YB/T 105-2014Methods of physical testing for metallurgical lime (English PDF)

4.1 Principle

Hydrate a certain amount of the specimen. At the same time, use a certain concentration

of hydrochloric acid, to neutralize the calcium hydroxide produced during the lime

hydration process.

4.2 Reagents

4.2.1 Hydrochloric acid (4 mol/L).

4.2.2 Phenolphthalein indicator solution (5 g/L). Weigh 0.5 g of phenolphthalein. Add

4.3 Test equipment and tools

4.3.1 Jaw crusher 60 mm × 100 mm.

4.3.2 Sampling sieve. 1 mm and 5 mm round hole sieve.

4.3.3 Ground mouth bottle. 500 mL.

4.3.8 Dryer. The diameter is 250 mm.

4.3.9 Beaker. 3000 mL.

4.3.10 Graduated cylinder. 2000 mL.

4.3.11 Burette. 500 mL, minimum scale not larger than 1 mL.

4.3.12 Thermometer. The maximum temperature is 100 °C; the scale is not greater than

4.3.13 Dropper bottle. 50 mL.

4.3.14 Stopwatch (or timer).

4.3.15 Stirrer.

4.3.15.1 The power is not less than 100 W.

4.3.16 Metallurgical lime reactivity automatic detector

4.3.16.1 Timing accuracy. 0.5 s.

4.3.16.2 Liquid level meter measurement accuracy. 0.05%.

4.3.16.3 Titration accuracy. 0.5 mL.

4.3.16.4 pH value detector. 0 ~ 14, resolution 0.01.

4.3.16.5 Mixer speed. 250 r/min ~ 300 r/min.

4.3.16.6 Equipped with constant temperature water outlet.

4.4 Specimen

4.4.1 Specimen size

Follow the provisions of YB/T 042.

4.4.2 Specimen preparation method

Crush the sample, until it passes through a 5 mm sieve. Then use a 1 mm sieve to remove

the fine powder. Mix thoroughly and separate out about 500 g using the sample

reduction method. Store it in a labeled ground-mouth bottle, for later use.

4.5 Test procedures

4.5.2 Automatic hydrochloric acid titration method

4.5.2.1 Turn on the hot water heater. (After the temperature reaches the requirement)

automatically inject 2000 mL of 40 °C ± 1 °C hot water, into the 3000 mL beaker.

4.5.2.2 Start the equipment and the stirring paddle will turn on automatically. The

system enters the test state. The pH value detector detects the pH value. It controls the

pH value to 7.0 ± 0.1.

4.6 Calculation of results

4.6.1 If the results of two independent measurements of the same specimen are not

greater than the allowable difference (see 4.6.2), THEN take the arithmetic mean as the

test result. If the results of two independent measurements are greater than the allowable

difference, increase the number of tests and determine the test results as specified in

Appendix A. The test results are rounded to integers, in accordance with GB/T 8170.

4.6.2 Allowable difference

The absolute value of the difference -- between two independent measurement results

of the same specimen -- shall not be greater than 4% of the average value.

5.1 Key points of method

The specimens are classified for particle size, according to the prescribed sieve mesh

and operating methods. The test results are expressed as the percentage of the quality

of each particle size.

5.2 Test equipment and tools

5.2.1 Square hole sieve. The sieve hole specifications and size deviations comply with

GB/T 6003.The size of the sieve surface is approximately 800 mm × 600 mm; the

height of the sieve frame is approximately 120 mm; handles are installed at both ends

of the sieve frame.

5.3 Specimens

Follow the provisions of YB/T 042.

5.4 Screening steps

5.4.1 The specimen is screened from large holes to small holes. The height of the sieve

from the ground, steel plate or receiving plate shall not exceed 200 mm.

5.4.5 Combine the material above the sieve into the picked lime blocks. Use the same

method for the lime under sieve, to continue to sieve it on the smaller sieve in the

selected series of sieves. The following is same, until the screening is completed.

5.4.6 The screening end point shall be implemented, in accordance with the relevant

provisions of GB/T 2007.7.

5.4.7 Weigh and record the various levels of screened lime products.

5.5 Result calculation

Add up the mass of each level of lime samples. The difference -- between the total mass

and the mass of the original specimen -- shall be within 1.5% of the mass of the original

specimen. Otherwise, the test will be invalid. Loss of lime is calculated at the smallest

level.

5.6 Allowable difference

See Table 1, for allowable differences.

