Some standard content:
Electronic Industry Standard of the People's Republic of China
SJ/T10380-93
Acid washed quartz sand for industrial use
Published on July 21, 1993
Implemented on December 1, 1993
Published by the Ministry of Electronics Industry of the People's Republic of China
Acid washed quartz sand for industrial use
Acid washed quartz sand for use in industry
1 Subject content and scope of application
1.1 Subject content
8179 10330 --53
This standard specifies the technical requirements, test wall methods, inspection rules and marking, packaging, transportation and storage of acid washed quartz sand for industrial use.
1.2 Scope of application
This standard applies to acid washed quartz sand for industrial use. It is mainly used as the material for the manufacture of electronic glass, optical glass and bracket glass.
2 Reference standards
GB6682
3 Technical requirements
Preparation of standard for determination of impurities in chemical reagents Preparation of preparations and products used in chemical reagent test methods Laboratory water specifications
3.1 Appearance: It should be white granular and free of visible mechanical impurities. 3.2 Moisture content: The moisture content of acid-washed quartz sand after drying should be equal to or less than 0.3%, and the moisture content of wet sand should be equal to or less than 5%.
3.3 The chemical composition and particle size of industrial acid-washed quartz sand should meet the requirements of Table 1 and Table 2 respectively. Table 1
Indicator Item%
Silicon dioxide (Si)
Iron (as FeO2)
(as CuO2)
Chromium [as Cr2O2]
19930721 Ministry of Electronics Industry of the People's Republic of China Second level approved
.0.0009
1993 12 0 Actual energy
0.45 ~~ 0.110mm
(40~140 mm)
0.45~0.074mm
(40~200 mm)
0.28~0.074mm
(50--200 mm)
Maximum retention on sieve%
SJ/T 10380—93
0.60m30 days）
0. 60rmm(90 days)
0. 355mm(50 months)
all through
0.11mm(140 days）
0. 074mm(200 days)
0.074mm(200 days)
0.095inn(160 months）
0.064mm(220 countries)
0. 063mm(220 4. Test method
4.1 Appearance inspection
Visual inspection should meet the requirements of 3.1.
4. 2 Determination of water content
4.2.1 Summary of method
Determine the water content according to the weight loss of the sample after drying at 110℃. 4. 2. 2 Analysis steps
Weigh 2g of sample, accurate to 0.0002g, place in a horizontal weighing bottle with constant weight, dry in an oven at 110℃ for 21h, take out, cool to room temperature in a desiccator, and weigh. 4.2.3 Calculation
The moisture content expressed as a percentage shall be calculated according to the following formula: Moisture content = % × 100
Where m…-mass of the sample before drying, m1-mass of the sample after drying, g.
4.3-Determination of chemical composition
The preparation of the standard solution used in the determination of chemical composition and the preparation of the preparations and products used shall comply with the provisions of GB602 and GB603. The water used in the experiment shall comply with GB 6682 Grade III water specifications. Unless otherwise specified, the purity of the reagents used in the determination shall be analytical grade or above.
4.3.1 Determination of silicon dihydride
4.3.1.1 Summary of the method
The sample is treated with sulfuric acid and hydrochloric acid to volatilize silicon dioxide in the form of tetrahydrosilicon dioxide. The content of silicon dioxide is calculated based on the amount of volatilization.
