GB/T 5399-2004 Pulp - Determination of stock concentration

This standard specifies a method for determining the slurry concentration of a pulp suspension. This method is applicable to various pulp suspensions and is not applicable to the determination of the sales quality of thin pulp. GB/T 5399-2004 Pulp - Determination of slurry concentration GB/T5399-2004 Standard download decompression password: www.bzxz.net

ICS B5.040
National Standard of the People's Republic of China
GB/T 5399—2004/1S0 4119:1995 Successor to GB/5399-1985
Determination of pulp concentration
Pulps-Determination of stock concentration(IS)4119.1995,113T)
Issued on March 15, 2004
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China Administration of Standardization of the People's Republic of China
Implementation on November 1, 2004
This standard is equivalent to TS04119, 1995 Paper covering - Determination of pulp concentration3.
This standard makes the following editorial changes to 15(）4119:995: Use *This standard to replace this international standard
Change "Note 1\ to "Note", "Note 2", Note 8\ to "Note 1", "Note" GB/T5399—204/IS041191995
Change "Calculate with the following formula\ to "Calculate with formula (1》"--Change "Calculate with the following formula\ to "Calculate with public Wu (2)\. This standard replaces GB/ T5399-19B5 Rapid determination of pulp density This standard G/T59-85 has been modified as follows:
1. In order to unify with international standards, the name of the standard has been changed from "Rapid determination of paper density" to "Determination of pulp density"; the preface has been added, the relevant contents of the original standard supplementary instructions have been rewritten, and the relevant contents such as "standard application" and "test report" have been added. The sensitivity of the instrument has been adjusted:
The classification of density has been changed:
In the table of results In the demonstration, the relevant new formula was added. The wood standard was proposed by the China Light Industry Federation. The standard was drafted by the National Technical Committee for Standardization of Paper Industry. The drafting units of this standard are: Tianping Entry-Exit Inspection and Quarantine Bureau, China Pulp and Paper Research Institute. The main drafters of this standard are: Zhao Cuihua, Guo Jianshui, Chen Xi. The wood standard was first issued in 1985. This standard is interpreted by the National Technical Committee for Standardization of Paper Industry. 1 Scope GB/T5399-2QQ4/1S O4119:1995
Determination of pulp stock concentration
This standard specifies a method for determining the stock concentration of pulp suspension. This method is applicable to the total suspension of various paper products, not to the determination of the total mass of the pulp. 2 Terms and definitions
The technical terms and definitions of this standard shall apply. 2.1
Solid stock
One or more materials, which may contain fillers and additives. 2.2
Solid stock concentration Btock concentration
The ratio of the absolute dry mass of the material discharged from the sample to the mass of the unfiltered pulp sample, expressed as a percentage of mass. 3 Instruments
General laboratory instruments and
3. 1. The measuring device should have enough capacity to measure the sample. 3.2. The balance should be suitable for weighing 1m~0.01g. 3.3. The filtering device should be a Brinell bucket with a weight of 0.0015mm-150mm. A suction bottle and two suitable paper grades should be prepared.
3.4. The sample should be dried in a suitable oven or electric heating plate. The oven temperature should be 1052℃ and the core temperature of the heating plate should be 150℃. Note 1: If the working environment (temperature and temperature) is too hot, the sample should be dried in a suitable oven or electric heating plate. The oven temperature should be 1052℃ and the core temperature of the heating plate should be 150℃. Drying time> has been verified, the micro-furnace and the air drying furnace can be used quickly to obtain the sample effect, and the micro-furnace can also be effectively selected for long-term use. The test sample is not purchased in an open environment, which may cause the product to be traceable. Note 2: The temperature of the test sample reaches 150℃. For the world, the possibility of excessive emission is too high, which will cause the product to be induced. 3.5 Balance, appropriate amount of dried fiber cake, sensitivity is 0.018. 4 Sampling and sample preparation
4.1 General method
Mix the aggregate sample thoroughly and take samples while stirring. Sample: Use a suitable sampler to quickly collect samples to reduce the separation of fiber and moisture. All samples can be obtained at one time or mixed from several small samples, but all samples should be taken from the sample to be weighed. In the case of higher concentrations, incorrect sampling methods will lead to errors. Two parallel determinations should be made or the number of determinations specified by the test method should be repeated: 4.2 When the feed concentration is less than 0.3% (mass fraction), take 500mL of sample. The sample should be large enough to ensure that the correct slurry is E*5g. Pour the full sample into a container of known mass and weigh it with a balance (m). The error should be less than 0.5g. 4.3 When the feed concentration is 0. 3%~1% mass fraction) Take 5JIg of sample and pour it into a container (1) of a certain mass, and weigh it with a balance (3.2) to determine its net weight (m) The error should be less than 0.5g
4.4 Slurry concentration is greater than 1% (mass fraction) Take about 50) and put it into a known mass container (3.1), and weigh it with a large balance to determine its net weight (the error should be less than 0.5. Then use GB/T5399-2004/1834119,1995 water sieve, the water content (%2) is known, and the difference should be small At 0.5, dilute the benzene content of the slurry to less than 1%, obtain sufficient quality, take more than 500 Hong Kong compounds, put them into a known mass of the penetration device (3.1), use the dog level (3.2) to weigh its net weight (m). The error should be less than 0.58.5 Test steps
month furnace box or hot plate under the appropriate road display, scratch ten filter paper until the sub. Weigh the filter surface () accurately to 0.01: when the difference between the filter paper weighed twice is not more than 0.01, it is considered to reach the mutual, and in any case, the two weighings are dried for ten hours. The time should be the same as the previous time. Note 3: Yao Ding's filter paper can be cooled in the filter and then weighed. Put the filter paper in a cloth bucket and wet the filter paper with water. Then use suction to filter the pulp in the weighing container. Rinse the inner wall of the container or the washing container, pour the washing into the bucket, make sure the wave is clear, otherwise continue to filter with the same filter, and use a tight filter line to do another test. Rinse the fiber cake with steamed water to remove the high-purity water, and carefully remove the fiber from the bucket. Remove all solid matter including the solid matter on the filter paper and dry the filter paper: dry and weigh the fiber cake and filter paper, and record the mass (M). The result is expressed as the mass percentage of the pulp. Then use formula (1) to calculate. Xm-mx100
Where:
is the mass of the pulp sample, in grams (g):
m--the absolute dry mass of the paper, in grams (g)--the absolute mass of the fiber carrier and filter paper, in grams). According to step 4.4, the pulp density should be calculated according to formula (2), mxm/m×10C
Where!
Mass of pulp sample, in grams (g):
The amount of water added to the raw material, in grams (g) m: The mass of the pulp sample taken, in grams (R) Fn,
The dry weight of Hong Kong paper, in grams (g) The absolute dry weight of fiber cake and paper alone, in grams (): The above results are confirmed to the last two digits of the minimum effective point.
The test report should include the following:
a) The number of this standard;
All necessary data for the complete test sample! The results expressed in terms of mass: bzxz.net
Any abnormality observed during the test; d
Any deviation from this standard that may affect the results
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.