JPH02302589A - Processing method for refractory material - Google Patents

Abstract

PURPOSE:To prevent thermal deformation of refractory material supporting member and to prolong the life of a whole refractory structure by employing a hollow refractory material supporting member, and communicating a space of the hollow part with the exterior of a high temperature device. CONSTITUTION:In, for example, a cement clinker baking facility, a partition 11 for regulating the flowing resistance of gas is provided toward an oblique face 9 perpendicularly to a gas flow in a discharge gas conduit 2, and the section of the conduit is reduced. The partition 11 is formed in a refractory structure made of a framework 12 of a refractory material supporting member and a castable refractory material 13, a frame for forming a profile is installed at the periphery of the framework in which a steel tube 14 and a Y-shaped piton 15 made of a stainless steel material are aligned and welded, castable refractory material is fed and cured. The steel tube is formed in a hollow state, and its both ends are opened with the atmosphere through a steel plate 16 of the shell of a gas conduit 2. While a kiln is operated, the framework becomes high temperature, but since both the ends of the steel tube are opened with the atmosphere, the air passes through the tube from a route of an arrow 17 to cool the steel tube, and is discharged from the tube via the route of an arrow 18.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for constructing refractories in high-temperature equipment such as cement tarinka firing equipment such as kilns and suspension break heaters, and heating furnaces that perform heating operations at high temperatures. The purpose is to improve the structure of a refractory support member and extend its life, and by extension the life of the entire refractory structure.

[Prior art] Refractories are installed on the inner walls and other structures of high-temperature equipment such as kilns to create a fireproof structure, but this consists of a refractory and a refractory support member, and its lifespan depends on the refractory and other structures. It depends on both the refractory support member.

The ceiling surface of the cement clinker cooler is constructed by fixing brick hanging hardware to the ceiling and fitting the bricks into the hanging hardware. If a single brick is partially damaged but cannot be replaced, the brick hanging hardware may be exposed to higher temperatures than normal, resulting in thermal deformation, destroying the hanging bricks and causing bricks to fall. There is.

Bricks, castable refractories, and other unstructured refractories are used for the inner walls of the cyclones and gas pipes that make up the suspension breaker of cement firing equipment, as well as other structures. For example, birken (studs) are lined up and welded to H-beam steel to form a refractory support member. A formwork is placed, and castable refractories are poured and hardened to create a fireproof structure. In this case, the H-shaped steel of the refractory support member, which is the framework, is thermally deformed due to the high temperature, destroying the castable refractory, causing cracks, and parts of the refractory supporting member falling off, resulting in the damage to the fireproof structure as a whole. It may shorten your lifespan.

[Problems to be Solved by the Invention] An object of the present invention is to prevent thermal deformation of a refractory support member, which is a framework, and to extend the life of the refractory support member, and thus the life of the entire fireproof structure.

[Means for Solving the Problems] The refractory construction method of the present invention is a method of arranging a refractory support member inside a high-temperature device and constructing a refractory around the refractory support member. It is characterized in that a support member is used and a hollow space thereof communicates with the outside of the high temperature device.

Further, the hollow refractory support member is a steel pipe.

[Example] Examples will be explained with reference to the drawings.

FIG. 1 is a system diagram of cement talin firing equipment.

1 is a rotary kiln, and the kiln exhaust gas passes through a gas conduit 4 and enters a cyclone 3a, and then a cyclone 3b above it.
3c, 3d, passing through the gas conduit 6 and being attracted by the fan 7. 5 is a calcining furnace, and the raw materials calcined here and the exhaust gas pass through the gas pipe 3 and join with the kiln exhaust gas, and from 4 to the cyclone 3a.
to go into. 4a, 4b, and 4c are gas conduits.

The cement raw material is supplied from the raw material supply chute 8d, and reaches the cyclones 3d, 3c, and 3b, and the calcining furnace 5. 8c, 8
b, 8a, 8 are raw material supply chutes.

The preheated and calcined raw material is supplied from the cyclone 3a to the rotary kiln 1 via a raw material supply chute 8 and an inclined surface 9 of the supply housing.

