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OCCUPATIONAL SAFETY AND HEALTH
Instructions for labor protection when working with cyanide salts
Occupational Safety and Health / Standard instructions for labor protection Safe Operation 1. General safety requirements 1.1. Based on this instruction, labor protection instructions are being developed for workers involved in metal coating processes when working with cyanide salts (hereinafter referred to as workers working with cyanide salts). 1.2. Workers who are at least 18 years old and have mastered safe methods and techniques for performing work, methods and techniques for proper handling of mechanisms, devices, tools, as well as loads are allowed to perform work with cyanide salts. 1.3. To work on hoisting machines controlled from the floor, to hang the load on the hook of such machines, workers are allowed at least 18 years old, trained in a special program, certified by the examination committee of the organization and having a certificate for the right to use hoisting machines and hooking loads. 1.4. Repeated training on labor protection in the workplace is carried out at least once every three months. 1.5. Periodic medical examination is carried out at least once every 12 months. 1.7. Repeated testing of knowledge of the rules of safe work performance is carried out by the organization’s examination committee at least once every 12 months. 1.8. When performing work, it is necessary to comply with the accepted technology. It is not allowed to use methods leading to violation of labor safety requirements. 1.9. In case of any questions related to its safe performance in the process of work, you must contact your immediate or higher manager. 1.10. Workers working with cyanide salts are required to comply with the internal labor regulations of the organization. 1.11. When working with cyanide salts, an employee may be exposed to hazardous and harmful production factors:
Therefore, failure to follow these instructions may result in poisoning and chemical burns. 1.12. Workers working with cyanide salts must be provided with personal protective equipment. 1.13. The room in which work with cyanide salts is carried out must be isolated from other production areas and equipped with a supply and exhaust ventilation system with air purification. Switchboards for switching off and on ventilation devices must be located outside the room. 1.14. The room for working with cyanide salts must be equipped with an automatic device that signals the presence of harmful substances in the air. 1.15. In rooms for storing and packaging cyanide salts, connections between walls and floors must be rounded and free from potholes, cracks, and crevices in which salt residues may accumulate. 1.16. The floor must be wiped daily with a five percent solution of iron sulfate and washed at least twice a day with hot alkaline water. 1.17. Ventilation from baths with cyanide electrolytes must be self-sufficient. It is not allowed to connect other ventilation systems to it. 1.18. To clean the contaminated air emitted by the fan, a filter, an absorber must be installed, or a water curtain must be constructed. 1.19. The warehouse for storing cyanide salts should be located in a separate, fireproof, heated and permanently closed room, access to which is allowed only to special maintenance personnel. In a separate (adjacent) room, a sanitary room should be equipped, which should contain a washbasin with hot and cold water, soap, a disinfectant composition, pastes and ointments, a first aid kit with a set of medicines for first aid, cabinets for storing work clothes, safety shoes and other equipment personal protection. 1.20. The warehouse for storing cyanide salts must be dry, isolated from the general warehouse and equipped with emergency exhaust ventilation with a starting device located outside the room. Before entering this room, you must turn on the ventilation for 5 to 10 minutes. 1.21. Warehouses for storing cyanide salts must be equipped with an automatic indicator device. If hydrogen cyanide is present in the air, the room should be ventilated until repeated tests show its absence. In emergency cases, entry into the warehouse is permitted in gas masks of the "BKF" or "B" brand with an aerosol filter. 1.22. Containers for storing cyanide salts (metal cans or drums marked “Poison”) must be hermetically sealed. The capacity of the jar should correspond to the amount of salt needed to make the bath. Each can of cyanide salts must have a label indicating the weight and time of packaging. Cans must be sealed and stored under lock and key in a special iron cabinet equipped with exhaust ventilation. 1.23. The release of cyanide salts from the warehouse is carried out only upon a written request signed by the employee, to whom this right is granted by the employer. 1.24. Receipt of cyanide salts into the warehouse and issue of cyanide salts must be recorded in a linked ledger for accounting and consumption of cyanide salts. 1.25. Opening containers with cyanide salt should only be done in the room for packaging and dissolving cyanide salts. 1.26. The room for packaging and dissolving cyanide salts must contain baths with side suction, a fume hood, tools and devices for packaging and dissolving, as well as sealable containers for delivering solutions of cyanide salts to the workshops. 1.27. In the warehouse or workshop storeroom for storing cyanide salts there should be a glass or ceramic vessel with a five percent solution of iron sulfate and a water tap to neutralize cyanide salts that fall on the floor. 