Method for high-valued utilization of chromium-containing dust sludge

• Main Authors: ZHANG YUANBO, TU YIKANG, JIANG TAO, LI GUANGHUI, RAO MINGJUN, SU ZIJIAN, PENG ZHIWEI
• Format: Patent
• Language: Chinese; English
• Published: 31.05.2024
• Subjects: ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses a method for high-valued utilization of chromium-containing dust sludge, which comprises the following steps: mixing raw materials including chromium-containing dust sludge, a flux, an iron-containing raw material and a fuel, pelletizing or briquetting to obtain a composite spherical material; the composite spherical material is subjected to pre-reduction roasting, and pre-reduced pellets are obtained; and after the pre-reduced pellets and coke are mixed, reduction smelting is conducted, and a ferrochrome product is obtained. According to the method, the chromium component in the chromium-containing dust mud can be efficiently separated and the ferrochrome alloy product can be obtained while the chromium-containing dust mud is thoroughly detoxified, a new way is provided for clean, efficient and large-scale treatment and utilization of the chromium-containing dust mud, and the method has a wide application prospect. 本发明公开了一种高值化利用含铬尘泥的方法，将包括含铬尘泥、熔剂、含铁原料、燃料在内的原料混合造球或压团，得到复合球形料；将复合球形料进行预还