A new type of mud sleeve structure for solving spattering of blast furnace iron notch based on sealing component

Abstract

The utility model belongs to the field of steel metallurgy technology relates to a new type of mud cover structure based on sealing component solves blast furnace iron mouth spatter. Involved in a new type of mud cover structure based on sealing component solves blast furnace iron mouth spatter is provided with refractory sealing component in the iron mouth mud cover, refractory sealing component is prismatic or cylinder, and one end is embedded in the lining brick in the hearth, and the other end at least exceeds the self-flow material layer of cooling wall outside, that is, the length of refractory sealing component completely covers the cooling wall and the ramming material and self-flow material layer on both sides. The utility model fundamentally avoids the occurrence of iron mouth iron spatter by adopting sealing component to block the last passage of the gas in the furnace into the molten iron flow, the sealing component mainly plays the role of isolating gas, and the service environment is relatively friendly, and the service life is long, and the maintenance period can be greatly prolonged, and the comprehensive cost can be reduced.

Description

Technical Field

[0001] This utility model belongs to the field of iron and steel metallurgy technology, specifically relating to a novel mud sleeve structure based on sealing components to solve the problem of blast furnace taphole splashing. Background Technology

[0002] Blast furnaces are currently the mainstream ironmaking equipment and process. Their structure includes the furnace throat, furnace body, furnace waist, furnace belly, and hearth. The hearth's function is to temporarily hold the molten iron produced by reduction. During the ironmaking process, molten iron needs to be discharged from the taphole on the side of the hearth at regular intervals. During the discharge of molten iron, splashing often occurs, leading to the following hazards: burns and scalds, inadequate dust removal and environmental pollution, reduced blast furnace output and economic losses, increased labor intensity for workers, impaired taphole sealing operations, and shortened lifespan of the main blast furnace.

[0003] To address the problem of molten iron splashing at the taphole, utility model patent CN210683825U proposes a device to prevent slag and iron splashing, utility model patent CN213060907U proposes a splash prevention device for the main trough, and utility model patent CN218491787U proposes a taphole protection device based on refractory materials. All of these patents design protective devices for areas such as the outside of the taphole and the upper part of the main trough. However, these methods only provide protection after splashing has occurred, aiming to reduce negative impacts but not completely eliminate splashing. Furthermore, these additional devices require timely cleaning, maintenance, or replacement based on the splashing situation, which increases costs.

[0004] During blast furnace production, molten iron is discharged under the combined action of the gravity of the liquid slag and iron and the high gas pressure inside the blast furnace. The direct cause of molten iron splashing at the taphole is gas leakage. The high-pressure gas flow from the hearth mixes with the molten iron flow in the channel, disrupting the original dynamic balance and causing the liquid slag and iron to splash when discharged from the taphole lining. The causes of gas leakage are multifaceted, such as: the ramming material and self-flowing castable between the cooling wall and the inner carbon bricks, and the self-flowing castable between the cooling wall and the furnace shell, all undergo thermal contraction during blast furnace operation, creating gaps; the tuyere sleeve and tuyere composite bricks, as well as the buffer slurry between the bricks, undergo thermal contraction, creating gaps, which eventually connect with the gaps on both sides of the cooling wall, forming gas leakage; the gaps in the refractory masonry of the hearth lining also connect with the gaps on both sides of the cooling wall, forming gas leakage. Utility Model Content

[0005] The purpose of this invention is to propose a novel mud sleeve structure based on sealing components to solve the problem of blast furnace taphole splashing, based on a systematic analysis of the causes of blast furnace taphole splashing.

[0006] To achieve the above objectives, this utility model employs the following technical solution:

[0007] A novel mud sleeve structure for solving blast furnace taphole splashing based on sealing components, comprising: a hearth lining brick installed inside the blast furnace shell; a cooling wall installed between the hearth lining brick and the inner wall of the furnace shell; the gap between the cooling wall and the hearth lining brick filled with ramming material or self-flowing material; a taphole mud sleeve installed on one side of the furnace shell; the taphole mud sleeve having an iron tapping channel extending into the hearth lining brick; characterized in that... The iron taphole mud sleeve is provided with a refractory material sealing component; the refractory material sealing component is prism or cylinder, one end of which is embedded in the inner lining brick of the hearth, and the other end extends at least beyond the self-flowing material layer on the outside of the cooling wall. That is, the length of the refractory material sealing component completely covers the cooling wall and the ramming material and self-flowing material layer on both sides, so that after the gas in the furnace leaks through various gaps to the gaps on both sides of the cooling wall, the refractory material sealing component plays a sealing and isolation role before it enters the molten iron channel.

[0008] The refractory material sealing component has a hollow channel in its central core that matches the size of the iron outlet channel.

[0009] The side of the refractory material sealing component has a wavy pattern to improve the bonding stability with the surrounding mud jacket castable. The wavy pattern can be a square pulse, a semi-circular pulse, a triangular pulse, or a sine wave pulse, etc.

[0010] The refractory material sealing component is made of oxide refractory material, non-oxide refractory material, or oxide-non-oxide composite refractory material.

[0011] Refractory material sealing components have low air permeability, which can effectively seal against the permeation of gases inside the furnace.

