Blast slag cement
Slag cement is also called blast furnace cement, pbfc cement(Portland blast furnace cement). It is composed of Portland cement clinker, 20%-70% granulated blast furnace slag, and appropriate gypsum.AGICO CEMENT helps you get full knowledge of blast furnace slag cement and provides a
Send inquirySlag cement is also called blast furnace cement, pbfc cement(Portland blast furnace cement). It is composed of Portland cement clinker, 20%-70% granulated blast furnace slag, and appropriate gypsum.
helps you get full knowledge of blast furnace slag cement and provides a one stop solution for your cement plant.
How to Build
Recently, Slag has become an important mixing material of cement, grind ability of slag is very poor. In general, the slag powder is processed by the slag grinding plant in advance, and slag powder will be sent into the cement plant for making slag cement, so it is particularly important to select the appropriate slag grinding plant. The core equipment of slag grinding plant is vertical cement mill.
Slag cement manufacturing process can be normally divided into several steps:
Raw material crushing
raw mill
clinker calcination
clinker grinding
finished cement storage and paking
STEP1: Raw material production
The raw material is sent to the cement crusher, where it is broken or hammered into pieces.
STEP2: Raw mill
In the raw mill, the raw materials are ground finer to ensure a high-quality blend.
Vertical
mills and ball mills are applied in this stage, the vertical cement
mill uses the pressure released from the drum to grind the passing
material, and the cement ball mill relies on steel balls to grind the
material.
The raw meal is finally transported to a homogenization yard for storage and further material mixing.
STEP3: Clinker production
A high-temperature treatment system consists of three steps: drying or preheating, and calcination.
Calcination is the core part of this process. The raw meal is continuously weighed and fed into a cyclone at the top of the preheater, where the material is heated by rising hot air, and the raw material is converted into clinker at 1450°C in the rotary kiln.
The clinker enters the grate cooler from the kiln head for thermal regeneration and cooling. The cooled clinker is then transported on a conveyor to the clinker silo for storage.
STEP4: Clinker grinding
The clinker is taken from the clinker silo and sent to the feed silo, where it is proportioned and mixed with gypsum and additives before entering the clinker mill.
In the clinker grinding process, clinker is ground together with slag powder and other raw materials to a fine powder, up to 5% gypsum or additional anhydrite is added to control the setting time of the cement, along with other compounds.
STEP5: Finished cement storage and packing
Finished cement is stored in huge concrete silos.
Cement can be shipped to customers in bulk in trucks or wagons or can be bagged by cement packing machines and sent in standard trucks.
Slag cement has good water retention, good plasticity, less bleeding, and good workability.
It can inhibit the dissolution of heavy metals such as high-valent chromium in concrete.
Reducing the heat of hydration is beneficial to prevent cracks caused by the internal temperature rise of mass concrete.
More ettringite crystals are produced to compensate for the drying shrinkage caused by too much fine powder in the concrete.
reduce
the volume expansion and cracking of concrete caused by
alkali-aggregate (sand, etc.) reaction, thereby reducing the production
requirements for low-alkali cement.The addition of slag powder
can reduce the content of tricalcium aluminate and soluble calcium
hydroxide in the cement, thus reducing the volume expansion of concrete
due to sulfate attack.reduce the color of cement. The more slag
content, the lighter the color of cement and concrete, so slag cement
can be used as a substitute for expensive white cement.enhancing
the anti-penetration ability of chloride ions and forming an
anti-corrosion protective layer for steel bars, which is more suitable
for coastal defense projects.
Industry Applications
It can be used for ordinary concrete,
various high-grade concrete, high-performance concrete, and cement products to replace the amount of cement in a moderate amount to improve the durability of concrete and cement products in various harsh environments. Mixing with superfine powder such as slag improves the compactness of concrete and cement products, and its later strength is high, which reduces the cost of concrete and cement products
Applied for highways, airport runways, heavy-duty vehicle road engineering, etc.
It is used in high-strength, ultra-high-strength, high-performance concrete and prefabricated ready-mixed rods, pipes, large bridges and other industries of ordinary concrete, with high strength and smooth surface.
It is used in marine engineering, wharf, reservoir and tunnel engineering which are eroded by sea water. Basic engineering applied in various environments.
