This standard specifies the method for determining the amount of alumina by EDTA titration. This standard is applicable to the determination of alumina in magnesia and magnesia-alumina (aluminum-magnesium) refractory raw materials and products, with a determination range of 2.00% to 95.00%. GB/T 5069.7-2001 Chemical analysis method for magnesia and magnesia-alumina (aluminum-magnesium) refractory materials Determination of alumina by EDTA titration GB/T5069.7-2001 Standard download decompression password: www.bzxz.net

1cs81.080
National Standard of the People's Republic of China
G5/T 5069. 1 -5069. 13 2001
Chemical analysis methods for magnesia and nagusiaalumina retractary Materials2001 - 12 - 17 Issued
Xianghua People's Government and Science and Technology
National Quality Supervision and Inspection Administration
2002-05-01 Implementation
GRT 5069.7—200\
This standard amends GB/T53,%-1985 Chemical analysis method for quality refractory materials F1) A volumetric method for determining the content of alumina [suspended subscription
This revision amends the chemical analysis method for quality refractory materials to the same standard and the chemical analysis method for magnesium-aluminum-supported refractory materials
This revision adds "beneficial standards", "reference standards", and "allowable deviations" such as standard deviations. The content of this revision is as follows!| |tt||Determination range: 2.00%--10.00%--2.00%--95.03. Quantity: Use 100ml. Take 1ml of the sample, and change the concentration of magnesium aluminum or aluminum to the test solution (10g/L). Change the concentration of magnesium to 1ml. Add 15ml of the sample. Add 100ml of the sample. The concentration of the sample is changed from 10ml to 1ml of the sample, and the sample is sent to the pressure vessel [mL]. The concentration of zinc standard solution: (.0IM) is changed to magnesium: c2nUnder the general heading of chemical analysis of materials 3, there are 13 sub-standards: determination of ignition loss by ignition method; determination of silicon dioxide by optical variation method; determination of silicon monoxide by medium-light injection method; determination of iron oxide by o-photometric method; determination of ferric oxide by flame atomic absorption method; determination of main aluminum oxide by ELTA titration method; determination of titanium dioxide by photometric method; determination of peroxide by flame atomic absorption method; determination of calcium oxide by combined titration method; determination of sodium oxide by flame atomic absorption method. This standard shall be effective from the date of implementation. This standard shall be issued by the State Administration of Industry and Commerce. This standard is under the jurisdiction of the National Technical Committee for Standardization of Refractories. The main author of the standard is An Wenfei, Qiu Kuaihong, and the standard is issued on the following date:
National Standard of the People's Republic of China
Chemical analysis method for magnesia and magnesia-alumina (aluminum-magnesium) refractory materials - EDTA titrimetric method for determination of alumina content
Chemical analysis f magnesla and magnesia-alundna refractnry malerials -FDTA titrametric method tordelerminaticn of aiuminium oxide content1 ScopebzxZ.net
This standard specifies the method for determining the amount of alumina by EDTA titrimetric method. G0/T5069.72001
Reference/5069.61995
This standard applies to the determination of the oxidation saw blade in the refractory products of iron and aluminum (aluminum) raw materials, 2. Head ~ 9 yuan.00K
2 Referenced standards
The following standard contains the meanings of the new position, which is quoted in this standard and constitutes the standard text. All the appendices of this standard are valid. All standards will be revised and used by all parties who use this standard. The new version of the standard may be rotten. GB/120071987 Sampling of mineral products, super common B/door 5053.1-2UW1 Chemical analysis method of magnesium and group (retained magnesium) refractories Determination of average burning loss G! 8170-19H7 numerical temperature measurement
GB/1032.2001 Standard for the extraction of shaped pyrotechnic products 3 Method Summary
The sample is melted with a mixture of sodium carbonate and sodium sulphate, and then diluted hydrochloric acid is used to remove the titanium dioxide. If the mixture is pure 1)TA, the aluminum is finally combined with ETTA in a weak solution. Using the solution as an indicator, first titrate the ETTA with a standard zinc solution, then replace the ETTA with a certain amount, and finally use acetic acid standard solution to replace the ETTA to obtain alumina 4 Test
4.1 Mixed flux: Take 2 parts of anhydrous calcium carbonate and 1 part of acetic acid. 4.2 Hydrochloric acid (1-2)
A3 water (0, L),
4.4 Acid solution (1/L). Dissolve under slight heat. 4.5 Activated ammonium lacquer 1m.2
4.6 Six times the hot four glue level flushing liquid (H.5): you put 200 times in the burning forest, add water to dissolve, add 40 salt glue (.1l water full 10l.
4.? Lesson blue service (1g/L).
