Raw Material Mill | XingQing Machinery

Product OverviewProduct Overview

Raw Material Mill, also known as raw meal mill, is an important grinding equipment in cement production, widely used in building materials, metallurgy, power and chemical industries for grinding (drying and grinding combined) cement raw materials and other materials. Raw meal enters the tube mill after crushing and is ground into fine powder through the movement andextrusion of steel balls. This series saves 35~50% investment compared to traditional equipment at the same scale, meeting raw material supply for 250~2500 t/d cement lines. Drive types: edge drive and center drive, flexibly selectable based on site conditions and capacity scale.

Working PrincipleWorking Principle

1

Feed

Crushed raw material (size <25mm) is continuously fed into the mill cylinder through the feeding device. The cylinder is pre-loaded with steel grinding balls at a certain ratio.

2

Lifting

The cylinder rotates at set speed (15~22 r/min). Steel balls are carried upward by the cylinder wall under centrifugal force and liner friction.

3

Impact & Grinding

Steel balls fall under gravity after reaching a certain height, causing impact crushing of material. Meanwhile, sliding and rolling between balls produce grinding action, gradually fine-grinding the material.

4

Discharge

Fine-ground material is discharged through the discharge device. Hot air can be simultaneously introduced for combined drying and grinding, with finished fineness of 80μm sieve residue 12~15%.

Power Transmission Path

Motor → Main reducer → Pinion → Girth gear → Cylinder → Liner → Grinding media → Material

Technical ParametersTechnical Parameters

Specs (m)	Output (t/h)	Cylinder Speed (r/min)	Feed Size (mm)	Ball Charge (t)	Effective Volume (m³)	Drive Type	Main Motor / Power	Main Reducer	Weight (t)
Φ2.2×6.5	10–12	21.4	<25	25	21.3	Edge Drive	JRQ15–8/380	ZD70	52.8
Φ2.2×7.5	12–14	21.4	<25	29	25.7	Edge Drive	JR630–8/380	ZD70	56
Φ2.2×9.5	14–16	21.4	<25	39	31.5	Edge Drive	JR1510–8/450	ZD70	70
Φ2.2×11	16–18	21.4	<25	47	36.3	Edge Drive	JR560–8/630	ZD80	79
Φ2.4×10	17–18	20.57	<25	50	39.1	Edge Drive	JR1512–8/630	CZD80	94.7
Φ2.4×11	19–21	20.57	<25	51.5	43.3	Edge Drive	JR1512–8/630	CZD80	99.2
Φ2.4×13	21–23	20.3	<25	65	51.7	Edge Drive	YR800–8/1180/800	MBY710	116
Φ2.6×11	24–26	19.57	<25	65	50.3	Edge Drive	YR800–8/1180/800	MBY710	131
Φ2.6×13	28–32	19.61	<25	75	60	Edge Drive	YR1000–8/1180/1000	JDX800	149
Φ2.6×13	28–32	19.5	<25	75	60	Center Drive	YR1000–8/1180/1000	MBY100-00F	150.5
Φ3×9	28–32	18.34	≤20	78	55.1	Edge Drive	YR1000–8/1180/1000	JDX800	139
Φ3×11	30–35	18.08	≤20	95	69.3	Edge Drive	YR1250–8/1430/1250	JDX900	143.5
Φ3×12	32–35	18.08	≤20	100	72.63	Edge Drive	YR1250–8/1430/1250	JDX900	168
Φ3×13	33–37	18.08	≤20	108	80.9	Edge Drive	YR1250–8/1430/1250	JDX900	172.3
Φ3.2×13	45–50	17.8	≤20	128	92.4	Edge Drive	YR1600–8/1430/1600	JDX1000	218
Φ3.4×8.5	52–58	17	<25	100	75	Edge Drive	YR1250–8/1430/1250	JDX1000	206
Φ3.5×11	55–60	16.5	<20	152	95	Center Drive	YR2000–10/1730/2000	BJ2240	241
Φ3.8×12	110	16.6	<25	175	23.6	Center Drive	YRKK800–8/2500	JQS2500	203
Φ3.8×13	66	16.4	<25	195	29.3	Center Drive	YR2500–8/1730/2500	MYFX250	286
Φ4×13	90–95	15.5	<25	235	155	Dual Edge Drive	YR173–49–10/2×1000	ZD150	376
Φ4.2×13	85	15.6	<25	240	157	Center Drive	YRKK1000–8/3550	JQS3500	254.6

※ Technical parameters subject to change without notice. Φ3.8×12 marked as closed-circuit output. Φ4.2×13 weight excludes drive unit.

