc oxide and other oxide-containing high-temperature gas enters a waste heat utilization device to recover waste heat and is cooled to below 200 DEG C, the zinc oxide and other dust-containing gas flow enters a zinc oxide collection device to collect zinc oxide and other dust, and tail gas is discharged up to standard;

[0022] The metallurgical zinc-containing ash treatment and utilization method is characterized in that the content of carbon monoxide or hydrogen or the mixed gas of carbon monoxide and hydrogen in the reducing agent in the zinc-containing steam and dust high-temperature gas flow extracted from the high-temperature gas outlet is less than 10%;

[0023] The metallurgical zinc-containing ash treatment and utilization method is characterized in that the zinc oxide and other dust collected from the zinc oxide collection device enter a wet process section to produce nano zinc oxide through ammonia leaching or acid leaching.

[0024] The technical features and beneficial effects of the present application are as follows: a, the zinc in the zinc-containing ash is removed at a high removal rate through a suspension state smelting reduction furnace and a zinc steam oxidation collection and waste heat recovery and utilization integrated complete device in a one-step method, and the zinc-containing ash treatment and utilization process is significantly shortened; b, all zinc-containing ash solid waste resources containing 0.1-10% and above of zinc can be completely utilized in a one-step method, and the zinc-containing ash treatment and utilization rate is greatly improved; c, the suspension state smelting reduction furnace and the zinc steam oxidation collection and waste heat recovery and utilization integrated complete device are operated under full negative pressure, and the environmental pollution is small; d, the by-product iron is reduced into molten iron and then desulfurized into low-sulfur molten iron, and the quality of the by-product pig iron is improved. BRIEF DESCRIPTION OF DRAWINGS

[0025] Fig. 1 It is a process flow block diagram of the zinc-containing ash treatment and utilization device of the present application.

[0026] Fig. 2 It is a schematic diagram of the suspension state smelting reduction and zinc oxide recovery complete device of the present application.

[0027] Figure: 1. Suspended state smelting reduction zone, 2. Slag layer zone, 3. Molten pool, 4. Zinc-containing ash inlet, 5. Reducing agent inlet, 6. Hot air or oxygen inlet, 7. Slag outlet, 8. Molten iron outlet, 9. Molten iron desulfurization tank, 10. Zinc-containing vapor, dust and high-temperature gas stream outlet, 11. Cyclone dust collector, 12. Oxidation chamber, 13. Cold air or oxygen inlet, 14. Waste heat utilization device, 15. Zinc oxide dust collection device, 16. Wet-process nano-zinc oxide production device, 17. Tail gas emission device. DETAILED DESCRIPTION

[0028] The present application is further illustrated by the following examples, but is not limited to the following examples.

[0029] As shown in the figure, a metallurgical zinc-containing ash treatment and utilization device comprises a suspended state smelting reduction furnace and a zinc vapor oxidation collection and waste heat recovery utilization integrated device. Figs. 1-2

[0030] The suspended state smelting reduction furnace of the integrated device comprises: 1. Suspended state smelting reduction zone, 2. Slag layer zone, 3. Molten pool, 4. Zinc-containing ash inlet, 5. Reducing agent inlet, 6. Hot air or oxygen inlet, 7. Slag outlet, 8. Molten iron outlet, 9. Molten iron desulfurization tank, 10. Zinc-containing vapor, dust and high-temperature gas stream outlet.

[0031] The zinc vapor oxidation collection and waste heat recovery utilization device of the integrated device comprises: 11. Cyclone dust collector, 12. Oxidation chamber, 13. Cold air or oxygen inlet, 14. Waste heat utilization device, 15. Zinc oxide dust collection device, 16. Wet-process nano-zinc oxide production device, 17. Tail gas emission device.

[0032] The suspended state smelting reduction furnace has a water-cooled wall device.