4.3-1.2 Preparation of the sample
SJ/T 10380—93
Use the quartering method to reduce the selected laboratory sample to 20-30g, according to the test requirements, melt it in a goose brain mortar (no grainy feeling with fingers), transfer it to a weighing bottle, dry it at 110 degrees for 2 hours, take it out, and store it in a desiccator for later use. 4.3.1.3 Reagents
Hydrofluoric acid 40%
Sulfuric acid 1+1
4.3.1.4 Analysis steps||tt ||Weigh 1 sample to 0.0002g, place in a constant weight platinum alkali, add a small amount of water to moisten, add 5 drops of sulfuric acid (1-1), 15ml hydrofluoric acid, evaporate on a sand bath until white sulfuric acid smoke appears, cool to room temperature, rinse the wall with a small amount of water, add 5ml hydrofluoric acid, and dry the sand. Burn at 900℃ to constant weight. 4.3.1.5 Calculation
The content of silicon dioxide expressed as a percentage is calculated as follows: Silicon dioxide = m2ma × 100
Wherein: A1--mass of ground exhaust gas sample·g3Mass of exhaust gas and residue after hydrochloric acid treatment. B3m--mass of sample after burning·g
4.3.2 Determination of ferric oxide
4.3.2.1 Summary of method
In an acidic solution of pH 5, Fe\ is reduced to Fe+ with hydroxylamine hydrochloride to form a red complex with o-phenanthroline. The red complex is measured by spectrophotometry. The meter measures the absorbance at a wavelength of 510 mm. 4.3.2.2 Test solution
Hydrofluoric acid
Tartaric acid
Hydroxyamine hydrochloride
P-nitrophenol
100 g/l
Acetic acid-sodium acetate buffer solution, pH ~ 4.5, the preparation method shall be carried out in accordance with the relevant provisions of GB6U3. o-Phenanthroline: 2 g/l, weigh 0.2 g o- Ferro, add a small amount of ethanol to dissolve, dilute to 100ml with water. Ferric oxide standard solution: weigh 0.604g ammonium ferric sulfate, add 100ml water, 10ml sulfuric acid (1+1), dissolve and transfer to a 1000ml volumetric flask and dilute to the scale and shake. Then dilute this solution 10 times for colorimetry (1ml0.01rg). 4.3.2.3 Analysis steps
Weigh 2g sample, accurate to 0.001g, place in a platinum end, add a small amount of water to moisten the pot, add 10 drops of sulfuric acid (1+1), 20ml hydrofluoric acid, heat on a sand bath until sulfuric acid smoke comes out, cool to room temperature, rinse the snail wall with a small amount of water, add 10ml hydrofluoric acid, and then steam until sulfuric acid comes out, cool, add 10ml hydrochloric acid (1+1), heat at low temperature to dissolve the residue, cool and transfer to a 100ml volumetric flask, dilute to the scale with water. This solution is A. 3
SJ/T 103B0--93
Use a pipette to draw 10ml of solution A into a 100ml volumetric flask, add 25ml of water, 5ml of tartaric acid <100g/), 12-nitrophenol solution (1g/1), and drop ammonia water (10%) to make the solution yellow, then add hydrochloric acid (1+1) to adjust the solution to be just colorless. For example, 5ml of hydroxylamine hydrochloride (50g/1), after 5 minutes, add 5ml of sodium acetate butyrate solution and 5ml of o-phenanthroline (2g/1) diluted with water to the scale. Let it stand for 15 minutes, and measure the absorbance of the test solution to the test white at a wavelength of 510nm on a spectrophotometer with a 3cm colorimetric blood. The content of ferric oxide can be obtained from the standard curve. 4.3.2.4 Drawing of standard curve
Accurately absorb 00.50, 1.0, 1.50, 2.00, 2.50ml of ferric oxide standard solution (1ml-0.01mg) and place them in 100ml capacity respectively, add 50ml of water, and perform the following operations according to the analysis steps. Use the ferric oxide content as the horizontal axis and the corresponding absorbance as the vertical axis to draw a standard curve. 4.3.2. 5 Calculation
The content of ferric oxide expressed as a percentage is calculated as follows: ferric oxide = mX 10
m×100×100
Where: ...the content of ferric oxide in the solution to be tested is obtained from the standard curve, mg. Address: --The mass of the sample after calcination, g.
