Rotary Kiln

High quality Spodumene rotary kiln

The spodumene rotary kiln is a key equipment in the spodumene processing process, which is mainly used to calcine spodumene into lithium salt and other products. In the development of lithium resources, the performance of the spodumene rotary kiln plays a vital role in the quality and output of lithium products. Generally speaking, the spodumene rotary kiln is made of high-quality steel, with a diameter usually between 2.0 - 4.5 meters, a length of 40 - 120 meters, and an output that can be adjusted within the range of 50 - 1500tpd according to different specifications. In the kiln, spodumene undergoes a chemical reaction at high temperature and is converted into the desired lithium compound.

tongli heavy machinery spodumene rotary kiln main picture

TONGLI Spodumene Rotary Kiln

A MACHINE YOU CAN DEPEND ON!

Tongli's spodumene rotary kiln has a precise temperature control system and the ability to heat up quickly. It is rolled and automatically welded with carbon steel and alloy steel plates to ensure the strength of the equipment. It is suitable for raw materials of different particle sizes and is easy to operate. It uses advanced technologies such as industrial TV fire viewing and process flow simulation fluorescent screen, which is intuitive and convenient to operate.

High Adaptability

Tongli spodumene rotary kiln can process spodumene ore of different specifications and grades, with particle sizes ranging from 50mm to 210mm. It is compatible with a variety of raw materials. In addition to spodumene, it can also process bauxite and silica. Appropriate adjustments can be made to optimize the roasting effect.



Precise Temperature Control

Tongli's spodumene rotary kiln is equipped with a temperature control system. The spodumene concentrate (generally containing 4.0-7.5% lithium oxide) is roasted at 1075℃-1250℃. After cooling, the roasted ore is ground to 0.15mm and mixed with concentrated sulfuric acid and reacted at 250℃ to generate lithium sulfate. Temperature control is crucial for spodumene roasting.

High Recover Rate of Produce

The recovery rate of lithium carbonate produced by sulfuric acid method is high. The spodumene rotary kiln roasts the spodumene concentrate at high temperature, grinds it to 0.15mm after cooling, and reacts with concentrated sulfuric acid to generate lithium sulfate. The lithium sulfate is dissolved in water, and limestone is added to control the pH to above 5 to obtain a lithium sulfate solution containing about 10%. The pH is adjusted to 11 with lime, and sodium carbonate is added to remove impurities such as calcium, magnesium, iron, and aluminum.

xxxxxxxCapacity (t/h)Motor Model:Gearbox ModelInput Moisture (%)Fuel Coal Calorific Value (kcal)Output Moisture (%)
φ1.2x102.5-3M160M-6 → 7.5ZQ350Ⅱ-2525±5≥5500≤13
φ1.5x147-9Y180L-6 → 15ZQ400Ⅱ-31.525±5≥5500≤13
φ1.5x189.5-12Y180L-6 → 15ZQ400Ⅱ-31.527±5≥5500≤13
φ1.8x1412-15Y200L-6 → 18.5ZQ400Ⅱ-31.525±5≥5500≤13
φ1.8x1814-18Y200L1-6 → 18.5ZQ400Ⅱ-31.527±5≥5500≤13
φ2.0x1818-22Y200L2-6 → 22ZQ50Ⅱ-31.525±5≥5500≤13
φ2.0x2018-23Y200L2-6 → 22ZQ50Ⅱ-31.530±5≥5500≤13
φ2.2x1821-25Y200L2-6 → 22ZQ65Ⅱ-31.527±5≥5500≤13
φ2.2x2022-25Y225M-6 → 30ZQ65Ⅱ-31.530±5≥5500≤13
φ2.4x2025-29Y225M-6 → 30ZQ75Ⅱ-31.527±5≥5500≤13
φ2.4x2226-30Y225M-6 → 30ZQ75Ⅱ-31.530±5≥5500≤13
φ2.6x2028-33Y250M-6 → 37ZQ85Ⅱ-31.525±5≥5500≤13
φ2.6x2429-35Y250M-6 → 37ZQ85Ⅱ-31.530±5≥5500≤13
φ3.0x2045-50Y280S-6 → 45ZQ100Ⅱ-31.525±5≥5500≤13

FAQ

1. What is a spodumene rotary kiln?

The spodumene roasting rotary kiln is used for the transformation roasting and sulphation roasting of spodumene concentrate, and is directly heated by heavy oil or gas. During the transformation of spodumene in the spodumene roasting rotary kiln, due to the influence of local high temperature, β-type spodumene will be further converted into molten γ-type spodumene, and the molten γ-spodumene will continue to agglomerate in the rotary kiln to form large pieces of vitreous overburned spodumene.