[0033] The suspended state smelting reduction furnace uses high-density SiAlON-based refractory material combined with silicon carbide-based bricks, and high-alumina phosphate mud is used for masonry to improve the zinc corrosion resistance of the furnace lining.

[0034] The present application provides a metallurgical zinc-containing ash treatment and utilization method, which adopts the above device and comprises the following steps:

[0035] (1) Zinc-containing ash (zinc content is not limited) and reducing agent, hot air or oxygen are mixed and sprayed into the suspended state smelting reduction furnace from the top inlet of the furnace body;

[0036] (2) After the zinc-containing ash and the reducing agent, hot air or oxygen and other materials enter the furnace body, a reduction reaction is completed by the approximate cylindrical self-suspended state dispersion and downward falling;

[0037] ​(3) The iron oxide in the zinc-containing ash is reduced to molten iron which falls into the lower molten pool, and the slag floats on the molten iron, and the zinc vapor and other dust are extracted from the zinc vapor and dust high-temperature gas outlet:

[0038] (4) The molten iron outlet at the lower part of the smelting reduction furnace periodically discharges the molten iron into a molten iron desulfurization tank for desulfurization, and the desulfurized molten iron is sent to the next process; and other non-volatile and non-meltable residues are periodically discharged from the slag outlet at the middle part of the suspension smelting reduction furnace.

[0039] The temperature of the smelting reduction furnace is controlled at 1300-1550℃.

[0040] The combustion-supporting oxygen is pure oxygen or hot air, and the temperature of the hot air is 800-1200℃.

[0041] The reducing agent is any one of anthracite, semi-coke, coke, carbon monoxide, hydrogen, or a mixed gas of carbon monoxide and hydrogen.

[0042] The reaction of the material entering the suspension smelting reduction furnace is completed within 2-6 seconds.

[0043] The particle size of the zinc-containing ash and the anthracite or semi-coke or coke as the reducing agent entering the suspension smelting reduction furnace is less than 300 mesh.

[0044] The zinc-containing vapor and dust high-temperature gas stream extracted from the zinc vapor and dust high-temperature gas outlet is subjected to dust removal by a cyclone dust collector, the zinc-containing vapor high-temperature gas stream enters an oxidation chamber to oxidize the zinc vapor 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 recovery device to recover waste heat and is cooled to a temperature below 200℃, the zinc oxide and other dust-containing gas stream enters a zinc oxide collection device to collect the zinc oxide and other dust, and the tail gas is discharged up to the standard;

[0045] The content of carbon monoxide or hydrogen or the mixed gas of carbon monoxide and hydrogen in the reducing agent in the zinc-containing vapor and dust high-temperature gas stream extracted from the zinc vapor and dust high-temperature gas outlet is less than 10%.

[0046] The zinc oxide and other dust collected from the zinc oxide collection device enter a wet process section to produce nano zinc oxide by ammonia leaching or acid leaching.

[0047] The suspension smelting reduction furnace and the zinc vapor oxidation and collection and waste heat recovery and utilization integrated complete device are operated under full negative pressure.

[0048] The above percentages are all weight percentages.

[0049] The method for treating and utilizing metallurgical zinc-containing ash by the above complete device will be described in detail below through a specific implementation process.

[0050] Example 1

[0051] The zinc-containing ash and the reducing agent CO+H2 and the combustion-supporting agent oxygen are fed into the suspension state smelting reduction furnace, the furnace temperature is controlled at 1550°C, the reaction time is 2 seconds, the complete smelting reduction reaction of the zinc-containing ash is completed, the iron in the zinc-containing ash is smelted and reduced into molten iron into the molten pool, is periodically discharged from the molten iron outlet, the non-volatile and non-fusible residues are periodically discharged from the slag outlet. The zinc-containing vapor and dust mixed high-temperature gas is discharged from the zinc-containing vapor and dust high-temperature gas outlet into the cyclone dust collector for dust removal, the zinc-containing vapor high-temperature gas flow after dust removal is into the oxidation chamber to be oxidized into zinc oxide, the zinc oxide containing high-temperature gas flow is then into the waste heat utilization device to produce steam and electricity as by-products, the zinc oxide containing and other dust gas flow after being cooled to below 200°C is into the zinc oxide collecting device to collect zinc oxide, the gas after collecting zinc oxide dust is treated and discharged up to the standard. The collected secondary zinc oxide is into the wet process section to produce nano zinc oxide by the ammonia leaching process.