Structure ComponentsStructure Components

Component	Function	Material / Features
Cylinder	Core rotating component with large length-to-diameter ratio (tube mill structure), carrying grinding media and material	Steel Plate Welded, Combined Liner Inside
Feed Device	Continuously feeds crushed raw material into the cylinder; hot air can be introduced simultaneously	Feed End Hollow Shaft + Screw Feeder
Discharge Device	Discharges ground finished product; coarse particles are intercepted by the partition plate and returned for further grinding	Discharge End Hollow Shaft + Streamlined Design
Grinding Media	Steel balls impact and grind the material as they fall inside the cylinder	Forged Steel Balls, Multi-stage Grading
Drive System	Drives the cylinder rotation, available in edge drive and center drive types	Motor + Main Reducer + Large & Small Gears
Liners and Partition Plate	Protects the cylinder; different liner structures are used at different stages to improve grinding efficiency	High Manganese Steel / Alloy Steel, Modular Design
Main Bearing	Supports smooth cylinder rotation, bearing radial loads	Plain Bearing, Forced Lubrication Cooling

Product FeaturesProduct Features

High Grinding Efficiency

Single-compartment structure with modular liner design uses differentiated liner configurations for different stages inside the mill, significantly improving grinding efficiency.

High Output

Large end cover and discharge system feature streamlined design, reducing ventilation resistance, increasing effective volume, enabling smooth discharge and greatly improving mill output.

Economical Investment

35~50% lower investment than traditional equipment at the same scale, suitable for cement plants with limited capital to start production quickly, with short payback period.

Combined Drying and Grinding

Hot air can be simultaneously introduced for drying. Raw materials with high moisture can be fed directly into the mill without pre-drying, simplifying the process flow.

Flexible Drive Configuration

Small to medium specs use edge drive (simple structure, easy maintenance); large specs use center drive (smooth transmission, low noise).

Strong Adaptability

Suitable for various cement raw materials including limestone, clay, iron powder, bauxite, etc. Feed size up to 25mm with controllable finished fineness.

Reliable Operation

Heavy-duty welded cylinder + alloy steel bearings. Key components designed for long service life, suitable for 24-hour continuous operation in cement production lines.

Application FieldsApplication Fields

Cement Industry

Core raw meal preparation equipment in cement production lines. Mixes and grinds limestone, clay, iron powder and other raw materials to specified fineness before feeding to the rotary kiln for calcination.

Building Materials Industry

Grinding and processing of raw materials for silicate products, new building materials, refractory materials, etc. Uniform finished particle size meets downstream production requirements.

Power Industry

Preparation of desulfurization limestone powder for thermal power plants. Limestone is ground to below 80μm for flue gas desulfurization, improving desulfurization efficiency.

Metallurgy and Chemical

Grinding of industrial raw materials including bauxite, active lime, aluminum hydroxide, slag, etc. Combined with classification equipment for precise fineness control.

Limestone Cement Clinker Clay Bauxite Active Lime Slag Aluminum Hydroxide Sandstone Iron Powder

Selection AdviceSelection Advice

Capacity matching: For 250 t/d cement line, recommend Φ2.2×6.5; for 1000 t/d, recommend Φ3×11~Φ3.2×13; for 2500 t/d, recommend Φ3.8×13 and above.
Drive type selection: For specs below Φ3.2m, recommend edge drive (low investment, easy maintenance); for Φ3.5m and above, recommend center drive (smooth transmission, low noise, suitable for continuous heavy load).
Drying requirements: When comprehensive raw material moisture >5%, equip hot air furnace using kiln tail exhaust waste heat to achieve combined drying and grinding, reducing system energy consumption.
Open vs closed circuit: Closed circuit system with classifier allows flexible fineness adjustment and reduces over-grinding, suitable for high fineness raw meal preparation. Open circuit system has simple flow, suitable for small to medium scale.