Drying of furnace material is an important part of the metallurgical process. In the production process of ore, material needs to be heated to change its chemical and physical properties, which often requires the use of furnaces. In the process, the combustion of fuel can cause a large amount of heat and a variety of reactions. In order to meet the requirements of metallurgy and make the furnace materials have good performance, the furnace materials must not only have the right chemical composition, but also have the right moisture content.
The dehydration and drying of furnace materials are necessary processes in the production process of metallurgical materials. The basic principle of furnace material dehydration and drying is to take advantage of the heat from the furnace to remove the moisture from the furnace materials so that the furnace materials can meet the physical requirements for the subsequent processes of smelting and casting. Generally, the dehumidification and drying of the furnace material is divided into two parts: initial drying and drying for use.
In the initial drying process, the furnace material is heated to a certain temperature to complete the dehydration;In the later part of the process, the temperature should be increased to a certain temperature to remove the remaining moisture and transition from the initial dehydration to the later part of drying for use. Generally speaking, the higher the temperature of the furnace material, the faster the dehydration, and the better the effect of drying.
The raw material of the furnace should be dried to a moisture content of no more than 3% before it is used. In order to reduce the cost, most of the furnace materials are dried to a relative humidity of 50% or less before they enter the furnace for smelting. However, when the furnace temperature exceeds 1000℃, the oven drying process should be carried out to reduce the moisture content of the material and to achieve the requirements of subsequent processes.
In the drying process of furnace materials, not only the moisture of the material surface needs to be removed, but also the moisture inside the material needs to be removed. Heat conduction drying and surface drying are mainly used for the drying of furnace materials. The heating source of the heat conduction drying is mainly the outer heat source. The temperature of the heated surface of furnace materials is relatively low and only needs to reach the boiling point of water. It is more suitable for drying of materials with higher moisture content. The surface drying is mainly carried out by infrared drying, which can heat the surface of the material to a high temperature, which not only can dry the material, but also can help to reduce the moisture content of the material inside.
In the actual production, in order to achieve the best drying effect, not only the temperature and humidity of the blowing air need to be strictly controlled, but also the feeding speed, feeding interval and feeding amount of the material need to be controlled. In addition, the furnace material should be properly distributed and not be too dense on the conveying belt so as not to block the air flow and reduce the heat.
In summary, the drying of furnace material is an important part of the production of metallurgical materials, and the drying process is also very important. By controlling the temperature, humidity, feeding speed, feeding interval and feeding amount of the material, the dehydration and drying process can be efficiently performed.
