Recently, on the one hand, most of the domestic mine crushing and industrial sand making plants produce a large amount of limestone powder waste (high content of limestone powder) in the production process, which not only pollutes the environment but also wastes raw materials, so how to turn waste limestone waste into treasure is important. On the other hand, domestic researches show that the use of limestone powder as admixture in concrete has the effect of improving concrete structure, enhancing concrete workability, and improving the resistance of concrete to sulfate attack at low temperatures.
ZENITH can provide you with a total solution for the limestone powder preparation system. As a manufacturer of grinding equipment, ZENITH has established hundreds of limestone grinding production lines in more than 120 countries and regions.
ZENITH can provide you with a total solution for the limestone powder preparation system. As a manufacturer of grinding equipment, ZENITH has established hundreds of limestone grinding production lines in more than 120 countries and regions.
According to the new JGJ/T 318-2014 Limestone Powder in Concrete Application Technical Specifications, GB 50164 Concrete Quality Control Standards and other national and industrial standards, limestone powder fineness, activity index, fluidity ratio, water content, Calcium carbonate content, MB value and stability should meet the requirements of the following table.
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Limestone Powder
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Technical Indicators
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|
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Calcium carbonate content (%)
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≥75
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|
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Residue(≥45μm )(%)
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≤15
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Activity index (%)
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7d
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≥60
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28d
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|
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Liquidity ratio (%)
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≥100
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Water content (%)
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≤1.0
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MB value
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≤1.4
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The asphalt mixing plant generally uses limestone powder within 180 to 200 mesh to improve the adhesion of the asphalt to the aggregate.
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Limestone Powder
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Technical Indicators
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||
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The apparent density is not greater than (t/m3)
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2.5
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2.45
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Water content is not more than (%)
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1
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1
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Appearance
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No agglomeration and no agglomeration
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|
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Water coefficient
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≤1
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Size range
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<0.6mm
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100
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100
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<0.15mm
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90-100
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90-100
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<0.075mm
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75-100
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75-100
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ZENITH can provide reasonable equipment according to customers' special requirements.
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Equipment
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Investment
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Energy consumption
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Land occupation
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Maintenance
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Ball mill
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High
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High
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Large
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High cost
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Traditional Raymond mill
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High
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High
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Large
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High cost
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European Mill System
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Low
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Low
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Small
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Low cost
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MTW Trapezium Mill is designed for pulverizing minerals into 80-425mesh of particles.
Input Size: 0-50mm
Capacity: 3-50 tons / hour
Applicable materials: silica, feldspar, calcite, talcum, limestone, dolomite, barite, gypsum, bentonite, fluorite, clay, etc.
Online Chat Inquiry1. Under the same output, the investment amount is only one-half of the ball mill, and the floor space is only equivalent to one-third of the 4R Raymond mill.
2. A dust collector used. The dust removal efficiency is above 99%.
3. A water flushing system used. After rinsing, the sewage is clarified and discharged into the wastewater ditch.
4. Low noise. The grinding rollers don’t contact with the grinding ring, so the machine vibration is small and the noise is low.
Input size: 200mm
Output size: 250mesh
Moisture: less than 7%
Equipment: 6 sets of MTM160 Trapezium Grinding Mills with each capacity 13-15 tons per hour
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Material: Limestone
Input size: 40mm
Output size: 325 mesh
Equipment: 2 sets of MTW215 Grinding Mill
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