What is Liaoning reducing iron calciner?

Liaoning reduced iron calciner is a kind of thermal equipment for high-temperature heat treatment of carbon containing raw materials (such as coke, anthracite, etc.) to improve the performance of raw materials. Iron smelting, rare metal recovery, catalyst production, environmental improvement, special chemicals production and other equipment. After calcination, most of the moisture and volatile matter in the raw materials are removed, the volume is reduced, and the density, strength and conductivity are correspondingly improved. The purpose of calcination is firstly to improve the performance of raw materials, and secondly to stabilize the volume of raw materials, so that the formed raw materials will not crack in the subsequent calcination process.

The improvement of raw material performance of Liaoning reduced iron calciner depends on the heat treatment temperature. The calcination temperature has a great relationship with the calcination quality, which should be determined according to the type of raw materials, the use of products and the structure of the furnace. Due to different technical viewpoints, the determination of calcination temperature varies from country to country.

As the main component of carbon raw material is carbon, which is flammable, direct contact with air should be avoided as far as possible during the whole calcination process to reduce oxidation loss. It can be seen that indirect heating is suitable for calcination, while direct heating should try to establish a reducing atmosphere and strictly control the amount of excess air. Carbon raw material contains a certain amount of volatile substances, which is a combustible component with high calorific value. During the calcination, the volatile matter is gradually discharged. If they can be used, a large amount of heat can be recovered and the heat consumption of calcination can be reduced. However, if it is used improperly, it will also lead to blockage, damage to equipment and environmental pollution. The calciners used for carbon materials at home and abroad mainly include rotary kiln, tank calciner, rotary bed calciner, electric calciner and coke oven. Due to different furnace structures and process conditions, these furnace types differ in heat source, heat transfer mode and calcination atmosphere. Tank calciner and coke oven belong to indirect heating. The heat of smoke in the fire passage is transferred to the calcined material through the refractory brick as the fire passage wall. Rotary kiln and rotary bed calcination is another direct heating method.

The high-temperature flue gas of Liaoning reduced iron calciner is in direct contact with calcined materials. At this time, the combustion loss of carbon is greater than the previous heating type of basic air isolation. The electric calciner takes the calcined material as a resistance heater, converts electric energy into heat energy, and heats the calcined material itself. Liaoning reduced iron calciners can be classified from different angles. According to the heat energy supply mode, it can be divided into fuel burning type and electric heating type, rotary type and fixed type according to the type of furnace bed, and indirect heating, direct heating and self heating according to the heating mode of calcined materials.