Hot steel-making slag high-temperature solidification, pelletization and heat recovery method and equipment system thereof

• Main Authors: LIAO HONGQIANG, DENG DEMIN
• Format: Patent
• Language: English
• Published: 29.04.2015
• Subjects: CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; MANUFACTURE OF IRON OR STEEL; METALLURGY; METALLURGY OF IRON; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

The invention provides a hot steel-making slag high-temperature solidification, pelletization and heat recovery method and an equipment system of the method. The method comprises the following steps: firstly, performing mechanical mixing and primary pelletization on solid dielectric and hot steel-making slag; secondly, performing secondary pelletization on high-temperature slag after cooling; finally, performing hydration treatment on steel-making slag which is cooled and subjected to heat exchange. The equipment system of the method mainly comprises a feeding system, a slag supply system, a high-temperature slag stirrer, a high-temperature slag feeder, a cooling pelletizing device, a gas circulation system, a heat recovery system and a water cooling system and the like. The hot steel-making slag high-temperature solidification, pelletization and heat recovery method and the equipment system of the method have the advantages that the problem of continuous and stable feeding of hot steel-making slag with different viscosity under high temperature on the premise of heat retention is solved, and other problems such as slag hole blockage, caking, poor durability of high-temperature slag feeder and the like are solved, therefore, high-efficiency steel-making slag heat recovery and continuous sealing cleaner production of the steel-making slag can be facilitated.