Steel belt conveyor furnaces are tailored to PM industry for the reduction of Fe, Cu, Co, Mo and W metal powders from respective oxides, also for the calcination and final reduction of Cobalt oxilate, APT and other metal salines.

The equipment has a large output and a relatively simple structure and it is easy to adjust process parameters and control product quality, so it has been used as upgrading equipment replacing the old generation of furnaces, such as two-tube, four-tube and multi-tube reduction furnaces. It consists of feeding, reduction, slow cooling, cooling and unloading zones.
Feeding zone includes feeding platform and entrance to muffle. On feeding platform there is a small feeding cart shuffling right and left to ensure well distributed feeding on the steel strip.
The muffle in reduction zone is made of SUS310S high temperature resistant stainless steel. The muffle shell is corrugated to increase its strength and is placed on a SiC plate, on which the muffle slides as it expands when heated.
Entrance at the feeding zone is sealed hermetically by a roller or by a gas curtain+ fiber curtain, leading to small gas consumption and nice seal.
Material convey system consists of steel belt, transmitting device and multi-grade tension device. The belt speed is adjustable through the stepless frequency regulator.
Temperature close-loop control system includes thermocouples, intellectual digital PID adjustor and SCR to ensure precise control of temperatures.

Specifications and types
GTH-1000/70-3
GTH-1000/70-5
GTH-1220/70-6
GTH-1220/70-10
GTH-1220/70-12

Rated furnace temperature (℃)
900

Highest temperature (℃)
1050

Furnace temperature deviation (℃)
±5

Annual production capacity Note (ton/annum)
1500
3000
5000
7500
10000

Width of steel belt (mm)
1000
1000
1220
1220
1220

Material of steel belt
1Cr18Ni9Ti/δ1.5mm

Material of muffle tube in heating section
Heat-resistance stainless/SiC and Si3N4 (according to buyer's option)

Number of heating zones
3 zones
5 zones
6 zones
10 zones
12 zones

Heating method
Electrical heating/Natural gas heating

Heating power (Kw)
150
300
420
630
840

Steel belt line speed (mm/min)
30~150
50~250
50~250
80~400
80~400

Thickness of iron powder (mm)
Adjustable from 15~50mm, generally is 30mm

Heating furnace body length (mm)
4000
7500
10000
7500×2
10000×2

Total length (mm)
about 16000
about 23000
about 28000
about 38000
about 48000