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Zhengzhou, the four seasons of fire ventilation wall refractory production methods

Number of visits: Date:7/8/2016

  The utility model belongs to the pelletizing shaft furnace body part of the internal structure, used to reduce the airflow in furnace resistance, improve the material layer permeability.

  Ventilation is the pelletizing shaft furnace wall to reduce airflow resistance, improve material layer permeability, and adopt measures to the "short circuit" in the furnace. It not only reduce the cooling air through the material layer resistance, increase the material drop speed, raising the yield of pellets, and increase the cooling air volume, improve the cooling effect of the pellets. Both increase the airflow drying bed, reduce the burst of the pellet, functions, to improve the quality of pellets and eliminates the center of the shaft furnace of dead stock column and furnace stacking lump. This kind of ventilation wall structure design is reasonable, running reliable, can be convenient for construction and maintenance, to improve the yield, quality and utilization ratio of pelletizing shaft furnace relationship is very large. But since the Chinese first invented the use of ventilation wall, the wind guide wall is due to the unreasonable structural design, make its short service life, construction and maintenance difficulties, adaptability to small operation, especially the structural stability is poor, often caused the collapse. This kind of ventilation wall was originally a lug water beam six seamless steel tube making, in its upper common clay brick masonry, and leave the square vent, on both sides of the set in the shaft furnace in reserve a slot in the side wall. Due to the lug water beam exposed; At high temperature in the furnace air flow and wall under the action of gravity, bent phenomenon, make the ventilation wall subsidence, damage to produce crack and overall stability. This kind of ventilation wall under the action of pellet fluidization, heavily damaged in the lower part of the clay brick, local vent off brick phenomenon in a way, make the ventilation wall brick collapse caused by a fall off the bottom. The ventilation effect without bracket water beam fixed on the wall, form the free end, poor ability to withstand the lateral pressure, once appear, partial material during the process of the operation will be its collapse. The wind guide wall is made from clay brick masonry of square vent through the hollow wall, low strength, poor stability, generally 2-3 months after blowing in production is down. Later after some local improvement, beam diameter increased, the water quantity also increased from six to eight root, high aluminum refractory brick, the stability is increased, but life also only six months or so. In order to improve the stability, and the wind guide wall increased from 600 mm to 600 mm, the width of refractory brick build by laying bricks or stones and had some improvement, make the life of a year or so, but it will reduce the effective volume of the shaft furnace, reduce the production ability. For the shaft furnace can not take such measures, that have been put into operation in the new expansion of the shaft furnace and by increasing the furnace capacity will also increase construction investment. The wind guide wall construction cycle is long, which requires a masonry and oven two stages to complete, the repair and must eliminate all ventilation wall masonry, masonry again, general repair need 3 to 5 days at a time, lower the shaft furnace utilization rate greatly. One-time repair cost nearly fifty thousand yuan.

  In order to make this kind of ventilation wall, cross section in the unit of the hole is the largest natural conditions, improving the structure stability, prolong the life span, shorten the construction period, lower construction and repair the investment cost, improve the utilization rate of pelletizing shaft furnace, increase the yield of pellets. This practical new type of ventilation wall bracket beam from top to bottom water points and nine layers layout; Each layer parallel set two seamless steel tube bracket water beam; Ventilation wall on both sides of the wall is installed on the adjacent two root lug water beam combination of brick; On both sides of the wall bracket lateral force between the water beam supported by a combination of panel brick; Ventilation combined brick wall installation does not need to masonry, need not oven; Lug water beam in composite brick, not bare; The combination of each layer brick can separate installation or replacement. So that the utility model ventilation wall has the advantages of stable structure, high efficiency, easy to install, easy to repair, operations, strong adaptability, the effect of the service life of up to two years.

  This utility model combined with the appended drawings below for further instructions

  The appended drawings show

  Figure 1 is the utility model of the main profile tutu 2 is attached

  In figure 1 A - A profile of the working principle of the utility model for combustion chamber, on either side of the shaft furnace combustion exhaust gas through the nozzle in spray charging, separated by A wind guide wall, respectively, up and down the burden of heat, to heating furnace charge. Shaft furnace bottom of the cooling air entering the furnace top sports, good roast pellets to cool. At the same time cooling air is heated, and about 80% of short circuit through the ventilation wall (not the stock column) directly sent to the oven drying bed, finally, in under the action of dust removal fan, the waste gas discharged into the atmosphere.

