GB 10515-1989 in English

GB 10515-89 Standard Overview

GB 10515-89 is an important standard for the particle size determination of granular nitrophosphate fertilizers in my country, which stipulates the method and requirements for particle size analysis using the sieving method. This standard is applicable to granular nitrophosphate fertilizer products of various production processes, and provides a technical basis for ensuring fertilizer quality and market circulation.

Background and Significance of Standard Formulation

The formulation of GB 10515-89 standard stems from the strict requirements for particle size uniformity during the production and use of granular fertilizers. Too large or too small particles will affect the application effect of fertilizers and the operating efficiency of mechanical equipment, so a unified standard method is needed to evaluate and control product particle size.

Comparative analysis of standard frameworks

Determination method and steps

GB 10515-89 standard specifies detailed sieving method determination steps, including sample preparation, instrument preparation, sieving operation and result calculation:

1. Weigh about 200g of laboratory sample, accurate to 1g.
2. Place the sample on a 4.0mm pore size experimental sieve and use a sieve vibrator for vibration sieving for 5 minutes.
3. Collect the particles that do not pass through the 4.0mm sieve and the sample on the bottom plate, and weigh their total mass (m1), accurate to 1g.
4. Calculate the particle size D value, the formula is: D = [(m0 - m1)/m0] × 100, where m0 is the initial mass of the sample and m1 is the sum of the masses that do not pass through the sieve.

Instrument requirements and technical specifications

The standard clearly requires the use of experimental sieves (R40/3 series) that comply with GB 6003, with apertures of 1.0mm, 2.0mm, 2.8mm and 4.0mm respectively. At the same time, it is recommended to equip a vibrator to improve screening efficiency and accuracy. If there is no vibrator, manual screening can be used as an alternative, but mechanical vibration equipment must be used during arbitration.

Technical evolution and optimization of the standard

Since the release of GB 10515-89, technological advances in the fertilizer industry have promoted the improvement of particle size determination methods. For example, modern laboratories have widely adopted automated screening equipment and precision weighing instruments to improve detection efficiency and accuracy. Future revisions to the standard may focus more on the application of digital measurement and data analysis.

Implementation suggestions and precautions