A 300 TPD gypsum powder production plant is a medium-scale continuous processing system designed for stable raw material handling, crushing, optional calcination, grinding, classification, dust collection, finished-powder storage and packing. The final process route depends on whether the plant produces ground natural gypsum powder or calcined gypsum powder for construction gypsum, gypsum plaster, Plaster of Paris, gypsum board materials and related applications.

At 300 TPD, process coordination becomes especially important. The crusher, calcination equipment when required, grinding mill, classifier, dust collector, conveyor system, storage bins and packing section must be matched as one complete line. A high-capacity mill alone cannot maintain plant output if the material supply, calcination discharge, product storage or packing section is not sized correctly.

Understanding a 300 TPD Plant

300 TPD means a nominal output of 300 tonnes of finished gypsum powder per day. The average hourly production requirement depends on the planned number of operating hours. The same 300 TPD target requires different hourly equipment capacity when the plant operates for 12, 16, 20 or 24 hours per day.

These values are average finished-product rates. Actual equipment selection should also consider raw gypsum properties, target powder fineness, maintenance time, process losses, storage capacity, seasonal moisture variation and operating flexibility.

Two Process Options

A 300 TPD gypsum powder plant can be configured in two main ways. The correct option depends on the final product requirement.

The calcination stage is optional from the equipment-layout perspective, but it is essential when the final product requires calcined gypsum. A grinding-only line produces ground natural gypsum powder. It does not replace the thermal conversion needed for many plaster and board-related products.

Complete Process Flow

A medium-scale 300 TPD gypsum powder production plant typically includes the following process sections:

1. Raw gypsum receiving and storage

2. Material feeding and feed-size preparation

3. Crushing and screening where required

4. Crushed gypsum storage and controlled discharge

5. Calcination when the required product is calcined gypsum

6. Cooling, conveying and intermediate storage after calcination

7. Grinding to the required powder fineness

8. Classification and circulation of coarse material

9. Dust collection and controlled airflow

10. Finished powder conveying and silo storage

11. Bagging, bulk loading or downstream process feeding

The overall objective is to create continuous material flow. Every section should be capable of supplying or receiving material at the rate required by the next section. Buffer storage is particularly important at this scale because it helps separate short-term fluctuations between crushing, calcination, grinding and packing.

Raw Gypsum Receiving and Storage

A 300 TPD plant requires reliable raw material supply and sufficient storage capacity. Raw gypsum may be supplied as natural gypsum rock, industrial gypsum or another gypsum-bearing material. Before entering the process, the material should be checked for size, free moisture, impurities, storage condition and flow behavior.

Raw material storage should be sized according to delivery frequency, planned operating schedule and material availability. A stable supply of raw gypsum reduces the risk of interruptions in crushing, calcination and grinding. The receiving area should also allow removal of oversized rocks, metal fragments and other foreign materials before they reach process equipment.

Raw Material Data for Plant Design

• Source and type of gypsum raw material.

• Maximum lump size and particle-size distribution.

• Free moisture content and expected seasonal variation.

• Gypsum composition and impurity level.

• Clay, soil, metal and other foreign material content.

• Required finished gypsum powder type.

• Target powder fineness and particle-size distribution.

• Required daily output and planned operating hours.

• Finished-product storage and packing requirements.

Crushing and Feed Preparation

The crushing section reduces raw gypsum to a size suitable for calcination equipment or the grinding mill. At 300 TPD, crushing capacity should exceed the average downstream demand enough to maintain stable production during normal operating variation and scheduled material handling.

A typical crushing section includes a receiving hopper, feeder, crusher, conveyor, screen, magnetic separator and crushed-material storage bin. The crusher discharge size should be matched to the selected calcination system or grinding equipment.

Consistent crusher output helps stabilize the full production line. Large variations in feed size can affect material movement in the calcination section, mill loading, classification performance and finished powder consistency.

