CN209890659U - Steel-making molten steel slag reduction ironmaking equipment - Google Patents
Steel-making molten steel slag reduction ironmaking equipment Download PDFInfo
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- CN209890659U CN209890659U CN201920682635.2U CN201920682635U CN209890659U CN 209890659 U CN209890659 U CN 209890659U CN 201920682635 U CN201920682635 U CN 201920682635U CN 209890659 U CN209890659 U CN 209890659U
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Abstract
The utility model discloses a steelmaking melting slag reduction ironmaking equipment, this equipment do not need the external heat source, utilize steelmaking melting slag sensible heat to add reducing agent melting reduction ironmaking to utilize reduced iron byproduct CO combustion heat compensation reduced iron heat absorption, in order to maintain the reduction reaction and continuously go on. The structure specifically includes heat preservation sediment cover, and heat preservation sediment cover central authorities are equipped with conveying pipeline C, and its both sides are equipped with heat-resisting pipe A and heat-resisting pipe B, and the symmetry is equipped with switching-over valve and heat accumulator on the heat preservation sediment cover, and switching-over valve I and heat accumulator I are located heat preservation sediment cover left side promptly, and switching-over valve II and heat accumulator II are located heat preservation sediment cover right side. The valve rods of the two reversing valves are alternately arranged up and down to form a loop in which the air blower sends air from one side, the induced draft fan pumps smoke from the other side, and then the high-temperature smoke is transferred to the heat accumulator by continuous alternate reversing under the program control of a computer, the heat accumulator transfers heat to air, and most heat energy released by coal gas combustion is left in the molten steel slag reduced iron system.
Description
Technical Field
The utility model belongs to a non-blast furnace ironmaking field, in particular to a steelmaking and smelting steel slag reduction ironmaking device which belongs to the smelting reduction ironmaking field.
Background
1. The converter steelmaking oxidizing slag accounts for about 8 ~ 12% of the steel yield, the electric arc furnace steelmaking oxidizing slag accounts for about 5% of the steel yield, the steel yield in China is about 8 hundred million tons per year, the steel yield all over the world is about 16 hundred million tons per year, and the steelmaking byproduct oxidizing slag is more than 6000 million tons per year in China and more than 1 hundred million tons per year all over the world.
The tapping temperature of the first slag of the oxidizing slag in the converter steelmaking is about 1600 ℃, the tapping temperature of the oxidizing slag in the electric arc furnace is about 1500 ℃, and all the tapped oxidizing steel slag is molten.
At present, the molten steel slag is treated by water cooling in the methods of slag splashing, slag stewing pit, slag stewing pot and rotary drum, etc. basically in China and all over the world, and the slag is swelled and cracked into fragments by using the principles of water quenching and volume expansion of calcium oxide (calcium hydroxide) in water and slag, so that the separation of slag and steel (slag with about 2% of slag amount) is realized, and then the slag and steel are recovered by magnetic separation and returned to steel making.
18 ~ 21 percent of Fe2O3 contained in the oxidized slag of the converter, 24 ~ 26 percent of Fe2O3 contained in the oxidized slag of the electric furnace, 22 percent of the average, more than 1320 million tons of molten Fe2O3 which becomes solid waste every year in China, more than 924 million tons of reducible iron, more than 2200 million tons of molten Fe2O3 which becomes solid waste every year in the whole world, more than 1540 million tons of reducible iron, calculated according to the current market quotation of scrap steel, more than 231 ~ 385 hundred million yuan/year per year and more than 200 ~ 340 million yuan/year annual profit.
2. At present, in blast furnace iron making all over the world, coke is still used as a main reducing agent, when the coke is crushed and processed into lump coke suitable for entering a blast furnace, a large amount of coke powder (small particles) is produced as a byproduct, the coke powder which belongs to a high-quality reducing agent is sold at 1/3 coke price in a coking plant, and a steel mill is basically used for burning fuel of a sinter.
