GB12434-2008

Regulations of dust control for refractory enterprises

耐火材料企业防尘规程

GB 12434-2008 é uma norma nacional chinesa obrigatória vigente: Regulations of dust control for refractory enterprises. Setor: Alimentos. Foco: Segurança de produtos. Entrada em vigor: 1 de dez. de 2009.

A aplicabilidade depende do escopo do produto, da via de certificação, dos avisos da autoridade competente e das regras de transição. Solicite uma tradução ou verifique a fonte antes de usar este registro em uma decisão de conformidade.

Visão geral de conformidade

Esta visão geral está disponível por enquanto apenas em inglês.

Escopo e aplicabilidade

This standard specifies the basic requirements and comprehensive dust control measures for refractory enterprises. It is applicable to the design and management of dust prevention in facilities producing refractory materials, including processes like firing, crushing, and molding. It is mandatory for all new, expanded, or reconstructed refractory manufacturing projects in China. The standard replaces the previous GB 12434-1990.

Requisitos técnicos

The standard outlines comprehensive requirements for plant architecture and production processes to minimize dust generation. It mandates that dust control facilities must be designed, constructed, and operated simultaneously with the main production equipment. Facilities must feature smooth internal walls and floors with water flushing capabilities, where applicable, to prevent dust accumulation. For production equipment, the standard requires the adoption of mechanized, enclosed, and continuous processes to reduce material drops and transfer points. Manufacturers must implement electrical interlocking between production and dust removal equipment. Specific requirements are detailed for various stages, including raw material crushing, milling, molding, and firing, emphasizing localized exhaust ventilation and strict enclosure of dust-generating machinery. The standard specifies design criteria for dust removal systems, including air volume, velocity, and the selection of high-efficiency equipment such as bag filters. It also establishes strict management protocols, requiring regular maintenance and annual performance testing. Enterprises must ensure workplace dust concentrations remain within specified permissible limits for hazardous substances like silica and aluminum dust.

Métodos de ensaio

The standard outlines evaluation procedures primarily focusing on the operational performance of dust control systems rather than specific laboratory material tests. Key assessments include verifying the air volume and velocity at dust generation points, measuring the efficiency of high-efficiency dust collectors (e.g., bag filters), and conducting annual operational condition testing of the dust removal equipment. Additionally, workplace air quality must be monitored to ensure compliance with the permissible concentration limits for total and respirable dust, particularly for crystalline silica and other hazardous particulates.

Perguntas frequentes

What products and facilities are regulated under GB 12434-2008?

GB 12434-2008 applies specifically to refractory enterprises, covering the design and management of dust prevention in facilities manufacturing non-metallic materials for high-temperature environments. It is mandatory for all new, expanded, or technologically transformed refractory plants.

Are there any significant updates from the previous version of this standard?

Yes, compared to GB 12434-1990, this version introduces a dedicated chapter for terms and definitions. It also restructures the comprehensive technical measures into separate chapters for plant architecture, production processes, main process dust control, and dust removal system design. Some previously mandatory clauses have been adjusted to recommended status.

Does the standard specify limits for hazardous dust like silica?

Yes, the standard includes a table specifying the time-weighted average permissible concentrations for various dusts in workplace air. This includes strict limits for silica dust (based on free SiO2 content), aluminum dust, and silicon carbide dust, categorized into total dust and respirable dust. Compliance with these exposure limits is mandatory for occupational health.

The summary above provides a high-level overview of GB 12434-2008. To ensure complete compliance for your refractory manufacturing facilities entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 12434-2008 today to access all detailed parameters, dust concentration tables, and specific equipment requirements.

Indicações de aplicabilidade

Tipo: Segurança
CCS: C70
ICS: 13.100
Órgão competente: National Health Commission
Comitê técnico: National Health Commission

Relações

Substitui:GB 12434-1990