Method for preparing ceramic material from aluminum ash hazardous waste: Fid-Bau Portal

Method for preparing ceramic material from aluminum ash hazardous waste

SHU WENXUE

The invention belongs to the technical field of ceramic materials, and discloses a method for preparing a ceramic material by utilizing hazardous aluminum ash waste, which comprises the following steps: separating aluminum, aluminum oxide, aluminum carbide and aluminum nitride mixed powder from secondary aluminum ash by an electric separation method; grinding the mixed powder, and sieving with an eight-mesh sieve; adding the screened mixed powder and carbon black powder into a stirring type high-energy ball mill for ball milling; putting the ground mixed powder into a carbon tube furnace, introducing flowing nitrogen into the carbon tube furnace, and carrying out staged heating to obtain aluminum nitride powder: adding Y2O2 into the aluminum nitride powder, and carrying out mixed grinding in absolute ethyl alcohol for six hours; preparing the AlN powder into a blank; and the blank is placed in an atmosphere pressurization sintering furnace to be sintered, and the AlN ceramic sintered body is prepared. According to the method, mixed powder of aluminum, aluminum oxide, aluminum carbide and aluminum nitride can be extracted from the aluminum ash, then the mixed powder is heated and subjected to heat preservation in different atmospheres at different temperature sections, aluminum nitride is generated, then aluminum nitride ceramic is formed, and waste is turned into wealth.

本申请属于陶瓷材料技术领域，公开一种利用铝灰危废制备陶瓷材料的方法，包括以下步骤：通过电选法从二次铝灰中分离出铝、氧化铝、碳化铝和氮化铝混合粉末；对混合粉末进行研磨，过八千目筛；将步筛选后的混合粉末和炭黑粉末加入到搅拌式高能球磨机内进行球磨；将研磨后的混合粉末置于碳管炉中，在碳管炉接通流动氮气中进行分阶段加热，得到氮化铝粉末：在氮化铝粉末中加入Y2O2，在无水乙醇中混磨六小时；将AlN粉末制成坯料；将坯料置入气氛加压烧结炉中进行烧结，制得AlN陶瓷烧结体。本申请可以对铝灰提取铝、氧化铝、碳化铝和氮化铝混合粉末，然后对混合粉末进行不同温度段不同气氛下进行加热保温，生成氮化铝，然后形成氮化铝陶瓷，变废为宝。

Zugriff

Download

Seitennavigation

Dokumentinformationen

Ähnliche Titel

Exportieren, teilen und zitieren