4.3.3 Determination of copper oxide
4.3.3.1 Summary of the method
In a volatile solution (pH 8.10), copper reacts with sodium diethyl dithiocarbamate to form a yellow complex. The absorbance is measured at a wavelength of 440nm using a spectrophotometer. 4.3.3.2 Reagents and solutions
Ammonium chlorate
Ammonium citrate solution: 200g/!
Phenol titanium indicator: 1g/1Ethanol solution
Sodium diethyl dithiocarbamate (copper reagent): 1g/1Oxidation standard solution: Weigh 0.311g of copper sulfate (CuSO, 5H, 0), dissolve it in water, transfer it into a 1000ml volumetric flask, dilute to the scale, and shake well. Then dilute this solution 100 times for colorimetry (1ml=0.001mg). Tris(o-nitro)ethane
4.3.3.3 Analysis steps
Put 20ml of quasi-nitrogen absorption solution A (see 4.3.2.3) in a 100ml separatory funnel, add 5ml of ammonium citrate solution (200g/1), add a drop of titanium phenol indicator (1g/1), neutralize with ammonium hydroxide (10%) until fine powder, add 5ml of copper reagent (1g/1) and 10ml of tris(o-nitro)ethane for extraction, shake thoroughly for 2min, let stand, and separate the organic phase. On the spectrophotometer, at a wavelength of 440nm, use a 2cm colorimetric nozzle to test the absorbance of the reagent blank, and check the copper oxide content from the standard curve. 4.3.3.4 Drawing of the standard curve
Accurately pipette 0.1.00, 2.00, 3.00.4.00.5.00ml of the copper oxide standard solution (1ml=0.001mg), place it in a 100ml separatory funnel, dilute it to 50ml with water, and perform the following operations according to the analysis steps. Use the copper oxide content as the horizontal axis and the corresponding absorbance as the vertical axis to draw a standard curve. 4.3.3.5 Calculation
The content of copper oxide expressed as a percentage shall be calculated according to the following formula: SJ/T 10380-93
Copper oxide
m X1000
Wherein: mg is the content of copper oxide in the solution to be tested obtained from the standard curve. mg is the mass of the sample after calcination, name.
4.3.4 Determination of chromium trioxideWww.bzxZ.net
4.3.4.1 Summary
In an acidic solution, hexavalent chromate reacts with diphenylcarbohydrazide to form a red complex, and the absorbance is measured at a wavelength of 540 nm using a spectrophotometer.
4.3.4.2 Solvents and solvents
Silver nitrate
Ammonium persulfate
Triphenylcarbohydrazide ethanol solution
Chromium trioxide standard solution: Weigh 0.1936g potassium dichromate, dissolve it in water, transfer it into a [0.200 ml] volumetric bottle, dilute it, shake it well, and then dilute the solution by 100 (1 ml = 0.001 mg). For colorimetry. 4.3.4.3 Analysis steps
Accurately pipette 20 ml of solution A (see 4.3.3) and place it in a 100 ml beaker. Add 20 ml of water, 1 ml of mercaptic acid (1+1), 10 drops of silver nitrate (5 g/1), and 0.5 g of ammonium persulfate. Shake well and boil for 12 min. After cooling, transfer to a 50 ml volumetric flask. Add 3 ml of diphenylcarbonyl solution, shake well to the dilution mark, place on a spectrophotometer for 1 min. At a wavelength of 540 nm, use a 3 cm colorimetric test tube to measure the absorbance of the reagent blank and obtain the concentration of chromium trioxide from the standard curve. 4.34.4 Drawing of standard curve
Accurately pipette 0.1.00, 2.00, 3.00, 4.00.5.00 ml of chromium trioxide standard solution (1 ml 0.001 mg), respectively, and place in 50 ml volumetric flasks and add 40 ml of water. The following operations are carried out according to the analytical steps. With the content of chromium trioxide as the horizontal axis and the corresponding absorbance as the vertical axis, draw a standard curve. 4.3.4.5 Calculation
The content of chromium trioxide expressed as a percentage is calculated according to the following formula: chromium trioxide -
mi × 1000
Where: m,----the content of chromium trioxide in the solution to be tested is obtained from the standard curve mgm-the mass of the sample after drying·g.
