Converter CO2 injection efficient slag splashing protection furnace

Abstract

The utility model relates to the technical field of slag splashing protection furnaces, in particular to a CO2 blowing efficient slag splashing protection furnace for a converter, which comprises a support and a slag splashing protection furnace mechanism. Carbon dioxide gas enters from the oxygen inlet and is sprayed out from the gas spraying holes through the oxygen channel, adjusted slag is splashed to the surface of the inner wall of the converter through supersonic speed carbon dioxide jet flow, a high-melting-point MgO-containing slag splashing layer is formed through sintering, and the purpose of prolonging the service life of the converter is achieved. Carbon dioxide is generally regarded as greenhouse gas, the application of carbon dioxide in converter slag splashing is innovative utilization of waste gas resources, reduction of carbon emission is facilitated, the concept of sustainable development and green industry is met, the carbon dioxide trapping cost is relatively low, and the economic benefit is high when carbon dioxide is applied to converter slag splashing protection. The carbon dioxide can also chemically react with components in the slag, and the generated product can change the physical and chemical properties of the slag and increase the viscosity and stability of the slag, so that the effect of protecting the furnace by splashing the slag is better realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to a technology field of slag splashing and furnace protection, concretely is a converter spraying CO2 high -efficient slag splashing and furnace protection. BACKGROUND

[0002] The converter steelmaking field is a key link in the steel production. In this field, advanced converter equipment is constantly innovated. Large-scale converters have higher production efficiency and stronger processing capacity, which can meet the growing demand of the steel market. The lining material of the converter is also continuously improved to improve the service life and stability of the lining, reduce the maintenance frequency and cost.

[0003] In the traditional converter slag splashing and furnace protection process, first, N2 specially prepared needs to be used, and the N2 trapping cost is relatively high, which leads to the decline of economic benefits, and the viscosity and stability of the slag are low, second, the gas after the slag splashing work is not easy to reuse, causing resource waste. UTILITY MODEL CONTENT

[0004] The purpose of the utility model content is to provide a converter spraying CO2 high -efficient slag splashing and furnace protection to solve the problems raised in the above background technology.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: a converter spraying CO2 high -efficient slag splashing and furnace protection, including support and slag splashing and furnace protection mechanism, the right side of support is provided with transmission machine, one side of transmission machine is provided with slag splashing and furnace protection mechanism, the inside of support is provided with furnace body, the inside of furnace body is provided with refractory brick layer, the top of furnace body is provided with exhaust fume hood, the inside of exhaust fume hood is provided with oxygen lance, the left side of oxygen lance is provided with gas pump, the left side of gas pump is provided with back gas pipe, the left side of back gas pipe is provided with gas separation processing tower.

[0006] Preferably, the top of the oxygen lance is provided with an oxygen inlet, the inside of the oxygen lance is provided with an oxygen channel, the oxygen channel is connected with the oxygen inlet by a pipeline, the bottom of the oxygen channel is connected with a gas injection hole by a pipeline, and the gas injection hole is provided with multiple groups.

[0007] Preferably, the left side of the oxygen inlet is provided with a water inlet, the water inlet is fixedly connected with the oxygen lance, the water inlet is connected with one end of a circulation pipe by a pipeline, and the other end of the circulation pipe is connected with a drain.

[0008] Preferably, the gas pump is connected with the exhaust fume hood by bolts, the gas pump is connected with the gas separation processing tower through the back gas pipe, and the top left side of the gas separation processing tower is threadedly connected with a carbon monoxide exhaust pipe.

[0009] Preferably, the top right side of the gas separation treatment tower is threadedly connected with a one-way valve, the upper side of the one-way valve is threadedly connected with a carbon dioxide gas inlet pipe, and the right side of the carbon dioxide gas inlet pipe is plug-connected with a gas feeding pipe, and the gas feeding pipe is connected with the oxygen inlet.

