CN210215430U

CN210215430U - Zero-carbon-emission steelmaking equipment

Info

Publication number: CN210215430U
Application number: CN201920966536.7U
Authority: CN
Inventors: Yong Zhou; 周勇; Zhenming Chen; 陈珍明; Fuwang Mo; 莫福旺; Peng Li; 李鹏; Shi Wei; 韦师
Original assignee: Hezhou University
Current assignee: Hezhou University
Priority date: 2019-06-25
Filing date: 2019-06-25
Publication date: 2020-03-31
Anticipated expiration: 2029-06-25

Abstract

The utility model discloses a zero carbon discharges steelmaking equipment, concretely relates to steel production facility field, including ground ore powder equipment, fine ore hoisting equipment, multistage cyclone preheater, reduce circulating fluidized bed in advance, reduce circulating fluidized bed, electric arc furnace, aerogenerator, water electrolysis hydrogen manufacturing equipment, first gas heat exchanger, gaseous supercharging equipment, second gas heat exchanger, third gas heat exchanger, gas purification equipment, fourth gas heat exchanger, gaseous desorption water equipment. The utility model discloses a pollution problem has thoroughly been solved in hydrogen reduction iron ore steelmaking, has not only avoided environmental pollution, has also avoided the pollution to steel itself, the suitable ultrapure steel of production. The utility model discloses an electric power derives from non-grid-connected wind-powered electricity generation, makes hydrogen with non-grid-connected wind-powered electricity generation, and electricity generation and hydrogen manufacturing process do not all have carbon to discharge and produce, and wind-powered electricity generation also can be used to the electric arc furnace steelmaking, the utility model discloses can obtain zero carbon and discharge the result of steelmaking, this equipment is zero carbon and discharges green steelmaking equipment.

Description

Zero-carbon-emission steelmaking equipment

Technical Field

The utility model relates to a steel production facility technical field, more specifically say, the utility model relates to a zero carbon emission steelmaking equipment.

Background

The current most popular steel production process (long process) obtains molten steel from iron ore, four main process links of sintering (or pelletizing), coking, blast furnace ironmaking and converter steelmaking are needed, and a plurality of auxiliary process links are also needed, wherein more than 70% of reduction of iron ore in blast furnace ironmaking is indirect reduction, which belongs to gas-solid reaction and requires good air permeability of a blast furnace, so that iron concentrate powder and rich lump ore powder obtained after lean ore dressing can be used by the blast furnace only through agglomeration, namely, through the sintering (or pelletizing) process, the material handling capacity of sintering (or pelletizing) occupies the second place (only after ironmaking production) of a steel and iron united enterprise, the energy consumption is the third place after ironmaking and steel rolling, coke is used in the blast furnace, on the one hand, the coke is used as a fuel and an iron oxide reducing agent for providing heat required by smelting, and the effect is partially replaced by coal injection, the coke has more important functions of serving as a framework for supporting a material column with the height of tens of meters after the ore is softened and melted, and simultaneously serving as a gas passage, the proportion of the coking coal in the raw coal is small, the reserve is limited, the crisis feeling is brought to the development of a long process depending on the coking coal, the traditional long process is developed to the peak, but the characteristics of blast furnace iron making determine that the traditional long process has large scale, high investment, long production period, high energy consumption per ton of steel and serious environmental pollution.

The direct reduction-electric furnace process can also obtain molten steel from iron ore without coke, but most direct reduced iron is produced by a shaft furnace, still needs an iron ore powder agglomeration process, needs abundant natural gas resources, has low production efficiency by a coal-based rotary kiln method, is difficult to enlarge the scale due to a thinner material layer in a rotary hearth furnace method, is difficult to compete with the traditional long process, and has the steel yield share of only 5 percent in the world, so China is few.

The smelting reduction-converter flow changes the dependence degree of the traditional long flow on coke, for example, the COREX smelting reduction iron-making-converter flow only needs a small amount of coke, and in principle, the method only divides the function of a blast furnace into two parts, and the defects are obvious after the gas indirect reduction and the melting separation: the oxygen consumption is large (500m3/t), the investment is 10-20% higher than that of the traditional long-flow process, the development speed is slow, and the melting reduction-converter process is only a revolution of the former process of the traditional long-flow iron.

