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The rotary refining furnace is also called a rotary anode furnace, as shown in Figure 1. Mainly used for the refining of liquid blister copper. The operation cycle is generally divided into four stages of feeding, oxidation, reduction and casting, and the product is used for the anode copper power supply. Rotary refining furnaces are mainly used in large or extra large copper smelters.
The rotary refining furnace is arranged in the melting workshop together with the melting furnace and the converter, and is a thermal equipment for refining crude copper into anode copper. The refining furnace is arranged after the converter. At the other end of the melting workshop, the raw material is sourced from the converter, and the hot material is fed into the furnace. The fuel used in the refining process is mostly liquid fuel, and only a few smelters use solid fuel and gaseous fuel.
The rotary refining furnace is mainly composed of four parts: furnace body, supporting device and driving and control system. The main related equipments include combustion device, combustion air system, oxidant, reducing agent, steam, compressed air, cooling water and process piping.
The rotary refining furnace is a horizontal cylindrical furnace body, and the horizontal circular crucible furnace body has two kinds of heads. The flat head end plate is connected with the cylinder by the compression spring; the disc head does not press the spring, the head and the cylinder are integrated, and the shell steel structure is used to manufacture the cylinder. However, the brick-shaped head is difficult to lay bricks, and the masonry technology is high.
The cylindrical furnace body is provided with various orifices such as a furnace mouth, a burner mouth, a redox hole, a sampling hole, a copper outlet, and a smoke exhaust port.
The rotary refining furnace differs from the stationary refining furnace in that there is no fixed molten pool (slag) line. The erosion of the slag and the erosion of the molten metal almost involve more than 2/3 of the inner surface of the furnace; since the furnace needs to be rotated frequently, the masonry The body and the steel shell of the furnace must be in close contact, and the friction between the masonry and the steel shell is increased. The rotational torque is overcome to maintain the stability of the survey body. Therefore, the thickness of the masonry should be reduced as much as possible under the conditions of the surface temperature of the shell.
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