Brief Introduction About Calcium Oxide Calcining Plant /Limestone Calcining Process /Limestone Calcination Process

Calcium oxide usually is obtained by calcining limestone and calcium carbonate, Calcium oxide is also named as Lime, with formula as CaO, Calcium Oxide Calcining Plant or Limestone Calcining Process, Limestone Calcination Process is a combined system which generally converts the limestone(CaCO3) into lime, the Limestone calcination process needs to take in a lot of heat to break up the limestone into lime and CO2, the temperature needs to be around 1200-1350 Celsius degree, however it can take advantage of different kinds of fuels, such as coal, LPG, heavy oil, and so on. The Calcium oxide can be used for different industries, such as paper making, construction, food, and so on. Mingyuan can provide the complete solution for the Limestone Calcining Process. the main equipment mainly includes crusher, screen, rotary kiln, rotary cooler, the auxiliary equipment are dust collector, bucket elevator, ID fan.

Lime rotary kiln, also know as Limestone rotary kiln, rotary calcination kiln,which is one of the most important calcining equipment in the Calcium Oxide Calcining Plant, it`s used to calcine the limestone into quicklime or lime, the equation goes like: CaCO3=CaO+CO2, the lime is the raw material for hydrated lime production, for a quick lime Line it needs to crush the limestone into small lump ranges 10-50mm first, then feed the lump to the quicklime rotary kiln for calcining process at 1350 Celsius degree to make sure the limestone is decomposed into Calcium Oxide and carbon oxide, and it needs a cooling machine to cool the Calcium Oxide, it can use either vertical cooling machine or grate cooling machine. the rotary cooler is cooling with water and the vertical cooler is cooling with air, Then after screening process, the Calcium Oxide will be separated into lime lump and lime powder and transported to their silo respectively. And it needs to add dust collector at the top of the silo to protect the environment from pollution.

Before the lime rotary kiln, it usually needs to use a vertical preheater device to further absorb the heat from the lime rotary kiln, after heat exchange, the temperature of the limestone can reach about 700-900 Celsius degree and some amount of limestone begins to decompose into calcium oxide and carbon oxide. So the efficiency of calcium oxide production plant is highly increased by adding the vertical preheater device.

For the production capacity of lime production plant, it can be from 50 t/d to 1000 t/d, the fuel can be coal, gas, LPG, diesel, etc.

A lime rotary kiln mainly consists of drum shell, supporting roller, riding tyres, thrust roller, transmission system.

Main technical parameter of lime rotary kiln for Calcium Oxide Calcining Plant /Limestone Calcining Process /Limestone Calcination Process

Model	Capacity (T/D)	Main Motor		Main Reducer		Weight (T)
		Power	Model	Model	Speed Ratio
Ø1.9/1.6×39m	72	30	JZT2-72-4	JZQ750-I-Z	48.57	66
Ø1.9×36m	84	37	YCT315-4A	ZS110-5-III	78.19	85.9
Ø2.2×45m	98.4	55	JZT82-6	ZA125	93.93	104
Ø2.5/2.2×55m	120	40	JZT81	ZS145-10-I	134.9	197.2
Ø2.5/2.2×63m	108	40	JZT81	ZS145-10-I	134.9	170.5
Ø2.5×40m	204	40	Z2-92	ZS125-2-I	134.9	143.6
Ø2.5×45m	180	45	JZT82-4	ZS125-4-I	69.71	148
Ø2.5×50m	220	30	JZT372-4	ZS145-9-V	122.8	173
Ø3×48m	360-480	75	YCT355-48	ZS145-7-II	100.4	170.561
Ø3.1/2.5×78m	216-240	75	Z4-225-31	ZS165-2-II	57.17	267.6
Ø3.2×48m	1000	160	ZSN4-280-21B	NSY56-28-II	28	252
Ø3.2×50m	1000	160	ZSN4-280-21B	NSY56-28-II	28	263
Ø3.2×52m	1000	160	ZSN4-280-21B	NSY56-28-II	28	280.8
Ø3.3×50m	1200	160	ZSN4-280-21B	NSY450-28-V	28	317
Ø3.6×70m	492	125	Z2-112	ZS177	79.22	376
Ø3.95×80m	700	2×90	Z4-250-32B	NZS995	56	412
Ø4×50m	960	90	ZDT-11M	ZS220-3-IV	63.88	463
Ø4×60m	2500	315	ZSN4-355-09z	ZSY630-35.5-I	34.601	487.5
Ø4.2×60m	3000	420	ZSN4-355-12	ZSY710-35.5-I	35.526	576.1
Ø4.8×75m	5000	630	ZSN4-400-12	JSY-800-1760	31.5	841

Advantages of lime rotary kiln (active lime calcining equipment): for Calcium Oxide Calcining Plant /Limestone Calcining Process /Limestone Calcination Process

1. High productivity makes it possible for our lime rotary kiln to be used in large active lime production line.

2. Open-type calcining rotary kiln has a simple structure, and can discharge sulfurous gases timely, which makes it quite suitable for steelmaking.
3. It is capable of calcining 10 to 50mm fine limestone directly.
4. Vertical preheater has been equipped at the end of the kiln to make full use of high-temperature gases generated during calcining. It can preheat limestone to the decomposition

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Below is the Other equipment which may be used in the Calcium Oxide Calcining Plant /Limestone Calcining Process /Limestone Calcination Process

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