There are also some patents which propose new steelmaking equipment such as direct steelmaking or one-step steelmaking, the patent of CN 87101210A uses carbon as a reducing agent and fuel at the same time on a converter, a large amount of CO generated is only used for preheating, and the physical heat is recovered, which is uneconomical and theoretically departs from the ironmaking principle and cannot be realized, the mentioned direct steelmaking by using a medium frequency furnace or an electric arc furnace also does not use a large amount of CO generated, the power consumption is very large and cannot be used for production, the patent CN 1116240A and the patent CN 87101210A, the authors are the same person, the technical principle is basically consistent, and the contents are slightly added and refined.

The technology for obtaining sponge iron disclosed in patent CN 1087951A is theoretically equivalent to a coal-based shaft furnace process, and the iron-making industry recognizes that the process is immature and the production cost is high. One fatal shortcoming of this patent is that when the high temperature reducing gas enters the upper chamber through the air hole at the bottom of the sponge iron chute and goes upward to preheat and reduce the ore, the chute air hole is easy to be blocked, and if the side blowing reducing gas is changed, the realization is easy. Nor does this patent mention that the iron ore must be agglomerated. Fine ore is not reducible by a shaft furnace. The raw material used in patent CN1348013A is pellet ore, the technical principle of obtaining sponge iron is also equivalent to that of a coal-based shaft furnace process, and the method is not feasible economically compared with the traditional flow.

The patent CN 1223301A uses a complex mechanism of a tunnel kiln, a pushing rod and a turnplate to produce the sponge iron, the reaction mechanism of the patent CN 1223301A is similar to that of a coal-based rotary kiln process, the reaction mechanism of the patent CN1818082A is also similar to that of the coal-based rotary kiln process, and the production efficiency cannot be high.

Patent CN 1850997 a proposes to use an induction furnace to make steel directly, in which iron ore powder, coal and flux are added to obtain molten iron, then oxygen is blown into the molten iron and flux is added to obtain molten steel.

Patent CN 1851000 a proposes direct steelmaking using a converter from a mixed mass of iron ore fines and anthracite fines by simultaneously blowing oxygen from the top and bottom of the mixed mass. The bottom blowing oxygen only continuously oxidizes the reduced Fe, and the essence of the reaction is that the coal is continuously oxidized. The right method is to use coal for reduction in the slag zone, blow a small amount of primary oxygen in the slag zone to increase the heat of reaction, realize the reduction of iron mineral by coal by controlling the oxygen blowing amount, blow oxygen for secondary combustion in the gas phase zone, the heat of secondary combustion is provided for the reduction reaction in the slag zone to absorb heat, but never blow oxygen iron oxide liquid at the bottom. Therefore, the method proposed in this patent is high in coal consumption, and the productivity is not necessarily high, and it is difficult to realize mass production.

The ironmaking process proposed in patent CN 1073212 a is in principle consistent with the cyclone furnace type smelting reduction process developed by hopgland steel company, uk steel company and eval company, italy, in the netherlands in 1988. Only intermediate tests were carried out with the cyclone furnace type smelting reduction, and no progress has been made so far.

SUMMERY OF THE UTILITY MODEL

In order to overcome the above-mentioned defect of prior art, the embodiment of the utility model provides a zero carbon discharges steelmaking equipment has thoroughly solved the pollution problem through hydrogen reduction iron ore steelmaking, has not only avoided environmental pollution, has also avoided the pollution to steel itself, suitable production ultrapure steel. The utility model discloses an electric power derives from non-grid-connected wind-powered electricity generation, makes hydrogen with non-grid-connected wind-powered electricity generation, and electricity generation and hydrogen manufacturing process do not all have carbon to discharge and produce, and wind-powered electricity generation also can be used to the electric arc furnace steelmaking, the utility model discloses can obtain zero carbon and discharge the result of steelmaking, this equipment is zero carbon and discharges green steelmaking equipment to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a zero-carbon-emission steelmaking device comprises a mineral powder grinding device, a fine ore lifting device, a multi-stage cyclone preheater, a pre-reduction circulating fluidized bed, a final reduction circulating fluidized bed, an electric arc furnace, a wind driven generator, a water electrolysis hydrogen production device, a first gas heat exchanger, a gas supercharging device, a second gas heat exchanger, a third gas heat exchanger, a gas purification device, a fourth gas heat exchanger and a gas dehydration device;

