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CCEWOOL Views--Choice of refractories in different parts of coke furnace

Categories: NewsStars: 3Stars Visit: - Release time: 2016-04-20 16:00:00
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     Coke furnace is heating equipment which distillates coal to obtain coke and chemical products, composed of Coking chamber, combustion chamber,etc.

     Coking chamber used refractories. Work of coking chamber is periodic. The furnace wall surface temperature dropped to about 600 degrees when loading coal,then coke oven wall surface temperature increased to 1000 degrees or 1100 degrees in the late coking. Thus, the wall and bottom use silica bricks. while due to sudden temperature changes from 1000 degrees down to 500 degrees below when open the door, which is more than the volume of silica brick’s stable temperature limit (573C ), so the stove should use products with good thermal shock resistance. Before, the most common used is clay brick, but now it tends to choose high-alumina brick, sillimanite and andalusite brick.

     Combustion chamber used refractories. The carbonization chamber and the combustion chamber use the furnace wall in common, so the brick is the same as carbonization chamber.

     Roof used refractories. Due to temperature fluctuates largely around the roof coal loading hole, so it is built with clay brick.

     Chute used refractories. The chute connected the combustion chamber and the regenerative chamber, so it requires stable brick structure.

     Small flue used refractories. Clay bricks is used in flue liner.

     Overall, the world’s coke oven used refractories is silica brick, requiring precise dimensions and having a sufficiently high bulk density, thermal conductivity, high-temperature creep resistance and high temperature strength.

     CCEWOOL® CCEFIRE series chamotte brick is an important kind of si-al refractory product, using chamotte as main material and combine with refractory clay, its Al2O3 content is usually range from 30% to 48%.

     1. precise size, tolerance would be controlled within +1mm, which is easy for install.

     2. compared with same degree fire brick, its porosity is lower and the compressive strength is 20% higher.

     3. uniform color, fewer black spot, low Fe content, 20% longer service life.

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Keywords in the article: Coke furnace

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