A portion 10 surrounded by a chain line in the figure shows the periphery of a partition 11 provided within the gas conduit 2. The partition is connected to the gas conduit 2 as shown in Figures 2 and 3 in detail.
It is a flat plate-like structure installed to reduce the cross-sectional area of the

Its role is to increase the ventilation resistance of the kiln exhaust gas and balance the amounts of the two induced gases when a common fan is used to induce the kiln exhaust gas and the calciner exhaust gas. Since the partition is exposed to high temperatures of about 1150° C., it has a fireproof structure made of a refractory material.

An embodiment in which the present invention is applied to a partition will be described with reference to FIGS. 2 and 3, together with its operation.

FIG. 2 is a longitudinal sectional view of a portion 10 surrounded by a chain line around the partition 11 in FIG. FIG. 3 is a view of the partition 11 taken along the line A--A in FIG.

A partition 11 for adjusting gas flow resistance is provided inside the exhaust gas conduit 2 facing the inclined surface 9 at right angles to the gas flow to reduce the conduit cross section.

The partition has a fireproof structure consisting of a framework 12 that is a refractory support member and a castable refractory 13. The frame is made by welding a steel pipe 14 and a Y-shaped barken 15 made of stainless steel side by side in place of the conventional H-shaped steel. Partitions are created by installing a formwork around the frame to define the outside shape, then pouring castable refractories and hardening them.

The frame of the present invention consists of one or more steel pipes and a Y-shaped barken welded to the steel pipes.

The steel pipe is of course hollow, and both ends thereof are opened to the outside air by penetrating the steel plate 16 that is the outer shell of the gas conduit. The steel pipes in Figure 3 are 3 horizontally and 6 vertically, and the intersections of the m vertical and horizontal pipes are not closed but hollow and open.

During kiln operation, the framework also becomes hot, but since both ends of the steel pipe are open to the atmosphere, air passes through the interior of the steel pipe along the path shown by arrow 17, cools the steel pipe, and is discharged from the steel pipe along the path shown by arrow 18. This airflow occurs constantly and constantly cools the steel pipe.

The dimensions of the example are illustrated.

Cross section of gas conduit 2 4,700 x 4.150 mm Partition 3,700 x 250 x 4,150 mm Steel pipe Inner diameter 165 mm 6 vertical and 3 horizontal pipes No damage after 4,300 hours of continuous operation.

The hollow refractory support member of the present invention is not limited to a steel pipe, but may be a hollow member with a square cross section. The effects of the present invention can be achieved no matter what shape the member is made hollow. Birken is also Y
Not limited to type. Even if there is no birken, a hollow tube woven into a wire mesh may be used.

The locations to which the present invention is applied are not limited to the above-mentioned partitions, but can also be applied to other fireproof structures.

[Effects] With the above configuration, the present invention constantly cools the frame of a fireproof structure to prevent its thermal deformation, and prevents cracks, deformation, and destruction of the refractory due to thermal deformation of the frame, thereby extending the life of the entire fireproof structure. This contributes to long-term operation of high-temperature equipment.

[Brief explanation of the drawing]

1, 2 and 3 show embodiments of the invention. 1st
The figure is a system diagram of cement firing equipment such as a rotary kiln and a partition according to an embodiment of the present invention. Figure 2 shows the first
FIG. 3 is a vertical cross-sectional view of the periphery of the partition shown in the figure. FIG. 3 is a view of the partition taken along the line A--A in FIG. In the figure, 11 is the version, 12 is the skeleton, and 13
14 is a castable refractory, 14 is a steel pipe, 15 is a Y-shaped barken, 16 is an outer shell steel plate of a gas pipe, and 17 and 18 are arrows indicating the direction of ventilation inside the steel pipe. Figure 1

Claims (2)

[Claims] (1) In a method of arranging a refractory support member inside a high-temperature device and constructing a refractory around the refractory support member,
A refractory construction method characterized in that a hollow refractory support member is used and the hollow space communicates with the outside of the high-temperature device. (2) A refractory construction method characterized in that the hollow refractory support member according to claim (1) is a steel pipe.