CN212655812U - Cold-state refining slag recycling system - Google Patents
Cold-state refining slag recycling system Download PDFInfo
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- CN212655812U CN212655812U CN202021326345.3U CN202021326345U CN212655812U CN 212655812 U CN212655812 U CN 212655812U CN 202021326345 U CN202021326345 U CN 202021326345U CN 212655812 U CN212655812 U CN 212655812U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
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Abstract
The utility model provides a resource recycling cold refining slag system, which comprises a converter and a blowing tank, wherein a plurality of spray guns for spraying raw materials into the converter are arranged in the converter; the side wall of the injection tank is connected with a fluidizing gas pipe for fluidizing refining slag, the bottom of the injection tank is connected with an injector, and the injector is connected with a spray gun through a related pipeline. The utility model discloses system and method are applicable to 50 ~ 350 tons of converters, can practice thrift converter slagging material, reduce lime and slagging agent quantity, alleviate the converter smelting process to the erosion of furnace lining refractory material, improve converter slagging speed, are favorable to the converter to smelt the dephosphorization of initial stage, realize the recycle of iron-containing substance in the refining slag, further improve the metal yield, reduce the steelmaking cost.
Description
Technical Field
The utility model belongs to the technical field of metallurgical technology, a resource cyclic utilization cold refining slag system is related to.
Background
The recent steel industry develops to the present stage, and two types of processes are basically formed: the process comprises a blast furnace-converter-refining-continuous casting-hot rolling process taking iron ore and coal as sources, namely a long process, and a furnace-refining-continuous casting-hot rolling process taking scrap steel and electric power as sources, namely a short process.
The steel slag generation links comprise a molten iron desulphurization process, a converter and an electric furnace smelting, so the steel slag in the steel-making process can be divided into molten iron pretreatment desulphurization slag, converter slag, electric furnace slag and refining slag.
According to statistics, 130-180 kg of steel slag is generated every ton of steel produced, wherein 20-50 kg of refining slag has a utilization rate of about 55%, and a large amount of refining slag is still piled every year, so that a large amount of land is occupied, a large amount of waste alkali liquor permeates into soil, the soil is alkalized, and environmental problems such as surface underground water source pollution and the like are more severe, and the refining slag needs to be reprocessed for utilization, so that an environment-friendly steel enterprise is constructed.
The comprehensive utilization of the refining slag comprises the comprehensive utilization of hot refining slag and the comprehensive utilization of cold refining slag.
The comprehensive utilization of the cold refining slag can be used as building materials, valuable metals are recycled, the steel industry is recycled, pollution treatment is carried out, and the like. Cold slag, unlike hot slag, requires cooling, crushing and screening, which increases mechanical costs, but the ability to control slag variables at any time helps ensure proper tapping quality. The composition of cold slag of a steel plant from the chensie and the like is firstly analyzed to meet the refining requirement, slag materials are added for ensuring the tapping quality, and the result shows that the cold slag can replace 3.3 kg/t and about 1.27kg/t of aluminum deoxidizing balls. The Anlon iron and steel company proves that cold slag is adopted as a slagging agent, the cold slag is recycled for 2 times, the desulfurization efficiency is good, the sulfur exceeding phenomenon does not exist, the lime consumption is reduced by 25 kg/t, the alumina consumption is reduced by 2 kg/t, and the service life of a ladle is prolonged from the original 79 heats to 84 heats. Cavallotti PL, which is also cooled and crushed using the refining slag and injected from an injection system, is used in a factory in consideration of the influence of viscosity and foamability, and treats a large amount of refining slag.
The comprehensive utilization of steel slag and refining slag is a very important and urgent problem to be solved. For decades, scholars at home and abroad carry out a great deal of research work, and obtain a certain application effect, and particularly, the scholars are successfully applied in the technical fields of recycling refining slag for steel production, making refining slag ingredients as road building materials and the like, the consumption of the refining slag is large, but most of research results are limited by economic cost factors and cannot realize industrial application. A large amount of refining slag in China limits the proportion in building materials due to high calcium content, and is still stockpiled on a stock dump at present. Although the recycling of the steel industry is used as the maximum consumption body for recycling the refining slag at present, a large amount of waste slag is still discharged into the environment after limited recycling. The slag properties analyzed above show that the refining slag as a raw material or an additive can be applied not only to industrial recycling, but also to the preparation of waste gas and the treatment of waste water to make an adsorption or absorption material, and has the advantages of large utilization amount of the refining slag, low cost, simple process, treatment of waste with waste, etc., and has a broad development prospect, and will become an important research direction in the refining slag utilization field.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problems in the prior art, and provides a resource recycling cold refining slag system.
