High-efficiency method and equipment for homogeneous mixture of material

Abstract

A high activity uniform mixing technique of ferruginous powdered ore and reduction coal powder is applicable for mixing ferruginous powder and coal powder in coal-based direct-reduction process in metallurgy of iron and steel, wherein the technique comprises steps of feeding accurately weighed ferruginous powdered ore and coal powder to a multi-target multi-direction paddle mixer to be mixed, then feeding metered bond to the mixer by a spray pipe, wherein the mixer is provided with a sealed and ventilating feeding device, a discharge hole and a discharge door on the body, can prevent powder material from being leaked and does not pollute environment. The obtained mixture is pressed tightly, and mixing process is realized by PLC, so as to prepare for next agglomeration. The invention has the advantages of high mixing uniformity, short mixing time, convenient adjustment, high flexibility ratio, low power consumption, reliable equipment operation, easy maintenance and replacement, airproof operation and less pollution.

Description

Technical field [0001] The invention relates to a method and equipment for uniform mixing of iron-containing minerals and reduced coal powder after batching, and is suitable for mixing iron ore powder and coal powder in the pelletizing raw material preparation process of the coal-based direct reduction method in the iron and steel metallurgical industry , It can also be used for mixing ordinary iron ore, vanadium-titanium magnetite, titanium concentrate, etc. with other additives. Background technique [0002] In the production of pellets, uniform mixing of the mixture of iron-containing ore powder and coal powder can reduce the amount of additives and solve the problem of uneven distribution of raw materials after batching. The mixing method and its mixing equipment affect the uniformity of the mixture, which directly affects the molding rate of the material, and has a great impact on the iron grade of the pellets, the quality of the reduction, and the output. [0003] The...

AI Technical Summary

Problems solved by technology

[0005] 1. The main disadvantage of the cylindrical mixer is poor mixing uniformity. Due to the need for multi-stage mixing, the equipment structure is complex and huge, and the energy consumption is high. If the process is wrong, there will be irreparable problems.

[0006] 2. Single screw type, the mixing uniformity is very poor, and it is difficult to control the uniformity

[0007] 3. Double helix type, poor mixing uniformity, bulky and complicated equipment, high power consumption, poor process control flexibility, inflexible operation, making it difficult to adjust the uniformity, and cannot fully mix

[0008] 4. The powerful mixer is composed of multiple motors with vertical and horizontal transmission, high power consumption, easy to accumulate materials and sticky materials in the cylinder, it is difficult to clean, and the mixing uniformity is not ideal

[0009] 5. Wheel mill mixer, small capacity, high power consumption, heavy equipment, poor mixing uniformity

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