[0010] Compared with the prior art, the utility model has the advantages that:

[0011] The utility model discloses a carbon dioxide is used, and the carbon dioxide enters from the oxygen inlet, is sprayed from the air injection hole through the oxygen channel, and the supersonic carbon dioxide jet flow makes the adjusted slag splash to the inner wall surface of the converter, and the sintering forms the MgO-containing slag splashing layer with high melting point, to improve the service life of the converter, and the carbon dioxide is usually regarded as greenhouse gas, and its use in the converter slag splashing is the innovative use of waste gas resources, which helps to reduce carbon emissions, conforms to the concept of sustainable development and green industry, and the carbon dioxide capture cost is relatively low, and the use in the converter slag splashing protection has higher economic benefits, and the carbon dioxide can also react chemically with the components in the slag, and the generated product can change the physical and chemical properties of the slag, increase the viscosity and stability of the slag, thereby better realizing the effect of slag splashing protection, and prolonging the service life of the converter.

[0012] Through the setting of the air pump, the gas return pipe, the gas separation treatment tower and the carbon monoxide exhaust pipe, the carbon dioxide for slag splashing protection reacts chemically with the carbon at high temperature to generate carbon monoxide, the air pump draws the gas after slag splashing into the gas separation treatment tower through the gas return pipe, the carbon monoxide and the carbon dioxide mixed flue gas is recovered, the carbon monoxide and the carbon dioxide are separated in the gas separation treatment tower, the carbon monoxide is discharged from the carbon monoxide exhaust pipe and used for baking ladles and tundishes in the steel plant, the remaining carbon dioxide after separation is discharged from the one-way valve, the carbon dioxide entering the carbon dioxide gas inlet pipe is supplemented, enters the oxygen inlet through the gas feeding pipe and is used as the gas source for slag splashing protection again, the waste gas can be recycled in the converter steelmaking workshop, the emission of carbon dioxide is effectively reduced, and the pressure on the environment is relieved. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the appearance structure schematic diagram of the utility model.

[0014] Figure 2 It is the appearance structure schematic diagram of the utility model. Figure 1 It is the appearance structure schematic diagram of the utility model.

[0015] Figure 3 It is the furnace body internal structure schematic diagram of the utility model.

[0016] Figure 4 It is the exhaust hood, oxygen lance, oxygen inlet, water inlet, drain and air pump cooperation schematic diagram of the utility model.

[0017] Figure 5 The utility model discloses a Figure 3 B inside amplification structure schematic diagram.

[0018] In the figure: 1, support; 2, transmission machine; 3, splashing slag protection mechanism; 301, furnace body; 302, refractory brick layer; 303, exhaust fume cover; 304, oxygen lance; 305, oxygen inlet; 306, oxygen channel; 307, air injection hole; 308, water inlet; 309, circulating pipe; 310, drain outlet; 311, air pump; 312, air return pipe; 313, gas separation processing tower; 314, carbon monoxide exhaust pipe; 315, check valve; 316, carbon dioxide inlet pipe; 317, air supply pipe. DETAILED DESCRIPTION

[0019] In order to make the technical means, creation features, purposes and effects of the utility model easy to understand, the utility model will be further described below in combination with specific embodiments.

[0020] In the description of the utility model, it needs to be explained that the orientation or position relationship indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like is the orientation or position relationship shown based on the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0021] In the description of the utility model, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "connection" and the like should be understood broadly, for example, "connection" can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0022] The technical schemes in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary skilled persons in the art without creative labor belong to the scope of protection of the utility model.

[0023] Please refer to Figures 1-4The utility model provides a kind of embodiment: a converter injection CO2 high-efficiency splashing slag protection furnace, including support 1 and splashing slag protection furnace mechanism 3, the right side of support 1 is provided with transmission machine 2, one side of transmission machine 2 is provided with splashing slag protection furnace mechanism 3, the inside of support 1 is provided with furnace body 301, the inside of furnace body 301 is provided with refractory brick layer 302, the top of furnace body 301 is provided with exhaust fume hood 303, the inside of exhaust fume hood 303 is provided with oxygen lance 304, the left side of oxygen lance 304 is provided with gas pump 311, the left side of gas pump 311 is provided with back gas pipe 312, the left side of back gas pipe 312 is provided with gas separation processing tower 313.