[0052] Example Two:

[0053] The zinc-containing ash and the reducing agent anthracite and the combustion-supporting agent oxygen are fed into the suspension state smelting reduction furnace, the furnace temperature is controlled at 1450°C, the reaction time is 5 seconds, the complete smelting reduction reaction of the zinc-containing ash is completed, the iron in the zinc-containing ash is smelted and reduced into molten iron into the molten pool, is periodically discharged from the molten iron outlet, the non-volatile and non-fusible residues are periodically discharged from the slag outlet. The zinc-containing vapor and dust mixed high-temperature gas is discharged from the zinc-containing vapor and dust high-temperature gas outlet into the cyclone dust collector for dust removal, the zinc-containing vapor high-temperature gas flow after dust removal is into the oxidation chamber to be oxidized into zinc oxide, the zinc oxide containing high-temperature gas flow is then into the waste heat utilization device to produce steam and electricity as by-products, the zinc oxide containing and other dust gas flow after being cooled to below 200°C is into the zinc oxide collecting device to collect zinc oxide, the gas after collecting zinc oxide dust is treated and discharged up to the standard. The collected secondary zinc oxide is into the wet process section to produce nano zinc oxide by the acid leaching process.

[0054] Example Three:

[0055] The zinc-containing ash and the reducing agent semi-coke and the combustion-supporting agent 1200°C hot air are fed into the suspension state smelting reduction furnace, the furnace temperature is controlled at 1300°C, the reaction time is 6 seconds, the complete smelting reduction reaction of the zinc-containing ash is completed, the iron in the zinc-containing ash is smelted and reduced into molten iron into the molten pool, is periodically discharged from the molten iron outlet, the non-volatile and non-fusible residues are periodically discharged from the slag outlet. The zinc-containing vapor and dust mixed high-temperature gas is discharged from the zinc-containing vapor and dust high-temperature gas outlet into the cyclone dust collector for dust removal, the zinc-containing vapor high-temperature gas flow after dust removal is into the oxidation chamber to be oxidized into zinc oxide, the zinc oxide containing high-temperature gas flow is then into the waste heat utilization device to produce steam and electricity as by-products, the zinc oxide containing and other dust gas flow after being cooled to below 200°C is into the zinc oxide collecting device to collect zinc oxide, the gas after collecting zinc oxide dust is treated and discharged up to the standard. The collected secondary zinc oxide is into the wet process section to produce nano zinc oxide by the acid leaching process.

[0056] Example Four

[0057] The zinc-containing ash and reducing agent CO and combustion-supporting agent 800℃ hot air are sent into the suspension state smelting reduction furnace, the furnace temperature is controlled at 1400℃, the reaction time is 4 seconds, the complete smelting reduction reaction of the zinc-containing ash is completed, the iron in the zinc-containing ash is smelted and reduced into molten iron into the molten pool, which is periodically discharged from the molten iron outlet, the non-volatile and non-fusible residues are periodically discharged from the slag outlet. The zinc-containing vapor and dust mixed high-temperature gas is discharged from the zinc-containing vapor and dust high-temperature gas outlet into the cyclone dust collector for dust removal, the zinc-containing vapor high-temperature gas flow after dust removal is oxidized into zinc oxide in the oxidation chamber, then the zinc oxide-containing high-temperature gas flow enters the waste heat utilization device to produce steam and electricity as by-products, then the zinc oxide-containing and other dust gas flow after being cooled to below 200℃ enters the zinc oxide collection device to collect zinc oxide, the gas after collecting zinc oxide dust is treated and discharged up to the standard. The collected secondary zinc oxide enters the wet process section to produce nano zinc oxide by ammonia leaching process.