the mineral powder outflow end of the mineral powder grinding equipment is connected with the mineral powder inflow end of the mineral powder lifting equipment, the mineral powder outflow end of the mineral powder lifting equipment is connected with the mineral powder inflow end of the multi-stage cyclone preheater, the mineral powder outflow end of the multi-stage cyclone preheater is connected with the mineral powder inflow end of the pre-reduction circulating fluidized bed, the mineral powder outflow end of the pre-reduction circulating fluidized bed is connected with the mineral powder inflow end of the final reduction circulating fluidized bed, and the mineral powder outflow end of the final reduction circulating fluidized bed is connected with the mineral powder inflow end of the;

the gas outflow end of the water electrolysis hydrogen production equipment is connected with the gas inflow end of a first gas heat exchanger, the gas outflow end of the first gas heat exchanger is connected with the gas inflow end of gas supercharging equipment, the gas outflow end of the gas supercharging equipment is connected with the gas inflow end of a final reduction circulating fluidized bed, the gas outflow end of the multi-stage cyclone preheater is connected with the gas inflow end of gas purification equipment, the gas outflow end of the gas purification equipment is connected with the gas inflow end of a fourth gas heat exchanger, and the gas outflow end of the fourth gas heat exchanger is connected with the gas inflow end of gas dehydration equipment.

In a preferred embodiment, the gas outflow end of the final-reduction circulating fluidized bed is connected with the gas inflow end of the second gas heat exchanger.

In a preferred embodiment, the gas outflow end of the second gas heat exchanger is connected to the gas inflow end of the pre-reduction circulating fluidized bed.

In a preferred embodiment, the gas outflow end of the pre-reduction circulating fluidized bed is connected with the gas inflow end of the third gas heat exchanger.

In a preferred embodiment, the gas outflow end of the third gas heat exchanger is connected to the gas inflow end of the multi-stage cyclone preheater.

In a preferred embodiment, the wind driven generator and the water electrolysis hydrogen production equipment are connected through a conducting wire.

The utility model discloses a technological effect and advantage:

1. the traditional iron-making-steel-making process basically reduces iron ore by using carbon monoxide or carbon to obtain carburized molten iron, then decarbonizes in the steel-making process, and deoxidizes, desulfurizes and degass to remove impurities in the refining process, and compared with the traditional process, the hydrogen atom radius of the hydrogen reduced iron ore powder is small, and the reduction reaction speed is high; the reduction product is water, is easy to separate and treat, realizes clean production, avoids the pollution of carbon to molten iron in the reduction process due to hydrogen reduction, solves the problem of molten steel pollution caused by repeated oxidation reduction reaction in the traditional process, reduces repeated heating, reduces the energy consumption of a system, has less carburization of the generated molten steel, and does not need decarburization when obtaining a finished product of molten steel; the hydrogen does not contain sulfur, and the desulfurization is not needed when the finished product molten steel is obtained; because the carbon activity of the iron liquid is low and the activity of dissolved oxygen is high, Si in the gangue can not be reduced into the molten steel, and Si removal is not needed when finished molten steel is obtained, so that the molten steel can be obtained from iron ore or iron-containing oxide in one step, intermediate products such as the molten iron or direct reduced iron are not needed, the pollution problem is thoroughly solved by reducing iron ore with hydrogen for steel making, the environmental pollution is avoided, the pollution to steel is also avoided, and the steel is suitable for producing ultra-pure steel;

2. the utility model discloses an electric power derives from non-grid-connected wind-powered electricity generation, makes hydrogen with non-grid-connected wind-powered electricity generation, and electricity generation and hydrogen manufacturing process do not all have carbon to discharge and produce, and wind-powered electricity generation also can be used to electric arc furnace steelmaking, consequently compares with current steelmaking flow, and current blast furnace converter steelmaking technology carbon discharges 2.5 tons, and current electric stove steelmaking technology carbon discharges 0.5 tons, and the utility model discloses can obtain zero carbon and discharge the result of steelmaking, consequently this process equipment is zero release green environmental protection process equipment, the utility model discloses steelmaking equipment and capital construction investment are saved in a large number, and conservative calculation can save equipment and capital construction investment more than 50%; the commodity circulation obtains fully simplifying, and at traditional steel plant, the commodity circulation of each process link is very busy, and the iron content commodity circulation is through the intensification cooling of several times, loses a large amount of physics heat, and new zero carbon discharges steelmaking process equipment only a stove, and is very compact, and the commodity circulation is simple orderly, has avoided the temperature loss of molten iron in the transportation moreover, easily realizes the directness and the automatic control of production, is new generation intelligence steel plant, adopts the utility model discloses afterwards, the face and the features of steel plant take place great change.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

