JPS6317990Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to the hearth structure of a metallurgical furnace.

Conventionally, in the case of high-temperature metallurgical furnaces, especially smelting furnaces used in the continuous copper manufacturing process using top blowing lances, the hearth bricks were eroded by avoiding the effects of erosion by the lances or penetration by the blister copper components. To prevent this, the hearth is cooled. That is, as shown in FIG. 6, the cooling pipe 12 is embedded in the stamp material 11 of the hearth brick 10,
Cooling air is introduced into the cooling pipe 12 to cool the hearth.

However, in such a structure in which the cooling pipe 12 is embedded in the hearth, due to the processing of the pipe 12 and its shape, the pipe 12 cannot be disposed over the entire surface of the hearth, resulting in areas that cannot be cooled. Therefore, the cooling of the hearth bricks is insufficient,
There is a risk of water leakage. Furthermore, since the coefficients of thermal expansion of the pipe 12 and the stamp material 11 are different, a clearance is created between them, resulting in poor heat conduction and a decrease in the cooling effect. Moreover, since the behavior of the entire furnace, such as bricks, and the behavior of the cooling pipe 12, etc., do not match, stress is generated between them, and shearing force is applied to the stamp material 11, the bricks, etc., and the stamp material 11 has a clearance. There were problems such as cracks in the bricks and cracks in the bricks.

This idea was made in consideration of the above circumstances, and there are multiple refrigerants between the hearth outer plate installed on the underside of the hearth brick and the plurality of steel members that receive and support this hearth outer plate. By forming the passage, the above-mentioned conventional problems can be solved and the hearth bricks can be cooled appropriately over the entire area, and the structure can be simplified, reducing construction time, labor, and The object is to provide a hearth structure for a metallurgical furnace that can also reduce costs.

This invention will be explained below based on illustrated embodiments.

1 and 2 are schematic diagrams of the hearth structure according to this invention. In the figure, 1 is a hearth brick with a circular planar structure, and on the outside of this hearth brick 1,
A concave mirror-shaped hearth outer plate 2 having the same curvature is provided, and a stamp layer 3 is provided between the hearth bricks 1 and the hearth outer plate 2. Hearth outer plate 2
is supported by a large number of H-type steels (steel materials) 4. The H-shaped steels 4 are arranged parallel to each other along the front and back directions of the paper in FIG. A partition plate 5 that curves along the length of the H-shaped steels 4 is attached between adjacent H-shaped steels 4 . The degree of curvature of the partition plate 5 is adjusted to the curvature of the hearth bottom outer plate 2, as shown in FIG.

Therefore, between each H-type steel 4, there is a box-shaped cooling passage L having the H-type steels 4 as left and right side walls, the bottom outer plate 2 as an upper wall, and the partition plate 5 as a lower wall. are formed in large numbers along the hearth bricks 1 and over the entire lower side of the hearth outer plate 2. At one end of each refrigerant passage L, an inlet 6 for air as a refrigerant is provided, and at the other end of each refrigerant passage L,
An outlet 7 for the introduced refrigerant air is provided.

In this way, in forming the refrigerant passage L, the H-shaped steel 4 that receives and supports the hearth is effectively used without using any special pipe, so the structure of the hearth is simple. , which requires less construction time, labor, and cost.

According to such a hearth structure, by passing air as a refrigerant through each refrigerant passage L on the entire lower surface of the hearth outer plate 2, the hearth bricks 1 can be uniformly distributed over the entire area. Can be cooled. Furthermore, since the hearth outer plate 2 has the same curvature as the hearth bricks 1, the stamp layer 3 between them can be made to have a uniform thickness. Appropriate cooling can be achieved through heat conduction. Therefore, there is no occurrence of cracks or the like in the hearth bricks 1 due to insufficient cooling.

In addition, by providing the partition plate 5 at an appropriate position of each divided refrigerant passage L, each refrigerant passage L
Since the volume of the cooling medium can be minimized, cooling can be performed more efficiently with a smaller amount of cooling medium than in the past.

3 to 5 show specific embodiments of the hearth structure according to this invention, and the same parts as in the above-mentioned example are given the same reference numerals, and the explanation thereof will be omitted.

According to this embodiment, a T-shaped steel 9 equipped with a guide plate 8 in contact with the hearth outer plate 2 is used as a steel material that receives and supports the hearth outer plate 2. It is not welded to the second side and simply receives and supports the hearth bottom shell. And this T-shaped steel 9
A refrigerant passage L similar to that between the H-shaped steels 4 described above is formed between them, and by passing air as a refrigerant through this passage L, the hearth bricks are cooled in the same manner as described above. 1 is designed to be properly cooled as a whole.

Note that the shape of the refrigerant passage L is not limited to the above example and is arbitrary.

As explained above, the hearth structure of the metallurgical furnace according to this invention includes a hearth outer plate provided on the lower side of the hearth brick, a plurality of steel members that receive and support this hearth outer plate, and Since multiple refrigerant passages are formed between the partition plates that are passed between multiple steel members, the hearth bricks can be appropriately cooled over the entire area, and the structure is simple. As a result, construction time, labor and costs can be reduced.
Furthermore, there are effects such as efficient cooling can be performed without using a large amount of cooling medium.

[Brief explanation of drawings]

Figure 1 is a vertical sectional view showing the outline of this invention, Figure 2
The figure is a sectional view taken along the - line in Figure 1, Figure 3 is a longitudinal sectional view showing a specific embodiment of this invention, Figure 4 is a plan view showing the arrangement of the refrigerant passages, and Figure 5 is FIG. 4 is an enlarged sectional view taken along the line -, and FIG. 6 is an explanatory diagram of the hearth structure of a conventional metallurgical furnace. 1... Hearth brick, 2... Hearth bottom outer plate, 4... H type steel (steel material), 9... T type steel (steel material), L... Refrigerant passage.

Claims (1)

[Scope of utility model registration request] A hearth outer plate with the same curvature as the hearth brick is provided on the underside of the hearth brick arranged in a concave mirror shape, and a plurality of hearth outer plates are provided on the lower surface of this hearth outer plate to receive and support this hearth outer plate. By providing steel materials and providing partition plates between these steel materials, it is possible to create a structure between the hearth bottom outer plate, the plurality of steel materials, and the partition plates, with the hearth bottom outer plate serving as the top wall and the steel members serving as the left and right side walls. A hearth structure for a metallurgical furnace, characterized in that a plurality of hearth refrigerant passages are formed with the partition plate as a lower wall.