GB/T 10515-2012Determination of particle size for nitrophosphate (English PDF)

Foreword

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 10516-2012 "nitrate fertilizer particles have an average crush strength of determination."

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

This standard replaces GB/T 10515-1989 "Nitrophosphates size determination."

The main differences between this standard and the 1989 version are.

--- By a particle size range 1.00mm ~ 4.00mm to 1.00mm ~ 4.75mm.

The standard proposed by China Petroleum and Chemical Industry Association.

1 Scope

This standard specifies the determination of granular fertilizer nitrate, P and K particle size by sieving.

This standard applies to all kinds of technology, the granular fertilizer nitrate, P and K Determination of particle size.

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.

GB/T 6003.1-1997 woven wire mesh test sieve (eqvISO 3310-1.1990)

3 Principle

By sieving method, particulate nitrate fertilizer, P and K nitrate into different particle diameters, weighing, calculate the mass fraction.

4 Instrument

4.1 Usually laboratory instruments.

4.2 balance, a sense of the amount of 0.5g.

4.3 test sieve (GB/T 6003.1-1997R40/3 series). a pore diameter of 1.00mm, 2.00mm, 2.80mm, 4.75mm sieve of Sub-set, with screen cover and chassis.

4.4 Sieve shaker.

5 Steps

Press sieve 1.00mm, 2.00mm, 2.80mm and 4.75mm aperture sequentially folded from the bottom, saying that reduction of sub-sample taken after About 200g, accurate to 1g, pore size is placed on the 4.75mm sieve, sieve cover lid placed on the sieve shaker, clamping, vibration 5min, will not By weighing the sample aperture 4.75mm sieve and chassis, caught in the mesh of the sieve through which particles are not counted. Reserved 2.00mm aperture Sample sieve, as the average particle crush strength measurement.

NOTE: If there is no vibration sieve, vibrating sieve can be used manually, but using a sieve shaker arbitration.

6 Expression analysis

Phosphate nitrate, P and K in size (w), to 1.00mm ~ 4.75mm accounted sample particle mass fraction, in% Table Shows, according to equation (1).