T/CPFIA 0009-2023 The production of soil conditioner from phosphoric acid gypsum

Scope

Main technical content: 4.1 Appearance: Powder or granular form, free from mechanical impurities. 4.2 Technical requirements: Phosphogypsum soil conditioners shall comply with the technical indicators in Table 1 and meet the requirements specified on the packaging label. Table 1 Technical Indicators of Phosphogypsum Soil Conditioners Parameter Technical Indicator Calcium content (calculated as Ca, dry basis) ≥14.0% Sulfur content (calculated as S, dry basis) ≥11.0% Water-soluble fluoride content (calculated as F, dry basis) ≤0.2% Sodium (Na) content ≤0.2% pH (diluted 1:250) 3.0–9.0 Note: The moisture content shall be subject to the contractual agreement between the supplier and the purchaser. 4.3 Limit requirements: The limit requirements for arsenic, cadmium, chromium, lead, mercury, and thallium in phosphogypsum soil conditioners shall comply with the provisions in Table 2. Table 2 Limit Requirements for Toxic and Harmful Substances Parameter Limit Value Total arsenic ≤50 mg/kg Total cadmium ≤10 mg/kg Total chromium ≤500 mg/kg Total lead ≤200 mg/kg Total mercury ≤5 mg/kg Total thallium ≤2.5 mg/kg

Development Information

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