The reference signs are: 1 ore grinding powder equipment, 2 ore powder lifting equipment, 3 multi-stage cyclone preheaters, 4 pre-reduction circulating fluidized beds, 5 final reduction circulating fluidized beds, 6 electric arc furnaces, 7 wind driven generators, 8 water electrolysis hydrogen production equipment, 9 first gas heat exchangers, 10 gas supercharging equipment, 11 second gas heat exchangers, 12 third gas heat exchangers, 13 gas purification equipment, 14 fourth gas heat exchangers and 15 gas water removal equipment.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The zero-carbon-emission steelmaking equipment shown in the attached figure 1 comprises a ground ore powder device 1, a ground ore lifting device 2, a multi-stage cyclone preheater 3, a pre-reduction circulating fluidized bed 4, a final reduction circulating fluidized bed 5, an electric arc furnace 6, a wind driven generator 7, a water electrolysis hydrogen production device 8, a first gas heat exchanger 9, a gas supercharging device 10, a second gas heat exchanger 11, a third gas heat exchanger 12, a gas purification device 13, a fourth gas heat exchanger 14 and a gas dehydration device 15;

the mineral powder outflow end of the mineral powder grinding equipment 1 is connected with the mineral powder inflow end of a mineral powder lifting equipment 2, the mineral powder outflow end of the mineral powder lifting equipment 2 is connected with the mineral powder inflow end of a multi-stage cyclone preheater 3, the mineral powder outflow end of the multi-stage cyclone preheater 3 is connected with the mineral powder inflow end of a pre-reduction circulating fluidized bed 4, the mineral powder outflow end of the pre-reduction circulating fluidized bed 4 is connected with the mineral powder inflow end of a final reduction circulating fluidized bed 5, and the mineral powder outflow end of the final reduction circulating fluidized bed 5 is connected with the mineral powder inflow end of an;

the gas outflow end of the water electrolysis hydrogen production device 8 is connected with the gas inflow end of a first gas heat exchanger 9, the gas outflow end of the first gas heat exchanger 9 is connected with the gas inflow end of a gas supercharging device 10, the gas outflow end of the gas supercharging device 10 is connected with the gas inflow end of a final reduction circulating fluidized bed 5, the gas outflow end of the multi-stage cyclone preheater 3 is connected with the gas inflow end of a gas purification device 13, the gas outflow end of the gas purification device 13 is connected with the gas inflow end of a fourth gas heat exchanger 14, and the gas outflow end of the fourth gas heat exchanger 14 is connected with the gas inflow end of a gas dehydration device 15;

the gas outflow end of the final reduction circulating fluidized bed 5 is connected with the gas inflow end of a second gas heat exchanger 11;

the gas outflow end of the second gas heat exchanger 11 is connected with the gas inflow end of the pre-reduction circulating fluidized bed 4;

the gas outflow end of the pre-reduction circulating fluidized bed 4 is connected with the gas inflow end of a third gas heat exchanger 12;

the gas outflow end of the third gas heat exchanger 12 is connected with the gas inflow end of the multi-stage cyclone preheater 3;

the wind driven generator 7 and the water electrolysis hydrogen production equipment 8 are connected through a conducting wire.

