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GB 46790-2025Emission standard of air pollutants for refractory industry (English PDF)

耐火材料工业大气污染物排放标准

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Issued by

SAMR; SAC

Level / Type

National · Mandatory

Issue date

October 31, 2025

Implementation date

May 1, 2026

Scope

GB 46790-2025 is the English-translated version of 耐火材料工业大气污染物排放标准.

GB 46790-2025 is the Chinese emission standard for air pollutants from the refractories industry, effective 1 January 2026. Refractory production is a kiln industry: it fires clay, magnesia, alumina and graphite at high temperature, and it emits particulates, sulfur dioxide, nitrogen oxides and fluorides. Until now the sector was covered by general industrial limits; this standard gives it its own. It sets the emission control requirements for the organised and fugitive releases, the monitoring requirements and the rules for implementation and supervision, and it applies both to existing plants and to the environmental impact assessment, the design of the abatement plant and the completion acceptance of new ones. For a refractories producer, a kiln builder or an abatement supplier working in China, this is the text an environmental permit and an inspection are based on.

Document preview — GB 46790-2025

National Standard of the People's Republic of China

ICS: 13.040.40
Classification: Z60

Issued by: the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China

Foreword
1 Scope
2 Normative References
3 Terms and Definitions
4 Water Pollutant Discharge Control Requirements
5 Water Pollutant Monitoring Requirements
6 Specifications for Wastewater Discharge Outlets
7 Implementation and Supervision1 Scope

Foreword

This document was issued on 31 October 2025 by the the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China and takes effect on 1 May 2026.

It is a GB standard without the /T suffix: compliance is mandatory in China.

The document runs to 15 pages in translation. The identification, the dates, the table of contents and the clauses reproduced on this page are taken from the standard itself.

GB 46790-2025 Emission standard of air pollutants for refractory industry English, Anglais, Englisch, Inglés, えいご

2 Normative References

The following documents, or the clauses cited therein, are referenced in this standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including all amendments) applies. If other documents are superseded, modified, or revised by new ones, the new documents apply.

GB 37822 Standard for fugitive emission control of volatile organic compounds

GB/T 4754-2017 Industrial Classification for National Economic Activities

GB/T 15516 Ambient Air — Determination of Formaldehyde — Acetylacetone Spectrophotometric Method

GB/T 16157 Determination of Particulates and Sampling Methods of Gaseous Pollutants from Exhaust Gas of Stationary Sources

GB/T 16758 Classification and technical requirements of exhaust hoods

HJ/T 32 Stationary Source Emission — Determination of Phenolic Compounds — 4-Aminoantipyrine Spectrophotometric Method

HJ 38 Stationary Source Emission — Determination of Total Hydrocarbons, Methane and Non-methane Hydrocarbons — Gas Chromatography

HJ/T 42 Stationary Source Emission — Determination of Nitrogen Oxides — Ultraviolet Spectrophotometric Method

HJ/T 43 Stationary Source Emission — Determination of Nitrogen Oxides — Hydrochloric Naphthylethylenediamine Spectrophotometric Method

HJ/T 45 Stationary Source Emission — Determination of Asphalt Smoke — Gravimetric Method

HJ/T 55 Technical Guidelines for Fugitive Emission Monitoring of Air Pollutants

HJ/T 56 Stationary Source Emission — Determination of Sulfur Dioxide — Iodometric Method

HJ 57 Stationary Source Emission — Determination of Sulfur Dioxide — Constant Potential Electrolysis Method

HJ/T 67 Stationary Source Emission — Determination of Fluorides — Ion Selective Electrode Method

HJ 75 Specifications for Continuous Emissions Monitoring of Flue Gas Emitted from Stationary Sources (SO2, NOx, Particulates)

HJ 1330 Stationary Source Emission — Determination of Ammonia and Hydrogen Chloride — Portable Fourier Transform Infrared Spectroscopy Method

HJ 1331 Stationary Source Emission — Determination of Total Hydrocarbons, Methane and Non-methane Hydrocarbons — Portable Catalytic Oxidation-Hydrogen Flame Ionization Detector Method

3 Terms and Definitions

For the purposes of this standard, the following terms and definitions apply.

3.1 refractory industry

The industry involved in producing refractory raw materials and products from natural ores or other materials through single or combined processes such as crushing, calcining, proportioning, mixing, shaping, drying, firing (electrofusion), and processing. It includes Manufacture of Refractory Ceramic Products and Other Refractory Materials (C3089) in GB/T 4754-2017; fire clay, calcined fire clay, and other refractory earth and stone within Mining of Refractory Clay and Stone (B1013); magnesite mining (B0917); and refractory raw materials and products within Manufacture of Other Non-metallic Mineral Products (C3099).

3.2 refractory

Inorganic non-metallic materials with physical and chemical properties suitable for use at high temperatures, though certain products may contain a certain amount of metallic materials.

Common types include silica, fireclay, high-alumina, chrome, magnesia, dolomite, carbon, zirconia refractories and composite refractories composed of these materials, as well as special refractories made from oxides, nitrides, borides, carbides, silicides, etc.

3.3 refractory product

Various products made from refractory raw materials, including shaped products such as various refractory bricks, refractory ware, etc., and unshaped products such as castables, mortars, etc.

3.4 tunnel kiln

A continuous kiln for firing refractories, built with refractory materials, insulating materials, and building materials, shaped like a tunnel, and equipped with kiln cars or other conveying devices. It also includes roller hearth kilns where rotating rollers serve as the carrier for the ware, and pusher slab kilns where slabs serve as the carrier.

3.5 shuttle kiln

An intermittent kiln for firing refractories where kiln cars replace the kiln bottom. The ware to be fired is stacked on kiln cars, which are pushed into the kiln, the door is closed, and after firing and cooling to a certain temperature, the door is opened and the kiln cars are pulled out for loading and unloading.

3.6 shaft kiln

A vertical kiln for calcining refractories where raw material is fed from the top, air is blown in from the bottom by a high-temperature fan, the material moves downward by gravity, and the calcined material (clinker) is discharged from the bottom.

3.7 rotary kiln

A kiln for calcining refractories consisting of a steel cylindrical shell lined with refractory material, rotating slowly.

3.8 electric arc furnace

An electric furnace for producing refractory materials by melting ores or materials using the high temperatures generated by electric arcs between electrodes.

3.9 volatile organic compounds (VOCs)

Organic compounds that participate in atmospheric photochemical reactions, or organic compounds determined according to relevant regulations.

When characterizing the overall emissions of VOCs, non-methane total hydrocarbons (expressed as NMHC) are used as the pollutant control item based on industry characteristics and environmental management requirements.

3.10 non-methane total hydrocarbons (NMHC)

The sum of all gaseous organic compounds other than methane that produce a response on a hydrogen flame ionization detector when measured by the specified monitoring method. Results are expressed in terms of carbon.

7 Implementation and Supervision1 Scope

This standard specifies the control requirements, monitoring, and supervision and management requirements for air pollutant emissions from the refractory industry.

This standard applies to the management of air pollutant emissions from existing refractory industrial enterprises or production facilities, as well as to the environmental impact assessment of construction projects in the refractory industry, the design of environmental protection facilities, the acceptance of completed environmental protection facilities, the issuance of pollutant discharge permits, and the management of air pollutant emissions after these projects are put into operation.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

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