This part of GB/T 5070 specifies the method for determining the amount of alumina by the EDTA volumetric method. This part is applicable to the determination of the amount of alumina in magnesia-chromium refractories. The determination range (mass fraction) is 2.00% to 20.00%. GB/T 5070.4-2002 Chemical analysis methods for magnesia-chromium refractories Part 4: Determination of alumina by the EDTA volumetric method GB/T5070.4-2002 Standard download decompression password: www.bzxz.net

rs s1, cec
National Standard of the People's Republic of China
GB/T5070.1~5070.12——2002
Replacement GB/T 5070.1~507(, 1m1985 Chemical analysis of nagnesia chromite refractories2002-12-31Promulgated
People's Republic of China
National Quality Supervision and Inspection General
2003-0601Implementation
Ic 81.c80
National Standard of the People's Republic of China
GB/T5070.4—2002
代/5,—85
Chemical analysis of magnesia-chromium refractories
Part 4: Determination of aluminium oxide--EDTA volunietric method2002-12-31 Issued byWww.bzxZ.net
People's Republic of China
General Administration of Quality Supervision, Inspection and Quarantine
200306-01 Implementation
GB/T5370.4—2002
GH15 Analysis methods for quality control of forest materials The following parts are included: Part 1: Determination of the quality of the product by quality control method: Part 2: Determination of the quality of the product by quality control method: Part 3: Determination of the quality of the product by quality control method: Part 4: Part 5: Determination of the content of titanium dioxide in monoamine by spectrophotometry: Part 6: Determination of the content of calcium chloride by EGTA: Part 7: Determination of the content of calcium chloride by IXIA volumetric method: Part 8: Determination of the content of magnesium oxide by F17TA volumetric method: Part 1: Determination of the content of zirconium dioxide by iron phosphate method: Part 2: Determination of the content of zinc oxide by ferric iodide by iodine Part 11: Determination of chemical content of refractory materials by atomic absorption spectrophotometry: Part 2: Determination of chemical content of refractory materials by atomic absorption spectrophotometry, Part 4: GH117; This part replaces B/57.1-93 Refractory materials by single analysis method EA container type determination of aluminum content. The main changes between Part 3 and G/T.43 are as follows: "front", "reference", "quality and testing" and "test" are added. "Test report"; Detailed provisions on sample preparation were made. Other provisions were added: Part 1 of the nuclear work rules, Part 1 of the standard writing rules, Part 4: Chemical analysis rules, and the structure and format of the standard were summarized in the appendix. The core part is the national industrial license.
Part 4: FTA volumetric method for determination of the amount of aluminum content in the raw materials GB/T 5070.4.-20C2
This part is used for the determination of the amount of aluminum content in the raw materials. 1 The quality score is greater than 2.(0%~.2.). 2 Normative references
The following documents are applicable to the use of this part of 5070 or the standard clauses of this part. The latest version of the documents (not including errata) is not applicable to this part. However, all parties involved in the operation of this part are encouraged to confirm whether the latest version of these documents is applicable to the product.
GB [5070.1-3002 Chemical analysis methods for refractory materials Part 1: Three Quantity method Xie Zhuo Fan reduction 181 numerical chain about rules
GBT10325 complete shape fire products cat detailed acceptance heat rules 3 doors 128 real firm compensation false mention burette
GR/138F laboratory fee still instrument single mark line wear and bottle GBT128U8 coke test child stock full slow meter single mark line no sound when the fire flow and technical shape refractory material take machine
3 principle
the sample is illuminated by magnetic limit sodium period reduction agent, olefin preacid no stock, after temperature alkaline buy high frequency tree tire static exchange Ming (let recognize LT, non-adsorption resin after the upstream separation: read when bitter or not Acid I cover. In the presence of an excess of IA, add 34% to make the total amount of iron ion A, add three times the base solution, use the orange light as an indicator to titrate the zinc standard, then titrate the EDTA with the aluminum complex with the highest acetic acid standard to obtain the actual chemical concentration 4 test instrument
4.1 Mud mixture: Take 2 parts of anhydrous acid and 1 part of pulverized acid and mix them in a furnace! . 4.2717 City certificate anion exchange nucleus: First use the public point hair product to wash, you can use water to promote the change, with the required salt (c.5ml:1.~【m/[effective 3 times. 1b--2a and then wash, and then wash with water until the product is as white as before.
4.3 New makeup.
4.4 Section 1/1 acid solution: heat solution
4.5 Six times of Niu Lai four glue absolute penetration rate p5.5): weigh 2 six times of the country F beaker, add water solution. 40ml! Salt (.1.1u8/ml.), add water single 1000ml. Standard 4.6HTA full liquid / I1.
1.7 two water ml).
