热风炉炉衬专用耐火砖Special firebrick for hot blast
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The function of hot blast furnace lining is heat insulation and withstand high temperature load, so when determining the material and thickness of each part of the furnace lining firebrick, should be based on the temperature, load and heat insulation required by the masonry, and smoke on the masonry physical, chemical effects and other conditions.
The dome is a space connecting the combustion chamber and the regenerator. It should keep the structure stable under the action of the high-temperature air flow, and meet the requirement that the high-temperature smoke air flow enters the regenerator evenly during combustion.
The dome shape is mostly hemispherical, which can make the furnace shell free from lateral thrust. The weight of the roof is pressed on the big wall by the arch foot, so as to maintain the stability of the structure.Recently the thermal insulation protection between the upper part of the furnace and the vault has been strengthened.Since the vault was supported on the Great Wall, which was easily damaged by thermal expansion and compression, the vault was separated from the Great Wall and supported on the ring beam to form a mushroom vault.
The lower layer brick of the vault is the arch foot firebrick, which is usually reinforced with a steel ring to make the furnace shell less affected by horizontal force.The brick laying on the top of spherical furnace needs special-shaped firebrick, too many bricks, the cost of manufacturing storage inconvenience is also high, but the special-shaped firebrick type is too little, the processing amount of masonry firebrick is too large, causing construction difficulties.In the center of the arch is a specially made firebrick for the top of the stove, with a hole of 480mm for the thermocouple.
Upper 30% ~ 40% of height of refractory brick used in the high temperature, should have good creep resistance and erosion resistance, domestic use Al2O3 containing more than 65 ^ high aluminum refractory brick, abroad, the use of the containing SiO294 ~ 96% siliceous refractory brick or contain Al2O372 % ~ 76% mullite refractory brick.According to the experiment, at 0.2 MPa, 1550 ℃ and 50 h conditions, the creep rate is 0% ~ 0.5%, 0.1%?0.3%.Therefore, creep resistance is good.The firebrick used in the vault is better against thermal shock to avoid peeling and cracking.In the lower part of the refractory brick should be considered compressive strength, the general use of clay bricks and high aluminum refractory bricks.When selecting insulation materials, special attention should be paid to the hot surface temperature should not be higher than the allowed temperature.Diatomaceous earth fire bricks or light clay bricks are generally used for insulation of vaults and upper walls.Rongsheng naicai provides you with high quality refractory materials.
The large wall is the wall of the hot blast furnace furnace body, and the furnace lining includes laying firebrick layer, packing layer and insulating layer.Rongsheng naicai provides you with high quality refractory materials.It is generally made of 345mm thick firebrick.Brick joint shall be less than 2mm.Between the big wall and the furnace shell of the hot blast furnace, the contact with the furnace shell is 65mm thick diatomite fire brick insulation layer, between the insulation layer and the wall is 60~145mm thick dry slag filler layer.In order to reduce heat loss, a layer of 113mm or 230mm thick light clay brick is added outside the upper high-temperature zone refractory brick to strengthen thermal insulation.Between the two kinds of thermal insulation bricks filled with 50~90mm thick thermal insulation filler layer, or water slag 70% and asbestos 30% composition, or water slag, diatomite powder, vermiculite powder, etc..Diatomaceous earth fire brick of 113mm is used for the insulation layer below the high temperature zone. Water slag or diatomaceous earth powder of water slag is mixed for the filler layer, and vermiculite powder is also available.
The company sells long-term high alumina brick, clay brick, silica brick, zirconium corundum brick, silicon brick and so on the price is reasonable, the quality is superior.Contact number: 0086-13608670776