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Restoring method for chute of dry quenching furnace

A repair method and chute area technology, applied in the field of coking, can solve the problems of uneven furnace temperature, insufficient thermal shock stability, uneven force of chute support columns, etc., and achieve improved structural stability, good volume stability, The effect of good thermal shock stability

Active Publication Date: 2012-10-31
HEBEI IRON AND STEEL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, the temperature in this area frequently fluctuates during operation, and the long-term use temperature is repeatedly cycled at 200-1000°C. Under the intense erosion of cooling airflow and coke dust particles, as well as the quality defects of the original bricks, insufficient thermal shock stability and other factors, it is huge. The thermal shock of the thermal shock leads to the peeling and damage of the bricks; on the other hand, the uneven settlement of the CDQ coke chamber as a whole and the center and level errors during the construction process bring uneven force on the support column of the ramp, and uneven coke discharge causes cooling air. Uneven distribution, uneven furnace temperature along the direction of the furnace circumference of the refractory materials in the ring gas channel, aggravated damage to local support columns, easy damage to masonry and extremely difficult to replace after damage
At present, the conventional method of repairing the support column is bricklaying and mosaic repairing. This method requires a large amount of work, poor integrity of the masonry, time-consuming and material-consuming, and high cost.
After using for a period of time, the same phenomenon of peeling off bricks will appear

Method used

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  • Restoring method for chute of dry quenching furnace
  • Restoring method for chute of dry quenching furnace
  • Restoring method for chute of dry quenching furnace

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1: Weigh aggregate 6, matrix 4, and stainless steel heat-resistant fiber 0.3 by weight unit. The aggregate part is composed of the following raw materials by weight unit: fused corundum 45, high-purity low-iron synthetic mullite 20, super silicon carbide 15, and the matrix part is composed of the following raw materials by weight unit: high-purity silicon micropowder 4, Silicon carbide superfine powder 6, high-purity aluminate 5, active α-Al 2 o 3 10.

Embodiment 2

[0021] Example 2: Weigh aggregate 7, matrix 3, and stainless steel heat-resistant fiber 0.1 by weight unit. The aggregate part is composed of the following raw materials by weight unit: fused corundum 60, high-purity low-iron synthetic mullite 10, super silicon carbide 8, and the matrix part is composed of the following raw materials by weight unit: high-purity silicon micropowder 8, Silicon carbide superfine powder 2, high-purity aluminate 3, active α-Al 2 o 3 6.

Embodiment 3

[0022] Embodiment 3: Weigh aggregate 6.5, matrix 3.5, stainless steel heat-resistant fiber 0.2 by weight unit. The aggregate part is composed of the following raw materials by weight unit: fused corundum 55, high-purity low-iron synthetic mullite 15, super silicon carbide 10, the matrix part is composed of the following raw materials by weight unit: high-purity silicon micropowder 6, Silicon carbide superfine powder 5, high-purity aluminate 4, active α-Al 2 o 3 8.

[0023] In order to ensure the good construction performance of the self-flowing castable, when mixing, add 5.5% of water, add 3-4.5% of high-efficiency water reducer, and the fluidity reaches 180%. The specific physical and chemical indicators of the self-flowing repair compound are shown in Table 1-1.

[0024] Table 1-1 Mullite-silicon carbide castable quality inspection results

[0025]

[0026] CDQ furnace schematic diagram as figure 1 As shown, when repairing the support column in ramp r...

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Abstract

The invention relates to a method for restoring a declination flue area of a dry quenching stove, which belongs to the technical field of carbonization, and is used to solve the problem of a declination flue area of a dry quenching stove which is easy to be damaged and is difficult to restore. Repatching material which is utilized is mullite-carbofrax gravity flow casting material, wherein the weight proposition of the gravity flow casting material is that aggregate 6-7, substrate 3-4, rustless steel thermally resistant fibre 0.1-0.3, wherein aggregate is proportioned according to the following weight unit, electro-melting corundum 45-60, high-purity low-iron synthesis mullite 10-20 and superfine carbofrax 8-15, substrate is formed by the following materials according to weight unit, high purity silica powder 4-8, silicon carbide ultrafine powder 2-6, high-purity aluminate 3-5, active alpha-Al2O36-10. Fire resistive material which is chosen covers the shortcomings that medium temperature intensity in normal refractory material is lowered, methods such as utilizing heat resisting steel bar to be reinforced bar, processing gearing structure of residual liner surface, and adopting dies to surround bracing columns in three faces and the like are adopted in construction method, and repairing liner and residual liner which are casted are firmly and mutually geared together, and stability of integral structure is further improved.

Description

technical field [0001] The invention relates to a process method for repairing a chute area of ​​a CDQ furnace, belonging to the technical field of coking. Background technique [0002] CDQ is a coke quenching method that uses inert gas to cool red coke, and CDQ is carried out in a CDQ furnace. In the CDQ process, red coke is loaded from the top of the CDQ furnace, and the low-temperature inert gas is blown into the red coke layer in the cooling section of the CDQ furnace by a circulating fan to absorb the sensible heat of the red coke, and the cooled coke is discharged from the bottom of the CDQ furnace. discharge. The high-temperature inert gas coming out of the annular flue of the CDQ furnace through the chute area flows through the CDQ boiler for heat exchange. The boiler generates steam, and the cooled inert gas is re-blown into the CDQ furnace by the circulating fan. The bricks in the ramp area cantilever layer by layer to support the load of the upper masonry and ch...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10B29/00C10B39/02
Inventor 赵丽树张宝会刘广礼张玉林边浩褚和常继祥高连红何小锴张健
Owner HEBEI IRON AND STEEL