GB/T 36167-2018Method for coal preparation laboratory timed-release flotation analysis (English PDF)

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009.

1 Scope

This standard stipulates that the coal preparation laboratory shall divide the pulverized coal (mud) into several parts with different ash according to its floatability through one rough selection and multiple selections. Test method of points.

This standard applies to bituminous coal and anthracite with a particle size of less than 0.5mm.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this document. For undated references, the latest edition (including all amendments) applies to this document.

GB/T 477 coal screening test method (GB/T 477-2008, ISO 1953:1994, MOD)

GB/T 4757 pulverized coal (mud) laboratory unit flotation test method

GB/T 30049 coal core coal sample optional test method

GB/T 34164-2017 Evaluation method for flotation process effect of coal preparation plant

3 Coal sample

For the production of coal samples, coal seam coal samples, coal core coal samples, coal preparation plant coal powder (mud) step-by-step release flotation test, according to GB/T 477, GB/T 30049 and GB/T 4757 regulations, shrinking 2kg ~ 3kg coal samples for testing.

4 Equipment, appliances and flotation agents

4.1 Flotation machine. in accordance with the provisions of GB/T 4757, the flotation tank volume is 1.5L.

4.2 Micro-syringe. volume 0.25mL, 0.5mL, graduation value 0.01mL.

4.3 Micro-injector. capacity 0.025mL, 0.05mL, graduation value 0.0005mL.

4.4 Collector. n-dodecane (chemical reagent) C12H26.

4.5 Foaming agent. octanol (chemical reagent) C8H17OH.

5 Fixed test conditions

5.1 Test water. tap water.

5.2 Slurry temperature. 20 °C ± 10 °C.

5.3 Flotation machine impeller speed. (1800 ± 10) r/min.

5.4 Bubbler speed. 30r/min.

5.5 Mixing time of slurry and collector. 2min.

6 Select test conditions

6.1 If the coal sample is not subjected to the flotation test in accordance with GB/T 4757, the selection conditions for the step-by-step release flotation test are as follows. […]