Block Making Machine in Egypt: Output Per Two-Shift Year

A block making machine in Egypt is usually bought to run two shifts, not one, because housing demand is large and the aggregate that feeds the line, crushed limestone, is widely available in bulk. That single fact changes the arithmetic behind every specification. The number that matters is not the hourly output claimed in a brochure, it is the annual tonnage the line can place after you subtract mould changes, maintenance and the hours lost to a mixer that cannot keep pace. This guide works through the two-shift capacity and power conversion, the desert sand problem, and the mixer choice that decides whether the cycle time you paid for is the cycle time you actually get.

1. Two-shift capacity conversion for a block making machine in Egypt

The first calculation is hourly output to annual output. A QT5-15 runs a forming cycle of 15 to 20 seconds on a 1,100 × 650 × 20 mm pallet. A QST1200 runs 15 to 25 seconds on a 1,350 × 880 × 25 mm pallet and reaches up to 120,960 standard bricks in an 8 hour shift. At 250 working days and two shifts, that is about 500 shifts a year. Multiply the per-shift figure by 500 and you get the ceiling, then discount it for mould changes, curing yard space and the two hours a week the line sits while the mixer catches up.

Put block size into the same calculation: a hollow block and a solid brick do not leave the machine at the same rate. A 400 x 200 x 200 mm hollow block needs a full mould charge and a slow demould, so a line that makes 120,960 standard bricks per shift makes far fewer large hollow units. Plan the order book around the size you sell most, then size the curing yard for that number, not for the theoretical brick count. If your market is load bearing hollow block for housing, the pallet count and the yard area become the bottleneck before the press does.

2. Power consumption per shift and per year

Electricity is the running cost you can predict, so convert it properly. The QT5-15 draws a total of 37.4 kW, and a complete line with mixer, batching and conveyors commonly carries 60 to 90 kW installed. Run the host for an 8 hour shift at 37.4 kW and you consume about 299 kWh before the mixer is switched on; two shifts double that, and 500 shifts a year multiply it again. Do this with your own tariff and shift pattern, and ask us to confirm the voltage, the phase and the frequency your site supplies, because the motor package is built on that answer.

Two choices save most of the bill without touching the machine. Size the mixer to the forming cycle so the press never waits with the hopper empty, because a machine idling between batches still burns power on hydraulics and vibration. Then keep the curing yard close to the moulding hall, since every extra metre of forklift travel is diesel or battery charge you pay on every pallet, and a two-shift plant moves twice the pallets.

3. Desert sand, washing and the 400 x 200 x 200 mm block

Sand from desert sources is usually fine graded and carries a high fines and mud content, and that is the largest single technical risk on an Egyptian block line. A mix built on unwashed, over-fine sand demands more water to reach workability, and more water means lower green strength, a slower demould and a weaker finished block. Wash the sand, or blend a coarse crushed fraction with the fine desert material until the gradation curve is continuous, then re-check the water to cement ratio. For semi-dry block production, hold that ratio near 0.42 to 0.50 and treat any extra water as a strength loss, not a convenience.

The 400 x 200 x 200 mm hollow block makes the effect easy to see. With a 31.5 MPa rated pressure and a consistent, washed gradation, the block reaches its target apparent density and its 28 day strength together, and a compaction force of 58 kN on a QT5-15 or 150 kN on a QST1200 is enough for that section. Add water to fix a stiff mix and the density drops first, then the 28 day strength follows, even when the block still looks sound on the pallet. Check the first ten pieces of every batch for weight and dimensions, and keep them damp through the first 7 days of the 28 day cure.

4. Match a forced twin-shaft mixer to the block machine

A block plant needs a forced twin-shaft mixer, not a drum mixer, and the reason is the mix itself. Semi-dry block concrete is stiff and low in water, so a gravity drum tumbles it without shearing the cement into the sand, and it builds balls and dead zones in the corners. A forced twin-shaft mixer drives two counter-rotating shafts whose blades shear every particle against the trough, so a stiff mix reaches uniform colour and moisture in seconds. In the QS-1200 series, the JS500, JS750, JS1000 and JS1500 cover discharge capacities of 500, 750, 1,000 and 1,500 litres, productivity of 25, 35, 50 and 75 m³/h, and total power of 25.5, 39.35, 50.2 and 75 kW.

Size the mixer by cycle volume, not by plant capacity on paper. Count the mould charges per hour, multiply by their volume, and add a margin so the mixer is never the constraint. The JS750 and JS1000 are the usual pairing for a single QST1200 line running two shifts, and the JS1500 suits a plant feeding two presses or a wet cast line. Match the maximum aggregate size as well: the QS-1200 series accepts pebble up to 80 mm and crushed stone up to 60 mm, which suits the crushed limestone dominant in Egypt.

5. Shipping and installation for a block making machine in Egypt

A machine that is 11,500 mm long does not enter a 40 foot container as one piece. The main frame, the mixer, the batching hopper, the pallet feeder and the stacker ship as separate crated sections, and site assembly from arrival to first saleable block is usually 7 to 15 days including commissioning. That timing is set by two things you control: whether the foundation was poured before the container was booked, and whether the crane and forklift needed at the port and at your yard were confirmed in writing. Confirm both, plus the water source and the aggregate storage bay, before anything ships.

6. What we confirm before quoting a block making machine for Egypt

We do not size a line from a country name alone. The answers below turn a quotation into a configuration. The same list applies whether the plant sits in Cairo, Alexandria or a desert site far from either, and skipping it is what makes a schedule pay later.

• Power available on site: installed load in kW, phase and frequency, confirmed against the host motor and the mixer motors.
• Block sizes and strengths: which thicknesses you sell, and the strength class your buyers test.
• Aggregate: the sand gradation and mud content, whether you can wash it, and the crushed limestone size available locally.
• Water and cement: the mixing water source and the cement type, so the mix design matches what is on the ground.
• Yard and unloading: the foundation pad, the curing area, and the crane or forklift capacity at the port and at your site.