Cement enterprises should pay attention! The Ministry of Emergency Management issued the Criteria for Determining Major Accident Hidden Dangers of Industrial and Trade Enterprises.

Recently, Decree No.10 of the Ministry of Emergency Management of the People's Republic of China was issued. Among them, the Criteria for Determining the Hidden Dangers of Major Accidents in Industrial and Trade Enterprises have been deliberated and adopted by the 7th Ministerial Meeting of the Ministry of Emergency Management on March 20, 2023, and are hereby promulgated for implementation as of May 15, 2023.

According to the judgment criteria, if a cement enterprise has one of the following circumstances, it shall be judged as a major accident hidden danger:

(1) The coal mill bag dust collector and the pulverized coal bunker are not equipped with temperature and fixed carbon monoxide concentration monitoring and alarm devices, or are not equipped with gas fire extinguishing devices;

(2) The manual cleaning operation of the cylindrical storage fails to implement the safety measures to prevent falling from high places and collapse in the cleaning plan;

(3) The cylindrical storage of carbide slag raw materials in cement enterprises is not equipped with a fixed combustible gas concentration monitoring and alarm device, or the monitoring and alarm device is not interlocked with the accident ventilation device;

(4) Before entering cylindrical storage, roasting kiln, preheater cyclone, decomposition furnace, shaft furnace, grate cooler, mill and crusher, no quarantine measures have been taken for equipment that may be accidentally started and materials, high-temperature gases, toxic and harmful gases that may be poured in, or no safety measures have been taken to prevent falling and collapse from high places;

And (1) failing to uniformly coordinate and manage the work of production safety of the contracting unit and the leasing unit, or failing to conduct regular safety inspections;

(2) special operation personnel failing to receive special safety operation training and obtain corresponding qualifications in accordance with regulations; Etc.

Article 2 This standard is applicable to the determination of metallurgy, nonferrous metals, building materials, machinery, Hidden dangers of major accidents in light industry, textile, tobacco, trade and other industrial and trade enterprises. Where there are other provisions on the determination of major accident hidden dangers involving dangerous chemicals, fire control (fire), gas and special equipment in industrial and trade enterprises, such provisions shall apply. If an

industrial and trade enterprise has any of the following circumstances, it shall be judged as a hidden danger of a major accident:

(1) failing to uniformly coordinate and manage the work safety of the contracting unit or the leasing unit, or failing to conduct regular safety inspections;

(2) Special operation personnel fail to receive special safety operation training and obtain corresponding qualifications to work in accordance with the provisions;

(3) The main person in charge of the metal smelting enterprise and the safety production management personnel fail to pass the examination in accordance with the provisions. Article

4 If a metallurgical enterprise is under any of the following circumstances, It shall be determined as a major accident hidden danger:

(1) The meeting room, activity room, rest room, operation room, shift room, dressing room (including bathhouse) and other six types of places where people gather, as well as the cold (hot) repair station of the molten iron tank is set in the floor area of the molten iron, molten steel and liquid slag lifting span;

(2) During the production period, there are six types of water accumulation in the accident pits, slag pits under the furnace in the smelting, refining and casting production areas, as well as in the front platform of the furnace, the furnace base area, the lifting and ground transportation channels in the workshop within the scope of the leakage and splashing of molten metal;

(3) The steelmaking and continuous casting process is not provided with an accident ladle, a tundish breakout pit (trough), a tundish overflow pit (trough), or a breakout rotary chute, or the die casting process is not provided with an accident ladle (pit, trough);

(4) The water-cooled elements of steelmaking furnaces such as converter, electric arc furnace, AOD furnace, LF furnace, RH furnace and VOD furnace are not equipped with monitoring and alarm devices for outlet water temperature and flow difference between inlet and outlet water, or the monitoring and alarm devices are not interlocked with the tilting of the furnace body, the automatic lifting of the oxygen (auxiliary) gun, the automatic power-off of the electrode and the lifting device;

(5) During the production of the blast furnace, the set value of the working pressure at the top of the furnace exceeds the maximum working pressure specified in the design documents, or the monitoring device for the working pressure at the top of the furnace is not interlocked with the relief valve at the top of the furnace, or the set value of the interlocked relief pressure at the relief valve at the top of the furnace exceeds the design pressure value of the equipment;

(6) Six types of personnel gathering places, such as conference rooms, activity rooms, rest rooms, operation rooms, handover rooms and dressing rooms near gas production, recovery and purification, pressurized mixing, storage and use facilities, as well as places and locations where gas leakage and accumulation may occur, are not equipped with fixed carbon monoxide concentration monitoring and alarm devices. Or the monitoring data are not connected to the places where people are on duty for 24 hours;

