Lithium carbonate Rotary Kiln

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Rotary kiln for lithium carbonate

Capacity: 200-800t/d

Fuel: coal, heavy oil, or natural gas

Application: chemical industry.

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The lithium carbonate rotary kiln is a new type of calcination equipment that incorporates advanced technologies and process designs into the traditional rotary kiln. It has gained popularity among users in the market.

The lithium carbonate production process involves mixing, calcination, cooling, and crushing of lithium mica as the raw material. AGICO has been dedicated to the research of lithium carbonate rotary kilns for years, studying various common issues associated with this rotary kiln. It has effectively addressed problems such as ring formation, low production yield, and high energy consumption in lithium carbonate rotary kilns.

About lithium carbonate

Lithium carbonate is an inorganic compound that exists as colorless monoclinic crystals or white powder. Its chemical formula is Li2CO3. It is soluble in dilute acids and slightly soluble in water, with higher solubility in cold water compared to hot water. It is insoluble in alcohols and acetone. Lithium carbonate finds wide applications in ceramic production, pharmaceuticals, catalysts, and as a raw material for the preparation of lithium-ion batteries.

Lithium carbonate


AGICO CEMENT is a rotary kiln supplier dedicated to rotary kiln design and customization service, we can offer rotary kiln used in cement, lime, activated carbon, gypsum board, chemicals, waste solid, etc. Based on more than 20 years of experience, our rotary kiln technology is well-known by clients from many countries and regions, we have built 100+ rotary kiln projects in Uzbekistan, Malaysia, India, south America, etc. If you have any problems of rotary kiln and kiln parts, welcome to contact us!

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our service

1. Raw Material Test

2. Program Design

3. Device Manufacturing

4. installation

5. debugging

6. Technical Training

7. delivery on time

8. after-sales service

our highlights
  • High output, apply for large-scale production line
  • Rotary kiln belongs to an open-type calcination process. The kiln structure is simple, allowing smooth airflow and timely discharge of sulfur-containing flue gas. The sulfur in the fuel does not easily adhere, resulting in low sulfur content in the product, which meets the requirements for steelmaking. At the same time, the materials inside the kiln roll and advance uniformly, receiving even heat distribution, ensuring stable product quality, and achieving low rates of under- and over-burning.
  • Vertical preheater is installed at the kiln tail to fully utilize the high-temperature flue gas generated during calcination in the rotary kiln. It preheats the ore from room temperature to the initial decomposition state. This not only greatly improves the output of the rotary kiln but also significantly reduces the unit product heat consumption.
  • A vertical cooler is installed at the kiln head, which rapidly cools the high-temperature materials, enhances product activity, and facilitates transportation and storage. It also allows for the introduction of secondary air at a higher temperature into the kiln, effectively raising the firing temperature inside the kiln and reducing fuel consumption.
  • The exhaust gas discharged from the vertical preheater at the kiln tail has a low temperature, ranging from 280 to 350 degrees Celsius, and a low dust content of about 20g/Nm3. This simplifies and makes the subsequent exhaust gas treatment more effective, enabling compliance with environmental requirements.
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working principle of lithium carbonate rotary kiln

The spodumene concentrate is manually transported from the concentrate storage to the bucket elevator and lifted to the concentrate warehouse. Then, it is fed into the rotary kiln tail by a disc feeder and a screw feeder, along with lithium carbonate. In the kiln tail preheating section, the high-temperature gas is used to dry the concentrate. The concentrate undergoes a phase transformation calcination at a temperature of about 1200°C in the calcination section, converting from α-spodumene (monoclinic crystal system, density 3150 kg/m3) to β-spodumene (tetragonal crystal system, density 2400 kg/m3), also known as calcine, with a conversion rate of approximately 98%.

The calcine is discharged from the rotary kiln head after cooling in the cooling section. It is then naturally cooled and ground to a particle size of below 0.074mm with a cement ball mill, with over 90% of particles meeting this size requirement. The calcine is then transported to the tailings warehouse of the acid roasting process. It is fed into the acid mix tank by a feeder and a spiral conveyor, where it is mixed uniformly with concentrated sulfuric acid (at least 93%) in a specific ratio (the amount of concentrated sulfuric acid is calculated based on a 35% excess lithium equivalent in the calcine, approximately 0.21 tons of concentrated sulfuric acid required per ton of calcine). After thorough mixing, the mixture is added to the acid roasting chamber. The closed acid roasting process takes place at a temperature of 250-300°C for 30-60 minutes. During this process, the β-spodumene in the calcine reacts with the sulfuric acid, and the hydrogen ions in the acid replace the lithium ions in the β-spodumene, forming soluble lithium sulfate (Li2SO4) in the material, resulting in acid-roasted product (acid-roasted spodumene).

ceramsite rotary kiln

specification of Lithium carbonate rotary kiln

SizeCapacity(t/d)Number of supportsReducerMotorPower(kW)

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