种基于回转窑直接还原焙烧-磁选的赤泥综合利用方法

• Format: Patent
• Language: Chinese
• Published: 28.09.2018
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; CRUSHING, PULVERISING, OR DISINTEGRATING; CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; FERROUS OR NON-FERROUS ALLOYS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; LIME, MAGNESIA; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLIDMATERIALS OR FLUIDS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROMSOLID MATERIALS OR FLUIDS; MANUFACTURE OF IRON OR STEEL; METALLURGY; METALLURGY OF IRON; MILLING GRAIN; PERFORMING OPERATIONS; PREPARATORY TREATMENT OF GRAIN FOR MILLING; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; REFRACTORIES; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS; SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATICTABLES OR JIGS; SLAG; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; TREATMENT OF NATURAL STONE

本发明提供种基于回转窑直接还原焙烧-磁选的赤泥综合利用方法，属于资源综合利用技术领域。该方法以赤泥为原料，煤粉为还原剂，钛磁铁矿为添加剂，淀粉和膨润土为粘结剂进行压球，采用直接还原焙烧-磁选工艺回收铁，回收铁后的尾矿添加调理剂调节成分，然后添加水泥后生产不同种类的建筑材料。该方法的优点是能使赤泥得到完全利用，把赤泥与钛磁铁矿混合后进行还原焙烧，钛磁铁矿能促进还原过程的进行，同时使用成本低的煤为还原剂，磁选得到的尾矿经调理，能够生产建筑材料。最终得到铁品位在92％以上的直接还原铁块，铁的回收率般都大于85％，其他成分满足直接炼钢的要求。 The invention provides a direct reduction roasting-magnetic separation red mud comprehensive using method based on a rotary kiln, and belongs to the technical field of resource comprehensive using. According to the method, red mud serves as a raw material, coal powder is a reducing agent, titanomagnetite is an addition agent, starch and bentonite are binder for conducting ball pressing, iron is recovered by adopting a direct reduction roasting-magnetic separation technology, amendment is added into tailings after the iron is recovered for adjusting ingredients, and then, after cement is added, different kinds of building materials are produced. The method has the advantages that the red mud can be fully used, after the red mud and titanomagnet