Hydrated lime production equipment

Our company has engaged in complete equipment fabrication for hydrated lime production for years. With rich experience in this field, our equipment is widely applied to metallurgy, waste water treatment, desulfurization of flue gas system, heat insulating material and etc. With big production capacity and strict management, our company has already passed the ISO9001:2000 certificate. Having set up a complete production line in our laboratory, we are able to study the the whole production process from the raw material to the finished products and adjust the production flow if needed, which helps ensure the Ca-products quality and allows the customers to provide Ca-products of all specifications to meet the market demand. The complete equipment for hydrated lime production from our company is of superior quality and competitive price, and enjoys great popularity both at home and abroad.

Hydrated lime production equipment

Professional hydrated lime production line equipment

According to the characteristics of limestone, our company create a unique limestone equipment, it can maximize the use of raw materials,and create a high quality lime, achieve the energy-saving effect.

Active Lime Process

Our company's limestone equipment have high resource utilization, production process of fine, quality of products produced higher advantages, this equipment get the of loveusers.

step1:Limestone crushing--Broke the limestone into particles

a.Process introduction: Because the limestone volume in open is too big, can't carried out to production, so it is necessary to broke the limestone, the limestone should be break into 10-50 mm particles.

b.The main raw material:limetone

step2:Average storage--Put the limestone average storage

a.Process introduction: Put the crushing limestone piled into a rectangle, each stack of equal size, and let the limestone is stored, for the next step in the process.

b.The main raw material:limestone

step3:Lime calcining--Calcination the lime,produced products

a.Process introduction: In this process, the stored limestone conveying to the rotary kiln for calcining, then send the cooked lime into a cooler for cooling, producte the qualified lime products.

b.The main raw material:lime

step4 Lime storage--Storage and loading

a.Process introduction: The calcined lime send into the repository, after bagging, transport out of factories, sales to the market.

b.The main raw material:lime

Advantages of Hydrated lime production equipment

1. Our complete equipment for hydrated lime production meets the standard of environmental protection: due to little flue gas emission, it has little effect on its surroundings.

2. The efficiency of traditional production line for hydrated lime is low: suppose 10 working hours a day, the daily capacity is at most 10tons, and large quantity supply can not be ensured. However, for our equipment BL-6 model only, its capacity is 6 tons per hour, and can work continuously for 24 hours.

3. The complete equipment for hydrated lime production is equipped with PLC control system, which helps strengthen the quality control capability, and avoid the bad effect resulted from worker change.

4. Compared with the traditional production line of hydrated lime, our equipment saves energy to about 15%, which lowers the operation cost remarkably.

Complete equipment for hydrated production line

The complete equipment for hydrated production line from our company adopts PLC control system, which performs the data processing, parameter setting, direct digital display, automatic alarm function and etc, increasing the production efficiency. World-class electric elements are used to ensure the operation safety and control system stability of the whole production line.

The complete equipment is divided into 9 systems

  • ① Crushing system: hammer crusher.
  • ② Conveying system: bucket elevator and belt conveyor.
  • ③ Slaking system: qualified CaOH is put into the first slaking device to be primarily slaked, then it proceeds to the second or third slaking device to be further and totally slaked or resolved, and then, qualified primary CaOH products come into being and the slaking rate is 98%.
  • ④ Residue discharging system: in the first level discharging process, residue with +0.5cm size in the semi-finished products are being discharged; in the second level discharging process, sand and coal dust with -0.5cm size are being discharged.
  • ⑤ Dust collecting system: this system collects the dust produced in the production, and the dust collecting rate meets the national standard (20mg/m3), therefore, secondary pollution can be avoided.
  • ⑥ Powder collecting system: powder is collected by closed circulating air.
  • ⑦ Electric control system: PLC control system and CRT screen display; the PLC system performs the data processing, parameter setting, direct digital display, automatic alarm function and etc. World-class electric elements are used to ensure the operation safety and control system stability of the whole production line.
  • ⑧ Packing system: non-weighing packing is included.
  • ⑨ Proportioning system: digital display; water and lime proportion is adjusted manually.

How Lime is Made

In the Beginning

Limestone is a naturally occurring and abundant sedimentary rock consisting of high levels of calcium and/or magnesium carbonate and/or dolomite (calcium and magnesium carbonate), along with minerals. Lime production begins by extracting limestone from quarries and mines.

Sizing . . .

Limestone enters a primary crusher to break the rock. Depending on the size of the feedstone required, limestone may go through a secondary or tertiary crusher to further reduce its size. The stone is then screened into various sizes ranging from several inches to dust-sized particles. The sized stone is then washed.

Calcining . . .

Preheating – limestone is heated by direct contact with kiln exhaust gases that enter the preheater kiln. Processed stone is transported by conveyor belt to the lime kilns. To cook or “calcine” limestone, there must be a significant transfer of heat to the limestone. In general, the heat transfer from the fuel source to limestone can be divided into two stages:

Calcining – the kiln fuel is burned in the preheated air from the cooling zone and, as the limestone moves down the kiln, the heat turns the limestone into quicklime and carbon dioxide (CO2).

Cooling – quicklime leaving the calcining zone is cooled by direct contact with “cooling air.”

While there are multiple kiln types in use, the rotary kiln is the most common kiln found in the U.S. A rotary kiln consists of a rotating cylinder that sits horizontal on an incline. Limestone is fed into the upper or "back end" of the kiln, while fuel and combustion air are fired into the lower or “front end” of the kiln. The limestone is heated as it moves down the kiln toward the lower end. As the preheated limestone moves through the kiln, it is “calcined” into lime. The lime is discharged from the kiln into a cooler where it is used to preheat the combustion air. Lime can either be sold as is or crushed to make hydrated lime.

Hydrated Lime

Quicklime can be processed into hydrated lime by crushing the quicklime, adding water to the crushed lime (water accounts for approximately 1% of raw hydrate), and then classifying the hydrated lime to ensure it meets customer specifications before it is transported.

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