Blast furnace slag granulation device

Abstract

The invention provides a blast furnace slag granulation device which comprises a vertical granulation slag tank, a slag guide slot, a spray device, a steam outlet, a bevel gear, a gear, an electromotor, a main shaft, a milling granulation cutter, a milling granulation cutter cooling guide cover, a forced slag discharge device, slag quantity distribution control valves and an electric-hydraulic push rod in mutual connection, wherein the milling granulation cutter is mounted below the slag guide slot and the steam outlet and connected with the electromotor through the main shaft and the bevel gear; the forced slag discharge device is mounted on the lower side of the milling granulation cutter and at the upper end of a bottom plate of the vertical granulation slag tank; the slag quantity distribution control valves are mounted at the upper ends of two slag discharge pipes below the bottom plate of the vertical granulation slag tank respectively; the electric-hydraulic push rod is mounted on a base frame of the wall of the vertical granulation slag tank; the right half part of the milling granulation cutter is sleeved with the milling granulation cutter cooling guide cover of the milling granulation cutter, and the milling granulation cutter cooling guide cover is connected with the wall of the vertical granulation slag tank. The blast furnace slag granulation device provided by the invention has the advantages of compact structure, short granulation period, high glass phase degree of finished products of slag, and long service life of the granulation cutter.

Description

Technical field: [0001] The invention belongs to the technical field of blast furnace slag treatment, in particular to a blast furnace liquid slag granulation and decomposition device. Background technique: [0002] Blast furnace slag is one of the main by-products produced in the blast furnace ironmaking process. These slags not only occupy a large amount of valuable land, but also cause great environmental pollution. Therefore, solving the problem of blast furnace slag reuse is the primary task of environmental pollution control. In fact, blast furnace slag is actually a high-grade, high-value resource. First, the sensible heat of blast furnace slag is a high-grade waste heat resource and has a high recovery value. Second, the subsequent utilization of blast furnace slag is also of high value, such as the base material of cement. At present, most iron and steel enterprises use the water quenching process to treat blast furnace slag. The disadvantages of this method are: ...

AI Technical Summary

Problems solved by technology

At present, most iron and steel enterprises use the water quenching process to treat blast furnace slag. The disadvantages of this method are: the sensible heat of blast furnace slag is basically not recovered, and it causes a lot of waste of water resources. The organic steam containing harmful substances produced by water quenching is harmful to the atmosphere, Water and soil are also heavily polluted, deteriorating the working environment

However, there are also some problems in the current rotary cup granulation method: for example, because the rotating cup body of the rotary cup granulation method has a high speed of 1000-3000r / min, industrial bearings are difficult to withstand under high temperature, high speed, and harsh environments. The life is difficult to meet the requirements of use; because the rotating cup is in direct contact with high-temperature slag, the structure of the rotating cup and the slag granulation process are limited, the cooling of the rotating cup body is difficult to solve, and the working life of the rotating cup is difficult to meet the requirements of use , until now there is no precedent for industrial application

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