[0058] Example Five

[0059] The zinc-containing ash and reducing agent H2 and combustion-supporting agent 1000℃ hot air are sent into the suspension state smelting reduction furnace, the furnace temperature is controlled at 1500℃, the reaction time is 3 seconds, the complete smelting reduction reaction of the zinc-containing ash is completed, the iron in the zinc-containing ash is smelted and reduced into molten iron into the molten pool, which is periodically discharged from the molten iron outlet, the non-volatile and non-fusible residues are periodically discharged from the slag outlet. The zinc-containing vapor and dust mixed high-temperature gas is discharged from the zinc-containing vapor and dust high-temperature gas outlet into the cyclone dust collector for dust removal, the zinc-containing vapor high-temperature gas flow after dust removal is oxidized into zinc oxide in the oxidation chamber, then the zinc oxide-containing high-temperature gas flow enters the waste heat utilization device to produce steam and electricity as by-products, then the zinc oxide-containing and other dust gas flow after being cooled to below 200℃ enters the zinc oxide collection device to collect zinc oxide, the gas after collecting zinc oxide dust is treated and discharged up to the standard. The collected secondary zinc oxide enters the wet process section to produce nano zinc oxide by ammonia leaching process.

[0060] Example Six

[0061] The zinc-containing ash and reducing agent coke and combustion-supporting agent oxygen are sent into the suspension state smelting reduction furnace, the furnace temperature is controlled at 1450℃, the reaction time is 4 seconds, the complete smelting reduction reaction of the zinc-containing ash is completed, the iron in the zinc-containing ash is smelted and reduced into molten iron into the molten pool, which is periodically discharged from the molten iron outlet, the non-volatile and non-fusible residues are periodically discharged from the slag outlet. The zinc-containing vapor and dust mixed high-temperature gas is discharged from the zinc-containing vapor and dust high-temperature gas outlet into the cyclone dust collector for dust removal, the zinc-containing vapor high-temperature gas flow after dust removal is oxidized into zinc oxide in the oxidation chamber, then the zinc oxide-containing high-temperature gas flow enters the waste heat utilization device to produce steam and electricity as by-products, then the zinc oxide-containing and other dust gas flow after being cooled to below 200℃ enters the zinc oxide collection device to collect zinc oxide, the gas after collecting zinc oxide dust is treated and discharged up to the standard. The collected secondary zinc oxide enters the wet process section to produce nano zinc oxide by ammonia leaching process.

