Method for producing iron ore concentrate by quickly burning siderite through microwave

Abstract

The invention provides a method for producing iron ore concentrate by quickly burning siderite through microwave, comprising the steps of placing the siderite powders into a microwave reactor and introducing oxygen to heat the siderite to 400-700 DEG C at a frequency of 2450 MHz and an input power of 50-300 W / Kg; and then keeping the temperature for 10-20 minutes to obtain high-grade iron ore concentrate with Fe3O4 being the principal component. The method has the characteristics of cleaning, energy saving, low cost, and small pollution. The iron ore obtained after calcination is of high grade and the high-temperature smog can be further applied to drying the iron ore concentrate after dust extraction.

Description

technical field [0001] The invention relates to a process method for obtaining iron concentrate by calcining siderite, in particular to a method for producing iron concentrate by rapidly calcining siderite with microwaves, and belongs to the technical field of iron concentrate production. Background technique [0002] Siderite (including single siderite, hematite, limonite, siderite and other symbiosis) resources are very rich. The world's proven reserves are about 1.8 billion tons, accounting for 14% of the world's total iron. It is predicted that siderite accounts for more than 40% of the potential resources of iron ore in the world. Due to the low grade of natural siderite (theoretical iron grade is only 48.3%), the actual iron content of rich siderite is 30-40%, and it is easy to produce muddy phenomenon during the grinding process. Mineral symbiosis often contains high sulfur, and it is very difficult to directly beneficiate ore. [0003] At present, siderite and asso...