In order to prevent large pieces of vitreous overburned spodumene from entering the downstream process and affecting production operations, a material separation grid is usually set in the discharge cover of the spodumene roasting rotary kiln to separate large pieces of sintered materials from normal materials. Normal materials pass through the material separation grid and directly enter the cooling kiln for cooling; while the separated large pieces of sintered materials are naturally cooled, crushed by the crushing equipment, and returned to the downstream fine grinding process for use.

2. What are the applications of spodumene calcining rotary kiln?

1. Lithium salt production: Calcination and extraction of useful components in spodumene for the production of various lithium salt products, such as lithium carbonate, lithium hydroxide, etc.

2. Ceramic industry: Calcinated spodumene can be used as a ceramic raw material for the production of ceramic products.

3. Glass industry: Calcinated spodumene can be used as a glass raw material for the production of various glass products.

4. Other fields: The application of spodumene calcination rotary kiln is not limited to the above fields, but can also be applied to other fields that require the extraction and utilization of useful components in spodumene.

3. What is the effect of spodumene rotary kiln on the purity of spodumene?

Spodumene rotary kiln can remove impurities in spodumene and improve purity through high temperature treatment. In addition, precise temperature control can ensure that spodumene does not introduce new impurities during the calcination process, thereby effectively improving the purity of spodumene and providing better raw materials for subsequent lithium extraction and other processes.

4. What is the energy consumption of spodumene rotary kiln?

The energy consumption of spodumene rotary kiln mainly depends on factors such as the scale of the kiln, processing capacity, combustion efficiency and thermal insulation performance. Energy consumption can be reduced by adopting advanced combustion technology, optimizing kiln structure and strengthening thermal insulation measures.

Furthermore, reasonable arrangement of production plan and improvement of equipment utilization can also reduce the energy consumption of unit product to a certain extent.

5. What aspects does the maintenance of spodumene rotary kiln include?

Regularly check the various components of the rotary kiln, including the cylinder, transmission device, support device, sealing device, etc., and promptly find and deal with problems; regularly lubricate key components such as transmission devices to ensure the normal operation of the equipment; timely clean up the accumulated materials and debris in the kiln to keep the kiln clean; regularly check the safety devices of the equipment to ensure the safe operation of the equipment.

6. What are the common problems and treatment methods that may be encountered during the use of spodumene rotary kiln?

During the use of spodumene rotary kiln, some problems are often encountered, such as raw material knotting, sintering temperature fluctuations, furnace gas rings, etc. To solve these problems, the following solutions can be taken: Raw material precipitation; check the raw materials to ensure that their moisture and particle size are within a reasonable range; adjust the proportion of ingredients to reduce the amount of each feed; add a small amount of fluidizing agent (such as alumina or aluminosilicate).

Uneven sintering temperature: Check the status of the burner and hot air furnace to ensure that the energy temperature rises evenly and the required airflow is reached; dynamically monitor the kiln wall and flue gas temperature, and make corresponding adjustments in time. Furnace ring formation.

According to the position and thickness of the ring formation, adopt the alternating hot and cold conditioning method, dynamically change the location of the coal injection pipe and the shape of the flame, so that the temperature difference at the ring formation location causes the ring formation temperature to change, and then begin to collapse.

RELATED PRODUCTS

ALL PRODUCTS

APPLICATION

Spodumene

Spodumene

Essential source of lithium, primarily used for battery production.

Clay

Clay

Used in the production of ceramics and as a refractory material.

Bauxite

Bauxite

Major raw material for aluminum extraction through refining processes.

Limestone

Limestone

A critical component in cement production and chemical processes.

Dolomite

Dolomite

Used in steel production, glassmaking, and as a refractory material.

Iron Ore

Iron Ore

Essential for producing iron and steel via high-temperature reduction.

Magnesite

Magnesite

Key material for producing magnesium oxide and refractory bricks.

Zinc Ore

Zinc Ore

Processed in rotary kilns for the extraction of zinc in industrial applications.

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