Under-tank grading ore coke trough feeding system and feeding process

Abstract

The invention discloses an ore and coke tank feeding system and technology capable of realizing classification below tanks. The system comprises ore and coke tank bodies, a main material tape machine and a return material tape machine, wherein three-stage screening equipment is arranged below the ore and coke tank bodies; two weighing hoppers corresponding to two higher particle size classes are arranged below each piece of three-stage screening equipment and connected with outlets of the two higher particle size classes through feeding chutes respectively; the outlets of the two weighing hoppers are provided with mixing feeding machines for feeding materials to the main material tape machine according to the quantity; outlets with the lowest particle size class of the three-stage screening equipment are connected to the return material tape machine through another chutes to recover coke nuts or ore nuts. With the adoption of the system and the technology, crude fuel is divided into three classes through one-time screening, two materials at required particle size classes enter different weighing hoppers simultaneously, the arrangement is concise, material transfer links below the tanks are reduced, the material crushing rate is decreased, the engineering investment is reduced, the production cost is saved, accurate layered mixing is realized, and raw materials are fully mixed. Meanwhile, classified charging of the crude fuel for smelting is reliably guaranteed.

Description

technical field [0001] The invention belongs to the technical field of ore coke troughs and feeding systems in ironmaking production in the iron and steel metallurgy industry, and in particular relates to a coke trough feeding system and a feeding process for under-trough classification. Background technique [0002] Grading of raw fuel into the furnace is a smelting method of blast furnace smelting, and it is an important means to realize the smooth flow of the blast furnace, the reasonable distribution of airflow, and the improvement of gas utilization. Usually, the classification of raw materials is to divide the raw materials into two grades, and recover a certain amount of ore or coke. [0003] According to the actual situation of the factory, raw materials and fuels can be graded at different locations, mainly in the following ways: [0004] 1. Raw material factories are classified, such as sintering plants, coking plants or raw material plants. The grading of the ra...

AI Technical Summary

Problems solved by technology

This grading method has complex arrangement of under-trough screening and material return process, many staggered supply and return belt machines, relatively high investment, many times of raw material transshipment, many times of secondary screening materials falling, and there is also the problem of secondary crushing of materials , and the vibrating screen load for secondary screening is relatively large

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