CN104777070A - Method using microwave muffle furnace to rapidly measure ash content of paper filled with porous calcium silicate - Google Patents
Method using microwave muffle furnace to rapidly measure ash content of paper filled with porous calcium silicate Download PDFInfo
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- CN104777070A CN104777070A CN201510125622.1A CN201510125622A CN104777070A CN 104777070 A CN104777070 A CN 104777070A CN 201510125622 A CN201510125622 A CN 201510125622A CN 104777070 A CN104777070 A CN 104777070A
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- calcium silicate
- porous calcium
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Abstract
The invention discloses a method using a microwave muffle furnace to rapidly measure the ash content of paper filled with porous calcium silicate. The method comprises the following steps: cutting a piece of paper filled with porous calcium silicate into a plurality of paper samples with an identical size; weighing the paper samples, burning a crucible until the weight of the crucible does not change any more, weighing the crucible; placing a paper sample into the crucible, then burning the paper sample in the crucible in a microwave muffle furnace with a temperature of 525 DEG C; after the paper sample is completely burned down, taking out the crucible, cooling the crucible in the air for a while, weighing the cooled crucible; and finally calculating the ash content of the paper filled with porous calcium silicate. The provided method can rapidly measure the ash content, the data is precise, and the requirements of the production and scientific research can be fully satisfied.
Description
Technical field
The present invention relates to a kind of determination techniques of greyness of paper, be specifically related to a kind of microwave Muffle furnace Fast Measurement porous calcium silicate that adopts and add the method for filling out greyness of paper.
Background technology
Porous calcium silicate is utilizing fuel-burning power plant solid waste coal ash to extract a kind of secondary product produced in the process of aluminium oxide, adding porous calcium silicate filler, can significantly improve air permeability and the bulk of paper in paper making.But too much calcium silicate addition can sacrifice the strength character of paper, so detect paper mesosilicic acid calcium content in paper-making process fast, raising paper performance is of great importance.
At present for the measurement of greyness of paper, standard method weighs the measurement that residue carries out ash content after pattern is carried out calcination by muffle furnace under 525 DEG C or 900 DEG C of conditions, but what traditional muffle furnace adopted is Resistant heating, temperature-rise period is slow, ashing time and energy cost high, emission gases can pollute working environment in the course of the work, there is temperature distributing disproportionation in burner hearth in muffle furnace simultaneously, on the low side near stockhole temperature, temperature oscillation is large, the problems such as temperature deviation is large; Adopt X-ray diffraction analysis can carry out Accurate Analysis to paper elements, but this instrument involves great expense, and needs temperature control, control is wet, is not suitable for laboratory environment.
Summary of the invention
A kind of microwave Muffle furnace Fast Measurement porous calcium silicate that adopts is the object of the present invention is to provide to add the method for filling out greyness of paper, to overcome the defect that above-mentioned prior art exists, it is fast that the present invention measures grey component velocity, data are accurate, can meet the needs for greyness of paper Fast Measurement in production and scientific research completely.
For achieving the above object, the present invention adopts following technical scheme:
Adopt microwave Muffle furnace Fast Measurement porous calcium silicate to add a method of filling out greyness of paper, comprise the following steps:
Step one: porous calcium silicate is added and fills out paper and be cut into some measure-alike patterns;
Step 2: weigh pattern and the weight of burning the crucible to constant mass in advance for placing pattern;
Step 3: load weighted pattern is put into load weighted crucible, then puts into the microwave Muffle furnace calcination being warming up to 525 DEG C in advance by the crucible that pattern is housed;
Step 4: after calcination completely, takes out after crucible also cools certain hour in atmosphere and takes its weight;
Step 5: calculating porous calcium silicate adds fills out greyness of paper, and computing formula is as follows:
Wherein, X represents that porous calcium silicate adds and fills out greyness of paper, %;
G
0represent the absolute dry mass of pattern, g;
G
1represent the weight of the front burner of burning, g;
G
2represent the weight of cooling after-burner, g;
M represent filler in muffle furnace under 525 ± 25 DEG C of conditions the loss on ignition of calcination 4h, %.
Further, in step one, porous calcium silicate is added and fill out the pattern that paper is cut into 5mm × 5mm.
Further, described crucible is silica crucible.
Further, silica crucible specification is 50mL or 100mL.
Further, in step 4, cool time is 10 ~ 30s.
Further, in step 3, calcination time is 10 ~ 40min.