Disclosure of Invention
The utility model aims to provide a simple, efficient and safe smelting steel slag reduction iron-making equipment, which utilizes coke powder (or smokeless coal particles and the like) as a reducing agent to reduce Fe in smelting-state oxidized steel slag2O3The method for producing high-quality scrap steel (without impurities) or steelmaking pig iron (with [ C ] > 3.5%) by utilizing sensible heat of steelmaking molten slag and a reducing agent to melt, reduce and iron without an external heat source and compensating the reduced iron for heat absorption by utilizing CO combustion heat of a reduced iron byproduct to maintain the continuous reduction reaction is used for steelmaking of a converter and an electric arc furnace.
The utility model discloses an adopt following technical scheme to realize:
the utility model provides a steelmaking melting slag reduction ironmaking equipment, includes heat preservation sediment cover, heat preservation sediment cover central authorities are equipped with conveying pipeline C, its both sides are equipped with heat-resistant pipe A and heat-resistant pipe B, the symmetry is equipped with switching-over valve and heat accumulator on the heat preservation sediment cover, and switching-over valve I and heat accumulator I are located heat preservation sediment cover left side promptly, and switching-over valve II and heat accumulator II are located heat preservation sediment cover right side.
The reversing valve comprises an air valve cavity and a smoke valve cavity, and the air valve cavity is positioned above the smoke valve cavity; the side part of the air valve is provided with an air inlet, the lower part of the smoke valve cavity is provided with a smoke outlet, the upper part of the smoke valve cavity is provided with an air/smoke alternate inlet and outlet, the upper part of the smoke valve cavity is internally provided with a valve plate, the valve plate is connected with a valve rod, and the valve rod penetrates through the air valve cavity in a sealing manner; when the valve plate is positioned at the end point of the lower stroke, the smoke outlet is closed, and the air inlet is communicated with the air/smoke alternative inlet and outlet; when the valve plate is positioned at the end of the upper stroke, the air inlet is closed, and the smoke outlet is communicated with the air/smoke alternative inlet and outlet.
The heat-resistant pipe A is connected with an inlet and an outlet at one side of a heat accumulator I, and an inlet and an outlet at the other side of the heat accumulator I are connected with an air/flue gas alternative inlet and an outlet of a reversing valve I; and the heat-resistant pipe B is connected with an inlet and an outlet on one side of the heat accumulator II, and an inlet and an outlet on the other side of the heat accumulator II are connected with an air/flue gas alternative inlet and an outlet of the reversing valve II.
The air inlets of the reversing valve I and the reversing valve II are communicated with the blower through a three-way pipe E; and the flue gas outlets of the reversing valve I and the reversing valve II are communicated with an induced draft fan through a three-way pipe D.
The conveying pipe C is connected with a reducing agent conveying pipe and a compressed air source in parallel.