(7) Heating furnaces, gas cabinets, dust collectors, pressure machines, roasters and other facilities, as well as gas pipelines before entering the workshop are not equipped with partition devices;

(8) The maximum sealing gas pressure of the water-sealed drainer of the positive pressure gas transmission and distribution pipeline is less than 30 kPa, or the two sides of the partition device of the same gas pipeline share a drainer, or the drainage pipes above the drainers of different gas pipelines are connected, or the gas pipelines of different media share a drainer.Article

5 If a nonferrous enterprise has one of the following circumstances, it shall be judged as a major accident hidden danger:

(1) The meeting room, activity room, rest room, operation room, shift room, dressing room (including bathhouse) and other six types of personnel gathering places are set up in the floor area of the molten metal lifting span;

(2) During the production period, there are six types of non-productive water accumulation in the accident pits and slag pits under the furnace in the smelting, refining and casting production areas, as well as in the front platform of the furnace, the foundation area of the furnace, the lifting in the workshop and the ground transportation passage within the scope of the leakage and splashing of molten metal;

(3) There are no emergency discharge and emergency storage facilities in the molten metal casting process (except for tilting melting furnace, tilting holding furnace, tilting melting and holding integrated furnace and fixed melting furnace with holding furnace);

(4) Smelting furnaces, casting machines (except crystallizers for deep well casting process of aluminium processing) and heating furnaces cooled by water cooling are not equipped with emergency water sources;

(5) The closed-circuit circulating water-cooled element of the molten metal smelting furnace is not equipped with a monitoring and alarm device for the outlet water temperature and the difference between the inlet and outlet water flow, or the open-circuit water-cooled element is not equipped with a monitoring and alarm device for the inlet water flow and pressure, or the outlet water temperature of the open-circuit water-cooled element is not monitored;

(6) The cooling water system of the crystallizer in the deep well casting process of aluminum processing is not equipped with monitoring and alarm devices for water inlet pressure and flow, or the monitoring and alarm devices are not interlocked with the quick cut-off valve, emergency discharge valve and launder disconnecting device, or the monitoring and alarm devices are not interlocked with the control system of the tilting casting furnace;

(7) There is no liquid level monitoring and alarm device at the entrance of the molten aluminium outlet launder, launder and die plate (distribution launder) of the casting furnace for deep well casting process of aluminium processing, or there is no mechanical locking device at the molten aluminium outlet of the fixed casting furnace;

(8) There is no emergency discharge valve in the aluminum liquid launder of the fixed casting furnace of the deep well casting process for aluminum processing, or there is no quick cut-off valve (disconnection device) at the connection between the launder and the inlet of the die plate (distribution launder). Or the liquid level monitoring and alarm device at the connection between the launder and the inlet of the die plate (distribution launder) is not interlocked with the quick cut-off valve (disconnection device) and the emergency discharge valve;

(9) There is no quick cut-off valve (disconnecting device) at the connection between the launder of the tilting casting furnace and the inlet of the mould tray (distribution launder) in the deep well casting process of aluminium processing, or the liquid level monitoring and alarm device at the connection between the launder and the inlet of the mould tray (distribution launder) is not interlocked with the tilting control system of the casting furnace and the quick cut-off valve (disconnecting device);

(10) Selecting non-steel-cored wire ropes for the steel wire winch system of the aluminum processing deep well casting machine, or failing to implement the system of regular inspection and replacement of wire ropes;

(11) Fixed gas concentration monitoring and alarm devices are not installed in places and locations where four toxic gases, such as carbon monoxide, hydrogen arsenide, chlorine and hydrogen sulfide, may leak or accumulate, or monitoring data are not connected to 24-hour manned sites. Or failing to take detection measures with the same effect in places and locations where arsine gas may be found;

(12) failing to install pressure monitoring and alarm devices on the main fuel gas pipes of combustion devices using coal gas (natural gas) and forced air supply, or failing to interlock the monitoring and alarm devices with the automatic emergency cut-off devices;

(13) The maximum sealing gas pressure of the water-sealed drainer of the positive pressure gas transmission and distribution pipeline is less than 30 kPa, or the two sides of the partition device of the same gas pipeline share a drainer, or the drainage pipes above the drainers of different gas pipelines are connected, or the gas pipelines of different media share a drainer. Article

6 If a building materials enterprise has one of the following circumstances, it shall be judged as a hidden danger of a major accident:

(1) The coal mill bag dust collector and the pulverized coal bunker are not equipped with temperature and fixed carbon monoxide concentration monitoring and alarm devices, or are not equipped with gas fire extinguishing devices;

(2) The manual cleaning operation of the cylindrical storage fails to implement the safety measures to prevent falling from high places and collapse in the cleaning plan;

(3) The cylindrical storage of carbide slag raw materials in cement enterprises is not equipped with a fixed combustible gas concentration monitoring and alarm device, or the monitoring and alarm device is not interlocked with the accident ventilation device;

(4) Before entering cylindrical storage, roasting kiln, preheater cyclone, decomposition furnace, shaft furnace, grate cooler, mill and crusher, no quarantine measures have been taken for equipment that may be accidentally started and materials, high-temperature gases, toxic and harmful gases that may be poured in, or no safety measures have been taken to prevent falling and collapse from high places;

(5) The gas mains of gas kilns using premixed combustion (except thermal generators and gas kilns) are not equipped with pipeline pressure monitoring and alarm devices, or the monitoring and alarm devices are not interlocked with emergency automatic cut-off devices;

(6) Hydrogen generation stations, nitrogen-hydrogen protective gas distribution rooms, fuel gas distribution rooms and other three types of places are not equipped with fixed combustible gas concentration monitoring and alarm devices;

(7) The water cooling equipment of the electric furnace for electric melting products fails;

(8) Glass kilns, glass tin baths and other equipment are not equipped with monitoring and alarm devices for water-cooled and air-cooled protection systems. Article

7 If a machinery enterprise has one of the following circumstances, it shall be judged as a major accident hidden danger:

(1) The meeting room, activity room, rest room, dressing room, shift room and other five types of personnel gathering places are set up in the floor area of the molten metal lifting span or pouring span;

(Two) casting smelting furnace, refining furnace and holding furnace are not equipped with emergency discharge and emergency storage facilities;

(3) During the production period, there is water in the bottom, pit and accident pit of the smelting furnace, refining furnace and holding furnace for casting, as well as in the front platform of the furnace, the base area of the furnace, the molding pit, the pouring pit and the transfer channel of the molten metal within the scope of the leakage and splashing of the molten metal;

(4) The cooling water system of smelting furnace, refining furnace, die-casting machine and oxygen lance for casting is not equipped with monitoring and alarm devices for outlet water temperature and flow difference between inlet and outlet water, or the monitoring and alarm devices are not interlocked with the control system for heating and conveying molten metal;

(5) The gas main pipe of the combustion device using gas (natural gas) is not equipped with a pipeline pressure monitoring and alarm device, or the monitoring and alarm device is not interlocked with the emergency automatic cut-off device, or the combustion device is not equipped with a flame monitoring and flameout protection system;

(6) When using flammable organic solvents to clean equipment, facilities, tooling and the ground, no measures have been taken to prevent the accumulation of flammable gases in the surrounding closed or semi-closed spaces;

(7) Paint mixing rooms and spray rooms using non-water-based paint are not equipped with fixed combustible gas concentration monitoring and alarm devices or ventilation facilities. Article

8 If a light industrial enterprise has any of the following circumstances, it shall be judged as a hidden danger of a major accident:

(1) The baking and frying equipment of a food manufacturing enterprise is not equipped with an automatic cut-off device to prevent overheating;

(2) The liquor blending and filling places and liquor storehouses are not equipped with fixed alcohol vapor concentration monitoring and alarm devices, or the monitoring and alarm devices are not interlocked with ventilation facilities;

(3) Pulp manufacturing and papermaking enterprises use steam or open fire to directly heat liquid chlorine vaporized from steel cylinders;

(4) The gas mains of gas kilns (except gas kilns for thermal generators) in which the daily glass and ceramics manufacturing enterprises adopt the premixed combustion mode are not equipped with pipeline pressure monitoring and alarm devices, or the monitoring and alarm devices are not interlocked with the emergency automatic cut-off devices;

(5) The cooling protection system of the glass furnace of a daily-use glass manufacturing enterprise is not equipped with a monitoring and alarm device;

(6) The paint mixing room or paint spraying room where non-water-based paint is used is not equipped with a fixed combustible gas concentration monitoring and alarm device or ventilation facility;

(seven) lithium ion battery storage warehouse has not taken effective physical quarantine measures for faulty batteries. Article

9 If a textile enterprise has any of the following circumstances, it shall be judged as a hidden danger of a major accident:

(1) The vaporization chamber, gas storage tank, oil storage tank, and heat medium furnace for the heat setting process such as singeing, opening, and drying of yarn, thread, and fabric processing are not separated from or set up separately from the places where production and processing personnel gather;

