阅读说明：本技术 高炉多出残铁的结构及操作方法 (Structure and operation method for discharging more residual iron from blast furnace ) 是由 岳彩东 曾华锋 张良 黄守恒 黄昌荣 温怀礼 柳林 刘明 郭刚 刘旭 李�荣 于 2021-07-14 设计创作，主要内容包括：本发明涉及高炉维修领域,尤其是一种高炉大修时尽可能多出残铁,从而降低工人的劳动强度的和杜绝烟尘外溢的高炉多出残铁的结构及操作方法。本发明解决其技术问题所采用的技术方案是：高炉多出残铁的结构,包括高炉炉体,所述高炉炉体侧壁设置有液态渣铁排出口,所述高炉炉体内壁底部的死铁层的下方有炉底实际侵蚀线,其中,液态渣铁排出口的下方的高炉炉体侧壁上,设置有测量残铁口以及位于测量残铁口下方的实际残铁口,其中,测量残铁口和实际残铁口的中心轴线与炉底实际侵蚀线相交。本发明尤其适用于高炉大修的炉缸内残铁清除作业之中。(The invention relates to the field of blast furnace maintenance, in particular to a structure and an operation method for excess residual iron of a blast furnace, which can reduce the labor intensity of workers and prevent smoke from overflowing as much as possible during the overhaul of the blast furnace. The technical scheme adopted by the invention for solving the technical problems is as follows: the structure of the many residual irons of blast furnace, including the blast furnace body, blast furnace body lateral wall is provided with liquid slag iron discharge port, there is the actual erosion line of stove bottom below the dead iron layer of blast furnace body inner wall bottom, wherein, on the blast furnace body lateral wall of the below of liquid slag iron discharge port, be provided with the actual residual iron notch that measures residual iron notch and be located to measure residual iron notch below, wherein, the central axis that measures residual iron notch and actual residual iron notch intersects with the actual erosion line of stove bottom. The invention is particularly suitable for the residual iron removing operation in the hearth of the blast furnace overhaul.)

1. The structure of the many residual irons of blast furnace, including blast furnace body (1), blast furnace body (1) lateral wall is provided with liquid slag iron discharge port (113), its characterized in that: there is real erosion wire of stove bottom (6) below the iron layer of dying (5) of blast furnace body (1) inner wall bottom, wherein, on blast furnace body (1) lateral wall of the below of liquid slag iron discharge port (113), be provided with and measure incomplete iron notch (8) and be located and measure incomplete iron notch (9) of reality of incomplete iron notch (8) below, wherein, the central axis that measures incomplete iron notch (8) and actual incomplete iron notch (9) intersects with real erosion wire of stove bottom (6).

2. The structure of the blast furnace for discharging more residual iron according to claim 1, wherein: the depth of the actual residual iron notch (9) extending into the blast furnace body (1) is larger than the depth of the measured residual iron notch (8) extending into the blast furnace body (1).

3. The structure of the blast furnace for discharging more iron residues as defined in claim 2, wherein: the depth of the actual residual iron notch (9) extending into the blast furnace body (1) is 0.5m deeper than the depth of the measured residual iron notch (8) extending into the blast furnace body (1).

4. The structure of the blast furnace for discharging more iron residues as claimed in claim 1, 2 or 3, wherein: the actual residual iron notch (9) is arranged 300mm below the measured residual iron notch (8).

5. The operating method using the structure of the blast furnace for discharging the surplus iron according to claim 1, comprising the steps of:

a. measuring the temperature of the furnace skin at the position of the blast furnace body (1), then calculating by combining the temperature of a thermocouple at the bottom of the blast furnace body (1) to find out the deepest position eroded by the bottom of the blast furnace, and obtaining an actual erosion line (6) discharged from the bottom of the blast furnace;

b. by taking the actual erosion line (6) at the bottom of the furnace as a reference, firstly opening a hole to obtain a measured residual iron notch (8), and then opening a hole below the measured residual iron notch (8) to obtain an actual residual iron notch (9);

c. and when the residual iron is produced, firstly burning the lower actual residual iron notch (9), and if the residual iron cannot be produced, burning the measured residual iron notch (8) on the actual residual iron notch (9) to obtain the residual iron.

Technical Field

The invention relates to the field of maintenance of blast furnaces, in particular to a structure and an operation method for excess residual iron of a blast furnace.

Background

During the overhaul of the blast furnace, in order to shorten the construction period, a dead iron layer in a hearth and residual iron in a space formed by the erosion of a hearth brick are discharged. Along with the continuous improvement of the environmental protection requirement, the traditional mode of discharging the residual iron from the blast furnace can not meet the current environmental protection requirement, the residual iron in the traditional furnace hearth is decomposed by oxygen after the blast furnace is decomposed, the construction period is not only influenced, but also a large amount of smoke dust is caused to overflow when the residual iron is burnt. Therefore, the conventional mode has failed to satisfy the need for safe production.

Disclosure of Invention

The invention aims to solve the technical problem of providing a structure and an operation method for excess residual iron of a blast furnace, which can reduce the labor intensity of workers and prevent smoke from overflowing by producing excess residual iron as much as possible during the overhaul of the blast furnace.