Calcination Section for 300 TPD Production

When the plant produces calcined gypsum powder, a calcination section is installed between crushing and grinding. Natural gypsum is mainly calcium sulfate dihydrate, CaSO₄·2H₂O. During controlled heating, part of the chemically combined water is removed, producing calcined gypsum that commonly includes calcium sulfate hemihydrate, CaSO₄·½H₂O.

At 300 TPD, the calcination stage should provide stable continuous output. The system must be matched to raw material moisture, feed size, intended product condition and the required downstream grinding capacity. Any significant variation in calcination discharge can affect mill feed, powder fineness and finished-product storage.

Rotary Kiln Process

A rotary kiln can be integrated into a medium-scale calcination and grinding line. The kiln is a rotating, slightly inclined cylindrical vessel. Crushed gypsum enters at the feed end and moves gradually toward the discharge end while receiving controlled heat.

As the shell rotates, the gypsum is lifted, rolled and moved forward. This movement supports heat exposure throughout the material bed. The feed rate, kiln rotation, slope, material moisture, feed size and thermal condition influence material residence time and calcination stability.

At the kiln discharge end, calcined gypsum is transferred to cooling equipment, enclosed conveyors or intermediate storage. The downstream grinding system should receive a stable material supply from this section.

Calcination Control Points

Cooling, Conveying and Intermediate Storage

After calcination, gypsum must be cooled or transferred to the grinding system in a controlled manner. At 300 TPD, the connection between calcination and grinding is a key part of plant stability. The material-transfer system should avoid unnecessary moisture exposure, reduce dust leakage and provide steady feed to the mill.

Cooling equipment, enclosed conveyors, bucket elevators, screw conveyors, transfer chutes and storage bins can be used according to the plant layout and material condition. Intermediate storage acts as a buffer. It allows the grinding system to continue operating during minor fluctuations in calcination discharge and supports smoother material flow through the plant.

The bin and hopper design should account for the flow behavior of calcined gypsum. Material accumulation or bridging can interrupt mill feeding. Stable discharge equipment and proper transfer-point design help reduce these risks.

Grinding Equipment for a 300 TPD Plant

The grinding system should be selected based on the actual hourly output, required powder fineness, raw material or calcined material condition and final application. A 300 TPD plant generally requires continuous material handling and coordinated operation between mill feed, grinding, classification, dust collection and finished-powder storage.

MTW European Grinding Mill

An MTW European grinding mill can be considered for conventional industrial gypsum powder production with a broad range of fineness requirements. It can be used for natural gypsum grinding or for final grinding after calcination.

For a 300 TPD project, the mill system should include stable feeding, classification, air handling, dust collection, powder conveying and sufficient finished-product storage. The actual arrangement depends on the target hourly output and final powder requirement.

LM Vertical Grinding Mill

An LM vertical grinding mill can be considered for a 300 TPD gypsum powder plant requiring stable continuous operation and integrated system design. It is suitable for larger material flows where crushing, calcination when required, intermediate storage, grinding, classification and powder transport need to operate as one coordinated process.

The mill should receive stable material from the upstream storage section. The classifier, air system, dust collector and finished-product handling equipment should be matched to the LM vertical grinding mill output to avoid bottlenecks.

LUM Ultrafine Vertical Mill

A LUM ultrafine vertical mill can be considered when the 300 TPD project requires finer gypsum powder and closer particle-size control. It is suitable for applications where the finished product requires a finer grade than conventional gypsum powder.

Fine powder production requires close coordination between the grinding zone and classifier. Qualified particles are collected as finished product, while coarse particles return for additional grinding. This circulation must be controlled carefully at higher material flow rates.

R Raymond Mill

An R Raymond mill can be considered for specific 300 TPD plant arrangements where the overall production capacity is divided among multiple lines or where the actual hourly grinding requirement and target fineness fall within its suitable operating range. The final selection should be based on the required process capacity, operating schedule and material condition rather than daily output alone.

Classification and Powder Control

Classification controls the particle size of the finished gypsum powder. After grinding, the classifier separates particles that meet the required fineness from larger particles that need further grinding. Coarse material returns to the mill, while qualified powder moves to collection and finished-product storage.

