Application and Development of Refractory Lining for Hot Blast Stove
This paper provides an overview of the selection and application of refractory materials in hot blast stoves. Refractory materials are chosen based on the temperature of the hot blast in blast furnaces. External combustion hot blast stoves are commonly used, with silica bricks employed for the high-temperature sections. Some countries have also conducted transformations on internal combustion hot blast stoves to improve combustion temperature and longevity.
Submerged-arc furnace for phosphorus production
The phosphorus-making electric furnace is the heart equipment of yellow phosphorus. It must be carefully operated, standardized operation, reasonable allocation of raw material composition addition ratio, control of coke particle size, the strict construction quality of lining refractory materials, and refractory material procurement standards to To prolong the service life of the furnace lining.
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How to build rotary kiln?
The article presents the construction methods and maintenance of lining for rotary kilns. The construction methods include dry or wet masonry, ensuring concentricity and tightness between brick lining and kiln shell. In dry masonry, the use of steel plates between bricks should be minimized, while in wet masonry, brick joints should be maintained at 1-1.5mm. The shape and specifications of bricks are determined based on the diameter of different zones inside the kiln, typically in a fan shape with appropriate thickness. To improve the service life of the lining, a construction method combining prefabricated blocks and casting materials is recommended, offering simplicity and good overall integrity.
The article also addresses the maintenance and repair of the lining. Different types of kilns require specific protective measures, such as applying kiln skin and performing repairs. Kiln skin acts as a protective layer against chemical erosion and mechanical wear, while providing insulation. Repair work can be carried out through spraying materials or casting, effectively extending the lifespan of the lining.
How to prolong the life of the kiln?
To extend the lifespan of the kiln and ensure its reliable operation, effective management of the kiln is necessary. Since the construction of the kiln directly affects its later production and operation, quality control of the construction process is essential. In the quality control process, focus on materials, construction, and acceptance work to improve the construction level and quality.
Can high alumina refractory bricks be sprinkled after they leave the kiln?
High-alumina bricks are a type of refractory brick used in high-temperature applications such as furnaces, kilns, and boilers. They are made by mixing raw materials such as bauxite, chamotte, and clay, and then firing them in a kiln at high temperatures of around 1,700-1,800 degrees Celsius. This process gives the bricks their high density, strength, and resistance to […]
What are the classification and advantages of monolithic refractories?
Unshaped refractory material is a new type of refractory material that does not require firing. Its development has been rapid, with Japan, the United States, and Germany producing over one-third of the total output of refractory materials. Its usage has expanded from steel rolling industry furnaces to high-temperature kilns used in steelmaking and ironmaking, solving some critical equipment lining problems.
What are the basic requirements for refractories for coke ovens?
A Coke oven is a crucial piece of equipment for coking enterprises. It is a thermal kiln with a complex structure consisting of several parts such as a bare roof, slight flue, regenerator, ramp, combustion chamber, furnace area, and others. The furnace age is typically between 30 to 35 years. The durability of the coke oven depends on several factors such as the quality of the furnace body masonry, the design of the furnace body structure, and the performance of the refractory material used. During operation, most of the masonry is challenging to repair while hot. Hence, it is crucial to use refractory materials that can adapt to the requirements of the coking production process and are long-lasting.
What are the characteristics and requirements of refractory prefabricated parts for cement kiln?
With the continuous update and improvement of cement production technology, the single cement kiln production line is developing towards a larger scale. The new dry cement production technology has the characteristics of high kiln temperature, fast kiln speed, complex system structure, and severe erosion of volatile components such as alkalis, which has posed more demanding requirements for refractory materials used in cement kilns.