[0012] This utility model proposes a novel mud sleeve structure based on a sealing component to solve the problem of blast furnace taphole splashing. Using the above technical solution, it has the following beneficial effects:

[0013] 1. By using sealing components to block the final channel through which gas leaks into the molten iron flow, the occurrence of molten iron splashing at the tapping point can be fundamentally avoided.

[0014] 2. The sealing components mainly serve to isolate gases, have a relatively friendly service environment, a long service life, and can significantly extend the maintenance cycle;

[0015] No longer is it necessary to add protective devices and measures to the outside of the taphole or the main ditch, which can reduce overall costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2-1 , 2-2 Figures 2-3 are schematic diagrams of the sealing components with different textures according to this utility model;

[0018] Figure 3 This is a schematic diagram of another overall structure of the present invention.

[0019] In the diagram: 1-furnace shell; 2-self-flowing material layer; 3-cooling wall; 4-ramming material or self-flowing material layer; 5-hearth lining brick; 6-tap mud sleeve; 7-tap hole; 8-refractory sealing component. Detailed Implementation

[0020] The present invention will be described in conjunction with the accompanying drawings and specific embodiments:

[0021] like Figure 1 As shown, a novel mud sleeve structure for solving blast furnace taphole splashing based on sealing components is disclosed. The furnace shell 1 of the blast furnace taphole is equipped with a hearth lining brick 5; a cooling wall 3 is provided between the hearth lining brick 5 and the inner wall of the furnace shell 1; the gap between the cooling wall 3 and the hearth lining brick 5 is filled with ramming material or self-flowing material 4; the gap between the cooling wall 3 and the inner wall of the furnace shell 1 is filled with self-flowing material 2; a taphole mud sleeve 6 is provided on one side of the furnace shell 1; the taphole mud sleeve 6 has an iron tapping channel 7, and the iron tapping channel 7 extends into the hearth. Inside the inner lining brick; a refractory material sealing component 8 is provided inside the iron taphole mud sleeve 6; the refractory material sealing component 8 is prismatic or cylindrical, with one end embedded in the inner lining brick 5 of the hearth, and the other end extending at least beyond the self-flowing material layer 2 on the outside of the cooling wall. That is, the length of the refractory material sealing component 8 completely covers the cooling wall and the ramming material and self-flowing material layer on both sides, so that after the gas in the furnace leaks through various gaps to the gaps on both sides of the cooling wall, the refractory material sealing component plays a sealing and isolation role before it enters the molten iron channel.

[0022] The refractory material sealing component has a hollow channel in its central core that matches the size of the iron outlet channel.

[0023] The refractory material sealing component has a wavy texture on its side to improve the bonding stability with the surrounding mortar. Figure 2-1 , 2-2 As shown in Figures 2-3, the wave-shaped pattern can be a square pulse, a semi-circular pulse, a triangular pulse, or a sine wave pulse, etc.

[0024] Figure 3One end of the refractory material sealing component 8 described herein is embedded in the furnace hearth lining brick 5, and the other end is flush with the outer side of the mud sleeve. In this embodiment, a non-oxide refractory material is selected as the refractory material sealing component. Its overall appearance is cylindrical, with a length equal to the distance from the furnace hearth lining brick to the taphole. The sides are semi-circular pulsed corrugations, and the central core has a hollow channel that matches the size of the molten iron channel. When constructing the taphole mud sleeve, one end of the sealing component is first embedded in the furnace hearth lining brick, and its channel is aligned with the channel of the lining. Figure 3 The refractory material is poured at the location shown in Figure 6, and tightly integrated with the sealing components to form a taphole sleeve. The sleeve structure prepared using this method can block the final channel through which gas leaks into the molten iron flow, thus fundamentally preventing molten iron splashing at the taphole.

Claims

1. A novel mud sleeve structure for solving blast furnace taphole splashing based on sealing components, wherein a hearth lining brick is installed inside the furnace shell of the blast furnace taphole; a cooling wall is installed between the hearth lining brick and the inner wall of the furnace shell; the gap between the cooling wall and the hearth lining brick is filled with ramming material or self-flowing material; the gap between the cooling wall and the inner wall of the furnace shell is filled with self-flowing material; a taphole mud sleeve is installed on one side of the furnace shell; the taphole mud sleeve has an iron tapping channel, and the iron tapping channel extends into the hearth lining brick; characterized in that: The iron taphole mud sleeve is provided with a refractory material sealing component; the refractory material sealing component is prism or cylinder, one end of which is embedded in the inner lining brick of the furnace hearth, and the other end extends at least beyond the self-flowing material layer on the outside of the cooling wall, that is, the length of the refractory material sealing component completely covers the cooling wall and the ramming material and self-flowing material layer on both sides.

2. The novel mud-sleeve structure for solving blast furnace taphole splashing based on sealing components as described in claim 1, characterized in that: The refractory material sealing component has a hollow channel in its central core that matches the size of the iron outlet channel.

3. The novel mud sleeve structure for solving blast furnace taphole splashing based on sealing components as described in claim 1, characterized in that: The side of the refractory material sealing component has a wavy pattern to improve the bonding stability with the surrounding mud jacket castable. The wavy pattern is a square pulse, a semi-circular pulse, a triangular pulse, or a sine wave pulse.

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