High-efficiency magnetic roasting boiling furnace

Abstract

The invention relates to a high-efficiency magnetic roasting boiling furnace of a sulfurous iron ore calcination acid making device. The boiling furnace provided by the invention is characterized in that the whole section in an air chamber is provided with a gas pre-sparger, the tilt angle of the charging opening is of a 35-degree groove type structure, and the distance from the bottom of the charging opening to air caps is greater than or equal to 2600 mm; a deslagging heat recovery unit is arranged for deslagging cooling and heat recovery; the air caps are arranged at high density of 80-100 / m<2>, and the fluidized state of a boiling bead is optimized; and a tertiary air device is arranged along the tangential direction of a furnace body. According to the invention, the air chamber is provided with the pre-sparger and the gas distribution plate is provided with the air caps at high density, the fluidization condition is effectively improved and a boiling layer is guaranteed to be a weak oxygen state, and the flow distribution is uniform; and the tilt angle of the charging opening is improved as the 35-degree groove type structure, the charging material height is improved, the mineral aggregate is not stacked, the roasting temperature is improved, the slag disabled sulfur content is reduced, meanwhile, the inlet air is supplementally added, the sublimed sulfur is not generated, and the magnetic firing condition is met.

Description

technical field [0001] The invention relates to a high-efficiency magnetized roasting fluidized furnace for pyrite roasting acid production equipment. Background technique [0002] Fluidized fluidized furnace is one of the main equipments in the roasting process of pyrite acid plant. There are two main shapes of the furnace: straight cylinder type and Luqi type (upper enlarged type). The straight fluidized fluidized furnace is mostly used for roasting of non-ferrous metal flotation ore, and the roasting intensity is low, while the upper enlarged fluidized fluidized furnace is mostly used for roasting pyrite due to the roasting intensity, and most of the ore roasting furnaces in my country belong to this type. [0003] The fluidized fluidized furnace body is a steel shell lined with insulation bricks and then lined with refractory bricks. The furnace body can be divided into several parts. The lower part is the air chamber, which is the air chamber, and the air is supplied b...

AI Technical Summary

Problems solved by technology

[0007] 2. Uneven air distribution

The air chamber mostly adopts the air inlet pipe or the central column air distribution method, which requires the volume of the air chamber to be large enough. If the air in the air chamber cannot completely eliminate the intake dynamic pressure head to make it uniformly distributed, it will cause poor boiling conditions , in severe cases, it may even fail to open when the temperature rises, or it may cause partial sintering, which will cause the hood to burn out, and the air chamber will leak into the dust and other consequences.

[0008] 3. Stove row red slag or brown red slag

[0009] 4. The slag discharge system has a high failure rate and frequent shutdowns

Taking a 200,000-ton / year pyrite acid plant with a sulfur content of 35% (the same below) as an example, the fluidized fluidized furnace discharges about 10 tons of slag per hour, and the temperature of the discharged slag is 900°C. This part of the slag is cooled by spraying water outside the cooling drum to Sent away at around 400°C, slag heat is not recovered, and consumes a lot of water, resulting in energy waste and environmental pollution

At the same time, the slag discharge system has many operating links, involving slag discharge, conveying, water spray cooling, sewage adjustment, process and control, etc. Complicated, the working conditions are poor

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