Mixing and distributing system for large tanks and small tanks on furnace top of blast furnace and method

Abstract

The invention provides a mixing and distributing system for large tanks and small tanks on the furnace top of a blast furnace and method. The mixing and distributing system for the large tanks and thesmall tanks on the furnace top of the blast furnace comprises the two large tanks, the two small tanks, a turning plate chute and a center throat pipe. The two large tanks are symmetrically arrangedside by side. The two small tanks are arranged in a vertical series-connection manner and located on the symmetrical faces of the two large tanks. The volume of the small tanks is 20-25% of that of the large tanks. The turning plate chute is arranged above the upper small tank and the two large tanks, can rotate horizontally and can be turned over in the vertical direction. The center throat pipeis arranged below the lower small tank and the two large tanks. The four tanks are provided with independent pressure equalizing systems and diffusing systems correspondingly. In combination with thespecific technology requirement, matching is carried out flexibly, the time sequence for distributing is set, the problem that crude fuel is loaded into the blast furnace in a classified manner according to the quality can be solved, and the system belongs to the technical field of metallurgical equipment research and improvement.

Description

technical field [0001] The invention belongs to the technical field of research and improvement of metallurgical equipment, and relates to a system and method for mixing material distribution of large and small tanks on the roof of a blast furnace. Background technique [0002] With the continuous mining of coal resources and iron ore resources, the raw materials for blast furnace ironmaking are constantly changing, including fluctuations in the particle size and strength of coke and sinter, which have a great negative impact on the stable production of blast furnaces. However, different parts of the blast furnace (especially the radial direction) have different requirements for raw materials and fuels, and there are also large differences in air permeability. In order to make the distribution of high-quality and low-quality raw materials in the blast furnace controllable, it is necessary to realize the graded and qualitative loading of raw materials when distributing materi...

AI Technical Summary

Problems solved by technology

However, most of the blast furnaces now adopt the furnace top and tank distribution system, and the inlet and outlet of the tank are close to the center line of the blast furnace. As a result, when the raw fuel is loaded into the tank, the material flow trajectory collides with the side wall of the tank, resulting in obvious natural mixing and natural segregation, etc., it is impossible to flexibly realize the classification and quality of raw materials into the furnace according to the production requirements

There are also some blast furnaces that use the furnace top string tank distribution system, which also has the problem of not being able to realize the loading of raw materials in different grades.

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