4.4 Determination of particle size
4.4.1 Instruments and equipment:
Stand-mounted balance;
Vibrating screen:
Standard screen.
4.4.2 Determination steps
SJ/T 10380—93
Weigh 100g of sample, accurate to 0.1g, and place it on the top of the full set of standard screens. The 45mm (40 mesh) sieve will be fixed on the sand screening machine for screening. (If an electromagnetic micro-vibration sand screening machine is used, the vibration and amplitude knobs should be rotated so that the weir knob is at 3mm). The screening time is 10~15min. Remove the standard sieve, and place the sand on each sieve and the remaining sand on the chassis on smooth paper in turn. Use a soft brush to carefully brush off the sand trapped in the mesh from the back of the sieve. Weigh the mass of the sand in each standard sieve, and finally calculate the percentage of the mass of the sand on each sieve to the total basis of the sample at the recording point. 5 Inspection rules
5.1 The quality inspection department of the manufacturer shall inspect the industrial pickled quartz sand according to the technical requirements specified in Chapter 3 of this standard and the marking and packaging requirements specified in Chapter 6 of this standard, and ensure that each batch of products leaving the factory meets the requirements of this standard. 5.2 Inspection items Each batch of products shall be inspected according to all items specified in Chapter 3 and Article 6.2 of this standard. 5.3 Sampling method
Take samples from different parts of each batch of stacked quartz sand according to the number of bags of 1% of the batch, but at least not less than three bags, mix them carefully, and reduce them to 500g test empty samples by quartering method, and pack them into two dry and clean bottles. Label the bottles with the manufacturer's name, product name, grade, batch number and sampling date. One bottle is used for inspection and the other bottle is kept for three months for future reference.
5.4 Inspection results If one indicator does not meet the requirements of this standard, double sampling should be done and re-inspected. If the inspection results still do not meet the requirements of this standard, the batch of products is unqualified. 6 Marking, packaging, transportation and storage
6.1 Industrial washed quartz sand is packed with double-layer plastic bags inside and woven bags outside, and the seams are sewn by a bag sewing machine. Net weight 50kg. If there are special packaging requirements, they shall be agreed upon by the supply and demand parties. 6.2 For each batch of packaged products, the bag shall have the manufacturer's name, product name, specifications, and net weight. The package shall be accompanied by a product certificate, which shall indicate the manufacturer's name, product name, specification level, batch number, net weight and this standard number. 6.3 Industrial pickled quartz sand should be stored in a dry and clean place. During transportation, attention should be paid to waterproofing and avoiding breakage and contamination. Additional notes:
This standard is under the jurisdiction of the Standardization Institute of the Ministry of Electronics Industry. This standard was drafted by Hubei Guangshui Quartz Sand Factory. The main drafters of this standard: Li Daguang, Fu Yichun, Liu Baoyu, Liu Chengjun, 61936g potassium dichromate, dissolved in water, transferred to a 100ml volumetric flask, diluted to the mark. Shake well, and then dilute this solution by 100 (1ml=0.001mg). For colorimetry. 4.3.4.3 Analysis steps
Accurately pipette 20ml of solution A (see 4.3.3) and place it in a 100ml beaker, add 20ml water, 1ml mercaptic acid (1+1), 10 drops of silver nitrate (5g/1), 0.5g ammonium persulfate, shake well, boil for 12min, cool and transfer to a 50ml volumetric flask, add 3ml diphenylcarbonyl solution, dilute to the mark and shake well, place 1gmin on a spectrophotometer, at a wavelength of 540nm, use a 3cm colorimetric test tube to measure the absorbance of the reagent blank, and check the content of chromium trioxide from the standard curve. 4.34.4 Drawing of standard curve
Accurately pipette 0.1.00, 2.00, 3.00, 4.00.5.00 ml of chromium trioxide standard solution (1 ml 0.001 mg), respectively, and place in 50 ml volumetric flasks and add 40 ml of water. The following operations are carried out according to the analytical steps. With the content of chromium trioxide as the horizontal axis and the corresponding absorbance as the vertical axis, draw a standard curve. 4.3.4.5 Calculation
The content of chromium trioxide expressed as a percentage is calculated according to the following formula: chromium trioxide -
mi × 1000
Where: m,----the content of chromium trioxide in the solution to be tested is obtained from the standard curve mgm-the mass of the sample after drying·g.