When the slag tank car works, the slag tank car carries the slag tank which is just connected with the discharged slag to move to the position below the slag tank cover to stop automatically, and the slag tank cover and the covering device together descend automatically to cover the slag tank opening. And automatically starting an induced draft fan and an air blower, spraying the compressed air carrying reducing agents (coke small particles and the like) to the molten slag liquid through a water cooling pipe C, splashing part of the molten slag to separate from the liquid surface of the molten slag, mixing the reducing agents with the molten slag liquid, rapidly carrying out reduced iron reaction, gradually settling the reduced product Fe with specific gravity larger than that of the molten slag liquid to the bottom of the slag tank, and naturally converging the reduced product Fe into iron liquid drops. The by-product CO is gathered into CO bubbles, and the CO bubbles float upwards to break the surface of the molten slag to form a boiling state. CO bubbles break through the surface of the molten slag to enter an upper space in the slag pot, compressed air naturally separated from solid gas and O2 gas in air alternately fed through the heat-resistant pipe A or B generate gas combustion in the upper space of the slag pot, and the surface of the boiling molten slag in the middle and lower parts of the slag pot, especially the splashed molten slag which is splashed off the surface of the molten slag, absorbs heat released by the gas combustion, so that the temperature of the molten slag is raised, the fluidity of the molten slag is maintained, diffusion mass transfer is facilitated, and the continuous reduction reaction is facilitated. The overflow of CO bubbles plays a beneficial role in stirring the molten slag, so that the reducing agent particles flushed into the molten slag are uniformly distributed, and the interface of the reduction reaction is large and high in speed. In the reduction reaction process, the valve rods of the left and right reversing valves I and the reversing valve II are respectively driven by the cylinder to alternately switch in place from top to bottom within dozens of seconds. For example, as shown in fig. 1, a valve rod of a reversing valve I is in place, an air channel is closed, and a smoke channel is opened. Meanwhile, the valve rod of the reversing valve II is in place, the air channel is opened, and the smoke channel is closed. At the moment, high-temperature flue gas generated after coal gas is combusted in the slag tank enters a heat accumulator I through a heat-resistant pipe A, most of carried sensible heat is exchanged to the heat accumulator I, then the flue gas enters an induced draft fan through a flue gas outlet of a reversing valve I and a three-way pipe D and is discharged after reaching the standard, most of air required by the coal gas combusted in the slag tank is blown out by an air blower and passes through an air inlet of a reversing valve II and an air and flue gas alternate inlet and outlet, the air enters a heat accumulator II, the heat energy left by the high-temperature flue gas in the previous cycle is transferred to the air by the heat accumulator II, and the air enters the upper space in the slag tank through a heat-resistant pipe B after being heated. And after the valve rods of the next reversing valves I and II automatically switch valve positions, the heat is transferred to air, and the heat energy is carried back to the reduction reaction system. The valve rods of the two reversing valves are alternately arranged up and down to form a loop in which the air blower sends air from one side, the induced draft fan pumps smoke from the other side, and then the high-temperature smoke is transferred to the heat accumulator by continuous alternate reversing under the program control of a computer, the heat accumulator transfers heat to air, and most heat energy released by coal gas combustion is left in the molten steel slag reduced iron system.
The utility model relates to a rationally, fine practical application and spreading value have.
Drawings
Fig. 1 shows a schematic structure of the present invention.
Fig. 2 shows a schematic view of the structure of the reversing valve.
Fig. 3 shows a partially enlarged view of fig. 2.
In the figure: 1-slag tank car (original in steel mill), 2-slag tank (original in steel mill), 3-insulating slag tank cover 4-reversing valve, 4.1-valve rod, 4.2- (two-way line sealing) valve plate, 4.3-air valve cavity (with air valve seat on bottom for sealing valve plate), 4.4-flue gas valve cavity (with flue gas valve seat in middle for sealing valve plate), 4.5-air inlet, 4.6-flue gas outlet, 4.7-air/flue gas alternate inlet and outlet, 4.8-spring, 4.9-ball head, 5-induced draft fan, 6-blower, 7-heat accumulator (ceramic small hole), 8-compressed air source, 9-reducing agent delivery pipe, 10-molten steel slag, 11-CO bubble and 12-splashed molten slag.
Detailed Description
The following describes in detail specific embodiments of the present invention with reference to the accompanying drawings.
A steel-making and melting steel slag reduction iron-making device comprises a heat-preservation slag tank cover 3, wherein a conveying pipe C is arranged in the center of the heat-preservation slag tank cover 3, a heat-resistant pipe A and a heat-resistant pipe B are arranged on two sides of the heat-preservation slag tank cover 3, a reversing valve 4 and a heat accumulator 7 are symmetrically arranged on the heat-preservation slag tank cover 3, namely the reversing valve I and the heat accumulator I are located on the left side of the heat-preservation slag tank cover 3, and the reversing valve II and the heat accumulator II are located on the right side of the.
