How Is Slaked Lime Made? Lime Slaking Process from Limestone to Slaked Lime

In the water treatment, construction materials, flue gas desulfurization, and metallurgy industries, slaked lime is a common material. The quality and supply efficiency of slaked lime affect the operational efficiency of the project. How is slaked lime made? We can optimize the lime slaking process to increase project capacity. We can also design a rational lime slaking process to improve the production efficiency of slaked lime. This requires an understanding of the production of slaked lime. Helping you select a highly efficient and stable lime slaking plant.

Lime Slaking Process from Limestone to Slaked Lime

This is the first step in converting quick lime to slaked lime. The quality of quick lime determines the quality of slaked lime. This process uses a vertical lime kiln or limestone rotary kiln for the calcination of limestone.

1. Raw material preparation: Before entering the calcination, the limestone needs to be processed. The purity and particle size of limestone are two factors affecting calcination efficiency. The limestone enter limestone crusher to be crushed into a particle size of 50–150 mm.

2. Calcination: Calcination is the most important step from limestone to quicklime. The processed limestone enters a vertical lime kiln or a limestone rotary kiln. Limestone has a decomposition reaction at a temperature of 900–1100℃. Limestone is converted into quicklime. You can choose the most suitable kiln types according to your needs.

3. Finished product processing: Calcined quicklime must be cooled to ensure reactivity. The reactivity of quicklime affects the efficiency of lime slaking. Then, the quicklime is sent into a storage tank for storage.

Key Equipment: limestone crusher, vertical lime kiln, limestone rotary kiln.

Quicklime from a quicklime plant, the lime slaking reaction with water takes place within the lime slaking plant. This ultimately produces calcium hydroxide, also known as slaked lime. This process is the most important step in converting quicklime to slaked lime. This process determines the quality of the slaked lime.

1. Material feeding: The calcined quicklime must be fed into a lime slaker system. To ensure the continuity of feeding, we usually use a bucket elevator conveyor, a vibrating feeder, and a screw conveyor machine. Stable feeding ensures the efficiency of slaked lime production.

2. Lime slaking: This is the key step of the entire process. This step takes place within a professional lime slaker system. Quicklime and water undergo a chemical reaction here. It is the process of converting quicklime into slaked lime. Eventually forming a lime slurry.

3. Dust removal: Dust is generated during the lime slaking process. So choosing efficient dust removal equipment is important. The dust collection equipment commonly used in lime slaking includes baghouse dust collectors and industrial cyclone dust collectors. The collected dust can also be recycled.

Key Equipment: Bucket elevator conveyor, vibrating feeder, lime slaker system, screw conveyor machine, baghouse dust collector.

The Core Equipment for Slaked Lime Production

The core equipment for slaked lime production is the lime slaker system. The most commonly used types are the detention slaker, paste slaker, and ball mill slaker. They have different production efficiency, operating costs, and application scenarios.

1. Detention Slaker: Detention Slaker is the most widely used type of lime slaking system. It is a simple structure and stable operation. Quicklime and water are thoroughly mixed within the equipment, undergoing a slaking reaction. Undigested particles were separated out.

2. Paste Slaker: The paste slaker is used to produce high-concentration lime slurry. It controls the water and quicklime ratio, slaking quicklime under low-moisture conditions. Finally, a high-concentration lime slurry is formed. Paste slaker is suitable for use in flue gas desulfurization.

2. Ball Mill Slaker: Ball mill slaker can grind and digest. It is divided into horizontal and vertical. It is suitable for application scenarios requiring high fineness. Grinding media (steel balls) were added during the digestion process. Complete lime slaking during the grinding process.

Factors Affecting Lime Slaking Quality

Quicklime quality: Chemical properties of quicklime is the important factors affecting digestion. High-activity quicklime has fast reaction speed. Both over-burnt and under-burnt quicklime will affect the lime slaking process. So you should choose high-activity, low-impurity quicklime.
Water quicklime ratio: Insufficient water will result in an incomplete reaction. Too much water will result in an excessively high concentration of lime slurry. We recommend using an automated water supply system. It can intelligent adjustment.
Reaction temperature: Lime slaking is an exothermic reaction. Low temperatures will result in a slow reaction rate. High temperatures will cause caking. We recommend using a lime slaker system equipped with an automatic control system.
Mixing intensity: Thorough mixing is the core condition for ensuring complete digestion. Insufficient mixing results in uneven contact between water and lime. Excessive agitation can lead to increased energy consumption and equipment wear.

How to Build a Lime Slaking Plant

After understanding the lime slaking process from limestone to slaked lime. Whether you intend to build a new lime slaking plant or upgrade an existing production line, the process will be easy. Through this article, you have understood the lime slaking process and core equipment. The construction of a lime slaking plant includes site selection, process design, equipment selection, trial production, and other stages. You can choose an experienced supplier to help you provide complete solutions.

Summarize

The lime slaking process from limestone to slaked lime. Every stage affects the quality of the product. Only through the proper control of the lime slaking reaction can efficient and stable production of slaked lime be achieved. Whether in water treatment, flue gas desulfurization, or the chemical industry, slaked lime is indispensable.

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