YB/T 105-2014

YB

FERROUS METALLURGICAL INDUSTRY STANDARD

ICS 73.080

D 52

Replacing YB/T 105-2005

Methods of physical testing for metallurgical lime

Issued on. MAY 06, 2014

Implemented on. OCTOBER 01, 2014

Issued by. Ministry of Industry and Information Technology of PRC

Table of Contents

Foreword... 3

4.1 Principle

Hydrate a certain amount of the specimen. At the same time, use a certain concentration

of hydrochloric acid, to neutralize the calcium hydroxide produced during the lime

hydration process.

4.2 Reagents

4.2.1 Hydrochloric acid (4 mol/L).

4.2.2 Phenolphthalein indicator solution (5 g/L). Weigh 0.5 g of phenolphthalein. Add

4.3 Test equipment and tools

4.3.1 Jaw crusher 60 mm × 100 mm.

4.3.2 Sampling sieve. 1 mm and 5 mm round hole sieve.

4.3.3 Ground mouth bottle. 500 mL.

4.3.8 Dryer. The diameter is 250 mm.

4.3.9 Beaker. 3000 mL.

4.3.10 Graduated cylinder. 2000 mL.

4.3.11 Burette. 500 mL, minimum scale not larger than 1 mL.

4.3.12 Thermometer. The maximum temperature is 100 °C; the scale is not greater than

4.3.13 Dropper bottle. 50 mL.

4.3.14 Stopwatch (or timer).

4.3.15 Stirrer.

4.3.15.1 The power is not less than 100 W.

4.3.16 Metallurgical lime reactivity automatic detector

4.3.16.1 Timing accuracy. 0.5 s.

4.3.16.2 Liquid level meter measurement accuracy. 0.05%.

4.3.16.3 Titration accuracy. 0.5 mL.

4.3.16.4 pH value detector. 0 ~ 14, resolution 0.01.

4.3.16.5 Mixer speed. 250 r/min ~ 300 r/min.

4.3.16.6 Equipped with constant temperature water outlet.

4.4 Specimen

4.4.1 Specimen size

Follow the provisions of YB/T 042.

4.4.2 Specimen preparation method

Crush the sample, until it passes through a 5 mm sieve. Then use a 1 mm sieve to remove

the fine powder. Mix thoroughly and separate out about 500 g using the sample

reduction method. Store it in a labeled ground-mouth bottle, for later use.

4.5 Test procedures

4.5.2 Automatic hydrochloric acid titration method

4.5.2.1 Turn on the hot water heater. (After the temperature reaches the requirement)

automatically inject 2000 mL of 40 °C ± 1 °C hot water, into the 3000 mL beaker.

4.5.2.2 Start the equipment and the stirring paddle will turn on automatically. The

system enters the test state. The pH value detector detects the pH value. It controls the

pH value to 7.0 ± 0.1.

4.6 Calculation of results

4.6.1 If the results of two independent measurements of the same specimen are not

greater than the allowable difference (see 4.6.2), THEN take the arithmetic mean as the

test result. If the results of two independent measurements are greater than the allowable

difference, increase the number of tests and determine the test results as specified in

Appendix A. The test results are rounded to integers, in accordance with GB/T 8170.

4.6.2 Allowable difference

The absolute value of the difference -- between two independent measurement results

of the same specimen -- shall not be greater than 4% of the average value.

5.1 Key points of method

The specimens are classified for particle size, according to the prescribed sieve mesh

and operating methods. The test results are expressed as the percentage of the quality

of each particle size.

5.2 Test equipment and tools

5.2.1 Square hole sieve. The sieve hole specifications and size deviations comply with

GB/T 6003.The size of the sieve surface is approximately 800 mm × 600 mm; the

height of the sieve frame is approximately 120 mm; handles are installed at both ends

of the sieve frame.

5.3 Specimens

Follow the provisions of YB/T 042.

5.4 Screening steps

5.4.1 The specimen is screened from large holes to small holes. The height of the sieve

from the ground, steel plate or receiving plate shall not exceed 200 mm.

5.4.5 Combine the material above the sieve into the picked lime blocks. Use the same

method for the lime under sieve, to continue to sieve it on the smaller sieve in the

selected series of sieves. The following is same, until the screening is completed.

5.4.6 The screening end point shall be implemented, in accordance with the relevant

provisions of GB/T 2007.7.

5.4.7 Weigh and record the various levels of screened lime products.

5.5 Result calculation

Add up the mass of each level of lime samples. The difference -- between the total mass

and the mass of the original specimen -- shall be within 1.5% of the mass of the original

specimen. Otherwise, the test will be invalid. Loss of lime is calculated at the smallest

level.

5.6 Allowable difference

See Table 1, for allowable differences.

......