4.4 Determination of particle size
4.4.1 Instruments and equipment:
Stand-mounted balance;
Vibrating screen:
Standard screen.
4.4.2 Determination steps
SJ/T 10380—93
Weigh 100g of sample, accurate to 0.1g, and place it on the top of the full set of standard screens. The 45mm (40 mesh) sieve will be fixed on the sand screening machine for screening. (If an electromagnetic micro-vibration sand screening machine is used, the vibration and amplitude knobs should be rotated so that the weir knob is at 3mm). The screening time is 10~15min. Remove the standard sieve, and place the sand on each sieve and the remaining sand on the chassis on smooth paper in turn. Use a soft brush to carefully brush off the sand trapped in the mesh from the back of the sieve. Weigh the mass of the sand in each standard sieve, and finally calculate the percentage of the mass of the sand on each sieve to the total basis of the sample at the recording point. 5 Inspection rules
5.1 The quality inspection department of the manufacturer shall inspect the industrial pickled quartz sand according to the technical requirements specified in Chapter 3 of this standard and the marking and packaging requirements specified in Chapter 6 of this standard, and ensure that each batch of products leaving the factory meets the requirements of this standard. 5.2 Inspection items Each batch of products shall be inspected according to all items specified in Chapter 3 and Article 6.2 of this standard. 5.3 Sampling method
Take samples from different parts of each batch of stacked quartz sand according to the number of bags of 1% of the batch, but at least not less than three bags, mix them carefully, and reduce them to 500g test empty samples by quartering method, and pack them into two dry and clean bottles. Label the bottles with the manufacturer's name, product name, grade, batch number and sampling date. One bottle is used for inspection and the other bottle is kept for three months for future reference.
5.4 Inspection results If one indicator does not meet the requirements of this standard, double sampling should be done and re-inspected. If the inspection results still do not meet the requirements of this standard, the batch of products is unqualified. 6 Marking, packaging, transportation and storage
6.1 Industrial washed quartz sand is packed with double-layer plastic bags inside and woven bags outside, and the seams are sewn by a bag sewing machine. Net weight 50kg. If there are special packaging requirements, they shall be agreed upon by the supply and demand parties. 6.2 For each batch of packaged products, the bag shall have the manufacturer's name, product name, specifications, and net weight. The package shall be accompanied by a product certificate, which shall indicate the manufacturer's name, product name, specification level, batch number, net weight and this standard number. 6.3 Industrial pickled quartz sand should be stored in a dry and clean place. During transportation, attention should be paid to waterproofing and avoiding breakage and contamination. Additional notes:
This standard is under the jurisdiction of the Standardization Institute of the Ministry of Electronics Industry. This standard was drafted by Hubei Guangshui Quartz Sand Factory. The main drafters of this standard: Li Daguang, Fu Yichun, Liu Baoyu, Liu Chengjun, 61936g potassium dichromate, dissolved in water, transferred to a 100ml volumetric flask, diluted to the mark. Shake well, and then dilute this solution by 100 (1ml=0.001mg). For colorimetry. 4.3.4.3 Analysis steps
Accurately pipette 20ml of solution A (see 4.3.3) and place it in a 100ml beaker, add 20ml water, 1ml mercaptic acid (1+1), 10 drops of silver nitrate (5g/1), 0.5g ammonium persulfate, shake well, boil for 12min, cool and transfer to a 50ml volumetric flask, add 3ml diphenylcarbonyl solution, dilute to the mark and shake well, place 1gmin on a spectrophotometer, at a wavelength of 540nm, use a 3cm colorimetric test tube to measure the absorbance of the reagent blank, and check the content of chromium trioxide from the standard curve. 4.34.4 Drawing of standard curve
Accurately pipette 0.1.00, 2.00, 3.00, 4.00.5.00 ml of chromium trioxide standard solution (1 ml 0.001 mg), respectively, and place in 50 ml volumetric flasks and add 40 ml of water. The following operations are carried out according to the analytical steps. With the content of chromium trioxide as the horizontal axis and the corresponding absorbance as the vertical axis, draw a standard curve. 4.3.4.5 Calculation
The content of chromium trioxide expressed as a percentage is calculated according to the following formula: chromium trioxide -
mi × 1000
Where: m,----the content of chromium trioxide in the solution to be tested is obtained from the standard curve mgm-the mass of the sample after drying·g.
