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Help CenterRotary Kiln for Steel Slag Treatment 500 Tpd
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Product Introduction
The 500 TPD (Tons Per Day) Steel Slag Treatment Rotary Kiln is a specialized, heavy-duty industrial thermal equipment designed for the resource utilization and recycling of steelmaking by-products. Steel slag is a solid waste generated during the steel refining process, containing valuable minerals like calcium silicate, iron oxides, and free lime.
This 500 TPD rotary kiln system is engineered to process steel slag through high-temperature roasting, modifying, or magnetic separation pre-treatment. It plays a critical role in converting industrial waste into premium raw materials for cement manufacturing, road construction, and environmental applications, achieving high economic returns while fulfilling corporate environmental responsibilities.
Working Principle
The operation of the 500 TPD steel slag rotary kiln focuses on high-temperature phase transformation and modification of the slag material:
Material Feeding and Preheating: Crushed and pre-screened steel slag particles are continuously fed into the kiln from the higher end, known as the kiln tail. In some advanced processes, the slag may absorb heat from the counter-current flue gas before entering the main calcination zone.
Agitation and Movement: Due to the installation incline of 3.5 percent to 4 percent and the continuous slow rotation of the kiln shell, the dense steel slag moves gradually toward the lower end, which is the kiln head. The internal tumbling action ensures that the slag particles are constantly mixed, allowing for rapid and uniform heat distribution despite the high density of the material.
Thermal Modification and Reaction: High-temperature burners at the kiln head inject fuel, such as pulverized coal, natural gas, or heavy oil, creating a powerful flame zone. Inside the kiln, the steel slag is heated to temperatures between 1100 and 1300 degrees Celsius. At this stage, unstable components like free calcium oxide and free magnesium oxide are stabilized, and iron-bearing phases are aggregated, significantly improving the volume stability and grindability of the treated slag.
Slag Discharge and Cooling: The thermally modified steel slag is discharged from the lower end into a cooling system, such as a rotary cooler or a grate cooler. Rapid cooling stabilizes the desired mineral phases, preparing the treated steel slag for subsequent crushing, magnetic separation to recover scrap steel, or fine grinding for cement additives.
Product Features
Excellent Thermal Stability for High Density Materials: Since steel slag has a high specific gravity and significant thermal conductivity, the kiln shell and drive components are reinforced to handle heavy structural loads and intense thermal stress, ensuring smooth operation under demanding conditions.
Enhanced Slag Quality and Stabilization: The precise thermal profile inside the rotary kiln effectively reduces the free lime and free magnesia content in the steel slag. This eliminates the swelling and cracking risks of steel slag, making it safe and viable for high-value construction applications.
Wear Resistant and Thermal Shock Resistant Linings: The interior of the kiln is lined with specialized refractory bricks and castables that exhibit high resistance to mechanical abrasion from sharp steel slag particles and chemical erosion from basic slag compounds.
Advanced Automated Control System: Equipped with a variable frequency drive and integrated PLC control, the system monitors kiln speed, internal temperature zones, and material flow in real-time. This ensures consistent product output quality regardless of variations in the incoming slag composition.
Environmentally Friendly with Waste Heat Recovery: The sealing systems at both ends prevent cold air leakage and dust emissions. Working together with heavy-duty bag filters and desulfurization units, the system satisfies strict clean emission standards, while utilizing exhaust gases to maximize thermal efficiency.
Technical parameters
Model |
Speed (r/min) |
Inclination (%) |
Capacity (t/h) |
Gearbox Model |
Ratio |
Motor Model |
Motor Power (kW) |
Motor Speed (r/min) |
Thrust Roller Type |
Support Count |
Weight (t) |
Φ1.9/1.6x36 |
0.53-1.59 |
4 |
2.5-3 |
JZQ750-1 |
48.58 |
JZT-72-4 |
30 |
1200/400 |
Mechanical |
3 |
53 |
Φ2.1/1.8x36 |
0.5-1.51 |
4 |
4 |
UT2-110 |
163.38 |
JZS-81 |
30/10 |
1410/470 |
-- |
3 |
75 |
Φ1.2x25 |
0.5-1.6 |
3 |
-- |
PM650 |
40.17 |
JZTY71-4 |
22 |
1200/120 |
-- |
3 |
34 |
Φ1.6x32 |
0.158-0.258 |
3 |
-- |
PM750 |
48.57 |
JZJY61-4 |
15 |
1200/120 |
-- |
3 |
46.82 |
Φ1.8x45 |
0.66-1.98 |
4 |
3.5 |
UT2-110 |
163.38 |
JZS-81 |
30/10 |
1410/470 |
-- |
3 |
80 |
Φ2.2x50 |
0.125-1.25 |
3.5 |
4 |
ZS145-11 |
157 |
YCT280-4A |
30 |
1320/132 |
-- |
3 |
130.7 |
Φ2.5x50 |
0.516-1.549 |
3.5 |
5.5 |
ZS165-7 |
99.96 |
YCT355-4A |
55 |
1320/440 |
-- |
3 |
167.5 |
Φ3x48 |
0.3309-3.309 |
3.5 |
35 |
ZL130-14 |
32.11 |
ZSN4-250-21B |
90 |
1000/100 |
-- |
3 |
237 |
Φ3.2x50 |
0.398-3.975 |
3.5 |
50 |
ZL130-16 |
40.85 |
ZSN4-280-11B |
190 |
1500/150 |
-- |
3 |
263 |
Φ3.3x52 |
0.391-3.91 |
3.5 |
50 |
ZSY500-28 |
27.707 |
ZSN4-315-082 |
190 |
1000/100 |
-- |
3 |
280.8 |
Φ4x60 |
0.396-3.96 |
3.5 |
104 |
ZSY630-35.5 |
34.601 |
ZSN4-355-092 |
315 |
1000/100 |
Hydraulic |
3 |
487.5 |
Φ4.2x60 |
0.4165-4.165 |
3.5 |
116 |
ZSY710-35.5 |
35.526 |
ZSN4-355-12 |
420 |
1000/100 |
-- |
3 |
576.1 |
Φ4.3x62 |
0.398-3.98 |
3.5 |
125 |
ZSY710-35.5 |
35.714 |
ZSN4-355-12 |
420 |
1000/100 |
-- |
3 |
598.5 |
Φ4.8x74 |
0.35-4 |
4 |
208 |
JH710C-SW305-40 |
42.226 |
ZSN4-400-092 |
630 |
1500/130 |
-- |
3 |
841 |
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