Lime Calcination Plant
Finished products: active lime
Limekiln: rotary kiln (vertical shaft kiln upon request)
Capacity: 200-1000t/d
Limestone granularity: 20-40 mm
Fuel: gas, pulverized coal
What is a lime calcination plant? A lime processing plant uses rotary kilns or vertical kilns to manufacture active lime (quick lime) for various applications in the required size and fineness. The quick lime is produced through the calcination process, which means calcining limestones (calcium carbonate). The finished products are widely used in steel, ferroalloy, construction, environmental, agriculture, chemical, and food industries.
Contact SINOMA Zibo to get your customized lime calcination plant! You can get a team of experienced technicians to help you achieve your business goals. Tailored solutions are made based on a thorough understanding of the calcination principle and the performance of calcination kilns. The configuration aims at improving production capacity while consumption reduction. Special attention is paid to the quicklime activity. Every effort is made toward avoiding inadequate burning or over-burning.
High-quality active lime
High quick lime activity
inadequate or overburning ＜5%
lime calcination plant process
The lime calcination plant process mainly contains raw material preparation, limestone calcination, cooling, crushing and screening, storage and transportation, and quality testing throughout the entire process. We pay attention to the factors that influence the calcination effect such as the limestone calcination temperature, the granularity of limestone, fuel particle size and ratio, air supply, and kiln loading. For environmental protection, a bag filter is equipped to treat the exhaust gas. Hot air at 600℃ after heat exchange enters the calcination kiln to mix and combustion with the coal gas.
- Raw material preparation: Limestone extracted from mines is transported to the production site and crushed, then selected qualified limestones are stored in silos.
- Preheating: Screened limestones are conveyed to the preheater top bunker through a bucket elevator. The material quantity is controlled by two charge level indicators and distributed evenly to the chambers of preheaters. At this stage, about 30% of the limestone is heated to about 900℃ and decomposed by the kiln flue gas at about 1150℃.
- Calcining: The limestone is pushed into the rotary kiln by a hydraulic push rod, where it is sintered and decomposed into CaO and carbon dioxide. The calcination temperature is about 900℃-1100℃. The chemical reaction: CaCO3(Limestone)→CaO (quicklime)+CO2(carbon dioxide)
- Cooling: Calcined limestone with high temperatures is sent to the coolers for cooling. It is cooled to a temperature within the safety range for easy storage and transportation.
- Crushing and screening: It is carried out depending on the requirements of finished products and the client’s demands.
- Storage: After cooling (or screening), the quick lime is transported to the storage silos by vibrating feeder, chain bucket conveyor, bucket elevator, and belt conveyor.
Rotary kilns for lime calcination
The rotary kiln is the key equipment in a limestone processing plant. Unlike vertical shaft kilns, a rotary kiln is especially good at processing super fine particles. If you are dealing with limestones from tailings, it is a must-have. It also has the advantage of large productivity with a single unit. There is no need to buy a double calcination kiln. The rotary kiln also features high product quality in important technical indicators such as the activity of calcium oxide. The quicklime activity can reach up to 400ml. Countercurrent calcination in the rotary kiln can improve the heat utilization efficiency, control the temperature more precisely to reduce inadequate or over-burning and produce more uniform active lime with higher quality due to the uniformly heating by a suitable temperature range.
Advantages
Sinoma Zibo has designed a lime production line using a rotary kiln of two-stage support with a large span and low aspect ratio. It greatly reduces the difficulty in adjusting the straightness and load of the kiln body.
A multi-point cooler is adopted for dividing the cooer into several cooling chambers, which can ensure uniform and reliable product quality.
The pulverized coal burner has four channels which brings high combustion efficiency.
Maximum use of heat consumption by using hot air generated in the cooling process to aid the combustion in the rotary kiln.
Related Equipment
Why SINOMA Zibo?
Leading suppliers in China
SINOMA Zibo is a subsidiary corporation of Tianjin Cement Industry Design And Research Institute and belongs to our mother company China National Building Materials (CNBM), a world top 500 fortune company. The background and its self-development led the company to a leading manufacturer in China.
Up-to-date technology and equipment
Over the past 30 years, the company has dedicated itself to the cement industry and made progress in aspects of technology and equipment. The company keeps absorbing advanced technology and customer requirement is put in the first place. Low efficiency and low quality are not an option if you come to us.
Strong technical team
Supported by our head office and the R&D institutes, the design of solutions is scientific and can save costs in many aspects such as equipment selection, installation, and maintenance. Productivity and quality are valued, and the carbon emission meets environmental requirements.
Turnkey solution provider
SINOMA Zibo has rich experience in offering customized one-stop solutions for customers from different industries. The integration service comprises research and analysis, design, manufacturing, installation and debugging, and after-services. We have a large number of successful cases in the cement industry.
Technical parameters of lime processing plant
| Design capacity(ud) | Products | Preheater | Specifications(m3) | Effective volume(m3) | Combustion temperature | Cooler | Fuel | Heat consumption(KJ/KGCaO) |
|---|---|---|---|---|---|---|---|---|
| 200 | CaO | Circular vertical | ⌀2.8´42 | 190 | 1350/1250 | Circular vertical | gas, pulverized coal | 5300/5000 |
| 300 | CaO | Circular vertical | ⌀3.2´50 | 292 | 1350/1250 | Circular vertical | gas, pulverized coal | 5300/5000 |
| 350 | CaO | Circular vertical | ⌀3.5´54 | 390 | 1350 | Circular vertical | gas, pulverized coal | 5225 |
| 400 | CaO | Circular vertical | ⌀3.6´56 | 430 | 1350 | Circular vertical | gas, pulverized coal | 5100 |
| 500 | CaO | Circular vertical | ⌀3.8´58 | 505 | 1350 | Circular vertical | gas, pulverized coal | 5100 |
| 600 | CaO | Circular vertical | ⌀4´60 | 575 | 1350 | Circular vertical | gas, pulverized coal | 5100 |
| 800 | CaO | Circular vertical | ⌀4.3´64 | 738 | 1350 | Circular vertical | gas, pulverized coal | 4800 |
| 1000 | CaO | Circular vertical | ⌀4.8´60 | 900 | 1350 | Circular vertical | gas, pulverized coal | 4800 |
successful cases