Therefore, the utility model adopts the following technical scheme:
a cold refining slag system for recycling resources comprises a converter and a blowing tank, wherein a rotary joint is arranged on the side wall of the converter, a plurality of raw material spraying guns are arranged in the converter and used for spraying raw materials into the converter, and the spraying guns are positioned at the bottom of the converter; the top of jetting jar is connected with the pressurization trachea that is used for increasing jetting jar pressure and to the first conveying pipeline of the inside input raw materials of jetting jar, and the lateral wall of jetting jar is connected with the fluidization trachea that is used for fluidization refining slag, and the bottom of jetting jar is connected with the sprayer, the sprayer is connected with the second conveying pipeline, the second conveying pipeline is connected with rotary joint, rotary joint is connected with the third conveying pipeline, the third conveying pipeline is connected with the distributor, the distributor is connected with a plurality of defeated material branch pipes, defeated material branch pipe is connected with the spray gun.
Furthermore, a blow-off valve is arranged on the blowing tank.
Furthermore, the rotary joint is connected with a circular seam air pipe.
Further, the ejector is connected with a gas booster pump which supplies high-pressure gas to the ejector.
The beneficial effects of the utility model reside in that: the system and the method are suitable for 50-350 tons of converters, can save converter slagging materials, reduce the consumption of lime and a slagging agent, reduce the erosion of a furnace lining refractory material in the smelting process of the converter, improve the slagging speed of the converter, facilitate the dephosphorization at the initial stage of the converter smelting, realize the recycling of iron-containing substances in refining slag, further improve the metal yield and reduce the steelmaking cost.
Drawings
FIG. 1 is a schematic structural diagram of a recycling cold refining slag system;
in the figure, 1-converter, 2-blowing tank, 3-rotary joint, 4-spray gun, 5-pressurized air pipe, 6-first conveying pipeline, 7-fluidized air pipe, 8-ejector, 9-second conveying pipeline, 10-third conveying pipeline, 11-distributor, 12-conveying branch pipe, 13-blow-off valve, 14-circular seam air pipe and 15-gas booster pump.
Detailed Description
As shown in fig. 1, a resource recycling cold refining slag system, which comprises a converter 1 and an injection tank 2, wherein the injection tank 2 is a pulverized coal injection tank commonly used in the field, a rotary joint 3 is arranged on a side wall of the converter 1, a plurality of injection guns 4 for injecting raw materials into the converter 1 are arranged in the converter 1, the injection guns 4 are positioned at the bottom of the converter 1, and specifically, the injection guns 4 are double-layer sleeve type injection guns for preventing the over-high temperature in the converter 1 from damaging the injection guns 4.
The top of the injection tank 2 is connected with a pressurized air pipe 5 for increasing the pressure in the injection tank 2 and a first material conveying pipe 6 for inputting raw materials into the injection tank, and the pressurized air pipe 5 can convey nitrogen into the injection tank 2; the side wall of the blowing tank 2 is connected with a fluidizing gas pipe 7 for fluidizing refining slag, and the fluidizing gas pipe 7 arranged on the side wall can convey nitrogen gas to the interior of the refining slag in the blowing tank 2 so that the refining slag is fluidized to facilitate subsequent treatment;
the bottom of jetting jar 2 is connected with sprayer 8, sprayer 8's effect is carried the mixture of fluidized refining slag and nitrogen gas to converter 1, sprayer 8 leads to and is connected with second conveying pipeline 9, second conveying pipeline 9 rotary joint 3 is connected, rotary joint 3 is connected with third conveying pipeline 10, the other end of third conveying pipeline 10 is connected with distributor 11, distributor 11 is connected with a plurality of conveying branch pipes 12, wherein the quantity of conveying branch pipe 12 is corresponding with spray gun 4, conveying branch pipe 12 is connected with spray gun 4.