Further, analytical balance is all adopted to weigh in step 2 and step 4.
Compared with prior art, the present invention has following useful technique effect:
Microwave Muffle furnace of the present invention rises to 525 DEG C by room temperature, used time is less than 20min, have that heating is fast, energy consumption is low, sample just directly ashing can obtain feature through carbonization hardly, adopt the Resistant heating muffle furnace in microwave Muffle furnace replacement ash determination standard method, effectively overcome the defects such as traditional muffle furnace heating rate is slow, ashing time is long, energy consumption is large.Microwave Muffle furnace is heated pattern by microwave direct projection material inside, can ensure that pattern is heated evenly, and effectively prevent pattern calcination time in traditional muffle furnace not enough and occur the problem of black carbon element.Standard method measures greyness of paper needs electric furnace carbonization, the processes such as muffle furnace calcination, crucible cooling, adopts microwave Muffle furnace not need electric furnace carbonization, sample directly can be put into microwave Muffle furnace and carry out high temperature sintering.The calcination time of pattern in microwave Muffle furnace is no more than 40min just can by complete for pattern ashing.
Further, its special silica crucible can not react under the high temperature conditions with how empty calcium silicate, and silica crucible cools 10 ~ 30s after high temperature sintering in air just can drop to room temperature, effectively shortens ash content detection time.Whole test process can complete completely under low energy consumption condition in 1h, adopts standard ash determination method at least to need 6h under same temperature conditions.
Embodiment
Below embodiments of the present invention are described in further detail:
Adopt microwave Muffle furnace Fast Measurement porous calcium silicate to add a method of filling out greyness of paper, comprise the following steps:
Step one: porous calcium silicate is added and fills out paper and be cut into some patterns being of a size of 5mm × 5mm;
Step 2: adopt analytical balance to weigh pattern and the weight of burning the silica crucible to constant mass in advance for placing pattern; The silica crucible specification adopted is 50mL or 100mL;
Step 3: load weighted pattern is put into load weighted crucible, then puts into the microwave Muffle furnace calcination 10 ~ 40min being warming up to 525 DEG C in advance by the silica crucible that pattern is housed;
Step 4: after calcination completely, takes out after silica crucible also cools 10 ~ 30s in atmosphere and adopts analytical balance to take its weight;
Step 5: calculating porous calcium silicate adds fills out greyness of paper, and computing formula is as follows:
Wherein, X represents that porous calcium silicate adds and fills out greyness of paper, %;
G
0represent the absolute dry mass of pattern, g;
G
1represent the weight of the front burner of burning, g;
G
2represent the weight of cooling after-burner, g;
M represent filler in muffle furnace under 525 ± 25 DEG C of conditions the loss on ignition of calcination 4h, %.
Below in conjunction with embodiment, implementation process of the present invention is described in further detail:
Standard ash content is measured according to GB/T 742-2008 (mensuration of paper making raw material, paper pulp, paper and paperboard ash content).
Embodiment 1
Porous calcium silicate adds fills out electro-photographic paper (quantitative 70g/m
2), get 2g calcium silicate to add and fill out the pattern that xerox is cut into some 5mm × 5mm, analytical balance (0.0001g) is adopted to weigh pattern and burn in advance to the weight of the 100mL silica crucible of constant mass, the silica crucible that pattern is housed is put into the microwave Muffle furnace calcination 40min being warming up to 525 DEG C in advance, calcination is taken out completely afterwards after silica crucible cools 10s in atmosphere and is weighed the silica crucible weight filling lime-ash, then weigh on analytical balance, finally by calculating its ash value, with three measurement result calculating mean values.Standard ash content and Fast Measurement ash content as shown in table 1.
Table 1
Embodiment 2
Porous calcium silicate laboratory handsheet paper (quantitative 70g/m
2), get the small paper block that 1g porous calcium silicate laboratory handsheet paper is cut into some 5mm × 5mm, after adopting analytical balance (0.0001g) to weigh the weight of pattern and 50mL silica crucible, the silica crucible that pattern is housed is put into the microwave Muffle furnace calcination 20min being warming up to 525 DEG C in advance, calcination is taken out completely afterwards after silica crucible cools 20s in atmosphere and is weighed the silica crucible weight filling lime-ash, then weigh on analytical balance, finally by calculating its ash value, with three measurement result calculating mean values.Standard ash content and Fast Measurement ash content as shown in table 2.
