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Alumina Rotary Kiln

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Alumina Rotary Kiln

Model: Φ2.2x38m--Φ4.3x64(m)

Capacity: 30tpd-200tpd(t/h)

Material: Alumina

Materials:(different sizes for 120 kinds of stones)

  • benonite

    benonite

  • cement

    cement

  • clay

    clay

  • coals

    coals

Applied material:

Alumina rotary kiln is a kind of equipment commonly used to produce high purity alumina, and also widely used in other fields, such as metallurgy, chemical industry, etc.. Its main structure includes cylinder, wheel belt, supporting wheel, gear ring, hydraulic equipment, inlet and outlet device, etc. Its working principle is to thermally decompose the alumina ore into alumina and water vapor under high temperature and pressure.

There are two types of rotary kilns used in alumina production. One kind resembles a firing kiln, where the material has physical and chemical changes in the kiln, with complex control and high working temperatures. The table is fed with a wet lance and is a wet kiln.

There is another kind of kiln is only dehydration operation, will be attached to the aluminum hydroxide water and crystallization water in 1100 ℃ temperature conditions off, into powder alumina, this kiln is drying nature, become roasting kiln. These two types of kiln are basically identical in structure and work on the same principle.

Working Principle:

The working principle of alumina rotary kiln is to thermally decompose alumina ore into alumina and water vapor under high temperature and pressure. As the alumina ore rotates through the barrel of the rotary kiln, the water and crystalline water in the ore is heated and evaporated, while the alumina in the alumina ore is gradually reduced to metallic aluminum.

In the rotary kiln, the ore is heated to high temperatures, usually above 1200°C. Under the high temperature and pressure conditions of the ore, water and water of crystallization are broken down into oxygen and hydrogen, while the alumina is reduced to metallic aluminum. At the same time, the rotation in the kiln helps to mix the ore and intensify the reaction.

Features And Advantages

1、Alumina rotary kiln adopts bearing transmission, which greatly reduces electricity consumption and increases output by 50% and reduces energy consumption by 30% compared with the same grade of alumina rotary kiln.

2、Alumina rotary kiln is a kind of metallurgical chemical kiln, which can also be used in metallurgical industry for magnetization roasting of poor iron ore in iron and steel plants, oxidation roasting of chromium and nickel iron ore, roasting of high metallurgical ore in refractory plants and roasting of clinker in aluminum plants, aluminum hydroxide, and Chemical plant roasting chrome ore sand and chrome ore powder and other types of minerals.

3、The alumina rotary kiln has a sturdy structure, smooth operation and high product quality, and can provide users with vertical preheater and five-stage cyclone preheater.

4、Alumina rotary kiln is easier to operate and more reliable than traditional equipment. Compared with the same specification equipment, the operation rate has increased by 10%, the output has increased by 5%-10% and the heat consumption has been reduced by 15%.

Technical Parameter

Specification
(m)
Kiln SizePower
(kw)
Wight
(t)
Remarks
Diameter(m)Length(m)Slope(%)Capacity
(t/d)
Speed
(r/min)
Φ2.5×402.5403.51800.44-2.4455149.61
Φ2.5×502.55032000.62-1.8655187.37
Φ2.5×542.5543.52800.48-1.4555196.29Kiln decomposition kilns
Φ2.7×422.7423.53200.10-1.5255198.5------
Φ2.8×442.8443.54500.437-2.1855201.58Kiln decomposition kilns
Φ3.0×453453.55000.5-2.4775201.94------
Φ3.0×483483.57000.6-3.48100237Kiln decomposition kilns
Φ3.0×6036048000.3-2100310------
Φ3.2×503.550410000.6-3125278Kiln decomposition kilns
Φ3.3×523.3523.513000.266-2.66125283Preheating decomposition kilns
Φ3.5×543.5543.515000.55-3.4220363Preheating decomposition kilns
Φ3.6×703.6703.518000.25-1.25125419Waste heat power kilns
Φ4.0×56456423000.41-4.07315456Preheating decomposition kilns
Φ4.0×604603.525000.396-3.96315510Preheating decomposition kilns
Φ4.2×604.260427500.41-4.07375633Preheating decomposition kilns
Φ4.3×604.3603.532000.396-3.96375583Preheating decomposition kilns
Φ4.5×664.5663.540000.41-4.1560710.4Preheating decomposition kilns
Φ4.7×744.774445000.35-4630849Preheating decomposition kilns
Φ4.8×744.874450000.396-3.96630899Preheating decomposition kilns
Φ5.0×74574460000.35-4710944Preheating decomposition kilns
Φ5.6×875.68748000Max4.238001265Preheating decomposition kilns
Φ6.0×95695410000Max5950×21659Preheating decomposition kilns

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