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Method for rapidly determining ash content of paper filled with porous calcium silicate

A porous calcium silicate and rapid determination technology, which is applied in the direction of weighing by removing certain components, can solve the problems of incomplete combustion of organic matter in paper, large temperature fluctuations, and needs, etc., to shorten the measurement time of ash content and the heating time long-term, accurate effect

Active Publication Date: 2015-06-24
SHAANXI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the standard method for measuring the ash content of paper is to measure the ash content by burning the paper sample through a muffle furnace at 525°C or 900°C and then weighing the residue. However, the traditional muffle furnace uses resistance wire heating. The heating process is slow, the ashing time and energy cost are high, and the gas will be emitted during the working process to pollute the working environment. At the same time, the muffle furnace has uneven temperature distribution in the furnace, low temperature near the furnace mouth, large temperature fluctuations, and large temperature deviations. Problem: X-ray diffraction analysis can be used to accurately analyze paper elements, but this instrument is expensive, requires temperature control, and humidity control, and is not suitable for laboratory environments; paper is cut into strips of a certain size and then burned in the air It is a fast and fast method for the rapid determination of paper ash, but it cannot completely burn the organic matter in the paper by this method, and the stability of the measured data is poor, and the environmental factors are greatly affected

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  • Method for rapidly determining ash content of paper filled with porous calcium silicate
  • Method for rapidly determining ash content of paper filled with porous calcium silicate
  • Method for rapidly determining ash content of paper filled with porous calcium silicate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Porous calcium silicate filled electrostatic copy paper (quantitative 70g / m 2 ), take 0.5g of calcium silicate filled electrostatic copy paper and cut it into a number of paper strips with a length of 150mm and a width of 10mm, then overlap the paper strips and roll them into a cylindrical paper pattern along the length direction, with the gap between each layer being 1-5mm , after weighing the cylindrical paper sample and the burning device for placing the cylindrical paper sample with an analytical balance (0.0001g), put the cylindrical paper sample into the burning bracket 3 in the burning device, and ignite the cylindrical paper sample with a butane spray gun And ignite at high temperature for 3 minutes. After the residue is completely smoldering, cool in the air for 20 seconds, then place it in a desiccator for 3 minutes, then weigh it on an analytical balance, and finally obtain its ash value by calculation. Repeat several times. Calculate the average. Standard a...

Embodiment 2

[0051] Porous calcium silicate laboratory handsheet paper (quantitative 70g / m 2 ), take 0.5g of porous calcium silicate laboratory hand-sheet paper and cut it into a number of paper strips with a length of 100mm and a width of 5mm. ~5mm, use an analytical balance (0.0001g) to weigh the weight of the cylindrical paper sample and the combustion device used to place the cylindrical paper sample, put the cylindrical paper sample into the combustion bracket 3 in the combustion device, and use a butane spray gun to ignite the cylinder After the residue is completely smoldering, it is cooled in the air for 10 seconds and then placed in a desiccator for 2 minutes, then weighed on an analytical balance, and finally the ash value is obtained by calculation, and repeated several times Calculate the average value afterwards. Standard ash and rapid determination of ash are shown in Table 2.

[0052] Table 2

[0053]

Embodiment 3

[0055] Porous calcium silicate laboratory handsheet paper (quantitative 65g / m 2 ), take 0.5g of porous calcium silicate laboratory hand-sheet paper and cut it into a number of paper strips with a length of 200mm and a width of 15mm. ~5mm, use an analytical balance (0.0001g) to weigh the weight of the cylindrical paper sample and the combustion device used to place the cylindrical paper sample, put the cylindrical paper sample into the combustion bracket 3 in the combustion device, and use a butane spray gun to ignite the cylinder After the residue is completely smoldering, it is cooled in the air for 30 seconds and placed in a desiccator for 6 minutes, then weighed on an analytical balance, and finally the ash value is obtained by calculation, and repeated several times Calculate the average value afterwards. Standard ash and rapid determination of ash are shown in Table 3.

[0056] table 3

[0057]

[0058]

[0059] The present invention is carried out according to t...

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Abstract

The invention discloses a method for rapidly determining the ash content of paper filled with porous calcium silicate. The method comprises the following steps: firstly cutting the paper filled with porous calcium silicate into a plurality of paper slips in the same size and then enabling the paper slips to overlap each other and then rolling the paper slips into a cylindrical paper pattern along the length direction; then weighing the cylindrical paper pattern and a combustion apparatus used for placing the cylindrical paper pattern; then putting the cylindrical paper pattern in the combustion apparatus, igniting the cylindrical paper pattern by adopting a butane spray gun and combusting the cylindrical paper pattern, then putting the combustion apparatus in a dryer to be cooled after cooling the combustion apparatus in the air for a certain time and weighing the combustion apparatus after cooling; finally computing the ash content of the paper filled with porous calcium silicate via a formula. The method is high in ash content determination speed and accurate in data and can absolutely meet the requirement of rapid determination of the ash content of the paper in production and scientific research.

Description

technical field [0001] The invention relates to a technique for measuring the ash content of paper, in particular to a method for quickly measuring the ash content of porous calcium silicate filled paper. Background technique [0002] Porous calcium silicate is a by-product produced in the process of extracting alumina from solid waste fly ash in thermal power plants. Adding porous calcium silicate filler in paper making can significantly improve the air permeability and bulk of paper. However, excessive addition of calcium silicate will sacrifice the strength of paper, so rapid detection of calcium silicate content in paper during papermaking is of great significance for improving paper performance. [0003] At present, the standard method for measuring the ash content of paper is to measure the ash content by burning the paper sample through a muffle furnace at 525°C or 900°C and then weighing the residue. However, the traditional muffle furnace uses resistance wire heatin...

Claims

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Application Information

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IPC IPC(8): G01N5/04
Inventor 张美云李钦宇宋顺喜李琳
Owner SHAANXI UNIV OF SCI & TECH
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