New Type of Lime Kiln Tendency

Due to the temptation of 20% growth of lime demand for calcium carbide, steel industry, a lot of kilns are put into use in the market. But the production technology and product quality can't meet the need of modern production; the activity degree of product is low, mild and excessive calcination cannot be controlled give rise to fuel consumption and serious environmental pollution.

As a result,the new environmental protection lime kilnis sure to replace the original old lime kiln.

Xinxiang Great Wall lime kiln advantage

Rotary kiln mainly consist of feeding system preheating calcination system, cooling system, finished product storage systems, exhaust gas treatment system,pulverized coal preparation system and air compressor system.

01activity is higher than the traditional shaft kiln 30ml

The material heated evenly in the revolving lime kiln, the probability of mild and excessive calcination is low. The lime activity degrees produce by lime rotary kiln is higher than the shaft kiln.

02Production capacity reach up to 1500 t/d

The lime kilns produced by Great Wall Machinery have large capacity, the output can reach to 1500t/d, operating well to guarantee enterprise up-scaling and reduce the production cost.

03Gas fuel, energy saving and environmental protection

Great Wall lime kiln belongs to open type calcine equipment, advanced manufacturing technique，lower energy consumption than the old lime kiln calcine system, more environmental protection for adopts the exhaust blast furnace gas.

04Auto-control reduce the labor cost

Auto-control by using DCS remote control system, only need 2-3 operating personnel in the whole line.

05Good quality of finished products, low probability of mild and excessive calcination

Product quality is uniform, the probability of mild and excessive calcination less than 8%.

Comparison of Lime Kilns on The Market

	Great Wall kilns	shaft kilns	earth kilns
Capacity (t/d)	200-1200	50-300	10-70
Raw material granularity	15-50mm	40-80mm	70-250mm
Standard coal consumption	≧180kg/t	120-145kg/t	200-300kg/t
Lime activity	330-400ml(he influence of fuel ash and sulfur content increase on lime activity is not obvious)	260-300ml(he increase of fuel ash and sulfur content significantly reduce lime activity)	200-240ml(he increase of fuel ash and sulfur content significantly reduce lime activity)
Ignition loss	less than 5%	about 10%	20%

Active Lime Production Line System

Great Wall Machinery can supply 200-1500t/d active lime production line EPC, the one stop "turnkey" service that provide from scientific reports, design, equipment, construction, installation, commissioning, reach production targets. Welcome customers to call us:+86-371-55019608.

working principle

Qualified limestone particles(20-50mm) be ascended by the hoist and transported into stock bin at the top of the preheater. Stock bin feeding amount be controlled by the up and down two material level meters. Material distributed by tremie pipe to all indoor in preheater. The limestone was heated to about 900℃ by kiln flue gas with temperature in 1150℃ in preheater, about 30% was decomposed and pushed by the hydraulic rod into the rotary kiln. The limestone was decomposed into CaO and CO2 and discharged out of the cooler after cooled to below 100℃ by blowing cold air. The hot air with temperature in 600℃ after the heat exchange enter into the kiln and mixed firing with coal gas.

Related equipment

vertical preheater

Function:	exchange limestone’s heat and decompose 30% calcium carbonate
Three major components:	1. the upper feeding system, 2 .the preheater body, 3. hydraulic pusher device
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rotary kiln

Function:	ecompose the remainder
The main structure:	1.kiln body; 2. Supporting roller; 3. Gear ring; 4. Tire 5. Transmission device
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vertical cooler

Function:	Cool the finished products and recycle heat
The main structure:	the main cooler grate bars and discharge device, the lower cooling air chamber, supporting device
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elevator

Purpose:	Vertical lifting limestone material in powder
Structure:	part of machine, central chassis, the lower part, chain and dosing machine
Role:	Dosing machine (belt batching scales) on the one hand to measure the flow of materials, on the other hand to convey the material at preset speed from out of the hopper
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constant feed weigher

Structure:	belt conveyors consist of conveyor belt, roller, roller and drive unit, brakes, tensioning device, loading, unloading, cleaning and other devices
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belt conveyor

Function:	The material preheated evenly to 900 degrees, 30% CaCO3 was decomposed in the preheating process, and then pushed by hydraulic push rod into rotary kiln
Parameters:	Specifications: RS-6.5 × 3.4 Fader: 6
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Technical Parameters

CAPACITY(t/d)		200	300	400	600	800	1000
PRODUCTS(t/d)		active lime	active lime	active lime	active lime	active lime	active lime
PREHEATER	specification	RS-6.5×3.4	RS-6.5×3.4	RS-6.5×3.4	RS-6.5×3.4	RS-6.5×3.4	RS-6.5×3.4
PREHEATER	pushrod number	6	8	10	12	16	18
ROTARY KILN	specification	Φ2.8×42M	Φ3.3×50M	Φ3.6×56M	Φ4×60M	Φ4.3×66M	Φ4.8×68M
	effective volume(m³)	190	292	430	575	738	1005
	rotate speed(r/min)	0.45-2.22	0.2-1.9	0.22-1.57	0.48-1.57	0.21-1.57	0.19-1.98
COOLER	specification	LS-3×3	LS-3.6×3.6	LS-3.8×3.8	LS-4.1×4.1	LS-4.7×4.7	LS-5.2×5.2
	feed temperature	1100±50℃	1100±50℃	1100±50℃	1100±50℃	1100±50℃	1100±50℃
	discharge temperature	＜100℃	＜100℃	＜100℃	＜100℃	＜100℃	＜100℃
SYSTEM THERMAL CONSUMPTION(kj/kg lime)		5200	5200	5100	5000	5000	5000
ACTIVITY DEGREE (50g,4NHCL,10MIN)		≥360ML	≥360ML	≥360ML	≥360ML	≥360ML	≥360ML

Address	Mengzhuang Town, Huixian City, Henan Province, China
Zip Code	453600
Telephone	86-371-55019878
WhatsApp	+8613071023171
Fax	86-371-55019608
E-mail	vip@chaeng.co
Skype	GreatWall1958