GB/T 10516-2012Determination of average crushing strength for nitrophosphate (English PDF)

Foreword

This standard rule according to GB/T 1.1-2009 given draft.

This standard is one nitrate fertilizer, P and K series of standard test methods for nitrate, which are listed below national standards.

--- GB/T 10511-2008 "After distillation of total nitrogen content for nitrophosphate titration method";

--- GB/T 10512-2008 "nitrate fertilizer phosphorus content - Quinoline phosphomolybdate gravimetric method";

--- GB/T 10513-2012 "nitrophosphate determination of water content Karl Fischer method";

--- GB/T 10514-2012 "nitrophosphate determination of water content - Oven method";

--- GB/T 10515-2012 "Nitrophosphates Determination of particle size."

This standard replaces GB/T 10516-1989 "nitrate fertilizer particles have an average compressive strength determination."

The standard proposed by China Petroleum and Chemical Industry Association.

1 Scope

This standard specifies the method for determination of particulate nitrate fertilizer, P and K nitrate particles having an average crush strength.

This standard applies to all kinds of technology, the nitrate granular fertilizer, P and K determination of nitrate particles having an average crush strength.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated edition applies to this article Member. For undated references. The latest edition (including any amendments) applies to this document.

Determination of GB/T 10515 Nitrophosphates granularity

3 Principle

Select a certain size, the number of particles of phosphorus and potassium nitrate or nitric acid phosphate, measured crush strength of each one nitrophosphate averaged.

4 Instrument

4.1 usually laboratory instruments.

4.2 Crush strength tester. Sensitivity 0.5N.

5 Steps

Take Press GB/T 10515 Determination 2.00mm 2.80mm particle size between the time ~ 30 randomly selected, one by one to determine particle Anti-crushing force.

6 Expression analysis

P and K fertilizer nitrate or nitrate particles having an average crush strength (N), according to equation (1).

Where.

Numerical crush strength of Ni --- each particle, in Newtons (N).

Results reserved to one decimal place.