[0024] Specifically, the top of oxygen lance 304 is provided with oxygen inlet 305, the inside of oxygen lance 304 is provided with oxygen channel 306, oxygen channel 306 is connected with oxygen inlet 305 by pipeline, the bottom of oxygen channel 306 is connected with gas injection hole 307 by pipeline, gas injection hole 307 is provided with multiple groups, carbon dioxide enters from oxygen inlet 305, is sprayed from gas injection hole 307 through oxygen channel 306, supersonic carbon dioxide jet makes adjusted molten slag splash to the inner wall surface of converter, sintering forms high-melting-point MgO-containing splashing slag layer, to improve the purpose of converter campaign, carbon dioxide is usually regarded as greenhouse gas, and its use in converter splashing slag is innovative use of waste gas resources, which helps to reduce carbon emissions, in line with the concept of sustainable development and green industry, and the cost of carbon dioxide capture is relatively low, and the use of carbon dioxide in converter splashing slag protection has high economic benefits, carbon dioxide can also react chemically with the components in the slag, and the generated product can change the physical and chemical properties of the slag, increase the viscosity and stability of the slag, so that the effect of splashing slag protection is better realized, and the service life of the converter is prolonged.

[0025] Specifically, the left side of oxygen inlet 305 is provided with water inlet 308, water inlet 308 is fixedly connected with oxygen lance 304, the lower side of water inlet 308 is connected with one end of circulating pipe 309 by pipeline, the other end of circulating pipe 309 is connected with drain 310, cold water enters circulating pipe 309 from water inlet 308 and is discharged from drain 310 for cooling.

[0026] Specifically, gas pump 311 is connected with exhaust fume hood 303 by bolts, gas pump 311 is connected with gas separation processing tower 313 through back gas pipe 312, the top left side of gas separation processing tower 313 is threadedly connected with carbon monoxide exhaust pipe 314, splashing slag protection carbon dioxide reacts with carbon at high temperature to generate carbon monoxide, gas pump 311 draws the gas after splashing slag into gas separation processing tower 313 through back gas pipe 312, and carbon monoxide and carbon dioxide mixed flue gas is recycled, gas separation processing tower 313 separates carbon monoxide and carbon dioxide, carbon monoxide is discharged from carbon monoxide exhaust pipe 314 and is used for baking ladle and tundish in steel plant.

[0027] Specifically, a one-way valve 315 is threadedly connected to the top right side of the gas separation treatment tower 313, a carbon dioxide inlet pipe 316 is threadedly connected above the one-way valve 315, a gas delivery pipe 317 is inserted into the right side of the carbon dioxide inlet pipe 316, the gas delivery pipe 317 is connected with the oxygen inlet 305, the remaining carbon dioxide after separation is discharged from the one-way valve 315, the carbon dioxide entering the carbon dioxide inlet pipe 316 is supplemented, and enters the oxygen inlet 305 through the gas delivery pipe 317 to serve as a gas source for slag splashing protection technology again, which can realize the recycling of waste gas in the converter steelmaking workshop, effectively reduce the emission of carbon dioxide, and relieve the pressure on the environment.