At 300 TPD, classification capacity must be matched to the grinding flow. If the classifier is undersized or poorly adjusted, the finished powder may become inconsistent, the circulating load may increase and the production rate may decrease.

Dust Collection and Air Handling

Dust collection is required throughout a 300 TPD gypsum powder plant. Fine particles are generated during crushing, calcination, cooling, grinding, classification, conveying and packing. The dust collection system helps recover useful powder, maintain controlled pressure and reduce dust escape at transfer points.

At this scale, the air system should be designed as part of the complete process. The dust collector, fans, ducts, filters, hoods and equipment seals should all be matched to the total air volume and dust load. In the grinding section, airflow also affects powder transport and classification.

Air leakage, filter resistance, damaged seals or inadequate fan performance can affect both dust collection and powder quality. The condition of the air system should be monitored together with mill output and classifier performance.

Finished Powder Storage and Packing

After classification, gypsum powder is collected and transferred to finished-product silos. At 300 TPD, sufficient storage is important because it separates powder production from packing and delivery operations. The silo capacity should be selected according to the mill output, packing rate, truck loading schedule and planned production buffer.

Finished powder can be packed in bags, transferred to bulk-loading equipment or supplied directly to a downstream mixing or board-production process. The packing system should be selected according to the delivery form and should have enough capacity to prevent the finished-product silo from becoming a bottleneck.

Typical 300 TPD Equipment Configuration

Plant Layout Priorities

A 300 TPD gypsum powder plant should be laid out around continuous material flow and maintenance access. Raw gypsum should move from receiving to crushing, then to calcination or grinding, without unnecessary transfers. Finished powder should move from collection to storage and packing in a separate, controlled route.

At this scale, buffer storage between major sections is important. Raw gypsum storage buffers deliveries. Crushed gypsum storage stabilizes feed to calcination or grinding. Intermediate storage after calcination stabilizes mill feed. Finished-product silos separate powder production from packing and dispatch.

• Provide adequate raw gypsum storage for the planned delivery cycle.

• Use a crushed-material buffer between the crusher and the next stage.

• Include intermediate storage after calcination when producing calcined gypsum.

• Arrange mills, classifiers and dust collectors with sufficient maintenance access.

• Use enclosed conveyors and sealed transfer points where practical.

• Provide finished-product storage that matches packing and bulk-loading capacity.

• Consider building height for mills, elevators, silos, classifiers and dust collection equipment.

• Keep raw material handling and finished-product dispatch routes clearly separated.

Key Design Checklist

1. Confirm whether the plant will produce natural gypsum powder or calcined gypsum powder.

2. Define the required 300 TPD output and planned daily operating hours.

3. Calculate the required average hourly finished-powder production rate.

4. Check raw gypsum size, moisture, impurities and supply stability.

5. Size receiving, storage and crushing equipment for stable material supply.

6. Include a calcination system when the final product requires calcined gypsum.

7. Provide cooling, conveying and intermediate storage after calcination.

8. Select grinding equipment based on capacity, target fineness and material condition.

9. Match classifier, dust collection, conveyors and finished-product silos to the mill output.

10. Ensure packing or bulk-loading capacity matches finished powder production.

11. Confirm site area, building height, power supply, fuel condition and maintenance access.

Conclusion

A 300 TPD gypsum powder production plant requires a complete and coordinated process solution. The plant can operate as a grinding-only line for natural gypsum powder or as a calcination and grinding line for construction gypsum, plaster, Plaster of Paris, gypsum board powder and other calcined gypsum products.

Stable production depends on the balance between raw material receiving, crushing, calcination when required, cooling, intermediate storage, grinding, classification, dust collection, finished-product storage and packing. MTW European grinding mills, LM vertical grinding mills, LUM ultrafine vertical mills and selected R Raymond mill configurations can be matched to different capacity, fineness and application requirements within a 300 TPD gypsum powder project.