JPS6018710B2 - How to press filler into the back of coke oven backstay protection plate - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for uniformly transmitting the vertical force of the furnace body to the furnace bricks by press-fitting a filler into the gap between the coke oven wall and the protective plate of the backstay hair. .

The body of a coke oven is constructed of bricks, so backstays are arranged vertically at predetermined intervals along the end wall of the oven, and tie rods are passed through the top and bottom of the opposing backstays.
The furnace body is tightened at a predetermined pressure via a spring.

The tightening force of the backstay is transmitted to the furnace bricks through destaso pieces and protection plates that are arranged at predetermined intervals in the vertical direction behind the backstay, so that the furnace body is mounted vertically.

However, the combustion chamber of a coke oven is 1,300 to 140
Because the backstay is only tightened at two tie rods at the top and bottom, it curves over time, and the protective plate also curves accordingly, creating a gap between the protective plate and the furnace bricks. As a result, the furnace wall tightening force at the vertically intermediate portion of the backstay is no longer transmitted to the furnace bricks.

Moreover, on top of the coke oven, a coal-loading car weighing more than 10 liters of carbon moves back and forth dozens of times to over 100 times a day, and the effects of vibrations and other factors combine to cause damage to the vicinity of the kiln mouth of the coking chamber. Vertical cracks may develop in bulkhead bricks, and if these cracks become large, the bulkhead bricks must be replaced or the operation of the carbonization chamber must be discontinued. Normally, the space between the protective plate and the furnace body bricks is filled by pouring mortan solution into the gap between the protective plate and the furnace body bricks from the top of the furnace, when the bricklaying of the coke oven is almost completed and the furnace body has finished drying. However, since the bricks were then laid on top of the furnace, it was impossible to fill the gap again even if a gap occurred after the start of operation. An object of the present invention is to provide a method of press-fitting a filler into the gap between a protection plate and the furnace body bricks even in an existing coke oven in operation, and uniformly transmitting the furnace body clamping force to the furnace body bricks. It's about doing.

That is, the present invention provides a method of press-fitting a plurality of fillers that reach the hairs of the protective plate, which are perforated at predetermined intervals in the vertical direction of the protective plate, where the furnace body clamping force caused by the curvature of the coke oven backstay and the protective plate is not uniformly transmitted. A method for press-fitting a filler into the back of a coke oven backstay protection plate, characterized in that the filler is press-fitted through a hole to uniformly transmit the furnace body clamping force to the furnace bricks, the method comprising: By drilling filler press-in holes at predetermined intervals in the vertical direction, the filler can be injected over the entire gap between the protection plate and the furnace body brick, and the vertical loading force of the backstay can be reduced to the furnace body brick. can be transmitted uniformly through the protective plate.

Furthermore, it can be easily implemented in an existing coke oven that is in operation. Next, details of the present invention will be explained with reference to drawings showing an example of implementation.

1 and 2, 1 is a coke oven, 2 is a back stay for tightening the furnace body of the coke oven 1, 3 is a carbonization chamber, 4 is a frame sheet attached to the kiln mouth of each carbonization chamber 3, and 5 8 is a protection plate to which the core force of the backstay 2 is transmitted through the stand piece 6 and presses the furnace bricks 7; 8 is a heat insulating castable filled in the inner surface of the protection plate 5; 9 is a working deck of the coke oven 1. It is.

Reference numeral 11 denotes filler press-fit holes that pass through the protection plate 5 and the heat insulating caster pulls 8, and are arranged in a staggered manner on both sides of the backstay 2 at predetermined intervals.

12 is a short tube screwed into the press-fit hole 11 of the protection plate 5, and a valve 13 is connected thereto.

Note that 14 is a gap created between the protection plate 5 and the furnace brick 7. Therefore, when filling the gap 14 between the protection plate 5 and the furnace brick 7 with a filler, a short pipe 12 and a valve 13 are attached to each press-fit hole 11 drilled on both sides of the backstay 2.
Then, the protective plate 5. The carbonization chamber 3 on both sides of is used as an empty kiln,
The gap A between the protective plate 5 of both carbonization chambers 3 and the furnace brick 7 is filled with mortar. Next, the valve 13 attached to the short pipe 12 at the lowest stage of the press-in hole 11 is connected to the discharge side of a mortar press-in machine (not shown) with a pressure-resistant hose 21, and all other valves 13 are opened. Then, the mortar press-in machine is driven to start press-fitting mortar into the gap 14 through the pressure-resistant hose 21, valve 13, short pipe 12, and press-fit hole 11.

In this case, the furnace lids of the carbonization chambers 3 on both sides are opened, and the leakage of mortar into the carbonization chamber 3 and the leakage of mortar into the combustion chamber through the flue holes of the end flues is monitored. If mortar leaks into the carbonization chambers 3 on both sides or the combustion chamber, if mortar blows out from the upper valve 13, or if the press-in pressure increases, the mortar press-in machine is stopped to stop press-fitting mortar, and the valve 13 is closed. Remove the pressure-resistant hose 21, then connect the pressure-resistant hose 21 to the second valve 13 from the bottom, press-fit mortar using the above procedure, and then repeat the press-fitting of mortar sequentially from the bottom in the same manner to press-fit mortar into the gap 14. .

Therefore, in the gap 14 between the protection plate 5 and the furnace brick 7,
Since the mortar is press-fitted sequentially from the bottom, the entire gap 14 is sufficiently filled with mortar, so that the tightening force of the back stay 2 is applied uniformly in the vertical direction via the distance piece 6 and the protection plate 5 to the furnace bricks. 7.

In addition, each short tube 12 connected to the press-fit hole 11, the valve 13,
It can be used repeatedly by removing it after the mortar hardens.

In addition to mortar, a mixture of cinnabar sand and a small amount (approximately 10%) of sodium metasilicate may be used as the filler.

As described above, the present invention involves drilling a plurality of filler press-fit holes reaching the back of the protection plate at predetermined intervals in the vertical direction of the protection plate,
The top filler is press-fitted from the lower part of the press-in hole, and the furnace body clamping force is uniformly transmitted to the furnace body bricks, so it can be easily applied to existing coke ovens, and the protrusion of the furnace body bricks is prevented. , is useful as a measure to prevent cracks in partition wall bricks near the carbonization chamber kiln entrance.

[Brief explanation of the drawing]

The figure is an explanatory diagram for explaining an example of implementation of the present invention.
The figure is an overall front view, and FIG. 2 is a sectional view for explaining the rhombus. 1... Coke oven, 2... Backstay, 3... Carbonization chamber, 4... Frame sheet, 5... Protective plate, 6...
... Distance piece, 7 ... Furnace brick, 8
...Insulated castable, 11 ... Press-fit hole, 12 ... Short pipe, 13 ... Valve,
14... Gap, 21... Pressure resistant hose. Figure 1 Figure 2

Claims (1)

[Claims] 1. The clamping force of the furnace body caused by the curvature of the coke oven backstay and the protection plate is not transmitted uniformly through a plurality of filler press-fit holes drilled at predetermined intervals in the vertical direction of the protection plate and reaching the back of the protection plate. A method for press-fitting a filler into the back of a coke oven backstay protection plate, characterized by press-fitting the filler into the back of a coke oven backstay protection plate, thereby uniformly transmitting the tightening force of the furnace body to the furnace bricks.