Low Price Calcined Bauxite Rotary Kiln for Sale

• Customization: Available
• After-sales Service: Engineers Available to Service Machinery Overseas
• Warranty: 1years
• Application: Construction, Chemical Industry, Mineral Operation
• Certification: CE, ISO
• Customized: Customized
• Automatic Grade: Automatic
• Diameter(M): 2.5-5.6
• Length(M): 30-87
• Slope(°): 3.5-4
• Key Selling Points: Energy Saving
• Heating Method: Gas/Oil/Electric/Steam/Biomass/Coal Heating
• Machinery Test Report: Provided
• Capacity(T/D): 50-8000
• Speed(R/Min): 0.42-4.23
• Power(Kw): 55-800
• Raw Material: Limestone, Ash Slag, Alumina, Phosphate Rock, Alum
• Material: Steel, Stainless Steel
• Video Outgoing-Inspection: Provided
• Marketing Type: Ordinary Product
• Core Components: Motor, PLC
• Transport Package: Container,
• Specification: 22t-76t
• Trademark: DINGLI
• Origin: Henan, China
• Production Capacity: 20 Set/Sets Per Month
• Package Size: 200.00cm * 200.00cm * 200.00cm
• Package Gross Weight: 9000.000kg

Product Description

 

Product Description

 

<sup>Rotary kiln is a high-temperature thermal processing equipment that utilizes rotating drum technology, primarily used for the continuous heat treatment of materials. The core component of this system is a large inclined cylinder, which rotates via a precision mechanical drive system: the cylinder shell is equipped with load-bearing rollers that are supported by robust trunnion bearings and driven by a specialized transmission device. The unique design features a slight inclination of the cylinder relative to the horizontal plane, allowing gravity to facilitate the axial movement of materials inside the drum. By precisely controlling temperature profiles and material residence time, the rotary kiln effectively induces desired physical transformations or chemical reactions in the processed materials, meeting the process requirements of various industrial applications.

The rotary kiln is mainly composed of the kiln head and kiln tail sealing devices and structural cooling devices, cylinder, wheel belt and mounting plate, drive device, support wheel group and support device, transmission system, lubrication system, hydraulic wheel blocking system, tertiary fan and its air supply pipe, installation pads, equipment bottom plate, anchor bolts, special tools, electronic control devices, instruments and control devices.

Rotary kiln is a multi-purpose high-temperature processing unit capable of handling various materials through different thermal processes. Its major applications include:

1. Calcination

A thermal treatment process that induces chemical dissociation in materials, commonly used in the production of inorganic compounds.

2. Pyrolysis

Thermal decomposition of materials in an oxygen-free environment, typically conducted in indirectly heated rotary kilns for precise process control. Widely applied in recycling industries.

3. Thermal Desorption

A separation process that uses heat to volatilize and remove contaminants (e.g., pesticides) or recover valuable components from solid matrices (e.g., spent catalysts). Indirect-fired kilns are preferred for handling flammable volatiles safely.

4. Organic Combustion

High-temperature oxidation of organic waste to significantly reduce mass and volume, leaving only inert ash as residue.

5. Reduction Roasting

A metallurgical process where metal oxides in ores are reduced by carbon monoxide (CO), typically generated from coal or coke, to extract pure metals or prepare intermediates for further processing.</sup>
 

Product Application

<sup>Main application areas

Cement production: calcining limestone, clay and other raw materials to produce cement clinker, which is the core equipment of the new dry cement production line.

Lime calcination: producing active lime for steel, calcium carbide and other industries.

Oxidation pellets: processing iron ore concentrate powder, producing oxidation pellets, and improving blast furnace smelting efficiency.

Non-ferrous metal roasting: used for reduction roasting or chlorination roasting of metal oxides such as lead, zinc and copper.

Catalyst production: calcining molecular sieves, alumina and other catalyst carriers.

Solid waste treatment: incineration of hazardous waste, sludge, etc., to achieve harmlessness and resource utilization.