As shown in fig. 2, the reversing valve 4 comprises an air valve cavity 4.3 and a smoke valve cavity 4.4, and the air valve cavity 4.3 is arranged above the smoke valve cavity 4.4; an air inlet 4.5 is arranged at the side part of the air valve cavity 4.3, a smoke outlet 4.6 is arranged at the lower part of the smoke valve cavity 4.4, an air/smoke alternate inlet and outlet 4.7 is arranged at the upper part of the smoke valve cavity 4.4, a valve plate 4.2 is arranged in the upper part of the smoke valve cavity 4.4, and a valve rod 4.1 is connected to the valve plate 4.2, as shown in figure 3, the valve rod 4.1 is connected with the valve plate 4.3 through a spring 4.8 and a ball head 4.9, and the valve rod 4.1 drives the valve plate 4.3 to perform a certain buffer sealing effect in the process of up. The valve rod 4.1 penetrates through the air valve cavity 4.3 in a sealing way; when the valve plate 4.2 is positioned at the end point of the lower stroke, the valve plate 4.2 is contacted with the smoke valve seat in the middle of the smoke valve cavity 4.4, the smoke outlet 4.6 is closed (namely the upper part and the lower part of the smoke valve cavity 4.4 are separated), and the air inlet 4.5 is communicated with the air/smoke alternating inlet and outlet 4.7; when the valve plate 4.2 is positioned at the end of the upper stroke, the valve plate 4.2 is contacted with the air valve seat at the bottom surface of the air valve cavity 4.3, the air inlet 4.5 is closed (namely the air valve cavity 4.3 is separated from the upper part of the smoke valve cavity 4.4), and the smoke outlet 4.6 is communicated with the air/smoke alternate inlet and outlet 4.7.
The working principle of the reversing valve 4 is as follows: a valve rod 4.1 of the reversing valve I is located at an upper position, a bidirectional linear sealing valve plate 4.2 is tightly connected with an air valve seat of an air valve cavity 4.3 in a linear sealing mode, and air cannot enter the valve. At the moment, the flue gas can enter the flue gas valve cavity through an air and flue gas alternative inlet and outlet 4.7, passes through a flue gas valve seat positioned in the middle of the flue gas valve cavity 4.4, and then enters the induced draft fan through a flue gas outlet 4.6 and a three-way pipe D; on the contrary, the valve rod 4.1 of the reversing valve II is in place, the two-way linear sealing valve plate 4.2 is in tight connection and linear sealing with the smoke valve seat in the middle of the smoke valve cavity 4.4, the smoke channel is cut off, air enters the air valve cavity 4.3 through the three-way pipe E and the air inlet 4.5, passes through the air valve seat at the bottom of the air valve cavity 4.3, enters the heat accumulator II through the upper part of the smoke valve cavity 4.4 and the air/smoke alternate inlet and outlet 4.7, absorbs heat and heats, and then passes through the heat-resistant pipe B to enter the combustion system.
As shown in figure 1, a heat-resistant pipe A is connected with an inlet and an outlet at one side of a heat accumulator I, and an inlet and an outlet at the other side of the heat accumulator I are connected with an air/flue gas alternative inlet and outlet 4.7 of a reversing valve I; and the heat-resistant pipe B is connected with an inlet and an outlet on one side of the heat accumulator II, and an inlet and an outlet on the other side of the heat accumulator II are connected with an air/flue gas alternative inlet and outlet 4.7 of the reversing valve II. Air inlets 4.5 of the reversing valve I and the reversing valve II are communicated with an air blower 6 through a three-way pipe E; and the flue gas outlets 4.6 of the reversing valve I and the reversing valve II are communicated with an induced draft fan 5 through a three-way pipe D. The feed delivery pipe C is connected with a reducing agent feed delivery pipe 9 and a compressed air source 8 in parallel.
