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Cement clinker calcium sulphoaluminate content measuring method

A technology of cement clinker and calcium sulfoaluminate, which is applied in fluid tightness testing, machine/structural component testing, measuring devices, etc. It can solve the problems of cumbersome experimental steps, environmental pollution, and high sample fineness requirements.

Active Publication Date: 2008-07-09
NANJING UNIV OF TECH
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0007] However, maleic acid-methanol and ammonium chloride-water were used as extractants to determine content, its experimental procedure is cumbersome and requires high sample fineness; the solvent reagent methanol and maleic acid used pollute the environment; in addition, due to the extraction with ammonium chloride-water solution In fact, it has been hydrated into ettringite, which affects the reliability of the data; therefore, this method has been stuck in the laboratory research stage, and no report has been applied in practice.
For the determination by X-ray quantitative method content, due to the existence of various crystal forms of calcium sulfoaluminate and the influence factors of X-ray diffraction equipment, The determination accuracy of content is not high enough; Simultaneously, due to the limitation of testing instrument equipment in the actual factory production application, adopt X-ray determination Content is not convenient enough

Method used

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  • Cement clinker calcium sulphoaluminate content measuring method
  • Cement clinker calcium sulphoaluminate content measuring method
  • Cement clinker calcium sulphoaluminate content measuring method

Examples

Experimental program
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Embodiment 1

[0062] Adopt the present invention to the content that NJLS cement factory produces Mineral Portland cement clinker The content was determined, which includes the following steps:

[0063] (1) Determination of gypsum decomposition rate:

[0064] (1) Analytical pure CaSO 4 .2H 2 O was heated in a silicon carbide rod furnace at 400°C for 4h, then sealed and placed in a desiccator for later use

[0065] (2) Connect all devices and check the airtightness of the whole system.

[0066] (3) Turn on the switch of the tubular high-temperature furnace, and set the temperature at 1150°C.

[0067] (4) After the temperature rises to 1150°C, turn on the switch of the nitrogen bottle, adjust the nitrogen pressure reducing valve to make the pressure 0.3MPa, and then adjust the micro rotor flowmeter to control the flow rate to 200ml / min.

[0068] (5) Accurately weigh 0.0209gCaSO 4 , placed in an unglazed porcelain boat.

[0069] (6) Add 250 ml of 0.5% H in the absorption bottle 2 o ...

Embodiment 2

[0107] Adopt the present invention to the content that FJGP cement factory produces Mineral Portland cement clinker The content was determined, which includes the following steps:

[0108] (1) Determination of CaSO 4 decomposition rate

[0109] Measure CaSO according to embodiment 1 method 4 Decomposition rate, a=93.09%

[0110] (2) Determination decomposition rate

[0111] Measure CaSO according to embodiment 1 method 4 Decomposition rate, b=14.19%

[0112] (3) SO in clinker 3 Assay

[0113] SO in the clinker produced by the FJGP factory measured according to the method of embodiment 1 3 Content, the results are shown in Table 2.

[0114] (4) In the clinker Assay

[0115] The determination steps are as follows:

[0116] (1) Connect all devices and check the airtightness of the whole system.

[0117] (2) Turn on the switch of the tube-type high-temperature furnace, and set the temperature at 1150°C.

[0118] (3) After the temperature rises to 1150°C, turn o...

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Abstract

The invention relates to a cement clinker component determination method in cement production, in particular to a method for determining calcium sulfoaluminate content in cement clinker, which comprises the following steps of: connecting experimental instruments such as a tubular type high-temperature furnace, a nitrogen cylinder, a tower type drier, an absorption bottle and a glass rotor flowmeter, and measuring the content of C4A3S in cement clinker according to experimental steps. The method provided by the invention has the advantages of rapid, accurate and reliable determination, simple instrument and equipment, low cost and convenient operation, and is suitable for C4A3S content determination of cement clinker in factory production, thus facilitating timely production control.

Description

technical field [0001] The invention relates to a determination method of cement clinker components in cement production, in particular to a determination method of calcium sulfoaluminate content in cement clinker. Background technique [0002] Minerals are an important component of sulphoaluminate cements, expansion agents, and active stimulators for mixed materials, so in industrial production Determination of the actual content of the sulphoaluminate cement, containing The stable production and quality control of mineral Portland cement, expansion agent and active stimulant are of great significance. [0003] For calcium sulfoaluminate (3CaO·3Al 2 o 3 ·CaSO 4 , ) content determination method, there are mainly two kinds at present, such as: extraction method (L.D.Adams and E.E.Larkin.Determination of in type Kcement and clinker using maleic acid-methanol and ammonium chloride-water as extracting agents [J]. Cement & Concrete Research, 1978, 8 (5): 539-544) and ...

Claims

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Application Information

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IPC IPC(8): G01N21/79G01M3/00G06F19/00
Inventor 沈晓冬马素花
Owner NANJING UNIV OF TECH
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