Abstract: A cooperative emission reduction method for sintering using an energy-carrying composite gas is disclosed. A surface of a sintered material is divided into an ignition section, a heat preservation section, a middle section, a flue gas heating section, and a machine tail section from a machine head to a machine tail of a sintering machine; according to flue gas components, temperature characteristics, and heat requirements of different sections, a hot exhaust gas is introduced to the ignition section for ignition, a hot exhaust gas is introduced to the heat preservation section and a hydrogen-rich gas is cascadingly sprayed synchronously, cascaded spraying of water vapor is coupled based on spraying of a hydrogen-rich gas in the middle section, and the high-temperature flue gas in the machine tail section and the flue gas in the ignition section and/or the heat preservation section are circulated to the heating section.

Abstract: A composite organic binder and methods for preparing and using the same are disclosed. The composite organic binder is made of the following components in mass percentages: 0.97-1.13% of polyethylene oxide and 98.87-99.03% of a papermaking sludge. The composite organic binder could solve the problems of high residual rate, poor pellet strength and low pellet iron grade existing in the process of producing iron ore pellets with bentonite and other binders. Results of examples show that green pellets have higher strength and shock temperature and the finished pellets have higher iron grade and excellent metallurgical properties, if the composite organic binder is used in an amount of 0.4-0.6% of the dry weight of iron ore concentrate.

Abstract: A cooperative emission reduction method for sintering using an energy-carrying composite gas is disclosed. A surface of a sintered material is divided into an ignition section, a heat preservation section, a middle section, a flue gas heating section, and a machine tail section from a machine head to a machine tail of a sintering machine; according to flue gas components, temperature characteristics, and heat requirements of different sections, a hot exhaust gas is introduced to the ignition section for ignition, a hot exhaust gas is introduced to the heat preservation section and a hydrogen-rich gas is cascadingly sprayed synchronously, cascaded spraying of water vapor is coupled based on spraying of a hydrogen-rich gas in the middle section, and the high-temperature flue gas in the machine tail section and the flue gas in the ignition section and/or the heat preservation section are circulated to the heating section.