Views: 0 Author: Site Editor Publish Time: 2026-09-24 Origin: Site
People rarely build a dry mortar plant because they love machines. They build one because orders are coming in and the current setup cannot keep up. That was the starting point of the project in these photos: a building materials producer in Jiaozhou, Shandong, decided to build a dry mortar line designed for 300,000 tons a year.
This is a short account of that project — the decision, the layout, the build, and three things other first-time buyers can take away from it.
Dry mortar lines come in three shapes: tower, ladder and workshop. That sounds like a catalogue question, but in a real project the site usually makes the choice for you.
A tower type dry mortar production line stacks silos, weighing and the mixer vertically and lets material fall by gravity. It is compact and cheap to run, but it needs height, a strong foundation and a lot of civil work — and once the frame is up, expanding it is hard.
A workshop type dry mortar production line is the cheapest and fastest to start, but it lives inside a building and its capacity tops out around 70 t/h.
A ladder type dry mortar production line — the layout used here — puts the equipment on layered steel platforms. Three things pushed this project that way:
Height limits. A ladder line is far shorter than a tower of the same capacity. That matters on sites with clearance restrictions, high-voltage lines nearby, or neighbours close to the fence.
Land. It is the trade-off: a ladder line needs noticeably more ground than a tower. It makes sense where land is available and affordable.
Room to grow. Extra silos, a packing machine, a palletiser, another additive bin — on a ladder line these are added on the existing platforms without touching the main steel structure.
It is worth being honest about the price of that choice: a ladder line uses more horizontal conveying equipment, so installed motor power is higher and long-term electricity cost is a little higher than on a tower. Every layout buys something and pays for something. The right answer is the one that fits where you are building.
Part of the finished plant: the sand silo and the bucket elevator that lifts material to the top of the line.
The photo above is one small corner of the plant. The whole process runs like this:
Sand is dried first. Dry mortar needs aggregate moisture of roughly 0.5% or less, or you get caking and weak batches.
Dried sand is lifted, screened and split into several particle sizes, then stored in separate silos.
Sand and cementitious materials are weighed separately, each to the formula.
Additives get their own high-precision scales. The dosage is tiny — thousandths of the mix — so it cannot share a scale with the sand.
Everything meets in the mixer. A twin-shaft mixer with high-speed fly-cutters is what lets one line switch between ordinary mortar and special mortars such as tile adhesive or wall putty.
The product leaves in bags or in bulk. Most plants do both, because they serve very different customers.
The line runs enclosed, with pulse dust collectors at the dust points rather than a single filter somewhere at the end.
Civil works and steel structure. For a ladder line this is where the character of the project is fixed: how high each platform sits and how material moves between them.
Equipment erection. Silos, elevators, the main tower equipment, piping and platforms.
Electrical and control. The PLC system that stores formulas, weighs in sequence and records each batch.
Commissioning. Single-machine testing, then linked running, then trial production with real material.
Two things are easy to underestimate at this stage, and the customer then lives with both for years: the layout of the maintenance access platforms, and the routing of the dust collection ducts. On a ladder layout, both are much easier to reach than on a tower — which is exactly why the layout choice keeps paying back after the project is handed over.
With two shifts a day and around 300 production days a year, 300,000 tons works out to roughly 1,000 tons a day. That is not a brochure number. It is what allows a producer to sign supply contracts for a whole region instead of chasing individual construction sites.
Capacity is not the only thing that grows, either. A line like this can run ordinary masonry and plastering mortar at volume during the week, then switch to a special mortar when the market pays better for it. That flexibility — more than the headline tonnage — is usually what pays the investment back.
Decide your products before your equipment. Ordinary mortar and special mortar need different mixing and dosing. Buy after you know what you are selling.
Choose the layout with your site conditions, not with the price list. Height, land and expansion room decide more than a difference in equipment price.
Plan expansion and maintenance access on day one. Adding a silo or a packing line later is simple on a ladder layout and painful on a tower — as long as the platforms were designed with that in mind.
We are Qingdao Zhongqinglin Heavy Industry. We design and build dry mortar lines in tower, ladder and workshop layouts, from around 50,000 to 500,000 tons a year, together with manufactured sand plants and the drying systems that feed them.
If you are planning a project, send us three things: what you plan to sell, the capacity you need, and your site conditions — land size, clear height and available power. We will come back with a layout proposal that fits the site rather than the other way round.
Contact us for a free layout proposal for your project.