- Time:Jan 13, 2023
Rotary kilns are steel cylinders lined with refractory bricks or castables. Rotary kilns for the cement industry are the most used for calcining products. Rotary kilns for metals such as aluminum, copper, zinc, tin, nickel, tungsten and chromium are also used one after another. There are also rotary kilns for calcined lime and calcined magnesium sand, alumina-magnesia spinel, bauxite, hard clay, rare earths, ceramic pellets, incineration waste and other calcined materials with different firing temperatures, the highest temperature of 2000 ℃, the lowest at about 1000 ℃.
The working principle of rotary kiln is the same, all are rotating kiln, kiln tail, kiln head, pre-heat zone, firing belt, cooling belt, due to the different rolling impact, friction and erosion of the materials burned, the refractory material chosen for the lining is also different.
Cement kiln lining selection of magnesium aluminum spinel brick, magnesium iron aluminum spinel brick magnesium material refractory bricks; lime, dolomite kiln lining selection of phosphate bricks, phosphate composite bricks, magnesium aluminum spinel refractory bricks, but also the choice of pouring material and prefabricated refractory brick combination way, but also all with pouring material pouring way to do lining; pellet rotary kiln selection of high alumina bricks or low porosity refractory bricks, but also with pouring material to do lining, but also can use prefabricated refractory bricks and pouring material combination lining, this way is generally used a few kilns before using this way, the new kiln more choice of refractory bricks, because this is convenient to replace the lining.
Zinc oxide kiln erosion situation is serious, frequent replacement, more use of silica corundum bricks, that is, phosphate added corundum and silicon carbide composite bricks and clay refractory bricks, a few manufacturers choose explosion-proof fiber wear-resistant castables and prefabricated bricks, fixed with anchor parts, the use of good results in the high temperature zone.
Alumina rotary kiln or sulphuric alkali rotary use anti-flaking high alumina bricks, the use of better results; burning petroleum coke, prefabricated composite bricks with anchor nails and castings combined masonry lining effect can also be quite. Burning waste kiln lining on the refractory material erosion serious, choose chrome corundum brick or corundum mullite refractory brick. The castable masonry is either chrome corundum castable or corundum mullite castable for lining.
Laterite nickel ore kiln, rotary kiln direct reduction production of ferronickel process, then the use of microporous magnesium aluminum zirconium brick refractory bricks, the use of obvious results.
ZHENJIN REFRACTORIES is dedicated to the research and development, technical solution design, construction and supporting products of refractories for cement, lime, non-ferrous, steel, glass and chemical industries, etc. It is a one-stop turnkey service provider integrating production, marketing, research and export of high-temperature kiln solutions. The service chain runs through the whole project life cycle, including preliminary consultation, design, R&D, construction and safety production, etc. Through the optimal combination of various grades of products to meet different process requirements, we can effectively create value for our customers.
