1000 tons of active lime production line equipment

We, Jiangsu Pengfei Group Co., Ltd supply complete equipments for active lime production line with capacity below 1200 ton per day. The active lime is widely used in steel production, Al2O3 production, Metal Mg production, calcium carbide and Power plant desulfurization paper production area. Active lime is an important auxiliary material in steel making industry. The using of active lime enhances the quality and capacity and lower down the loss and cost. It also stabilizes the operation. As proved in production, the using of active lime in steel making industry is very profitable. Recently years, the capacity of steel industry used lime increased by 40%. High quality lime with activity above 300ml increased from 27% to 29.5%. 

1.Steelmaking practice certified that, the active lime can improve the desulfurization and dephosphorization efficiency of 80%, and shorten the smelting time. It can be completely take reaction with acidic substances in the molten steel in 3-5 minutes.The lime reaction time of shaft kiln need 6-10 minutes at least.And it also improve furnace ridge above 40%. The furnace burden consumption is reduced to 5-8Kg/t steel,calculated in 10000000tons,savings annual about 15000000,production efficiency is significant.
2.Desulfurization and dephosphorization efficiency of active lime is obviously improved,the average S removal rate of steel is 34.5% ,especially for high S iron (S ≥ 0.06%), efficiency is more obvious, and the S removal agent consumption can be reduced by about 45%.
3.Steelmaking with active lime,iron material consumption can be reduced by 5-15Kg/t steel,than non-active lime.And it also can reduce the steel splash and adhesion on oxygen lance;sticky mouth;flue sticking phenomenon.
4.Lime consumption decreased: steelmaking with active lime, the consumption can reduce 20~25Kg/t steel,compared with non-active lime.And if use non-active lime,consumption is more than 65~70Kg,if use active lime, is 40~41.5Kg/t steel.
5.Steelmaking with active lime,slagging is fast,desulfurization, dephosphorization ability is significant, the production efficiency can be improved by 5%~10%. 6.Quality requirement of the active lime limestone:CaO≥52% SiO2≮2.0% MgO≮1.5% 

Active lime rotary kiln system process matching table 

specification	Φ2.5×40	φ2.8x42	Φ3x46	Φ3.2x50	φ3.2x54	φ3.6x56	φ3.8x58	Φ4x60	Φ4.3x58	Φ4.3x64	Φ4.8x68
volume(m3)	142	190	235	292	390	430	505	575	670	738	1005
burning temperature0C	1350/ 1250	1350/ 1250	1350/ 1250	1350/ 1250	1350	1350	1350	1350	1350	1350	1350
capacity(t/d)	150	200	250	300	350	400	500	600	750	800	1000

Vertical preheater

Vertical preheater is one of the main active lime equipment, the main effect of vertical preheater is the limestone material sent to the preheater, and use high temperature exhaust gas from the kiln calcining out emissions(1150 degrees Celsius), the material in the preheater evenly heated to about 900 degrees Celsius.In the preheating process of 30%CaCO3 is under preheater decomposition, and then by the hydraulic push rod into the rotary kiln calcination, calcination process that not only makes the limestone calcination time in the kiln is greatly shortened, obtain higher activities of lime.
Vertical preheater system mainly consists of six parts.
1. Feeding system: mainly including the upper house, the discharge pipe, the materials and structure that can guarantee the body feeding safety sealed in preheater, so that the outside of cold air cannot enter into preheater inside, and material feeding can use stick valve to achieve continuous or intermittent feeding.

2. Preheater: it is the most important part of ensuring the material preheated to 900 degrees Celsius, which is composed of a preheating chamber, a suspension device and a refractory lining (this does not belong to the scope of equipment design and manufacturing) and other parts. This part of the structure is mostly metal component material selection, part of the heat-resistant steel according to the needs, working at 1000~1100 degrees Celsius high temperature heat-resistant steel. In addition, the refractory lining structure has the advantages of novel design, good sealing performance, can ensure material in preheater evenly preheated and achieve preheating temperature.