In specific implementation, the slag tank truck 1 and the slag tank 2 can utilize original materials (preferably newly made heat-preservation slag tanks) of a steel mill; the slag tank cover 3 is a jacketed member formed by double-layer steel plates, and is made by pouring light heat-insulating aggregate concrete in the middle; a jacketed water-cooling pipe (as a conveying pipe C) is welded in the center of the slag pot cover 3; welding a thicker heat-resistant pipe A and a heat-resistant pipe B at two sides of the water-cooled pipe; the heat-resistant pipe A, B is respectively communicated with the left heat accumulator and the right heat accumulator, and passes through the heat accumulators to be respectively communicated with the air and the smoke alternate inlet and outlet of the left reversing valve and the right reversing valve; after the flue gas outlets of the left reversing valve and the right reversing valve are connected, the flue gas outlets are communicated with a draught fan 5 through a three-way pipe D; after the air inlets of the left reversing valve and the right reversing valve are communicated, the air inlets are communicated with the blower 6 through a three-way pipe E; the water-cooled tube is communicated with a compressed air source 8 (or an air compression station of a steel mill) and is communicated with a reducing agent delivery pipe 9 at a proper position of the water-cooled tube.
A valve rod 4.1 in the reversing valve 4 is connected with an air valve cavity 4.3 through a sliding sealing device; the upper part of the valve rod 4.1 is connected with a piston rod (not shown in the figure) of the pneumatic cylinder, and the lower part of the valve rod is connected with a bidirectional linear sealing valve plate 4.2 through a ball head 4.8 and a spring 4.9; in the reversing valve 4, an air valve cavity 4.3 and a smoke valve cavity 4.4 form a thick and thin valve body; an air inlet 4.5 is arranged on the lateral side of the air valve cavity 4.3; a flue gas outlet 4.6 is arranged at the lower side of the flue gas valve cavity 4.4; the reversing valve body and the bidirectional linear sealing valve plate are both made of heat-resistant cast iron through casting, and the valve rod is made of a steel bar material through processing.
The melting steel slag reduction iron-smelting device is formed by simply reforming and combining the original slag car 1 and the original slag pot 2 of a steel mill. Preferably, the slag ladle is arranged near the slag discharging side of the converter or the electric arc furnace (the heat loss during transportation is reduced), and the newly added 3 slag ladle covers and the devices on the slag ladle covers are arranged above the track of the slag ladle car 1 and can move up and down under the program control of a computer.
The slag tank truck 1 carries a slag tank 2 (molten slag approximately occupies 1/3 ~ 1/2 of the volume of the slag tank) which is just connected with slag, the slag tank moves to the position below a slag tank cover 3 to be automatically stopped, the slag tank cover 3 and a covering device automatically descend together to cover a slag tank opening, an induced draft fan 5 and an air blower 6 are automatically started, compressed air carries a reducing agent (coke granules and the like), the reducing agent is sprayed to molten slag liquid 10 through a water cooling pipe C, part of the molten slag is splashed to be separated from the liquid level of the molten slag, the reducing agent is mixed with the molten slag liquid 10, and the following reduced iron reaction rapidly occurs:
fe2O3 + 3C ═ 2Fe + 3CO (endothermic)
The specific gravity of the reduction product Fe is larger than that of the molten slag liquid, and the reduction product Fe gradually settles to the bottom of the slag tank and naturally converges into iron liquid drops.
The by-product CO is gathered into CO bubbles 11, and the CO bubbles 11 float upwards to break the surface of the molten slag to form a boiling state.
2CO + O2 ═ 2CO2 (exothermic)
The boiling surface of the molten slag 10 in the middle and low part of the slag tank, especially the splashed molten slag 12 which splashes away from the surface of the molten slag, absorbs the heat released by the combustion of the gas, raises the temperature of the molten slag 10 (at least can offset the heat absorption of the reduction reaction, and maintains the slag temperature), keeps the fluidity of the molten slag 10, is beneficial to the diffusion mass transfer and is beneficial to the continuous running of the reduction reaction.
