Double-burning and double thermal heat storing type energy-saving high efficiency furnace and tank integrated reducing furnace system

Abstract

The invention discloses an integrated reducing furnace system of a dual-combustion and dual-heating regenerative energy-saving and high-efficiency retort. The integrated reducing furnace system comprises a furnace body part and a heating part. The furnace body part comprises: a reduction pot in which a central combustion chamber and a charging chamber are arranged, wherein, a high-temperature fume exhaust radiant heat tube is arranged in the charging chamber; a feed port which is connected with the charging chamber; a magnesium crystal collector; a sullage pipe; a combustor which is connectedto the top of the central combustion chamber; an insulating shell and an outer fume chamber, wherein, the insulating shell is arranged outside the reduction pot, and an external heating combustor is arranged on the top surface of the insulating shell. Air in the combustor is preheated and premixed by a regenerator and fuel, then is jetted into the central combustion chamber by electrical high tension ignition and combusts in the central combustion chamber. The integrated reducing furnace system has the most significant innovation of being compatible for internal combustion and external combustion, having higher efficiency and more obvious benefit.

Description

technical field [0001] The invention relates to a metal reduction furnace, and mainly refers to a dual-combustion, double-heat-storage type energy-saving and high-efficiency furnace tank integrated reduction furnace system for refining magnesium metal. Background technique [0002] The traditional magnesium smelting process is the Pidgeon method. This method uses a horizontal furnace. There are several reduction tanks placed horizontally in the furnace. The reaction material pellets are filled in the reduction tanks. The radiant heat of the reverberatory furnace first heats the reduction tank, and then the reduction tank radiates heat to the reaction material pellets, and then the pellets transfer heat by relaying each other, which is a peripheral heating (see Figure 5 ). According to practice, this heating method has a small heat transfer rate in the reduction tank, a large temperature gradient, poor temperature uniformity, and a large heat radiation transfer radius, so th...

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Problems solved by technology

According to practice, this heating method has a small heat transfer rate in the reduction tank, a large temperature gradient, poor temperature uniformity, and a large heat radiation transfer radius, so that the material in the tank can reach the reduction temperature of 1150-1200 degrees required by the process, and the time is too long. It takes 10-12 hours for a cycle, plus the volume of the reduction tank is too small, each tank can only hold a few hundred kilograms of material each time, resulting in the need to invest in multiple furnaces and multiple tanks to meet the production capacity requirements

Therefore, the Pidgeon method has disadvantages such as low production efficiency, high labor intensity, high energy consumption, low magnesium yield, and serious environmental pollution.

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