Example 1

Mixing iron ore concentrate powder, limestone and dolomite according to the slag components of the materials in the smelting process, determining the mixture ratio according to the material balance, using a ball mill to finely grind the materials to obtain micro powder with the slag alkalinity of 1-1.5, Al2O 35-15%, MgO 5-10% and FeO below 10%, preheating the micro powder to 300-400 ℃ in a multistage cyclone preheater 3, then carrying out pre-reduction in a pre-reduction circulating fluidized bed 4 to obtain the micro powder with the pre-reduction rate of 15-20%, then carrying out final reduction in a final reduction circulating fluidized bed 5 with the final reduction rate of 93-95%, spraying the final reduction iron ore concentrate powder discharged from an outlet of the final reduction circulating fluidized bed 5 into a slag iron bath in an electric arc furnace 6 through a water-cooling spray gun by using N2 as a carrier gas, forming a slag iron bath in the electric arc furnace 6 in advance, wherein the thickness of the slag layer is about 10-30 mm, the thickness of the molten iron bath is about 30-2000 mm, the mixture of the iron concentrate powder and the flux is quickly dissolved into slag (less than one minute), the waste gas in the electric arc furnace 6 is firstly cooled to recover physical heat for power generation and then used for preheating the iron ore micro powder, the electric arc furnace 6 is provided with a slag outlet and a steel outlet, the produced molten steel and slag directly flow out respectively, the obtained crude molten steel has the components of C0.1-0.3%, Si and Mn less than 0.05%, and S, P less than 0.04%, and the qualified molten steel can be obtained through the subsequent external refining and deoxidation alloying procedures.

Example 2

Mixing iron ore concentrate powder, limestone and dolomite according to the slag components of the materials in the smelting process, determining the mixture ratio according to the material balance, using a ball mill to finely grind the materials to obtain micro powder with the granularity of less than 50 mu m, wherein the alkalinity of the slag is 1.5-2, Al2O 38-18%, MgO 5-10% and FeO below 8%, preheating the micro powder to 350-450 ℃ in a multistage cyclone preheater 3, then carrying out pre-reduction in a pre-reduction circulating fluidized bed 4 to obtain the micro powder with the pre-reduction rate of 20-25%, then carrying out final reduction in a final reduction circulating fluidized bed 5, wherein the final reduction rate is 94-96%, the final reduction iron ore concentrate powder discharged from an outlet of the final reduction circulating fluidized bed 5 is sprayed into a slag iron bath in an electric arc furnace 6 through a water-cooling spray gun by using N2 as a carrier gas, a slag iron bath is formed in the electric arc furnace 6 in advance, and the thickness of a slag layer is about 15-35 mm, the thickness of the molten iron bath is about 30-2000 mm, the mixture of the iron concentrate powder and the flux is quickly dissolved into slag (less than one minute), the waste gas in the electric arc furnace 6 is firstly cooled to recover physical heat for power generation and then used for preheating the iron ore micro powder, the electric arc furnace 6 is provided with a slag outlet and a steel outlet, the produced molten steel and slag directly flow out respectively, the obtained crude molten steel has the components of C0.3-0.6%, Si and Mn less than 0.05%, and S, P less than 0.04%, and the qualified molten steel can be obtained through the subsequent external refining and deoxidation alloying procedures.

Example 3

Mixing iron ore concentrate powder, limestone and dolomite according to the slag components of the materials in the smelting process, determining the mixture ratio according to the material balance, generally taking slag with the alkalinity of 2-2.5, Al2O 310-20%, MgO 5-10% and FeO below 5%, finely grinding by using a ball mill to obtain micro powder with the particle size of less than 45 mu m, preheating the micro powder to 400-500 ℃ in a multistage cyclone preheater 3, then carrying out pre-reduction in a pre-reduction circulating fluidized bed 4 to obtain the micro powder with the pre-reduction rate of 25-30%, then carrying out final reduction in a final reduction circulating fluidized bed 5 with the final reduction rate of 95-97%, spraying the final reduction iron ore concentrate powder discharged from an outlet of the final reduction circulating fluidized bed 5 into a slag iron bath in an electric arc furnace 6 by using an N2 as a carrier gas through a water-cooling spray gun, forming a slag iron bath in the electric arc furnace 6 in advance, wherein the slag layer has the thickness of about 20-40 mm, the thickness of the molten iron bath is about 30-2000 mm, the mixture of the iron concentrate powder and the flux is quickly dissolved into slag (less than one minute), the waste gas in the electric arc furnace 6 is firstly cooled to recover physical heat for power generation and then used for preheating the iron ore micro powder, the electric arc furnace 6 is provided with a slag outlet and a steel outlet, the produced molten steel and slag directly flow out respectively, the obtained crude molten steel has the components of C0.6-1.0%, Si and Mn less than 0.05%, and S, P less than 0.04%, and the qualified molten steel can be obtained through the subsequent external refining and deoxidation alloying procedures.

