用光伏污泥焚烧灰渣制备轻集料

针对工业污泥焚烧灰渣处置难的现状，以光伏污泥焚烧灰渣为主要原料制备轻集料。确定轻集料烧制的最佳条件为，黏土投加量为70%，MgO投加量为5%，污泥焚烧灰渣投加量为25%，预热温度为450 ℃，预热时间为15 min，焙烧温度为1 050 ℃，焙烧时间分别为10 min，所制备出的轻集料的抗压强度为9.52 MPa，堆积密度为867 kg·m-3，烧失量为0.12%，1 h吸水率为1.94%。所制得的轻集料强度高，吸水率小，符合《轻集料及其实验方法.第二部分：轻集料实验方法》（GB/T 17431.2-2010）的要求，可为光伏污泥焚烧灰渣资源化提供理论指导。

Preparation of light aggregate with photovoltaic sludge incineration ash

This thesis is aimed at the difficult disposal situation of Industrial sludge incineration ash, preparing lightweight aggregate with photovoltaic sludge incineration ash as the main raw material. The lightweight aggregate has the best performance when dosage of clay is 70%,dosage of MgO is 5%,dosage of sludge incineration ash is 25%,preheated at 450℃ for 15 min and sintered at 1 050℃ for 10 min,whose compressive strength of the ceramic is 9.52 MPa, bulk density is 867 kg·m-3, loss on ignition is 0.12%, water absorption per hour is 1.94%.The lightweight aggregate has the characteristic of high-strength and low water absorption and the preparation method is in line with requirements of 'lightweight aggregate and test methods for the second part:lightweight aggregate test' (GB/T 17431.2-2010),which can provide theoretical guidance for resource recovery of photovoltaic sludge incineration ash.