Iron mine pellet raw material preparation method facilitating efficient pelletizing

Abstract

The invention relates to the field of research of pellet mine manufacturing techniques of the iron and steel metallurgy industry, in particular to an iron mine pellet raw material preparation method facilitating efficient pelletizing. The method includes the steps that whether iron concentrate fines are coarse materials or fines is judged, if the iron concentrate fines are the coarse materials, the iron concentrate fines are subjected to wet grinding after pre-dosing; the iron concentrate fines are dried and smashed by a high pressure rolling mill; the iron concentrate fines after smashing aremixed with bentonite and the like to obtain a pellet mixture through intensive mixing; the pellet mixture enters a pelletizer to be subjected to pelletizing to obtain pelletizing green-balls; and thewater content of the pelletizing mixture before entering the pelletizer and the water content of the pelletizing green-balls are separately detected, the pelletizing mixture before entering the pelletizer is automatically regulated and intensively mixed with water, and the pelletizing mixture water content range is controlled below 0.3%-0.5% of the green-ball suitable water content. According tothe iron mine pellet raw material preparation method facilitating efficient pelletizing, the technical problem that the water content of production raw materials is difficult to control in the preparation process is solved, and the strength and the production efficiency of pelletizing green-balls are improved.

Description

technical field [0001] The invention relates to the technical research field of pellet production in the iron and steel metallurgical industry, in particular to a method for preparing raw materials for iron ore pellet production that is beneficial to high-efficiency pelletization. Background technique [0002] In the past ten years, the production of iron ore oxide pellets in my country's iron and steel metallurgical industry has developed rapidly. At present, there are mainly three pellet production processes: shaft furnace method, belt roaster method, and chain grate-rotary kiln method. [0003] Pelletizing, also known as rolling forming, is the most important production process indispensable in the above three pellet production processes. The quality of the pelletizing process determines the quality of the finished pellets to a large extent, so it is very important to prepare the raw materials for pellet production before the pelletizing process. [0004] Raw materials f...

AI Technical Summary

Problems solved by technology

[0014] The invention provides a raw material preparation method for iron ore pellet production which is beneficial to high-efficiency pelletizing. The moisture content is controlled by steps such as drying the iron ore concentrate powder with a cylinder dryer, detecting the moisture content of the pellet mixture, and automatically controlling and adjusting water addition. , which solves the technical problem that it is difficult to control the moisture content in the process of preparing raw materials for production

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