The utility model discloses the theory of operation:

referring to the attached figure 1 of the specification, the wind power generator 7 generates electricity to obtain electricity, the electricity is used for driving the water electrolysis hydrogen production equipment 8 to electrolyze water to produce hydrogen and oxygen, hydrogen is used as a reducing agent for directly reducing iron ore powder by the pre-reduction circulating fluidized bed 4 and the final reduction circulating fluidized bed 5, meanwhile, in order to obtain heat of the hydrogen-reduced iron ore powder, a part of hydrogen and oxygen are combusted in the pre-reduction circulating fluidized bed 4 and the final reduction circulating fluidized bed 5, and high-metallization ratio reduced iron powder obtained after the powder ore is directly reduced by the pre-reduction circulating fluidized bed 4 and the final reduction circulating fluidized bed 5 is blown into the electric arc furnace 6, so that high-quality pure steel can.

The points to be finally explained are: first, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may be a mechanical connection or an electrical connection, or a communication between two elements, and may be a direct connection, and "upper," "lower," "left," and "right" are only used to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed;

secondly, the method comprises the following steps: in the drawings of the disclosed embodiments of the present invention, only the structures related to the disclosed embodiments are referred to, and other structures can refer to the common design, and under the condition of no conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

and finally: the above description is only for the preferred embodiment of the present invention and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A zero-carbon-emission steelmaking device is characterized in that: the system comprises ore grinding powder equipment (1), ore powder lifting equipment (2), a multi-stage cyclone preheater (3), a pre-reduction circulating fluidized bed (4), a final reduction circulating fluidized bed (5), an electric arc furnace (6), a wind driven generator (7), water electrolysis hydrogen production equipment (8), a first gas heat exchanger (9), gas supercharging equipment (10), a second gas heat exchanger (11), a third gas heat exchanger (12), gas purification equipment (13), a fourth gas heat exchanger (14) and gas dehydration equipment (15);

the mineral powder outflow end of the mineral powder grinding equipment (1) is connected with the mineral powder inflow end of the mineral powder lifting equipment (2), the mineral powder outflow end of the mineral powder lifting equipment (2) is connected with the mineral powder inflow end of the multi-stage cyclone preheater (3), the mineral powder outflow end of the multi-stage cyclone preheater (3) is connected with the mineral powder inflow end of the pre-reduction circulating fluidized bed (4), the mineral powder outflow end of the pre-reduction circulating fluidized bed (4) is connected with the mineral powder inflow end of the final reduction circulating fluidized bed (5), and the mineral powder outflow end of the final reduction circulating fluidized bed (5) is connected with the mineral powder inflow end of the electric arc furnace (6);

the gas outflow end of the water electrolysis hydrogen production equipment (8) is connected with the gas inflow end of a first gas heat exchanger (9), the gas outflow end of the first gas heat exchanger (9) is connected with the gas inflow end of a gas supercharging device (10), the gas outflow end of the gas supercharging device (10) is connected with the gas inflow end of a final reduction circulating fluidized bed (5), the gas outflow end of the multistage cyclone preheater (3) is connected with the gas inflow end of a gas purification device (13), the gas outflow end of the gas purification device (13) is connected with the gas inflow end of a fourth gas heat exchanger (14), and the gas outflow end of the fourth gas heat exchanger (14) is connected with the gas inflow end of a gas dehydration device (15).

2. The zero-carbon-emission steelmaking apparatus as claimed in claim 1, wherein: and the gas outflow end of the final reduction circulating fluidized bed (5) is connected with the gas inflow end of the second gas heat exchanger (11).

3. The zero-carbon-emission steelmaking apparatus as claimed in claim 1, wherein: and the gas outflow end of the second gas heat exchanger (11) is connected with the gas inflow end of the pre-reduction circulating fluidized bed (4).

4. The zero-carbon-emission steelmaking apparatus as claimed in claim 1, wherein: the gas outflow end of the pre-reduction circulating fluidized bed (4) is connected with the gas inflow end of the third gas heat exchanger (12).

5. The zero-carbon-emission steelmaking apparatus as claimed in claim 1, wherein: and the gas outflow end of the third gas heat exchanger (12) is connected with the gas inflow end of the multi-stage cyclone preheater (3).

6. The zero-carbon-emission steelmaking apparatus as claimed in claim 1, wherein: the wind driven generator (7) is connected with the water electrolysis hydrogen production equipment (8) through a conducting wire.