4. 8 Two, the total orange box [5±.1. Some of the stored standard disease, can be used 1 low, 4.9 Aluminum standard trapping liquid (containing AlC1.Cmgal) The People's Republic of China State Quality Supervision, Inspection and Quarantine General Post 2001-12-17 approved 26
2002 05 01According to GB/15069.7-2001, 5292g of gold-thickness (55.99%) was placed in a beaker with 20ml of water and 1g of 38% hydroxyl. After the mixture was completely removed, add 10ml of water slowly and then heat for 10min to boil for 2min until the liquid was clear. Cool to room temperature and dilute to the mark with 10ml of water. Add 10mg of FDTA to the mark. This concentration is about 10mL. 1.5mgAl2O3/Zn2O4 ... 4.12.2 Standard titration of the concentration of the two light standard solutions 4.12.2.1 Standard titration method Mix the amount of the standard solution (4.9) according to Table 2 and transfer 3 portions of the standard solution (4.9) to a beaker. Add the corresponding EDTA sieve solution (4.1) and dilute to about 10 ml. Heat the beaker to 70-80 °C. Add 2 portions of the EDTA sieve solution (4.7) and reduce the water (4.3) to a temperature of 30 °C. Remove the hot spot and cool to room temperature. Continue with the following titration for 6.4-5.5 minutes. Note the volume of the standard solution (4.12) consumed in the second titration. The maximum value of the volume consumed by the standard solution (4.9) should not exceed 10 L. Take the average value. 4.12.2.2 Calculation The degree of alumina consumption by the standard diethyl zinc solution is calculated according to the formula (1): T Wherein, T: [nm] The amount of diethyl zinc standard solution equivalent to aluminum oxide, unit is e/mL: Yr
The amount of acetic acid dissolved in the standard solution is taken out, unit is m/mL: ETA commercial solution. 10 m
V... The average volume of acetic acid consumed by the standard solution of aluminum oxide is m/L. 5 Samples are taken from GB/T [052] and GB/12007, and the sample is prepared. 5.1 The sample is processed to a particle size of less than 0.088 mm/s. 5.2 The sample should be dried at 10.1℃~11m, placed in a decompressor and cooled in a room temperature. 6 Analysis steps 6.1 Determination of effective quantity 2 minutes should be weighed and measured. 6.2 Resistance to material 1. Weigh the sample and make sure it is 1.27. 6.3 Air test 6.4 Verification test Analyze the same type of standard material in the test 6.5 Specification GB/T 5069.72DC1
6.5.1 Place sample 6.7 in a container containing 3-4 mixed flux (1.1). Put in 1~2 mixed flux [4.1) and cover with a lid. Place in a container with high temperature. Melt for 1min-30m at 0w11. Reverse the temperature. All melts can fall into the container. Cool. 6.5.2 Filter the outer wall and clean it. Put in 50ml of boiling water. Acid-free (/.2> and n0ml water in a 2cm2 cup, heat the sample until it is dissolved, wash with water, cool to room temperature, transfer to a 25cm2 volumetric flask, sieve with water, squeeze out, 6.5.3 According to the calcium content of the sample, take 5cm2 or 100cm2 of the sample according to Table 3. Put 100ml of the test solution in the hot cup, add 100ml of E5ml of the test solution (1.) Add enough E (410 and 101. Heat to 2 drops or 3 drops of 4.7. Add nitrogen water (4.3) to the test solution When blue appears, heat and cook for 3min.min., remove and cool to room temperature. 6.5.4 Add 15ml of six-base four-stream washing solution (/.6). Add 3 drops of the second medium (detection rate <4.5). First use 2 cone drops (4.11 drops to the near end point, then use 7-acid zinc standard (4.12) drops. The end point is when the yellow changes to red (do not remember the reading). 6.5.5 Add 1.13ul of chloride concentrate (4.5). Stir for 3min~5-in, cool and add 2 drops of medium. Add zinc acetate (4.12) to the standard solution until the red color is reached, and record the first standard solution. Select the sample (wAlr, x) and analyze the results. 7.1 Calculate the basic content of aluminum oxide according to formula (2): The product of the chemical solution (1.4) (5) and the product of the chemical solution (12) is: . In the formula: V.1: The volume of zinc acetate consumed in the titration test is the standard volume consumed by the zinc acetate solution, a single drop of zinc acetate consumed in the vacuum is 1.5V! Units are: 1 sample or · Units are g:
The amount of zinc acetate equivalent to the hydrogenated end is expressed as /ml. 7.2 Analysis of the collected
is carried out according to the provisions of 7.2 in G3/15060.1-2001. 7.3 Calculation of the results The arithmetic half of the effective analysis value of the sample is the most accurate. The results obtained should be rounded to one decimal place according to B/T81. The allowable difference of the analysis result is s
/mal+
2. nm-13. x.
2If, nn-39. x
>30, uo 50. x
>E0, 00~.80. X
GR/T 5069.7—2001
Maturity and risk
Test sample tolerance
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