CN111366000A

CN111366000A - Furnace bottom oxygen adding device and rock wool cupola comprising same

Info

Publication number: CN111366000A
Application number: CN202010281491.7A
Authority: CN
Inventors: 李学国; 李正文; 高钦磊; 连宇光; 周程
Original assignee: Taishi Rock Wool Co ltd
Current assignee: Taishi Rock Wool Co ltd
Priority date: 2020-04-10
Filing date: 2020-04-10
Publication date: 2020-07-03

Abstract

The utility model relates to a furnace bottom oxygenation device and a rock wool cupola comprising the same, belonging to the technical field of steel smelting, the device comprises a rock wool cupola, wherein a plurality of oxygen inlets are uniformly arranged on the furnace bottom of the rock wool cupola; a pouring platform is arranged above each oxygen inlet; a downward groove is formed in the top of the pouring table; a lower base and an upper cover are arranged in the groove; a cavity is formed between the lower base and the upper cover; an oxygen inlet and outlet channel is arranged at the bottom of the pouring platform; one end of the oxygen inlet and outlet channel is connected with the oxygen inlet; the other end is communicated with the cavity; and a plurality of oxygen outlet holes communicated with the accommodating cavity are uniformly formed in the surface of the upper cover. The furnace bottom oxygenation device can be used for injecting oxygen into molten iron to oxidize iron in the molten iron into ferric oxide, and the ferric oxide enters the rock wool melt zone, so that the waste of energy and the reduction of yield caused by the molten iron discharging time are reduced, and the energy consumption of the whole cupola furnace is saved.

Description

Furnace bottom oxygen adding device and rock wool cupola comprising same

Technical Field

The utility model belongs to the technical field of steel smelting, in particular to a furnace bottom oxygenation device and a rock wool cupola furnace comprising the same.

Background

Along with the development of national economy and the implementation of national energy-saving policies, the demand of rock and mineral wool products for heat preservation and insulation of buildings and industries is increasing. The steel waste slag is used as a raw material for producing rock wool and has a rapidly growing trend, and the development of a cupola furnace capable of smelting molten iron and rock wool simultaneously is imperative.

The known rock wool cupola furnace can produce molten iron during processing of rock wool, the molten iron is gathered at the bottom of the furnace, operators are required to discharge the molten iron regularly during processing, usually, the molten iron needs to be put for one time within 4-5 hours, and the time for discharging the molten iron every time is 30 minutes, but the cupola furnace cannot work during discharging the molten iron, and meanwhile, some iron elements exist in the molten iron, so that the current discharge can cause yield reduction and energy waste.

Disclosure of Invention

To above-mentioned technical problem, for solving not enough among the prior art, this disclosure provides a stove bottom oxygenation device and contains device's rock wool cupola. The furnace bottom oxygenation device can be used for injecting oxygen into molten iron to oxidize iron in the molten iron into ferric oxide, and the ferric oxide enters the rock wool melt zone, so that the waste of energy and the reduction of yield caused by the molten iron discharging time are reduced, and the energy consumption of the whole cupola furnace is saved.

The utility model discloses at least one embodiment of the present disclosure discloses a furnace bottom oxygenation device, which comprises a furnace bottom, wherein a plurality of oxygen inlets are uniformly arranged on the furnace bottom; a pouring platform is arranged above each oxygen inlet; a downward groove is formed in the top of the pouring table; a lower base and an upper cover are arranged in the groove; a cavity is formed between the lower base and the upper cover; an oxygen inlet and outlet channel is arranged at the bottom of the pouring platform; one end of the oxygen inlet and outlet channel is connected with the oxygen inlet; the other end is communicated with the cavity; and a plurality of oxygen outlet holes communicated with the accommodating cavity are uniformly formed in the surface of the upper cover.

Furthermore, the oxygen inlets are circumferentially arranged at the bottom of the cupola furnace.

Furthermore, a circular boss is arranged at the center of the lower base; the oxygen inlet and outlet channel is communicated with the top surface of the circular boss.

Further, the height of the circular boss is at least higher than the height of half of the cavity.

Further, the top surface of the circular boss is connected with a valve cover; the valve cover can be separated from the top surface of the circular boss and move up and down under the flow impact of oxygen.

Further, the valve cover is a T-shaped valve cover; the vertical cylindrical part of the T-shaped valve cover extends into the oxygen inlet and outlet channel; the diameter of the cylindrical portion is smaller than the diameter of the oxygen ingress and egress passage.

Furthermore, a groove is arranged at the center of the bottom surface of the upper cover; the groove is used for accommodating the valve cover separated from the boss under the impact of oxygen airflow.

Further, the oxygen inlet is also connected with an oxygen pipeline; and a flowmeter is arranged on the oxygen pipeline.

