Expansion slag bead casting drum

Abstract

The invention discloses an expansion slag bead casting drum, relating to treatment equipment used for a blast-furnace slag dry method pelletization process. The invention aims to provide the expansion slag bead casting drum which has simple structure and convenient, easy and stable operation and can cast high-temperature slag beads. The expansion slag bead casting drum comprises a barrel. The barrel is horizontally arranged on a workbench face through a supporting device, wherein one end of the barrel is provided with a power device; the power device drives the barrel to rotate along the axis; the outer surface of the barrel is outwards provided with a plurality of blades along the radial direction; and a cooling device for cooling the barrel and the blades is also arranged inside the barrel.

Description

technical field [0001] The invention relates to blast furnace slag processing equipment, in particular to an expanded slag bead projecting drum used in the blast furnace slag dry granulation process. Background technique [0002] Blast furnace slag is a silicate material with good performance. It can be used as a raw material for the production of building materials and fertilizers. At the same time, the temperature of liquid high-temperature slag is between 1350 ° C and 1500 ° C. It is a high-grade waste heat resource with high recycling value. At present, my country's liquid blast furnace slag is mainly quenched by water flushing slag, and the blast furnace slag after water cooling can be used to manufacture cement and other building materials. A large amount of hydrogen sulfide and sulfur oxide gases are discharged into the atmosphere along with the water vapor, causing environmental pollution. Each ton of slag is processed to produce 800m3 3 water vapor, where H 2 S co...

AI Technical Summary

Problems solved by technology

At present, my country's liquid blast furnace slag is mainly quenched by water flushing slag, and the blast furnace slag after water cooling can be used to manufacture cement and other building materials. A large amount of hydrogen sulfide and sulfur oxide gases are discharged into the atmosphere along with the water vapor, causing environmental pollution. Each ton of slag is processed to produce 800m3 3 water vapor, where H 2 S content 19mg / m 3 , SO 2 Content 4.3mg / m 3 ; The waste heat of the slag has not been effectively recycled; the moisture content of the water slag is high, and it still needs to be dried as a cement raw material, which requires a certain amount of energy; the investment and operation costs of the system are high, and a blast furnace with a daily output of 2,500 tons needs to be built. Two sets Water flushing slag equipment, construction investment is about 40 million yuan; in the process of water flushing slag, slag with high iron content is easy to cause explosion; and the use of water slag is relatively single

The wind quenching method uses a high-power granulation fan to generate high-pressure, high-speed airflow to blow off and granulate the slag flow. The main disadvantages are large power consumption, large and complex equipment, large floor area, and high investment and operating costs.

The centrifugal granulation method relies on the centrifugal force generated by the high-speed rotation of the turntable or cup to granulate the liquid blast furnace slag. Although it does not require high-energy-consuming equipment such as a granulation fan, and the particle size distribution of the granulated slag is small, it is The mechanical reliability of the high-speed rotary granulation device at high temperature is poor, and its adaptability to load changes has yet to be confirmed

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