Claims

1. A device for the treatment and utilization of zinc oxide recovered from zinc-containing ash suspension by molten reduction in metallurgy, characterized in that: The device comprises a suspension state smelting reduction furnace and a zinc vapor oxidation recovery and waste heat recovery integrated complete device. The suspension state smelting reduction furnace is a vertical cylindrical furnace with a water-cooled wall and lined with refractory material, and has a zinc-containing ash inlet, a reducing agent inlet and a combustion-supporting agent oxygen inlet on the top of the furnace body; the lower part of the furnace body has a molten pool; the molten pool has a slag outlet and a molten iron outlet; the upper side of the molten pool has a high-temperature gas stream outlet containing zinc vapor and dust; the smelting reduction furnace uses high-density SiAlON-based refractory material combined with silicon carbide-based bricks, and high-alumina phosphate mud is used for masonry to improve the zinc corrosion resistance of the furnace lining. The zinc vapor oxidation recovery and waste heat recovery integrated complete device is connected in sequence outside the high-temperature gas stream outlet containing zinc vapor and dust, and comprises a cyclone dust collector, an oxidation chamber, a waste heat utilization device and a zinc oxide dust collecting device; the zinc oxide dust collecting device is connected with a wet-process nano-zinc oxide production device and a tail gas emission device. The oxidation chamber has a cold air or oxygen inlet. The device recovers more than 95% of zinc and more than 95% of iron in the form of molten iron from metallurgical zinc-containing ash. The method for treating and utilizing metallurgical zinc-containing ash by the device comprises the following steps: (1) mixing and spraying the zinc-containing ash and reducing agent and combustion-supporting agent into the furnace body from the inlets on the top of the furnace body; the reducing agent is any one of anthracite, semi-coke, coke, carbon monoxide and hydrogen or a mixture of carbon monoxide and hydrogen; (2) the above-mentioned materials enter the furnace body and complete the smelting reduction reaction in a suspended state from top to bottom in the form of a nearly cylindrical body; the suspension state smelting reduction reaction is completed in 2-6 seconds; (3) the iron oxide in the zinc-containing ash is reduced to molten iron and falls into the lower molten pool, and the molten slag floats on the molten iron; the high-temperature gas containing zinc vapor and other dust is extracted from the high-temperature gas stream outlet containing zinc vapor and dust; (4) the molten iron outlet of the smelting reduction furnace periodically discharges molten iron into a molten iron desulfurization tank for desulfurization, and the desulfurized molten iron is sent to the next process; other non-volatile and non-meltable residues are periodically discharged from the slag outlet in the middle of the smelting reduction furnace.

2. The metallurgical zinc-containing ash suspension state smelting reduction recovery of zinc oxide governance and utilization device according to claim 1, characterized in that: The suspension state smelting reduction furnace has a water-cooled wall device; the vertical cylindrical furnace is circular or polygonal.

3. The metallurgical zinc-containing ash suspension state smelting reduction recovery of zinc oxide governance and utilization device according to claim 1, characterized in that: The smelting reduction furnace is connected with a molten iron desulfurization tank outside the molten iron outlet.

4. The metallurgical zinc-containing ash suspension state smelting reduction recovery of zinc oxide governance and utilization device according to claim 1, characterized in that: The temperature of the smelting reduction furnace is controlled at 1300-1550℃.

5. The metallurgical zinc-containing ash suspension state smelting reduction recovery of zinc oxide governance and utilization device according to claim 1, characterized in that: The combustion-supporting agent oxygen is pure oxygen; the particle size of the zinc-containing ash and anthracite or semi-coke or coke as the reducing agent entering the suspension state smelting reduction furnace is less than 300 mesh.

6. The metallurgical zinc-containing ash suspension state smelting reduction recovery of zinc oxide governance and utilization device according to claim 1, characterized in that: The high-temperature gas stream containing zinc vapor and dust extracted from the high-temperature gas outlet containing zinc vapor and dust is subjected to dust removal by a cyclone dust collector; the zinc vapor gas stream enters an oxidation chamber, and the zinc vapor is oxidized to zinc oxide, and other low-temperature volatile metal vapors are oxidized to other oxides; the high-temperature gas containing zinc oxide and other oxide dust enters a waste heat utilization device to recover waste heat, and the zinc oxide-containing gas stream cooled to below 200℃ enters a zinc oxide collecting device to collect zinc oxide and other dust, and the tail gas is discharged to meet the standard; The zinc oxide and other dust collected from the zinc oxide collecting device enter a wet-process section to produce nano-zinc oxide by ammonia leaching or acid leaching.

7. The metallurgical zinc-containing ash suspension state smelting reduction recovery of zinc oxide governance and utilization device according to claim 1, characterized in that: The content of the reducing agent, carbon monoxide or hydrogen or the mixed gas of carbon monoxide and hydrogen, in the high-temperature gas stream containing zinc vapor and dust drawn from the high-temperature gas outlet is less than 10%. The content of the reducing agent, carbon monoxide or hydrogen or the mixed gas of carbon monoxide and hydrogen, in the high-temperature gas stream containing zinc vapor and dust drawn from the high-temperature gas outlet is less than 10%.

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