The collected dust is continuously discharged from the bag filter hopper through an electric rotary air lock valve. Refractory material lining The refractory lining in a shaft kiln includes the use of refractories in different areas and their design. The preheated area is lined with clay bricks and the back is made of lightweight clay bricks and insulation boards. Magnesium/magnesium spinel bricks are used for lining in the calcination zone, and lightweight clay bricks and insulation boards are used on the back. Lining clay bricks in the cooling zone. Special magnesium bricks are used in the vaults of the connecting channels. No special brick type is required. The oil hydraulic system kiln has a separate hydraulic system to automatically operate raw material feeding and finished product unloading. During commutation, the air/fume valve is hydraulically operated to release combustion and cooling air into the atmosphere. This system includes oil hydraulic power equipment, two pumps and heat exchangers, electric valves, hydraulic cylinders and distribution networks. Synthetic kiln design ideas In the 1950s, two Austrians realized a regenerative calcination process in a double-sinking shaft kiln, with three different geometries. The calcination process is the same as other kiln. In a rectangular kiln, gas flows between two kiln pots and is easily passed under one side wide arch. Unfortunately, the outside corner of this kind of kiln is weak. In this area, gas flows in a turbulent flow. The quality of lime at the discharge drawer is not uniform. This phenomenon often occurs in large-scale kiln. In circular kilns, circular kilns have very good calcination conditions due to the symmetrical circular cross section. However, problems still occur in the passage that completely surrounds the two kiln pots. First of all, if the limestone is not completely cleaned and there is a high content of alkaline substances, dust accumulation problems will inevitably occur frequently. Secondly, the disadvantage of circular kilns is that the lining of refractory linings for passages is expensive and requires many small support arches. In a semicircular kiln, the designer took a compromise: The simple problem of one-sided wide arches can be repaired, making the outer corners rounded to a shape closer to a circle. However, the outside corner will still cause lime quality problems like a rectangular kiln.
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