The overflow of the CO bubbles 11 plays a beneficial role in stirring the molten slag 10, so that the reducing agent particles flushed into the molten slag 10 are uniformly distributed, and the interface of the reduction reaction is large and fast.
In the reduction reaction process, the valve rods of the left and right reversing valves are alternately switched in place by the power of the air cylinder within dozens of seconds. For example, as shown in fig. 1, a valve rod 4.1 of the reversing valve I is in place, an air channel is closed, and a smoke channel is opened. Meanwhile, a valve rod 4.1 of the reversing valve II is put in place, the air channel is opened, and the smoke channel is closed. At the moment, high-temperature flue gas generated after coal gas is combusted in the slag pot 2 enters the heat accumulator I through the heat-resistant pipe A, most of carried sensible heat is exchanged to the heat accumulator I, then the flue gas enters the induced draft fan 5 through the flue gas outlet 4.6 of the heat exchange valve I and the three-way pipe D and is discharged after reaching the standard, most of air required by coal gas combusted in the slag pot 2 is blown out through the air inlet 4.5 of the reversing valve II and the air/flue gas alternate inlet and outlet 4.7 by the air blower 6 and enters the heat accumulator II, the heat energy left by the last circulation of high-temperature flue gas is transferred to the air by the heat accumulator II, the air enters the upper space in the slag pot 2 through the heat-resistant pipe B after being heated to be higher than 500 ℃, and. More heat energy is released in the reaction, one part of the heat energy is directly transferred to the molten slag 10, particularly the splashed molten slag 12, so that the heat absorbed by the reduction reaction is compensated, the temperature of the molten slag 10 is raised, the other part of the heat energy is taken away by high-temperature flue gas, most of the heat energy is reserved for the heat accumulator I, and then the heat energy is transferred to air after the valve positions of the valve rods 4.1 of the reversing valve I and the reversing valve IIare automatically switched in the next period, and the heat energy is carried back to the reduction reaction system. The valve rods of the 2 reversing valves are alternately arranged up and down to form a loop in which the air blower sends air from one side, the draught fan pumps smoke from the other side, and then the high-temperature smoke is transferred to the heat accumulator by continuous alternate reversing under the program control of a computer, the heat accumulator transfers heat to air, and most heat energy released by coal gas combustion is left in the molten steel slag reduced iron system.
When the amount of the reducing agent flushed into the molten slag 10 by the compressed air reaches the dosage (smelting high-quality steel scrap) or exceeds 6% (smelting steel-making pig iron), the compressed air is automatically closed, and the reducing agent is not added any more.
After the reduction reaction is finished (the temperature of hot air flow is obviously reduced by measuring by a thermocouple on a heat-resistant pipe A, B, and no gas combustion reaction exists), the slag tank cover 3 and all devices on the upper part thereof, the slag tank car 1, the slag tank 2 and the molten slag 10 (containing reduced iron) are lifted to a molten slag sensible heat recovery system or a current water-cooling slag treatment system of a steel mill, cooling and slag-steel separation are carried out, and high-quality steel scrap or steel-making pig iron is recovered by magnetic separation (the original system of the steel mill).
The utility model has the advantages of as follows:
1. the smelting reduction iron-making is easily realized by utilizing the sensible heat of the steelmaking melting slag and the heat released by the combustion of coal gas which is a byproduct of the reduction reaction without heating up the fuel to melt the iron oxide.
2. The steel-making process does not need to be changed, only a slag tank cover slightly larger than the caliber of the slag tank of the steel mill and a device related to the upper part of the slag tank cover are hung in the half way of the movement of the slag tank car, the modification engineering quantity and the investment are very small, and the economic benefit and the environmental protection benefit (the waste steel slag is reduced by 20%) are extremely high.
3. The coke powder waste reducing agent is used for smelting reduction ironmaking, the coke powder use value (fuel is changed into reducing agent) is improved, the reduction cost is lower, and the economic benefit is higher.