Garbage incineration: treating urban domestic waste through high-temperature incineration, reducing volume and recovering heat energy.</sup>

Working Principle

<sup>Structural composition
Cylinder: Made of rolled steel plate, lined with refractory material, tilted installation (usually 3%-5%), supported by supporting wheels to achieve rotation.

Transmission system: It consists of a motor, a reducer, gears and a stopper, driving the cylinder to rotate at a speed of 0.5-5r/min.

Combustion system: The kiln head is equipped with a burner, which supports a variety of fuels such as coal powder, natural gas, and fuel oil, and the combustion temperature can reach 1400-1800ºC.

Sealing and cooling: The kiln head and kiln tail adopt scale-type or labyrinth-type sealing devices to prevent air leakage; the kiln body is equipped with a cooling air jacket to protect the cylinder.

Working principle of calcining rotary kiln
The material enters from the kiln tail (high end), moves along the axial direction with the rotation of the cylinder, and goes through the stages of drying, preheating, decomposition, sintering, cooling, etc. in turn, and finally discharges the clinker at the kiln head (low end). Heat is transferred to the material through radiation, convection and conduction to achieve efficient heat exchange.</sup>

Product Advantages

<sup>1. Efficient heat exchange: The rotation of the drum makes the material fully tumble, prolongs the heat residence time, and the thermal efficiency reaches 60%-70%.
2. Continuous production: It can achieve 24-hour uninterrupted operation, and the single-line production capacity can reach 10,000 tons/day.
3. Strong adaptability: By adjusting the speed, slope and combustion parameters, it can handle materials of different particle sizes and components.
4. Environmental performance: Equipped with waste heat boilers, dust collectors and other equipment to reduce energy consumption and emissions.</sup>

Product Parameters

Model	Diameter(m)	Length(m)	Slope(°)	Capacity(t/d)	Speed(r/min)	Power(kw)	Weight(t)
Φ2.5×30	2.5	30	3.5	50	0.42-2.35	55	115
Φ2.5×36	2.5	36	3.5	100	0.5-1.54	55	132
Φ2.5×40	2.5	40	3.5	180	0.44-2.44	55	149
Φ2.5×50	2.5	50	3	200	0.62-1.86	55	187
Φ2.5×54	2.5	54	3.5	280	0.48-1.45	55	196
Φ2.7×42	2.7	42	3.5	320	0.5-1.52	55	198
Φ2.8×44	2.8	44	3.5	450	0.43-2.18	55	201
Φ3.0×45	3.0	45	3.5	500	0.5-2.47	75	202
Φ3.0×48	3.0	48	3.5	700	0.6-3.48	100	237
Φ3.0×60	3.0	60	3.5	800	0.3-2	100	310
Φ3.2×50	3.0	50	4	1000	0.6-3	125	278
Φ3.3×52	3.3	52	3.5	1300	0.26-2.66	125	283
Φ3.5×54	3.5	54	3.5	1500	0.55-3.4	220	363
Φ3.6×70	3.6	70	3.5	1800	0.25-1.25	125	419
Φ4.0×56	4.0	56	4	2300	0.41-4.07	315	456
Φ4.0×60	4.0	60	3.5	2500	0.39-3.96	315	510
Φ4.2×60	4.2	60	4	2750	0.41-4.07	375	633
Φ4.3×60	4.3	60	3.5	3200	0.39-3.96	375	583
Φ4.5×66	4.5	66	3.5	4000	0.41-4.1	560	710
Φ4.7×74	4.7	74	4	4500	0.35-4	630	849
Φ4.8×74	4.8	74	4	5000	0.39-3.96	630	899
Φ5.0×74	5.0	74	4	6000	0.35-4	710	944
Φ5.6×87	5.6	87	4	8000	max4.23	800	1265

 

^{Note: The price above is just for reference, please feel free to contact us if you want to know more about different models or production lines. We can offer free customized proposals.}

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