Fluidized roaster is a process by which new materials or new products are heated at a high level to make them undergo some physical or chemical changes at a high temperature, so as to obtain newer and better materials or products.

Working principle

The air from the bottom of the furnace into the air distributor into the furnace, when the air at a certain velocity from the bottom up blowing granular material layer, the whole material layer under the air agitation, furnace charge particles separated them up and down, as long as the wind speed does not exceed a certain limit, furnace charge particles is within the scope of a certain height in a suspended state, causing ore grain contact with gas conditions.The heat exchange between gas and solid is fast, the reaction is intense, and the temperature of the layer is even.

Feature

1. High roasting intensity.

2. Low residual sulfur of slag.

3. Low grade ore can be roasted.

4. High sulfur dioxide concentration and low sulfur trioxide content in furnace gas.

5. Uniform hearth temperature.

6.Simple structure, no rotating parts, low investment and low maintenance cost.

7.Less operation personnel, high degree of automation and low operation cost.

8.Fast and convenient driving, less air pollution caused by parking.But effervescent furnace gas belt ore dust is more, the air blower power consumption is larger.

Structure

The furnace body of boiling roasting furnace is composed of steel shell lined with insulating brick and then lining firebrick.In order to prevent condensation acid corrosion, steel shell outside the insulation layer.The lower part of the furnace is the air chamber, with an air inlet pipe, and the upper part is an air distribution plate.On the air distribution plate is a refractory concrete hearth, embedded with many side holes in the hood.The central part of the furnace is an upward expanding cone, and the cross-sectional area of the upper roasting space is larger than that of the boiling layer, so as to reduce the blowing out of solid particles.The cooling tube of waste heat boiler is installed in the boiling layer, and the furnace body is also provided with feeding port, slag overflow port, furnace gas outlet, secondary air inlet, ignition port .The top of the furnace has explosion-proof holes.