T/CRRA 9923-2025 Active Group standards

T/CRRA 9923-2025 The technical specifications for high-temperature reduction of chromium-contaminated soil to produce ceramic particles

Publish Date: 2025-01-17 Implement Date: 2025-01-24 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

Price: $ 20.00

Out of stock

Basic Information

Standard Code: T/CRRA 9923-2025

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: Environmental protection

ICS Name: Pollution, pollution control, and protection

Publish Date: 2025-01-17

Implement Date: 2025-01-24

Scope

Scope: This document specifies the general requirements for the high-temperature reduction of chromium-contaminated soil into ceramic granules, including storage, pretreatment, high-temperature reduction, product quality, and other aspects. This document applies to the remediation of contaminated soil at the sites of closed chromium salt factories. Other chromium-related industries such as electroplating and tanning can refer to this document for implementation. Main technical content: The standard includes the following five chapters: Chapter IV: General Requirements: This section stipulates that when transferring chromium-contaminated soil to ceramic granule production enterprises for remediation, the transfer process and auxiliary materials/fuels used should comply with the "Measures for the Environmental Management of Contaminated Land" and meet environmental, health, and safety requirements. Based on factors such as soil texture and pollutant content, the specific process parameters including auxiliary material addition ratio, curing time, sintering to produce ceramic granules, and cooling should be optimized and adjusted. Secondary pollution prevention facilities should be installed, and all requirements related to environmental discharge and monitoring must be strictly adhered to. Chapter V: Storage: This section requires that ceramic granule production enterprises have independent reception and storage facilities for chromium-contaminated soil, set up dedicated inlets and metering facilities for contaminated soil, and install vehicle washing systems to separate people from contaminated soil. The storage facilities should meet operational requirements such as good anti-seepage and rainproof functions, measures to prevent contaminated soil from being dispersed or lost, and so on. Chapter VI: Pretreatment: This section provides pretreatment process and parameters based on the mineral composition and hexavalent chromium and total chromium content of t