Portland cement (often referred to as OPC, from
Portland cement clinker is a hydraulic material which shall consist of at least two-thirds by mass of calcium silicates (3 CaOSiO2 and 2 CaOSiO2), the remainder consisting of aluminium- and iron-containing clinker phases and other compounds. The ratio of CaO to SiO2 shall not be less than 2.0. The magnesium oxide content (MgO) shall not exceed 5.0% by mass.
(The last two requirements were already set out in the German Standard, which was issued in 1909)
ASTM C 150 defines Portland cement as 'hydraulic cement (cement that not only hardens by reacting with water but also forms a water-resistant product) produced by pulverizing clinkers consisting essentially of hydraulic calcium silicates, usually containing one or more of the forms of calcium sulfate as an inter ground addition.' Clinkers are nodules (diameters, 0.2-1.0 inch [5-25 mm]) of a sintered material that is produced when a raw mixture of predetermined composition is heated to high temperature. The low cost and widespread availability of the limestone, shales, and other naturally occurring materials make portland cement one of the lowest-cost materials widely used over the last century throughout the world. Concrete becomes one of the most versatile construction materials available in the world.
Cement kiln is used for making of cement clinker and there are dry and wet methods to make cement. Metallurgy chemical kiln is used in metallurgy industry and ironworks for lean iron ore, chromium ore and ferronickel ore calcimine. Rotary kiln is used for calcimine of high aluminum vandal ochre in refractory material industry; for calcimine of calotte and aluminum hydroxide in aluminum manufacturer; for claiming of chrome sand ore and chrome powder ore in chemical plant.
Lime kiln is used for baking active lime and dolomite in the steel factory and ferroalloy factory.
Stone production line : http://www.china-crusher.com/stone-production-line.html
Limestone dryer : http://www.hxjq-crushers.com/11.htm
Ore beneficiation : http://www.china-crusher.com/ore-beneficiation.html
Sand maker : http://www.hxjqcrusher.com
Impact crusher : http://www.hxjqcrusher.com/Impact-crusher.html
Concrete batching plant in Bangladesh
In 2015, we participated in the Bangladesh Construction Machinery Exhibition. This opportunity prompted us to meet the Bangladeshi agents. After the exhibition, we met again and confirmed the first 50 cubic meters of mixing plant, which was shipped and installed in the same year.
PLD1600 Four Warehouses of Concrete Batching Machine
Concrete batching machines also known as aggregate batching machine, based on ingredients of concrete mix aggregate include sand and stones, generally at least two silos through pneumatic cylinder control bunker door switch in order to achieve the effect of ingredients.
How to choose a high quality concrete batching plant
Small type concrete mixing plant concrete mixing machine is mainly used for family. And the capacity is not too much compared with the big capacity machine. So how to choose the great machine has been an important role for us to begin our business of concrete mixing plant.
Correctly install the mobile asphalt mixing plant
Mobile asphalt plant is easy to move because it is equipped with the chassis. Quick movement and installation can greatly shorten the whole construction period. Compared with stationary asphalt mixing plant, the mobile asphalt mixing plant for sale is more suitable for those small and medium-sized projects that has short construction period.
Pumping Work of Concrete Conveying Pump
Concrete conveying pump should first pump moderate water lubrication parts before starting, it also should be step by step after pumping work beginning, increase the continuity of concrete trailer pump work, notice to control pressure and temperature of the concrete conveying pump
Concrete batching plant in Philippines
For stationary concrete batching plant, we have model HZS25, HZS35, HZS50, HZS60, HZS75, HZS90, HZS120, ect. Since 2010, our concrete plant has fully entered the Philippine market, north to the Babuyan Islands and south to General Santos, west to Palawan Island and east to Caraga city.
Concrete batching plant in Central Asia
In 2013 our mixing station entered the Russian market and entered the Uzbekistan market in 2014. With the promotion of China's “One Belt, One Road” policy, markets in Central Asia such as Uzbekistan, Kazakhstan, and Turkmenistan are particularly booming, and the demand for concrete is very large.
Advantages and Features of Mobile Concrete Mixhing Plant
UQNIEU new generation mobile concrete mixing plant use of screw type twin shaft concrete mixer is second generation technical, it can save 5-8 seconds compare to the paddle type concrete mixer, and can improve 20% of the concrete produce capacity.