Method for processing fine ores used for blast furnace smelting by using raw ores

Abstract

The invention discloses a method for processing fine ores used for blast furnace smelting by using raw ores. The method comprises the following steps: extracting raw ores and extracting sieved powder of sintered ores according to an effective distribution ratio; pre-mixing the raw ores and the sieved powder of the sintered ores on a front-end shared belt to obtain the mixed materials; performing a first self impact, friction and mixing of the mixed materials while a chute of a belt transportation system is operated in a drop type, and then sending the mixed materials into a first vibrating sieve for a first jumping, rolling and friction and a first separation of sieve and powder to obtain a first sieved materials; performing a second self impact, friction and mixing of the first sieved materials while the chute of the belt transportation system is operated in the drop type, and then sending the first sieved materials into a second vibrating sieve for a second jumping, rolling and friction and a second separation of sieve and powder to obtain a second sieved materials; and performing a third self impact, friction and mixing of the second sieved materials while the chute of the belt transportation system is operated in the drop type, and then sending the second sieved materials into a third vibrating sieve for a third jumping, rolling and friction and a third separation of sieve and powder to obtain the fine ores.

Description

technical field [0001] The invention relates to an operation method suitable for various metallurgical industries, in particular to a method for processing concentrated ore smelted in a blast furnace by utilizing raw ore. The method is to process the purchased raw ore materials, separate the powder contained in the materials before loading the furnace as much as possible, and extract the fine lump ore that meets the blast furnace smelting requirements for blast furnace smelting. Background technique [0002] Concentrated ore is the main raw material for blast furnace smelting. The raw material requirements of the blast furnace smelting production process are that the powder content of the concentrate ore should be less, and the powder particle size is required to be less than 5mm, and the content should be ≤4%. The contained powder is separated, and the concentrated ore that meets the requirements of blast furnace smelting is extracted for blast furnace smelting, so as to i...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a method for extracting fine lump ore that meets blast furnace smelting, which can effectively reduce the amount of chute along the belt conveyor system and the screen of the vibrating screen during the processing of fine lump mineral materials. The phenomenon that the holes are easy to be blocked, and can effectively remove the adhesion on the surface of the processed raw ore material, which significantly improves the processing quality of the concentrate ore and increases the processing workload.