Research on the Molecular Structure of Refractory Bricks

After years of practice and renovation, continuously changing the masonry method of the furnace, improving the electrodes, changing the formula of the concrete, etc., effectively solved the floating bricks, salt leakage and other issues, and extended the life of the salt furnace. The refractory cement was converted into a phosphoric acid concrete masonry method using the traditional third method, but the surrounding refractory cement was replaced by a phosphoric acid concrete. Phosphoric acid concrete formulations are as follows: high-alumina bauxite clinker 30%, 3 ~ 5mm clay brick granules 35%, 10 ~ 14mm clay brick granules 35%, these three raw materials are well-distributed after mixing, collectively referred to as aggregate. Concentrated industrial phosphoric acid with a ratio of more than 85% is mixed with water in a ratio of 1:2, which is called cement.

After mixing the aggregate with the binder, stir it once every 2~3h, evenly cover with plastic film for 20~24h. The wet and dry degree can be pinched by hands, and the sticky and moist feeling is the best. Then the injection molding process can be carried out. During the injection process, the furnace must be fixed with a wooden mold and vibrated using a vibrating rod. This results in the formation of AlPO4 inorganic polymer structure with phosphoric acid and aggregates. The concrete is bonded together and the salt furnace is increased. Life expectancy. After the molding, it should be dried naturally for 3 months. If you need to use it, you must dry it naturally for more than 7 days. Then use firewood to dry for 7 days. Finally, at about 700°C, salt in the old salt furnace will be dumped into the new furnace. You can use it in the second day. Avoid water conservation. Changing the furnace firebrick construction method Salt bath furnace failure is mainly caused by the penetration of salt solution into the brick joints, which increases the brick joints between the refractory bricks, so that the salt solution contacts the furnace liner and causes a short circuit. Because the laying of bricks during masonry directly affects the size and direction of brick seams, it also directly affects the speed of salt solution infiltration.

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