In order to prevent the pressure in the injection tank 2 from becoming excessive, the injection tank 2 is provided with a relief valve 13 for releasing and relieving the pressure of the gas inside the injection tank 2 when the pressure therein becomes excessive.
The rotary joint 3 is also connected with an annular seam gas pipe 14, and the annular seam gas pipe 14 can introduce gas into the rotary joint 3 and is used for preventing the refining slag and gas mixture from losing from the gap of the rotary joint 3.
The ejector 8 is connected to a gas booster pump 15 that supplies high-pressure gas to the ejector 8.
When the utility model is used, when the steel finished product is smelted, firstly, the refining slag is added into the injection tank 2 through the first material conveying pipe 6, then the nitrogen is input into the injection tank 2 through the pressurizing air pipe 5, the pressure in the injection tank 2 is increased, meanwhile, the nitrogen is input through the fluidizing air pipe 7, because the fluidizing air pipe 7 is connected with the middle part of the side wall of the injection tank 2, the nitrogen input through the fluidizing air pipe 7 can directly enter the refining slag to fluidize the refining slag, the fluidized refining slag is conveyed into the rotary joint 3 through the second material conveying pipe 9 under the action of the ejector 8, the ejector 8 is powered by the gas booster pump 15, when the fluidized refining slag enters the rotary joint 3, the fluidized refining slag enters the distributor 11 through the third material conveying pipe 10 for distribution, reaches the spray gun 4 through each material conveying branch pipe 12, the spray gun 4 is sprayed into the converter 1 from the bottom to the bottom, the method helps to carry out the smelting operation of steel production, during the process, free CaO in the refining slag penetrates through the interior of the molten steel and rises to a steel slag interface after being sprayed from the bottom of the converter, and the free CaO directly contacts with the molten steel in the process to participate in dephosphorization and desulfurization reactions in the converter, so that silicate is generated, and the dephosphorization and desulfurization efficiency of the converter is improved.
Claims (4)
1. The cold refining slag recycling system is characterized by comprising a converter (1) and a blowing tank (2), wherein a rotary joint (3) is arranged on the side wall of the converter (1), a plurality of spray guns (4) for spraying raw materials into the converter (1) are arranged in the converter (1), and the spray guns (4) are positioned at the bottom of the converter (1); the top of jetting jar (2) is connected with pressurization trachea (5) that are used for increasing jetting jar (2) pressure and to first conveying pipeline (6) of jetting jar (2) inside input raw materials, and the lateral wall of jetting jar (2) is connected with fluidization trachea (7) that are used for fluidization refining sediment, and the bottom of jetting jar (2) is connected with sprayer (8), sprayer (8) are connected with second conveying pipeline (9), second conveying pipeline (9) are connected with rotary joint (3), rotary joint (3) are connected with third conveying pipeline (10), third conveying pipeline (10) are connected with distributor (11), distributor (11) are connected with a plurality of conveying branch pipes (12), conveying branch pipe (12) are connected with spray gun (4).
2. A resource recycling cold refining slag system according to claim 1, characterized in that the blowing tank (2) is provided with a blow-off valve (13).
3. A resource recycling cold refining slag system according to claim 1, characterized in that the rotary joint (3) is connected with a circular seam gas pipe (14).
4. A resource recycling cold refined slag system according to claim 1, characterized in that said ejector (8) is connected to a gas booster pump (15) that provides high pressure gas to the ejector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021326345.3U CN212655812U (en) | 2020-07-08 | 2020-07-08 | Cold-state refining slag recycling system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021326345.3U CN212655812U (en) | 2020-07-08 | 2020-07-08 | Cold-state refining slag recycling system |
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| CN212655812U true CN212655812U (en) | 2021-03-05 |
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| CN202021326345.3U Active CN212655812U (en) | 2020-07-08 | 2020-07-08 | Cold-state refining slag recycling system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111748671A (en) * | 2020-07-08 | 2020-10-09 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Cold-state refining slag recycling system and method |
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2020
- 2020-07-08 CN CN202021326345.3U patent/CN212655812U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111748671A (en) * | 2020-07-08 | 2020-10-09 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Cold-state refining slag recycling system and method |
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