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Control method of specific surface area of moderate heat cement

A specific surface area and control method technology, applied in the field of building materials, can solve the problem of high specific surface area, achieve the effect of improving grinding efficiency, ensuring stability, and easy control

Active Publication Date: 2013-03-13
GUANGXI YUFENG CEMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of this invention is to provide a method for controlling the specific surface area of ​​medium-heat cement, which can solve the problem of high specific surface area in the existing cement production, and can ensure sufficient cement strength

Method used

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  • Control method of specific surface area of moderate heat cement
  • Control method of specific surface area of moderate heat cement
  • Control method of specific surface area of moderate heat cement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Since the grindability of medium-heat clinker is worse than that of ordinary clinker, in order to strengthen the crushing capacity of the first warehouse, the effective length of the cylinder of the cement mill in this embodiment is 13.31 meters, and the effective length of the first warehouse is 3.78 meters. , in order to ensure the stability of the medium-heat cement quality, so that it can be fully ground in the second warehouse, the effective length of the second warehouse is set to 2.91 meters, and the effective length of the third warehouse is set to 6.62 meters; The slit width of the material grate plate is 9 mm, and the width of the slit of the discharge grate plate is 4.5 mm; 1mm wide. The grading scheme is shown in Table 1:

[0017] Table 1

[0018]

[0019] Send medium-heat cement clinker and gypsum with an average particle size of 25 mm into the cement mill for open-circuit high-fine grinding, adjust the air door of the exhaust fan to 40% opening, and t...

Embodiment 2

[0021] The effective length of the first chamber of the cylinder of the cement mill in this embodiment is 4.03 meters, the effective length of the second chamber is set to 3.16 meters, and the effective length of the third chamber is set to 6.12 meters; The slit width of the grate plate is 10mm, and the slit width of the discharge grate plate is 5mm; mm. The grading scheme is shown in Table 2:

[0022] Table 2

[0023]

[0024] Send medium-heat cement clinker and gypsum with an average particle size of 24 mm into the cement mill for open-circuit high-fine grinding, adjust the air door of the exhaust fan to 60% opening, and the output at the console is 35 tons / hour, which can be obtained Moderate heat cement with a specific surface area of ​​280 m2 / kg.

Embodiment 3

[0026] The effective length of the first chamber of the cylinder of the cement mill in this embodiment is 3.90 meters, the effective length of the second chamber is set to 3.03 meters, and the effective length of the third chamber is set to 6.37 meters; The slit width of the grate plate is 10 mm, and the slit width of the discharge grate plate is 5 mm; mm. The grading scheme is shown in Table 3:

[0027] table 3

[0028]

[0029] Send medium-heat cement clinker and gypsum with an average particle size of 24 mm into the cement mill for open-circuit high-fine grinding, adjust the air door of the exhaust fan to 50% opening, and the output at the console is 32 tons / hour, which can be obtained Moderate heat cement with a specific surface area of ​​300 m2 / kg.

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Abstract

The invention discloses a control method of specific surface area of moderate heat cement, wherein the moderate heat cement clinker with average granularity smaller than or equal to 25mm and gyp are fed into a cement mill for open fine grinding, the air exhaust of an exhaust blower at the tail of the mill is 35000m<3> / h, the aperture of the air door of the exhaust blower is adjusted to 40-60%, the output of the mill is controlled to be 28-35t / h. The barrel of the mentioned cement mill has three grinding bins formed by separation of two screening bin-separation boards, the effective lengths of the three grinding bins I, II and III are respectively 28.40%-30.28%, 21.86%-23.74%, 49.74%-45.98% of the length of the overall grinding bin, and the filling rates of the three grinding bins I, II and III are respectively 30.49%-31.85%, 28.91%-31.39% and 26.45%-28.61%. The method disclosed by the invention is in favor of the balance of strength and aquation heat of the moderate heat cement, the specific surface area of the moderate heat cement is 280-320m<2> / Kg, and the percent of pass of the moderate heat cement can achieve 90% or above, the method mentioned is easy to control and the quality of the cement is stable.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a method for controlling the physical properties of medium-heat cement. Background technique [0002] Medium-heat cement itself is not a new variety of cement. It is commonly known as dam cement and is mainly used in the construction of dams. Because medium-heat cement is large-volume concrete, it must be strictly controlled to prevent concrete cracking while ensuring the strength of cement. Heat up. In the process of producing medium-heat cement, the heat of hydration has always been the most challenging difficulty in production. At the same time, the heat of hydration is also one of the construction requirements of the manufacturer. It is required that the produced medium-heat cement not only meet the 42.5 strength grade, but also To meet the requirements of its low heat of hydration. The specific surface area of ​​cement has a great influence on the strength of ce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/52
Inventor 潘国文李宏柳卢赤宁刘鑫陆海
Owner GUANGXI YUFENG CEMENT
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