4. The iron oxide (about 22 percent on average) in the waste steel slag is changed into valuable.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and are not limited, and although the detailed description is made with reference to the embodiments of the present invention, those skilled in the art should understand that the technical solutions of the present invention are modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the protection scope of the claims.
Claims (2)
1. A steel-making molten steel slag reduction ironmaking equipment is characterized in that: the heat-preservation slag tank cover comprises a heat-preservation slag tank cover (3), wherein a conveying pipe C is arranged in the center of the heat-preservation slag tank cover (3), a heat-resistant pipe A and a heat-resistant pipe B are arranged on two sides of the heat-preservation slag tank cover, a reversing valve (4) and a heat accumulator (7) are symmetrically arranged on the heat-preservation slag tank cover (3), namely the reversing valve I and the heat accumulator I are positioned on the left side of the heat-preservation slag tank cover (3), and the reversing valve II and the heat accumulator II are positioned on the right side of;
the reversing valve (4) comprises an air valve cavity (4.3) and a smoke valve cavity (4.4), and the air valve cavity (4.3) is positioned above the smoke valve cavity (4.4); an air inlet (4.5) is arranged at the side part of the air valve cavity (4.3), a smoke outlet (4.6) is arranged at the lower part of the smoke valve cavity (4.4), an air/smoke alternate inlet and outlet (4.7) is arranged at the upper part of the smoke valve cavity (4.4), a valve plate (4.2) is arranged in the upper part of the smoke valve cavity (4.4), a valve rod (4.1) is connected to the valve plate (4.2), and the valve rod (4.1) penetrates through the air valve cavity (4.3) in a sealing manner; when the valve plate (4.2) is positioned at the end point of the lower stroke, the smoke outlet (4.6) is closed, and the air inlet (4.5) is communicated with the air/smoke alternative inlet and outlet (4.7); when the valve plate (4.2) is positioned at the end of the upper stroke, the air inlet (4.5) is closed, and the smoke outlet (4.6) is communicated with the air/smoke alternative inlet and outlet (4.7);
the heat-resistant pipe A is connected with an inlet and an outlet at one side of a heat accumulator I, and an inlet and an outlet at the other side of the heat accumulator I are connected with an air/flue gas alternative inlet and outlet (4.7) of a reversing valve I; the heat-resistant pipe B is connected with an inlet and an outlet at one side of a heat accumulator II, and an inlet and an outlet at the other side of the heat accumulator II are connected with an air/flue gas alternative inlet and outlet (4.7) of a reversing valve II;
air inlets (4.5) of the reversing valve I and the reversing valve II are communicated with an air blower (6) through a three-way pipe E; the flue gas outlets (4.6) of the reversing valve I and the reversing valve II are communicated with a draught fan (5) through a three-way pipe D;
the conveying pipe C is connected with a reducing agent conveying pipe (9) and a compressed air source in parallel.
2. The steel-making molten steel slag reduction ironmaking equipment according to claim 1, characterized in that: in the reversing valve, the valve rod (4.1) is connected with the valve plate (4.3) through a spring (4.8) and a ball head (4.9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201920682635.2U CN209890659U (en) | 2019-05-14 | 2019-05-14 | Steel-making molten steel slag reduction ironmaking equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920682635.2U CN209890659U (en) | 2019-05-14 | 2019-05-14 | Steel-making molten steel slag reduction ironmaking equipment |
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| CN209890659U true CN209890659U (en) | 2020-01-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115323094A (en) * | 2022-08-18 | 2022-11-11 | 郭瑛 | Molten steel slag reduction iron-making system and iron-making method |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115323094A (en) * | 2022-08-18 | 2022-11-11 | 郭瑛 | Molten steel slag reduction iron-making system and iron-making method |
| CN115323094B (en) * | 2022-08-18 | 2023-12-22 | 郭瑛 | Molten steel slag reduction iron-making system and iron-making method |
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