The technical scheme adopted by the invention for solving the technical problems is as follows: the structure of the many residual irons of blast furnace, including the blast furnace body, blast furnace body lateral wall is provided with liquid slag iron discharge port, there is the actual erosion line of stove bottom below the dead iron layer of blast furnace body inner wall bottom, wherein, on the blast furnace body lateral wall of the below of liquid slag iron discharge port, be provided with the actual residual iron notch that measures residual iron notch and be located to measure residual iron notch below, wherein, the central axis that measures residual iron notch and actual residual iron notch intersects with the actual erosion line of stove bottom.

Furthermore, the depth of the actual residual iron notch extending into the blast furnace body is larger than the depth of the measured residual iron notch extending into the blast furnace body.

Further, the depth of the actual residual iron notch extending into the blast furnace body is 0.5m deeper than the depth of the measured residual iron notch extending into the blast furnace body.

Further, the actual residual iron notch is arranged 300mm below the measured residual iron notch.

Further, the operation method of the blast furnace for discharging more residual iron comprises the following steps: a. measuring the temperature of the furnace skin at the furnace body part of the blast furnace, then calculating by combining with the temperature of a thermocouple at the furnace bottom of the blast furnace body, and finding out the deepest part eroded at the furnace bottom to obtain an actual erosion line out of the furnace bottom; b. taking the actual erosion line of the furnace bottom as a reference, firstly opening a hole to obtain a measured residual iron notch, and then opening a hole below the measured residual iron notch to obtain an actual residual iron notch; c. and when the residual iron is produced, firstly burning the lower actual residual iron notch, and if the residual iron cannot be produced, burning the measured residual iron notch on the actual residual iron notch to obtain the residual iron.

The invention has the beneficial effects that: in actual operation, because the existence of actual scrap iron mouth and measurement scrap iron mouth, the effectual outflow position that reduces blast furnace scrap iron lets the scrap iron in the crucible change whole outflow. During actual operation, the residual iron outflow operation is carried out through the actual residual iron notch, once the residual iron notch can not be burnt out, the standby residual iron notch on the residual iron notch is used for measuring the residual iron notch immediately, and therefore the process of discharging the residual iron can not be influenced. The invention is particularly suitable for the residual iron removing operation in the hearth of the blast furnace overhaul.

Drawings

FIG. 1 is a schematic view showing the position of a taphole according to the invention on a furnace shell.

FIG. 2 is a schematic diagram showing the positional relationship between the taphole and the actual erosion line of the furnace bottom according to the present invention.

Labeled as: the blast furnace comprises a blast furnace body 1, a pressed material 2, a blast furnace water-through cooling wall 3, a furnace body inner wall surface 4, a dead iron layer 5, a furnace bottom actual erosion line 6, a blast furnace elephant foot erosion part 7, a measurement residual iron notch 8, an actual residual iron notch 9, blast furnace residual bottom bricks 10, a blast furnace tuyere 112, an iron tap 113 and a furnace skin 18.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

The structure of the blast furnace with multiple residual irons as shown in fig. 1 and fig. 2 comprises a blast furnace body 1, wherein a liquid iron slag outlet 113 is formed in the side wall of the blast furnace body 1, a furnace bottom actual erosion line 6 is arranged below a dead iron layer 5 at the bottom of the inner wall of the blast furnace body 1, a measurement residual iron notch 8 and an actual residual iron notch 9 positioned below the measurement residual iron notch 8 are arranged on the side wall of the blast furnace body 1 below the liquid iron slag outlet 113, and the central axes of the measurement residual iron notch 8 and the actual residual iron notch 9 are intersected with the furnace bottom actual erosion line 6.

In actual operation, generally measuring the temperature of the furnace skin at the furnace body 1 of the blast furnace in advance, and then calculating by combining the thermocouple temperature at the bottom of the blast furnace to find out the deepest part corroded by the bottom of the blast furnace, namely the actual corrosion line 6 at the bottom of the blast furnace; secondly, when the blast furnace is stopped and residual iron is discharged, holes are respectively formed at the selected positions, namely the position of about 300mm below the residual iron notch 8 and the position of about 300mm below the residual iron notch 8, so that the actual residual iron notch 9 is obtained. Thus, two residual iron holes are formed, when the residual iron is discharged, the lower residual iron eye, namely the actual residual iron hole 9, is firstly burnt, and if the residual iron hole cannot be discharged, the upper residual iron eye is burnt, namely the residual iron hole 8 is measured.

Because the furnace hearth erosion boundary, namely the actual erosion line 6 of the furnace bottom, is in a pot bottom shape, generally, in order to enable each residual iron notch to have a better residual iron outflow effect, the depth of the actual residual iron notch 9 extending into the blast furnace body 1 is preferably greater than the depth of the measured residual iron notch 8 extending into the blast furnace body 1. In combination with practice, it is preferable that the actual scrap hole 9 at the lower part is deeper by about 0.5m than the measured scrap hole 8 at the upper part, so that the scrap in the hearth can be guaranteed to be completely discharged to the greatest extent possible.

By adopting the device, the maximum residual iron is less than 2.0t when the furnace hearth is cleaned, not only 8 shifts are saved in the working period of the blast furnace, but also the condition that the residual iron is burnt by the furnace front working and yellow smoke is produced is avoided. The invention is suitable for the overhaul shutdown of all blast furnaces, has considerable economic benefit and environmental protection benefit, has very obvious technical advantage and very wide market popularization prospect.