1.28. Storage of other chemical materials is not permitted in the cyanide salt storage warehouse. It is allowed to store substances of only one hazard class. 1.29. The warehouse for storing cyanide salts must have a special cabinet for storing scales, tools, containers and devices designed for handling cyanide salts. 1.30. Storage of cyanide salts in the workshop is permitted in cases where multiple adjustments of cyanide baths are necessary during the work process. Cyanide salts may be stored in the workshop only in a specially equipped room in fume hoods in quantities not exceeding the needs of one shift. Cabinet doors should be locked and sealed. 1.31. It is prohibited to store acids in a closet or near a place where cyanide salts are hung, since when an acid combines with cyanide salts, poisonous hydrogen cyanide (hydrocyanic acid) is released. 1.32. Dry cyanide salts in a fume hood. In this case, the crucible should be covered with filter paper. 1.33. Cyanide salts from the warehouse to the workshop must be transported in unopened drums or in sealed cans by specially designated vehicles, accompanied by the recipient. 1.34. Drums filled with solids must be opened mechanically. In case of opening manually, it is necessary to use a special knife. Percussion instruments are not allowed. 1.35. Carrying cyanide salts and solutions to the cyanide bath is allowed only in closed containers marked with the warning sign “POISON”. 1.36. The solution for cyanide baths must be dispensed in the quantity required for the work shift. 1.37. Loading the composition into a cyanide bath must be done carefully, directly from the vessel, taking the necessary precautions against spraying and splashing. 1.38. If the solution is spilled on the floor, it must be washed with a five percent solution of ferrous sulfate. 1.39. Vessels emptied of cyanide salts and solutions should be put away in a cabinet. 1.40. All spent solutions of cyanide salts, if they are not used for regeneration purposes, must be neutralized by filling with a five percent solution of ferrous sulfate before being discharged into the sewer. 1.41. The analysis of the state of the air environment in the production room must be carried out in accordance with the schedule approved by the employer. 1.42. Hanging devices (traverses, baskets and others) must be durable and comfortable, made of a material resistant to acids and alkalis. 1.43. Baths containing cyanide electrolytes must be equipped with lids with locks. Covers on baths with cyanide electrolytes installed on automatic or semi-automatic lines may not be provided if there are fencing devices that prevent access to the baths outside of working hours. 1.44. Baths with solutions heated to high temperatures, with harmful emissions, as well as with long-term operations of the technological process, in addition to side suctions, must have lids that are closed during operation. 1.45. Baths intended for washing parts after processing them in cyanide electrolytes should not be used for other purposes. Cyanide rinse waters should not be allowed to mix with acidic rinse waters without prior neutralization. 1.46. The internal surfaces of baths for aggressive substances, as well as pipelines to them, should be made or coated with corrosion-resistant materials. 1.47. Devices installed near cyanide baths must be protected from the ingress of electrolyte, the influence of magnetic fields, temperature, chemical influences of the environment and mechanical damage. 1.48. In the event of an accident, an employee working with cyanide salts must stop work, notify his immediate or superior manager and seek medical help. 1.49. An employee working with cyanide salts is obliged to observe the rules of personal hygiene; Before eating and after finishing work, wash your hands with warm water and soap. Food must be taken in rooms specially equipped for this purpose. 1.50. Areas where cyanide compounds are used must have a first aid kit with medications and equipment to provide first aid in case of cyanide poisoning. 1.51. Workers working with cyanide salts must be able to provide first aid to the victim. 1.52. An employee working with cyanide salts who does not comply with the requirements of these instructions will be held accountable in accordance with current legislation. 2. Safety requirements before starting work 2.1. Inspect the workplace, put it in order, clear the aisles and do not clutter them up. 2.2. Inspect, tidy up and put on personal protective equipment. 2.3. Turn on the exhaust ventilation when working with cyanide salts 30 minutes before starting work. 2.4. When working in cyanide baths, lubricate the mucous membrane of the nose, hands, and face with Vaseline or lanolin. 2.5. Do not start working with cyanide electrolytes if the skin on your hands and face is damaged. 2.6. Make sure that the floor is dry and that the foot grate located near the cyanide bath is stable and in good condition. 2.7. Prepare the necessary tools and fixtures for work in accordance with the requirements of the technological documentation. Tools used to work in cyanide baths must have a distinctive color. 2.8. Check availability and serviceability:
2.9. Place parts in accordance with the requirements of technological documentation. 2.10. Check the illumination of the workplace. The voltage of local lighting should not exceed 50 V. 2.11. When working with lifting mechanisms, check their serviceability and comply with the requirements of the relevant labor protection instructions. 3. Safety requirements during work 3.1. Keep the work area clean and free from clutter. 3.2. It is not allowed to check the fastening of parts on the rods by shaking them over the bathtub. 3.3. When packaging cyanide salts, use a gas mask. 3.4. Loading cyanide salts, adjusting cyanide baths, cleaning and filtering solutions, neutralizing containers and waste should be carried out under the guidance of administrative personnel with exhaust ventilation turned on. 3.5. It is not allowed to store acids and cyanide salts together in work areas. 3.6. Work on dissolving cyanide salts should be carried out in the presence of your immediate supervisor. 3.7. Drums with cyanide salts received at the warehouse are delivered to the room for dissolution on a special cart. The use of this cart for transporting other goods is permitted after it is washed with a five percent solution of ferrous sulfate. 3.8. When placing a drum with cyanide salts in the bath of the dissolution installation, use an electric hoist and a special grip; however, lifting the drum with an oblique tension of the cargo rope is not allowed. 3.9. Release the grip from the drum with cyanide salts, close and lock the lid of the dissolution unit. 3.10. Fill the dissolution unit bath with warm water at a temperature of 40°C. 3.11. Turn on the pneumatic punch to open the drum with cyanide salts by pressing the "Working cylinder down" button, open the recirculation valve, and close the solution filling valve. 3.12. During recirculation, monitor the water temperature until the cyanide salts are completely dissolved, then turn off the pump. 3.13. Pump the finished solution from the dissolution unit into the cyanide solution storage tank. 3.14. When pumping cyanide solution into a special bath, follow the following procedure:
3.15. After the cyanide solution has completely drained from the dissolution unit into the storage bath, lift the cylinder rod up by pressing the "Working cylinder up" button, release the stopper by pressing the "Opening the lid" button. 3.16. Install the grip on the drum with cyanide salts and remove the drum from the installation using a hoist, neutralize the drum in a bath with a solution of five percent iron sulfate without removing the grip, rinse the drum in two baths of water. 3.17. Working near cyanide baths is only allowed with properly functioning ventilation. 3.18. When working, protect your face from accidental splashes on it. 3.19. Wear protective goggles to protect your eyes from possible splashes. 3.20. Before immersing in cyanide baths, wash products from acid residues. 3.21. When loading parts into a cyanide bath and when adjusting it, do not touch the electrolyte with bare hands. Work only with good rubber gloves. 3.22. Remove fallen parts from the cyanide bath using special tongs specified in the technological documentation. 3.23. Clean electrical wires, hoses and anodes in a cyanide bath after disconnecting them from the power supply using rubber gloves. 3.24. Used anodes that are unsuitable for further use should be removed from the cyanide bath with tongs and washed in a special container, first with a solution of five percent iron sulfate, and then with water. 3.25. Cover baths with cyanide electrolytes with lids during operation. During lunch breaks, bathtubs must be covered and locked. 3.26. During operation, keep an eye on the indicator light indicating the operation of the exhaust ventilation. 3.27. Check the serviceability of the interlock system, alarms, limit switches, chains, cargo hooks and other devices for hanging parts and the reliability of their fastening. 3.28. It is prohibited to eat, drink and smoke in the work area, as well as to visit eating places in overalls. 4. Safety requirements in emergency situations 4.1. When ventilation is turned off, work must be stopped. Employees must immediately leave the premises and tightly close doors leading to other premises and report this to their immediate or superior manager. 4.2. If the smell of almonds (smell of hydrocyanic acid) appears, inform your immediate or superior manager, stop work and leave the premises. 4.3. In case of injury, poisoning and sudden illness, the victim should be provided with first (pre-medical) aid and, if necessary, his delivery to a healthcare facility should be organized. 4.4. In case of electric shock, take measures to release the victim from the action of the current as soon as possible. 4.5. When rotating parts of machines, slings, cargo hooks and other equipment capture parts of the body or clothing, give a signal to stop work and, if possible, take measures to stop the machine (equipment). You should not try to free yourself from the grip if it is possible to attract others. 4.6. In the event of a fire:
5. Safety requirements at the end of work 5.1. At the end of work, close the baths with cyanide electrolytes with lids and lock them. Hand over the keys to the immediate supervisor of the work. 5.2. Before leaving the workshop, neutralize all containers with a solution of five percent iron sulfate. 5.3. Before starting a shift, check in a cyanide bath the presence and serviceability of: fences, safety interlocks, alarms, grounding, ventilation systems. Record the inspection results in the shift log and report any malfunctions to the work manager. 5.4. Tidy up the workplace, put the tools and fixtures in the tool box. 5.5. Take off overalls and other personal protective equipment and hang them in a specially designed place. 5.6. Wash hands and face with warm soapy water, rinse mouth and shower.
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