(2) Sodium hydrosulfite, hydrogen peroxide, sodium hypochlorite, sodium chlorite, carved white powder (suspended white block) are mixed with taboo materials for storage, or no waterproof and moisture-proof measures are taken in the place where sodium hydrosulfite is stored.Article

10 If a tobacco enterprise has any of the following circumstances, it shall be judged as a hidden danger of a major accident:

(1) The fumigation workplace is not equipped with a phosphine gas concentration monitoring and alarm instrument, or is not equipped with a gas mask, or has not confirmed that all unrelated personnel have been evacuated from the fumigation workplace before the fumigation and insecticidal operation;

(2) The production lines and places where liquid carbon dioxide is used to produce expanded cut tobacco are not equipped with fixed carbon dioxide concentration monitoring and alarm devices, or the monitoring and alarm devices are not interlocked with emergency ventilation facilities. Article

11 If an industrial and trade enterprise with dust explosion hazard has one of the following circumstances, it shall be judged as a major accident hidden danger:

(1) The dust explosion hazard site is located in a multi-storey building (structure) with non-frame structure. Or there are staff dormitories, conference rooms, offices, lounges and other places where people gather in dangerous places of dust explosion;

(2) Different types of combustible dust, combustible dust and combustible gas and other media that are liable to aggravate the risk of explosion share a set of dust removal systems, or different buildings (structures) and different fire compartments share a set of dust removal systems and dust removal systems are interconnected;

(3) The dry-type dedusting system fails to take any explosion provention and control measures such as explosion venting, inerting, and explosion suppression;

(4) When the dedusting system for aluminum, magnesium, and other metal dusts adopts the positive pressure dedusting method, or when the dedusting system for other combustible dusts adopts the positive pressure dust blowing method, it fails to take measures to prevent ignition sources such as spark detection and elimination;

(5) The dust removal system uses a gravity settling chamber for dust removal, or uses a dry laneway structure as a dust removal duct;

(6) The dry dust removal system for aluminum, magnesium and other metal dust and wood dust is not equipped with an air lock and ash unloading device;

(7) Electrical equipment in dust explosion hazardous areas divided into 20 zones, such as dust collectors and dust collection bins, does not meet the explosion-proof requirements;

(8) Before crushing, grinding, granulation and other process equipment that are prone to mechanical ignition sources, there is no device for removing debris such as iron and stone, or there is no device for detecting and eliminating sparks in the air duct connected between the wood product processing enterprise and the sander;

(9) The collection, stacking and storage sites of metal dust that spontaneously combusts when wet fail to take measures such as ventilation to prevent hydrogen accumulation, or the dry collection, stacking and storage sites fail to take waterproof and moisture-proof measures;

(10) The dust cleaning system is not implemented, resulting in serious dust accumulation at the operation site. Article

12 An industrial and trade enterprise that uses liquid ammonia for refrigeration shall be judged as a hidden danger of a major accident under any of the following circumstances:

(1) The air-conditioning system of a packaging, segmentation, or product finishing place uses ammonia for direct evaporative refrigeration;

(2) The rapid freezing device is not set up in a separate working room, or the number of workers in the working room of the rapid freezing device exceeds 9. Article

13 An industrial and trade enterprise operating in a confined space with the risk of hydrogen sulfide and carbon monoxide poisoning shall be judged as a major accident hazard under any of the following circumstances:

(1) Failing to identify the confined space, establish a safety management account, and set up obvious safety warning signs;

(2) Failure to implement the examination and approval of limited space operations, or failure to implement the requirements of "ventilation first, then testing, and then operation", or failure to set up guardians at the operation site. Article

14 The monitoring, alarm, protection and other facilities, equipment and devices directly related to production safety under the circumstances listed in this Standard shall ensure their normal operation and use, and their failure or invalidity shall be judged as hidden dangers of major accidents. Article

15 This Standard shall come into force as of May 15, 2023. The Standards for Determining Hidden Dangers of Major Production Safety Accidents in Industry and Trade (2017 Edition) (No.129 of General Administration of Safety Supervision) shall be abolished at the same time.

In order to further promote the green, digital and intelligent development of the cement industry, China Cement Network will be launched on April 24-25, 2023. The "China Cement Industry Green Development Summit Forum and Ultra-clean Emission Technology Exchange Conference" and the "Fourth China Cement Intelligent Summit Forum" were held in Changsha, Hunan Province, inviting industry experts, cement and related enterprises. Jointly promote the high-quality development of the cement industry! ccement.com/pricenewslist-1-430000-430200.