Table 2
Embodiment 3
Porous calcium silicate laboratory handsheet paper (quantitative 65g/m
2), get the small paper block that 0.5g porous calcium silicate laboratory handsheet paper is cut into some 5mm × 5mm, after adopting analytical balance (0.0001g) to weigh the weight of pattern and 50mL silica crucible, the silica crucible that pattern is housed is put into the microwave Muffle furnace calcination 10min being warming up to 525 DEG C in advance, calcination is taken out completely afterwards after silica crucible cools 30s in atmosphere and is weighed the silica crucible weight filling lime-ash, then weigh on analytical balance, finally by calculating its ash value, with three measurement result calculating mean values.Standard ash content and Fast Measurement ash content as shown in table 3.
Table 3
The present invention implements according to above-mentioned embodiment, the Rapid ash score value obtained all standard ash content average ± 1% scope in, degree of accuracy and stability meet the request for utilization of ash content Fast Measurement.
Claims (7)
1. adopt microwave Muffle furnace Fast Measurement porous calcium silicate to add a method of filling out greyness of paper, it is characterized in that, comprise the following steps:
Step one: porous calcium silicate is added and fills out paper and be cut into some measure-alike patterns;
Step 2: weigh pattern and the weight of burning the crucible to constant mass in advance for placing pattern;
Step 3: load weighted pattern is put into load weighted crucible, then puts into the microwave Muffle furnace calcination being warming up to 525 DEG C in advance by the crucible that pattern is housed;
Step 4: after calcination completely, takes out after crucible also cools certain hour in atmosphere and takes its weight;
Step 5: calculating porous calcium silicate adds fills out greyness of paper, and computing formula is as follows:
Wherein, X represents that porous calcium silicate adds and fills out greyness of paper, %;
G
0represent the absolute dry mass of pattern, g;
G
1represent the weight of the front burner of burning, g;
G
2represent the weight of cooling after-burner, g;
M represent filler in muffle furnace under 525 ± 25 DEG C of conditions the loss on ignition of calcination 4h, %.
2. a kind of microwave Muffle furnace Fast Measurement porous calcium silicate that adopts according to claim 1 adds the method for filling out greyness of paper, it is characterized in that, is added by porous calcium silicate and fill out the pattern that paper is cut into 5mm × 5mm in step one.
3. a kind of microwave Muffle furnace Fast Measurement porous calcium silicate that adopts according to claim 1 adds the method for filling out greyness of paper, and it is characterized in that, described crucible is silica crucible.
4. a kind of microwave Muffle furnace Fast Measurement porous calcium silicate that adopts according to claim 3 adds the method for filling out greyness of paper, and it is characterized in that, silica crucible specification is 50mL or 100mL.
5. a kind of microwave Muffle furnace Fast Measurement porous calcium silicate that adopts according to claim 3 adds the method for filling out greyness of paper, and it is characterized in that, in step 4, cool time is 10 ~ 30s.
6. a kind of microwave Muffle furnace Fast Measurement porous calcium silicate that adopts according to claim 1 adds the method for filling out greyness of paper, and it is characterized in that, in step 3, calcination time is 10 ~ 40min.
7. a kind of microwave Muffle furnace Fast Measurement porous calcium silicate that adopts according to claim 1 adds the method for filling out greyness of paper, it is characterized in that, all adopts analytical balance to weigh in step 2 and step 4.
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Cited By (4)
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| CN105067479A (en) * | 2015-09-01 | 2015-11-18 | 解海龙 | Method for implementing hybrid type fly ash carbon content online detection device |
| CN107153033A (en) * | 2017-04-11 | 2017-09-12 | 神华集团有限责任公司 | The method for measuring content of ashes in polymer sample |
| CN111579420A (en) * | 2020-05-26 | 2020-08-25 | 山东省海洋生物研究院 | Method for measuring sand content in shellfish meat |
| CN111811982A (en) * | 2020-06-15 | 2020-10-23 | 江苏厚生新能源科技有限公司 | Diaphragm ash content measuring method based on UHMWPE material |
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Cited By (4)
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|---|---|---|---|---|
| CN105067479A (en) * | 2015-09-01 | 2015-11-18 | 解海龙 | Method for implementing hybrid type fly ash carbon content online detection device |
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| CN111579420A (en) * | 2020-05-26 | 2020-08-25 | 山东省海洋生物研究院 | Method for measuring sand content in shellfish meat |
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Application publication date: 20150715 |