Further, the oxygen outlets are circumferentially arranged on the top surface of the upper cover.

At least one embodiment of this disclosure still discloses a rock wool cupola, and this cupola includes an above-mentioned bottom oxygenation device of arbitrary above-mentioned.

Compared with the prior art, the method has the following beneficial effects:

1. the bottom oxygenation device disclosed by the invention can be used for filling oxygen into molten iron, oxidizing iron in the molten iron into ferric oxide, and enabling the ferric oxide to enter a rock wool molten body area, so that the raw material consumption is reduced, the cotton forming rate is increased, and meanwhile, by adding the bottom oxygenation device, the molten iron time can be prolonged to 24 hours for once molten iron placement, and the molten iron placement time is 10 minutes. The waste of energy and the reduction of yield caused by the time of discharging molten iron are reduced, and the energy consumption of the whole cupola furnace is saved.

2. The central point of this open in-deck lower base of pouring puts and sets up circular boss, and the central point of circular boss puts highly be higher than at least and holds half of chamber height, so hold the chamber and can hold the molten iron that flows in, for example oxygen stops spouting when equipment trouble, and the molten iron flows into and holds this boss of intracavity and avoid the molten iron directly to get into oxygen and advance out of the passageway.

3. The port of the oxygen passageway of this internal bench of pouring is connected with T type valve gap, can guarantee like this that oxygen stops spouting in the time, the valve gap can cover the oxygen passageway, further avoids the molten iron to flow into the oxygen passageway.

Drawings

FIG. 1 is a schematic view of the overall structure of a rock wool cupola furnace according to the present disclosure;

FIG. 2 is a cross-sectional view of a casting table of the present disclosure.

Detailed Description

The present disclosure is further described with reference to the drawings and the detailed description below.

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Referring to fig. 1, a rock wool cupola 1 is shown, which generates molten iron when processing rock wool and collects the molten iron at the bottom of a furnace, and an operator is required to discharge the molten iron periodically during the processing process, usually the molten iron is discharged for 4-5 hours, and the time for discharging the molten iron each time is 30 minutes; however, the cupola furnace is not operated when the molten iron is discharged, which causes waste of energy and reduction of yield.

In order to solve the technical problem, the rock wool cupola furnace bottom oxygenation device disclosed by the embodiment is characterized in that a plurality of oxygen inlets 2 are uniformly arranged on the furnace bottom of a rock wool cupola furnace 1; each oxygen inlet 2 is connected with an oxygen pipeline 3, the terminal of the oxygen pipeline is connected with an oxygen output device, such as an oxygen tank, and oxygen enters molten iron at the bottom of the furnace through the oxygen jet orifice 2 to react with the iron to generate ferric oxide. In order to realize better detection, each oxygen pipeline is also provided with a flowmeter 4 respectively, the oxygen quantity entering the bottom of the cupola furnace can be accurately controlled through the flowmeters to achieve better reaction degree of the oxygen and the molten iron, the oxygen is uniformly sent into a molten iron area at the bottom of the cupola furnace, the oxygen and the molten iron react to generate ferric oxide, and the generated ferric oxide enters a top melt area and flows out through a siphon port 5 to become a part of the rock wool again.

In order to better realize that oxygen enters molten iron, a pouring platform 6 is fixed above an oxygen inlet on the bottom surface of the furnace bottom, and each pouring platform 6 corresponds to one oxygen inlet; in the embodiment, the oxygen inlets can be uniformly distributed on the circumference of the furnace bottom, the specific number can be determined according to the size of the road furnace bottom, the pouring table is poured by some high-temperature-resistant materials and fixed on the furnace bottom, and the specific shape of the pouring table is not limited too much and can be a cylindrical or trapezoidal round table and the like. The specific limitations may be imposed on the specific situation.

The internal structure of the pouring table is shown in fig. 2, a downward groove is arranged at the top of the pouring table 6, a lower base 61 is arranged at the bottom surface of the groove, an upper cover 62 is connected at the upper part of the lower base, the top surface of the upper cover is flush with the top surface of the pouring table, a cavity 63 is formed between the lower base and the upper cover, specifically, the cavity can be cylindrical or in other shapes, an oxygen inlet and outlet channel 64 is also arranged at the bottom of the pouring table, one end opening of the oxygen inlet and outlet channel corresponds to an oxygen inlet at the bottom of the furnace, the other end opening is connected with the internal cavity 63 of the pouring table, a plurality of oxygen outlets 65 are uniformly arranged on the surface of the top surface of the upper cover in the pouring table, when molten iron flows through the top of the pouring table, oxygen enters the molten iron through the oxygen outlets at the top of the pouring table along the oxygen inlet and outlet channel to, because the molten iron is liquid, certain oxygen pressure can be kept to ensure that the molten iron cannot enter the pouring platform.