  Lug water beam, 1 of this practical new type USES seamless steel tube nine layers eighteen root. Its role is largely rest on each group of the water beam combination of brick, inherit the burden of the lateral pressure and the gravity of the combination brick, is a wind guide wall frame. It at both ends of the bearing on the wall in the shaft furnace end, and the furnace body welding, pipe water to cool the stress point of combination brick, improves the combination of high temperature strength brick, because of the water beam positioning effect, can effectively prevent the combined bricks fall off. Tiering, on to the vertical bending of the water beam binding, total water beam increases, increases the bending moment, greatly ease the water beam bending deformation problem, even if it is bent, also must be bent down at the same time, its water water beam and beam spacing is constant, combined bricks will not fall off.

  The utility model combination brick 2, two points is a wind guide wall support brick. Vertical placed between two water beam, the effect is a supporting fluctuation two adjacent water beam, bears the burden of the lateral pressure and the heat flow scouring, its characteristic is up and down to half park, card on between the two water beam directly, put the burden of the lateral pressure transfer water beam directly, not easy to fall. It wrapped water beam into it, reduces the heat load of water beams, avoid the water airflow and beam heating furnace charge directly wash and wear and tear, can prolong the service life of the water beam.

  The utility model combination brick 3, is the ventilation hood brick wall department. This is the wind guide wall outlet, and its quality is bigger, can effectively export through the hot air ventilation wall, but not easy to fall, two outlet Angle is 100 °, make the export of hot air used for drying bed more effectively.

  The utility model 4 combination brick, brick is a wind guide wall side head. Its main function is the combination of brick 2, vertical in a certain position can't continue to stand between the two horizontal beam put the composite brick, so as to achieve the purpose of the head.

  5 the utility model brick, brick is a wind guide wall supported at four o 'clock. It on adjacent beams and four pillars of water, the main effect is to bear burden by combining brick 2 transfer water beam lateral pressure, the lateral pressure between the two root water beam support level, the level of mutual support between two water beam, which can effectively prevent water lateral bending deformation of beam, because it can guide the wind wall separated into various channel, also plays a make ventilation wall air evenly distributed.

  To sum up, the utility model wind guide wall structure stability, high efficiency, easy to install, easy to repair, operations, strong adaptability and long life. With 8 m2 shaft furnace ventilation wall, for example, in the water beam position set up layout beam, every 500 mm set up two root, a total of nine layers 18 root. In shaft furnace QiYou groove end wall brick, brick water beam through the pass, positioning after installation with high temperature furnace supplements good seal end wall, good water beam and furnace body welding, the composite brick 2 put in between two root water beam inclined shaft, every 900 4 mm with a combination of brick, after loading the five groups, horizontal combination brick four, eight, combination of the top mounted brick 3. Using the wind guide wall can make life, 4 times, up to two years, three times less repair, direct cost saving of nearly 150000 yuan, but also greatly improve the utilization rate of pelletizing shaft furnace and bring huge economic benefits to the production of shaft furnace, in any newly built, expanded or rebuilt pelletizing shaft furnace can be used.

  Claim 1. The water is composed of a bracket beam, combination of brick is used in pelletizing shaft furnace inlet wall, features of the utility model is said the wind guide wall bracket water beam is divided into nine layers to decorate, the combination between the water beam installation brick.

  2. According to the requirements of power 1 ventilation wall, its features are described in the ventilation wall each layer parallel set two seamless steel tube beam bracket of water.

  3. According to the requirements of power 2 mentioned ventilation wall, it has the following characteristics is the ventilation wall on either side of the wall is installed on the adjacent upper and lower two lug water beam combination of brick.

  4. According to the ventilation wall right request 3 stated, whose character is described in the guide of the wind wall on both sides of the wall bracket lateral force between the water beam is supported by the combination of panel brick.

  5. According to the ventilation wall right request 4 stated, whose character is to guide the wind combined brick wall installation does not need to masonry, don't need a oven.

  6. According to power the wind guide wall of right-claiming 5, its characteristic is that the wind guide wall of the water beam in combination inside the brick, not naked.

  7. According to the power of right-claiming 6 ventilation wall, its characteristic is that the wind guide wall brick combination of each layer can be installed separately or replacement.

  Patent a ball the ventilation shaft furnace wall, for reducing furnace airflow resistance, improve the material layer permeability. The utility model of the bracket beam is divided into nine water layer is decorated, each layer parallel seamless steel tube beam bracket of water, two sides wall body composed of combined bricks. On both sides of the wall of the lateral force is supported by combined bricks; Combined brick installation, do not need to masonry, do not need to oven; Lug water beam package within the combination of brick, not bare; The combination of each layer brick can separate installation or replacement. So the stable structure, high efficiency, easy to install, easy to repair, operations, strong adaptability and long life. Building, expanding or rebuilding the pelletizing shaft furnace can be used.

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