4. Difference (1+1)
CR/I 5070.4—2002
2.9 (0.5-39.3)
4.10 Hydrochloric acid (11)
4.11 Normalized aluminum (1/2A10.) 0.2ml/1. Take 0.5 aluminum (state.%), add 20% water and 4% ethylene to the bottle, add acid to the solution until it is neutral, then, hot 1 ~2! To the liquid sewage, cool to room temperature and transfer to [0I guest version (4.17), water tax to the temperature: 412Z select standard full liquid ZCHDO-1. and (H =, 2.4, 12, 1 preparation
according to Table 1, weigh acetic acid, respectively, in 1000 =. water month ice acetic acid room temperature liquid H is:. F~i.1. a
r[n(c:H, 4.12.2 Calibration method 1.16) Take 3 portions of the lead ions solution (1.11) and place them in a 400 ml beaker. Add 1.62 ml of water to about 100 ml and heat to 7-80 °C. Add 2 drops of 1,2-diol blue solution (4.3), adjust the color to blue (4.4) and heat to 3-5 min. Cool to room temperature and proceed according to 6.5.2-6.5.3. Record the volume of the second calibration beaker with the standard titration solution (4.12). The difference in the amount of zinc sulfate (mL) consumed by the three samples of standard chemical solution shall not exceed 0.10 ml. Otherwise, the three samples shall be recalibrated. Table 2
2rcc,c>/mn/;
4.12.3 Single chemical analysis and standard (4.11)/m
F, rin
FT)TA solution (4.6:ml.
ZnO2 solution is the most liquid substance [Zn+H, COO, the value is expressed in m/L, according to formula 1):
fZCH.nJ-
To determine the concentration of aluminum, the unit is the rate of transfer (mul/liter) of the standard solution (.11):..............()
V:: Titrate 3 parts of aluminum oxide The average consumption of the standard aldehyde solution (.12) in the standard container is estimated in units of complete liters (al.
The calculation result is expressed as a valid number of measurement positions.
6,13 Cooling solution K/1
before the transfer of the color, can be used in the state
4.15 Liquid tube: G[3/T12808A
2.16 Burette: GB/T128C5A.
4.17 Volumetric bottle: GET128C6A
5 Sampling
5.1 Sampling steps
According to B/T1U325 and GB/T17617, the experimental sample is collected. 5.2 Sample preparation
According to GB/T 507u.1-2002, 5.2 Test preparation
5.1 Determination of micro-
Product quality
2 Sample quantity
You withdraw about c. 25 samples, accurate to 0.1K
6.3 Blank test
Carry out blank test under non-polyester conditions,
5.4 Verification test
Under the condition of heavy support, push the material into the type machine with the real sample, 6.5 Determination
GB/T5070.4-2302
6. 5.1 Use enough liquid to make the general <4. 1. Transfer 31. 1r1. 7. 3. Flow 4. Place 13 ml. cup, add 1 ml of acetic acid solution (1.4) and mix with sufficient EDTA solution (4.6). Heat to 70-30°C. Add 2 titers of pre-yield solution (4.13) and adjust the blue color with chlorine water (4.). Heat for min~.5min. Remove and finally return to room temperature.
6.5.2 Add 15 ml of hexadecene tetramine to 11.5, add 3 ml of clear orange solution (1.11). Use ethyl zinc standard solution (1.12) until the solution changes from yellow to red (do not record the effect). 6.5.3 Add ammonium chloride (4.231 g 3tlin--min cooling room channel. Add 2 standard vegetables in the middle 14.14). Pressurize zinc ethyl solution to standard flow rate and discard 4.12) Normalize aluminum content (mass fraction, use ZCH) 0.U1mrl/standard titration solution: When the mass fraction of aluminum content is 3%: use Z (H center, m's standard titration solution. The titration rate test wave turns to white, which is the flash point:
7 Analysis result calculation
The aluminum content is calculated by mass fraction wA center>, the value is expressed in %, and it is calculated according to formula (2): f1
Alhc0)-YY- 00Mx100
Wherein:
The volume rate value of the standard solution consumed by the titration test solution 1..2), unit is liter (ml, 1W.
The titration air 1 consumed by the titration test solution 7. The waste test you gradually titrated the rate of 4.2) of the forest; the number of hundreds. The unit price is the kettle open (ml.); the zinc standard concentration is determined by the exact number of grams per ([/1.M
A, the rate of grams of mass layer energy, represented by the point rate gmrM101.1 The mass of the sample is taken at the lowest point, unit is gram (). i1:
7.2 The analysis should be valid. The analytical value of the standard material should be repeated at the same time as the standard value. The reference material can be marked with a larger interval, but the interval is not too long. If the interval is not too long, the analysis is valid. 7.3 When the valid analytical value of the sample does not exceed the specified interval in Table 3, the final analytical result should be calculated based on the average value. 7.4 If the interval is less than 7.5, the new analytical value should be added in Appendix A. The result should be adjusted to the minimum value according to 7B817. When the relevant standards are in compliance, the values ​​of the two independent test results obtained under repeatability conditions should not be greater than the allowable differences listed in 3, Table 3. 2. cx-~ 5. u 9 Quality assurance and control 9.1 Verification tests should be carried out as per S.4. 9.2 Under normal circumstances, the accuracy of the test should be recalibrated once a month; if the accuracy changes more than 1u within two months, it should be recalibrated in time. 10 Test report The test report should include the following contents: Commissioning unit: Sample name!
Expansion results:
GB4
- The difference with the specified step strength (if necessary, in the test plan of the original test phenomenon (if necessary: ​​- test the date,
line 1,
enter 5,
1,1 take the benefit
+.—Analysis information:
- Table 3 allows the effectiveness of the preparation,
Appendix A
(Normative Appendix)
Acceptance analysis value rental sequence
XI. +2, Y1
GB/T S070, 4—20D2Y1
GB/T S070, 4—20D2Y1
GB/T S070, 4—20D2
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