The oxygen access passage in the embodiment is connected with the inside of the pouring table, the boss is arranged at the central position of the lower base in the pouring table, the boss has a certain height which is at least larger than half of the height of the accommodating cavity, the upper surface of the boss is provided with a through hole, the oxygen access passage is communicated with the upper surface through the through hole, the shape of the boss is not limited too much, and the oxygen access passage can be a cylindrical or trapezoidal round table and the like. So set up the boss and be this disclosed stove bottom oxygenation device and let in oxygen to the stove bottom always, when equipment broke down, for example can't send into oxygen, hold the atmospheric pressure of intracavity and reduce, and molten iron can flow into and hold the intracavity, sets up the boss and is exactly in order to prevent that the molten iron from flowing into the oxygen passageway.

In this embodiment, the shape of the cavity inside the casting platform may preferably be cylindrical, and the size of the cavity is determined according to the size of the specific casting platform.

In order to further prevent molten iron from entering the oxygen channel, a valve cover 66 is further installed on the upper surface of the boss of the pouring platform lower base in the embodiment, the valve cover 66 can be separated from the upper surface of the boss under the impact action of oxygen flow, and when oxygen stops being fed, the valve cover can automatically fall onto the upper surface of the boss to seal the oxygen channel and prevent foreign matters from entering the oxygen to cause blockage.

In the embodiment, a groove 67 is formed in the center of the bottom surface of the upper cover in the pouring table, the shape of the groove is matched with the outline of the valve cover, and the size of the whole body is larger than that of the valve cover; the groove is used for accommodating the valve cover and ensuring that the valve cover cannot deviate from the central position when being flushed to the top cover by air flow, so that the valve cover can accurately fall onto the upper surface of the boss when oxygen delivery is stopped, and the through hole of the upper surface is sealed.

Specifically, the valve cover in this embodiment may be a T-shaped valve cover, and a lower cylindrical portion of the T-shaped valve cover extends into the oxygen inlet/outlet passage through the through hole on the upper surface of the boss, and the cylindrical portion may serve as a guide for the valve cover during the falling process to ensure that the valve cover smoothly covers the through hole on the boss, and the diameter of the cylindrical portion is smaller than that of the oxygen inlet/outlet passage.

The above description is only exemplary of the present disclosure, and not intended to limit the present disclosure to the particular embodiments, but is intended to cover all modifications, equivalents, improvements, and equivalents included within the spirit and scope of the present disclosure.

Other technical features than those described in the specification are known to those skilled in the art, and are not described in detail herein in order to highlight the novel features of the present disclosure.

Claims

1. The utility model provides a stove bottom oxygenation device which characterized in that includes the stove bottom:

a plurality of oxygen inlets are uniformly arranged on the furnace bottom; a pouring platform is arranged above each oxygen inlet;

a downward groove is formed in the top of the pouring table; a lower base and an upper cover are arranged in the groove; a cavity is formed between the lower base and the upper cover; an oxygen inlet and outlet channel is arranged at the bottom of the pouring platform; one end of the oxygen inlet and outlet channel is connected with the oxygen inlet; the other end is communicated with the cavity; and a plurality of oxygen outlet holes communicated with the accommodating cavity are uniformly formed in the surface of the upper cover.

2. The bottom-oxygenation device of claim 1, wherein said oxygen inlets are circumferentially arranged in the bottom.

3. The bottom oxygen adding device of claim 1, wherein the lower base is provided with a circular boss at the center; the oxygen inlet and outlet channel is communicated with the top surface of the circular boss.

4. The bottom oxygen adding device of claim 3, wherein said circular boss is at least half as high as said cavity.

5. The bottom-oxygen adding device of claim 4, wherein the top surface of said circular boss is connected with a valve cover; the valve cover can be separated from the top surface of the circular boss and move up and down under the flow impact of oxygen.

6. The bottom oxygenating device of claim 5 wherein said valve cover is a T-shaped valve cover; the vertical cylindrical part of the T-shaped valve cover extends into the oxygen inlet and outlet channel; the diameter of the cylindrical portion is smaller than the diameter of the oxygen ingress and egress passage.

7. The bottom-oxygen adding device as claimed in claim 4, wherein a groove is formed in the center of the bottom surface of the upper cover; the groove is used for accommodating the valve cover separated from the boss under the impact of oxygen airflow.

8. The bottom-oxygen adding apparatus of claim 1, wherein said oxygen inlet is further connected to an oxygen pipe; and a flowmeter is arranged on the oxygen pipeline.

9. The bottom-loading oxygen transfer system of claim 1 wherein said oxygen outlets are circumferentially spaced about said top surface of said top cover.

10. A rock wool cupola furnace comprising a bottom oxygenation device as claimed in any one of claims 1 to 9.