High temperature calcining cement clinker strength can be improved

High temperature calcination and rapid cooling are important measures to improve the quality of cement clinker, in this paper, we talk about the high temperature for calcining what important influence on the quality of cement clinker
When the calcination temperature from 1350 ℃ to 1400 ℃ and 1425 ℃ respectively, 3 d, 7 d and 28 d compressive strength from 236 MPa, 413 MPa and 413 MPaMPa were increased to 272 MPa, 440 MPa, 579 MPa and 414 MPa, 592 MPa, 592 MPa

An alkali content of cement limestone is a bit high, to reduce the calcination temperature and improve some performance of cement, mixed with 1% sulfuric acid residue in the limestone, clinker SO3 in rose 02%, a 012% increase in the content of MgO style, the results of clinker heat consumption decreased 80 kj/Kg, kiln cylinder surface temperature drop 19 ℃, yield increased by 14 t/h, but the intensity of 7 d is decreased by 07 MPa, 28 d intensity fell by 35 MPa This shows that calcination temperature decreased, the strength has gone down

Why high temperature calcination can increase clinker strength? Liming heavy industry experts are analyzed

1 The high temperature calcination can raise the content of the silicate minerals in the clinker, increase the content of A mine High calcination temperature can burn SM higher material and silicate mineral content increased, so also can improve the content of A mine Mainly the following response: in the process of clinker burning C2S + CAO – > C3S Mine is A solid solution A few Fe2O3, Al2O3 and MgO style C3S Calcination temperature increase can promote the reaction, reduce the F – increase the C3S CAO As you can see on type, reduced by 1 per mole CAO can increase 1 mole C3S If the meter by weight, each 1% reduction in F – CAO, can increase 407% C3S
2 High temperature calcination can improve the activity of A and B mineral water hard Calcination temperature is high, in addition to related to A mine content, may also be related to the activity of A and B ore increase Study shows that the calcination temperature increase, A mine from M to M Ⅲ Ⅰ type transformation M type Ⅲ early hydration slower, but after 3 d slurry density, strength increased When the calcination temperature increased from 1400 ℃ to 1400 ℃, C3S 3 d, 7 d and 14 d and 28 d compressive strength from 130 MPa, 183 MPa, 256 MPa, 300 MPa to 325 MPa, respectively 523 MPa, 523 MPa and 523 MPa Thus, calcination temperature on the strength of the C3S effect is obvious Calcination temperature from 1400 ℃ to 1400 ℃, strength increasing obviously, the 3 d, 7 d, 14 d and 28 d compressive strength from 08 MPa, 17 MPa, 22 MPa and 65 MPa to 18 MPa, 46 MPa, 102 MPa and 308 MPa
3 The high temperature calcination can reduce contains the actual content of aluminum phase, thus reducing its water consumption standard consistency, improve its adaptability with water reducing agent Calcination temperature increase besides can reduce birth underburnt clinker or light underburnt clinker, still can make the liquid viscosity, iron phase can dissolve into more Al2O3, make the iron phase transformation from C4AF to C6A2F, thereby reducing C3A content C3A content of reducing water consumption can reduce cement standard consistency, and improve its adaptability with water reducing agent

Henan Liming Heavy Industry Science and Technology Co, LTD Is engaged in the mining machine research production more than 30 years, the production of crusher, grinding machine, sand making machine, mobile crushing station, cement production line, mineral processing production line, and many other devices, warmly welcome new and old customers to click on the consultation, to choose and buy

Product Categories : High temperature calcining