3. The pushing device: mainly including pusher, frame and the connecting rod part, pusher heat-resistant steel casting or welding to become, can withstand high temperatures, with the help of electric and hydraulic system, the hydraulic push rod can be automatic control procedures followed by pushing.
4. Hydraulic system: mainly comprises an oil tank, pump, motor, electromagnetic valve, hydraulic tubing, his main role is to control the pushing device, complete the pushing action.

5. Charging room: mainly including the chute feeding chamber, charging spout, body, its main function is to the material into the rotary kiln preheated calcined within.

6. Framework: It includes columns, ring beams , the main role is to carry the upper structure of the preheater

NO.	Equipment name	Specification	Type		Qty
1	rotary kiln	Ф4.0×60m			1
2	vertical preheater	Ф10.5×8.5m			1
3	vertical cooler	105m⒊	4.2*9m		1
4	multi pipe cooling machine	dealing air：260000m3/h			1
5	High temperature exhaust fan	900kw，10KV			1
6	coal mill system	8-10t/h	PDM1250		1
7	gas&coal burning system		four way burner		1
8	dust collector equipment
8.1	kiln tail flue dust collector	dealing air ：260000m3/h		LCMD-3660	1
8.2	coal grinding dust collector	dealing air：45000m3/h		FGM128-6(M)	1
8.3	cooling dust collector	dealing air：18600m3/h		PPc64-4	1
8.4	finished product screening dust collector	dealing air：18600m3/h		PPc64-4	1
9	accessory equipment
9.1	bucket elevator		NE100		1
9.2	Circular vibrating screen		YA1536		1
9.2	Circular vibrating screen		YA1236		1
9.4	chain scraper conveyor		DS500		1
9.5	belt conveyor				6
10	fan
10.1	axial flow fan				4
10.2	centrifugal fan				2
10.3	coal mill fan				1
10.4	roots fan				3

Technical 

host performance		300t/d	600t/d	800t/d	1000t/d	1200t/d	1500t/d
preheater	Type	Low wear vertical warehouse compartment	Low wear vertical warehouse compartment	Low wear vertical warehouse compartment	Low wear vertical warehouse compartment	Low wear vertical warehouse compartment	Low wear vertical warehouse compartment
	Shape	Type 6 edges	Type 12 edges	Type 12 edges	Type 18 edges	Type 20 edges	Type 22 edges
	Preheating warehouse number	6	12	12	18	20	22
	hydraulic push rod number	6	12	12	18	20	22
	preheating amount(t)	1200	1200	1600	2000	2400	3000
Rotary kiln	Specification	Φ3.2×50m	Φ4×60m	Φ4.8×56m	Φ5.0×58m	Φ5.2×64m	Φ5.6×76m
	Slope	3.5%	3.5%	3.5%	3.5%	3.5%	3.5%
	Rotary speed(r/min)	0.3-1.8	0.3-1.8	0.3-1.8	0.3-1.8	0.3-1.8	0.3-1.8
	Burning temperature(℃)	1350	1350	1350	1350	1350	1350
cooler	Type	Partition upright	Partition upright	Partition upright	Partition upright	Partition upright	Partition upright
	Temperature controlling zone number	3	3	4	4	4	4
	Air tower number	2+1	4+1	4+1	4+1	4+1	4+1
	Specification(m)	3.6×3.6	4.1×4.1	4.7×4.7	5.2×5.2	5.4×5.4	5.8×5.8
	Discharging temperature(℃)	≤80	≤80	≤80	≤80	≤80	≤80
Product heat consumption(KJ/kg)		5400	5400	5000	4750	4600	4500
Adaptable fuel		coke oven gas, mixed gas, natural gas, pulverized coal, low-heat value gas

JIANGSU PENGFEI GROUP CO.,LTD.