JPS59179691A - Coke oven - Google Patents

Abstract

PURPOSE:To reduce the cost of repair and save energy, by forming an oven top with fibre bricks having a depression on the side facing inside of the oven which is filled with a heat-insulating material. CONSTITUTION:At the top 3 of a coke oven 1 having a carbonization chamber 2 and alternately arranged heating flues, are provided loading apertures 4 connecting with the carbonization chamber 2 and flue openings 5 connecting with the heating flue, and fire bricks 6 are laid around the loading apertures to form an operating floor. The fire brick 6 has projections 7, 7 at both ends along the lengthwise direction on the side facing inside of the oven, and a depression 8 between the projections 7, 7 is filled with ceramic fiber 9. The oven top 3 of the above construction has improved strength and wear resistance, leading to reduction in repair cost. The fire brick 6 has an energy saving effect by dint of its excellent heat insulating property.

Description

[Detailed description of the invention] The present invention relates to a coke oven.

Normal kilns are mostly built indoors, but coke ovens are built outdoors and are exposed to the wind and rain, the running of work vehicles (coal charging trucks), and the charging hood during charging work. The top and bottom of the furnace top bricks are worn out and the brick joints are damaged due to factors such as the running of the furnace top cleaner after charging, impact from thrown work tools and jigs, and people walking, necessitating frequent repairs.

By the way, the top of the conventional coke oven was made of red bricks, silica bricks, tiles, etc., but these do not have sufficient insulation properties and are prone to surface peeling due to the large amount of heat dissipated during coal carbonization. Moreover, as a result, it becomes water-absorbent, which not only increases repair costs but also increases energy loss. Moreover, for example 114
Since refractory bricks with a size of about 230 mm x 65 mm were used, the moldability of the top of the furnace was poor, and there was a large change over time, resulting in high repair costs and an unavoidable increase in heat loss.

The present invention has been made in order to eliminate the above-mentioned drawbacks, and by constructing the top of the coke furnace using refractory bricks with improved heat insulation properties, it is possible to reduce the cost of repairing the top of the furnace and to save energy. The idea is to provide a furnace.

That is, the coke oven of the present invention is characterized in that the top of the oven is made of refractory bricks, the inside surface of which is formed with unevenness, and the depressions are filled with a heat insulating material.

In the present invention, the area occupied by the recess on the inside surface of the refractory brick constituting the furnace top is 30 to 8 of the area inside the furnace.
It is desirable to be in Section 5.

If this is less than 30%, the insulation effect will not be sufficient, and 85
This is because if the thickness exceeds 1, the strength will decrease and the firebrick will easily break at the boundary with the convex part.

In addition, in the present invention, the heat insulating material filled in the recesses of the firebrick is preferably made of a material with relatively low thermal conductivity, such as ceramic fiber with a thickness of 2 to 40 mm, but the thermal conductivity is about 0.2 kcal. /m・hr-℃(at 35
Other materials such as glass fiber, rock wool, heat insulating brick, etc. may be used as long as the material is below 0°C. In order to fill the four parts of the firebrick with heat insulating material, plate-like materials such as ceramic fins may be adhered using an inorganic or organic adhesive, or they may be simply compressed or fitted as is. .

Embodiments of the present invention will be described below with reference to FIGS. 1(a) and 2(b) and FIG.

In the figure, 1 is a coke oven, and in this coke oven 1, carbonization chambers 2 and heating flame ducts (flues) are alternately formed. The top 3 of the coke oven 1 has a charging port 4 connected to the inside of the carbonization chamber 2. . . . and a free hole 5, .

This refractory brick 6 has a diameter of 400 to 600 as shown in Fig. 2.
wnX 4 (having a surface dimension of 10 to 600 mm, convex portions 7.7 are formed at both ends along the longitudinal direction of the inner surface of the furnace, and ceramic is used as a heat insulating material in the concave portion 8 between these convex portions 7, 7). It has a structure in which Phino-9 is pasted and filled.

According to the coke oven 1 having the above structure, the ceramic fibers 9f and the refractory bricks 6 filled on the inner surface of the oven
Yoshi furnace top 3. , the strength, wear resistance, etc. of the furnace top 3 can be improved, and repair costs can be significantly reduced. Moreover, since the refractory bricks 6 have excellent heat insulation properties, energy saving effects can also be achieved. Furthermore, the dimensions of the refractory bricks that make up the top of the conventional coke oven are, for example, 11
0 mm x 230 Wn, but the coke oven 1 of the present invention
The refractory bricks 6 that make up the furnace top 3 have excellent insulation effects,
As a result, wear resistance etc. can be improved, so 400-6 () Oran X 400-600 t
By reducing the number of brick joints, it is possible to maintain the flatness of the furnace top, reduce the need for repairs, and improve the insulation effect 1, prevent rainwater from entering, and reduce the frequency of repairs. I can do it.

The mechanical strength of the refractory brick used in the present invention is preferably a compressive strength of 400 kg/cm'' or more.

Moreover, the refractory bricks constituting the coke oven of the present invention are
The structure is not limited to the structure shown in the figure, but may be the structure shown in FIGS. 3 and 4, for example.

The refractory brick 6' shown in FIG. 3 has four convex portions 7' all formed in parallel along the longitudinal direction of the inner surface of the furnace, and concave portions 8' between these convex portions 7'... is completely filled with ceramic fibers 9'. In addition, the refractory brick 6" shown in FIG.
· are formed, and the protrusions 8"... between these protrusions 7"...
is filled with ceramic fibers 9''...

As detailed above, according to the present invention, it is possible to provide a coke oven that can reduce repair costs and save energy.

[Brief explanation of the drawing]

FIG. 1 (,) is a plan view of a coke oven in an embodiment of the present invention, FIG. FIGS. 3 and 4 are perspective views of refractory bricks used in the furnace in other embodiments of the present invention. FIGS. 1... Coke oven, 2... Carbonization chamber, 3... Furnace top,
4...Charging port, 5...7 holes, 6.6', 6"
... Firebrick, 7, 7/, 7//... Convex part,
8.8', 8"... recess, 9. g/, g/I
・Ceramic fiber. Applicant's agent Patent attorney Takehiko Suzue Figure 1 - Figure 2 Figure 3 Figure 4

Claims (3)

[Claims] (1) A coke oven characterized in that an uneven surface is formed on the inside surface of the oven, and the oven top is made of refractory bricks with the depressions completely filled with a heat insulating material. (2) The coke oven according to claim 1, wherein the area occupied by the concave portion on the inside surface of the refractory brick constituting the furnace top is 30 to 85 times the area inside the furnace. (3) A coke oven according to claim 1 or 2, characterized in that ceramic fiber is used as the heat insulating material.