[0028] Working principle: first, carbon dioxide enters from the oxygen inlet 305, is sprayed from the jet hole 307 through the oxygen channel 306, and the supersonic carbon dioxide jet stream makes the adjusted molten slag splash to the inner wall surface of the converter, sintering to form a high-melting-point MgO-containing slag splashing layer, achieving the purpose of improving the service life of the converter. Carbon dioxide is usually considered a greenhouse gas, and its use in converter slag splashing is an innovative use of waste gas resources, which helps to reduce carbon emissions and is in line with the concept of sustainable development and green industry. Moreover, the cost of carbon dioxide capture is relatively low, and the use of carbon dioxide for converter slag splashing protection has high economic benefits. Carbon dioxide can also chemically react with the components in the slag to generate products that can change the physical and chemical properties of the slag, increasing the viscosity and stability of the slag, thereby better achieving the effect of slag splashing protection and prolonging the service life of the converter. At the same time, cold water enters the circulating pipe 309 from the water inlet 308 and is discharged from the water outlet 310 to cool down. Then, the carbon dioxide for slag splashing protection reacts with the added carbon at high temperature to generate carbon monoxide. The gas pump 311 draws the gas after slag splashing into the gas separation treatment tower 313 through the gas return pipe 312 to recover the carbon monoxide and carbon dioxide mixed flue gas. The gas separation treatment tower 313 separates the carbon monoxide and carbon dioxide, the carbon monoxide is discharged from the carbon monoxide exhaust pipe 314 and used for baking ladles and tundishes in steelmaking plants, and the remaining carbon dioxide after separation is discharged from the one-way valve 315 to supplement the carbon dioxide entering the carbon dioxide inlet pipe 316, which enters the oxygen inlet 305 through the gas delivery pipe 317 to serve as a gas source for slag splashing protection technology again, which can realize the recycling of waste gas in the converter steelmaking workshop, effectively reduce the emission of carbon dioxide, and relieve the pressure on the environment.

[0029] The above only is the embodiment of the present application, and the well-known specific structure and characteristics and other common knowledge are not described in detail herein. For those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or basic characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A high-efficiency slag splashing and protecting furnace by CO2 injection for converter, comprising a support (1) and a slag splashing and protecting furnace mechanism (3), characterized in that: The right side of the support (1) is provided with a transmission machine (2), one side of the transmission machine (2) is provided with a slag splashing furnace protection mechanism (3), the inner side of the support (1) is provided with a furnace body (301), the inner side of the furnace body (301) is provided with a refractory brick layer (302), the upper side of the furnace body (301) is provided with an exhaust smoke hood (303), the inside of the exhaust smoke hood (303) is provided with an oxygen lance (304), the left side of the oxygen lance (304) is provided with an air pump (311), the left side of the air pump (311) is provided with a gas return pipe (312), the left side of the gas return pipe (312) is provided with a gas separation treatment tower (313).

2. The high-efficiency slag splashing and protecting furnace by CO2 injection for converter according to claim 1, characterized in that: The top of the oxygen lance (304) is provided with an oxygen inlet (305), the inside of the oxygen lance (304) is provided with an oxygen channel (306), the oxygen channel (306) is connected with the oxygen inlet (305) in a pipeline mode, the bottom of the oxygen channel (306) is connected with a plurality of groups of air injection holes (307) in a pipeline mode, and each group of air injection holes (307) is directed to each direction of the bottom of the furnace body (301).

3. The high-efficiency slag splashing and protecting for converter blowing CO2 according to claim 2, characterized in that: The left side of the oxygen inlet (305) is provided with a water inlet (308), the water inlet (308) is fixedly connected with the oxygen lance (304), the lower side of the water inlet (308) is connected with one end of a circulating pipe (309) in a pipeline mode, and the other end of the circulating pipe (309) is connected with a drain outlet (310).

4. The high-efficiency slag splashing and protecting for converter blowing CO2 according to claim 1, characterized in that: The air pump (311) is connected with the exhaust smoke hood (303) in a bolt connection mode, the air pump (311) is connected with the gas separation treatment tower (313) through the gas return pipe (312), and the top left side of the gas separation treatment tower (313) is threadedly connected with a carbon monoxide exhaust pipe (314).

5. The high-efficiency slag splashing and protecting for converter blowing CO2 according to claim 1, characterized in that: The top right side of the gas separation treatment tower (313) is threadedly connected with a one-way valve (315), the upper side of the one-way valve (315) is threadedly connected with a carbon dioxide inlet pipe (316), the right side of the carbon dioxide inlet pipe (316) is inserted with a gas supply pipe (317), and the gas supply pipe (317) is connected with the oxygen inlet (305).

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