Advantages:

First, the use of all-fiber furnace-like structure, with excellent energy-saving performance, than the same specifications of the brick resistance furnace energy-saving 30%, warming speed increased by 1 times;

Second, the body of the furnace is lightweight through the workshop crane mechanism can be easily moved away from the furnace body, revealing the platform for loading and unloading materials.

Third, the use of the top traveling crane to move away from the upper hood body, easy maintenance and repair of equipment to improve the life of the furnace.

Fourth, the hooded furnace can be used alternately with multiple furnace bases in one hood to improve productivity and save investment.

Shroud annealing furnace annealing process

A. Determination of the heating rate of steel heating rate is mainly determined by the size of the thermal conductivity of steel. Carbon content and alloy content in steel have a greater impact on heat conduction. If their content is high, the coefficient of thermal conductivity is small, the heating rate should be appropriately slower to avoid excessive temperature difference between the inside and outside of the organization and performance of the uneven. From room temperature to 400 ℃, the heating rate is generally unlimited. According to the principle of the crystallization process, strip steel from room temperature to 400 ℃, strip steel internal organization without significant changes in the rolling process was elongated grains have just been restored, has not yet formed the recrystallization, so the faster the heating speed of steel in this interval, the better. Strip steel is heated from 400 ℃ to the holding temperature, the heating speed of the strip steel properties and surface quality have a considerable impact. General provisions of the heating rate of 30 ~ 50 ℃ / h is appropriate, strip steel from 400 ℃ heating to the holding temperature of 723 ℃ during the following period, it is the formation of recrystallization stage, and therefore the heating rate in this temperature range should be controlled.

B. Holding temperature and holding time to determine the recrystallization temperature of steel is not a fixed temperature, it is related to the internal organization of the strip, the actual production of the recrystallization temperature is in the range of 570 ~ 720 ℃ according to the product selection. Holding temperature and holding time is mainly based on product standards, technical conditions and steel type and thickness of strip steel to determine. Insulation time, insulation temperature is also related to the volume weight, strip thickness, volume weight, thick steel plate, the insulation temperature is high, insulation time should be long. Easy to produce interlayer bonding defects in steel and thin specifications of the strip, insulation temperature can be appropriately low, insulation time can be shorter.

C. bright annealing to make the strip without decarburization, no oxidation shall be bright annealing. Annealed steel coil to prevent oxidation of the key issue is to make the pressure in the protective cover to meet the process requirements. In addition, but also to seriously engage in cold blowing and hot blowing. Cold blowing and hot blowing is the purpose of using protective gases to drive away the air in the cover and the steel rolls brought into the oil and moisture. The role of hot blowing is in addition to the residual gas in the cover to further drive out in addition, more importantly, the plate rolls to bring the emulsion produced by the oil smoke, water vapor and other harmful substances all drive away blowing, to avoid staining the surface of the steel plate to reduce the surface quality of the steel plate.