4.4 Determination of particle size
4.4.1 Instruments and equipment:
Stand-mounted balance;
Vibrating screen:
Standard screen.
4.4.2 Determination steps
SJ/T 10380—93
Weigh 100g of sample, accurate to 0.1g, and place it on the top of the full set of standard screens. The 45mm (40 mesh) sieve will be fixed on the sand screening machine for screening. (If an electromagnetic micro-vibration sand screening machine is used, the vibration and amplitude knobs should be rotated so that the weir knob is at 3mm). The screening time is 10~15min. Remove the standard sieve, and place the sand on each sieve and the remaining sand on the chassis on smooth paper in turn. Use a soft brush to carefully brush off the sand trapped in the mesh from the back of the sieve. Weigh the mass of the sand in each standard sieve, and finally calculate the percentage of the mass of the sand on each sieve to the total basis of the sample at the recording point. 5 Inspection rules
5.1 The quality inspection department of the manufacturer shall inspect the industrial pickled quartz sand according to the technical requirements specified in Chapter 3 of this standard and the marking and packaging requirements specified in Chapter 6 of this standard, and ensure that each batch of products leaving the factory meets the requirements of this standard. 5.2 Inspection items Each batch of products shall be inspected according to all items specified in Chapter 3 and Article 6.2 of this standard. 5.3 Sampling method
Take samples from different parts of each batch of stacked quartz sand according to the number of bags of 1% of the batch, but at least not less than three bags, mix them carefully, and reduce them to 500g test empty samples by quartering method, and pack them into two dry and clean bottles. Label the bottles with the manufacturer's name, product name, grade, batch number and sampling date. One bottle is used for inspection and the other bottle is kept for three months for future reference.
5.4 Inspection results If one indicator does not meet the requirements of this standard, double sampling should be done and re-inspected. If the inspection results still do not meet the requirements of this standard, the batch of products is unqualified. 6 Marking, packaging, transportation and storage
6.1 Industrial washed quartz sand is packed with double-layer plastic bags inside and woven bags outside, and the seams are sewn by a bag sewing machine. Net weight 50kg. If there are special packaging requirements, they shall be agreed upon by the supply and demand parties. 6.2 For each batch of packaged products, the bag shall have the manufacturer's name, product name, specifications, and net weight. The package shall be accompanied by a product certificate, which shall indicate the manufacturer's name, product name, specification level, batch number, net weight and this standard number. 6.3 Industrial pickled quartz sand should be stored in a dry and clean place. During transportation, attention should be paid to waterproofing and avoiding breakage and contamination. Additional notes:
This standard is under the jurisdiction of the Standardization Institute of the Ministry of Electronics Industry. This standard was drafted by Hubei Guangshui Quartz Sand Factory. The main drafters of this standard: Li Daguang, Fu Yichun, Liu Baoyu, Liu Chengjun, 6
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