T/BYXT 112-2024 Aqua culture and rare earth zeolite purification agent

Scope

Scope: This document specifies the terminology definitions, basic requirements, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage, and sales and service requirements for rare earth zeolite purification agents. This document applies to aquaculture rare earth zeolite purification agents prepared from natural clinoptilolite as raw material; Main technical content: Physicochemical indicators shall comply with the requirements in Table 1: **Table 1: Indicator Requirements** **Grade** **Item** **Requirement** **Superior** **First-grade** **Ammonia Adsorption Value (mmol/100g)** ≥ 100.0 ≥ 95.0 **Particle Size (%)** ≤ 95.0 ≤ 90.0 **Dry Loss (Mass Fraction)** ≤ 6.0 ≤ 10.0 **Water Content (%)** ≤ 10.0 ≤ 12.0 **Solubility (%)** ≤ 50.0 ≤ 45.0 **Gas Effective Pore Size (μm)** ≥ 4.0 ≥ 6.0 **Water Absorption (%)** ≤ 60.0 ≤ 55.0 **Mineral Element Content** Alumina (Al2O3) ≥ 7.0 ≥ 6.5 Silica (SiO2) ≥ 50.0 ≥ 45.0 Potassium (K2O) ≥ 4.6 ≥ 4.0 Sodium (Na2O) ≥ 0.45 ≥ 0.4 Calcium (CaO) ≥ 2.3 ≥ 2.3 Magnesium (MgO) ≥ 2.0 ≥ 1.6 Zinc (ZnO) ≥ 1.0 ≥ 0.8 Iron (Fe2O3) ≥ 0.65 ≥ 0.6 Manganese (MnO) ≥ 1.0 ≥ 0.8 Rare Earth Elements (REO) ≥ 10.0 ≥ 8.8 **pH Value** 5.5–7.0 a  The content of zeolite and the ammonia adsorption value are linearly related. According to industry practice, the zeolite content in the product is determined by measuring the ammonia adsorption value. b  The particle size is calculated by passing through a 0.9mm test sieve.

Development Information

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