What are the dangers of calcium carbide plant to people? What is calcium carbide? What are the hazar

Calcium carbideIt can damage **, cause **itching, inflammation, "bird's eye" sores, and meliga. **Burns are characterized by long-term wound failure and chronic ulceration. Workers who come into contact with it have little sweating and tooth enamel damageTooth decayIncreased incidence.

World Health Organization.

The list of carcinogens published by the International Agency for Research on Cancer (IARC) is preliminarily sorted out for reference, calcium carbide.

Produced in the list of Group 3 carcinogens.

First aid measures. 1. **Contact.

Immediately remove contaminated clothing and rinse with plenty of running water for at least 15 minutes. Medical treatment.

2. Eye contact.

Lift the eyelids immediately and rinse thoroughly with plenty of running water or saline for at least 15 minutes. Medical treatment.

3. Inhalation. Get out of the scene and get to the fresh air. Keep your airways open. If you have difficulty breathing, give oxygen. If breathing stops, artificial respiration is performed immediately. Medical treatment.

Calcium carbide in the production of storage precautions:

Calcium carbide powder is easy to absorb moisture to form acetylene.

Acetylene is a flammable gas and is prone to occur**, calcium carbide powder needs to be used as an inert gas.

Sealed storage and transportation. The calcium carbide warehouse shall not be located in a place where water may accumulate, and the floor of the warehouse shall be higher than the outdoor ground m. Calcium carbide should avoid moisture, the warehouse must be strictly protected from rain leakage, the container should be well sealed, and the calcium carbide barrel should have fire and moisture safety signs.

The calcium carbide warehouse should be a fire-resistant building, the roof should be equipped with a hood of natural ventilation, there should be no open flame within 10m around the warehouse, and the facilities in the warehouse should meet the explosion-proof requirements.

Beryllium-copper alloy tools that do not spark should be used to open the calcium carbide barrel; When using copper tools, their copper content should be less than 70%. The calcium carbide warehouse should be equipped with yellow sand, dry powder, and carbon dioxide.

and other fire extinguishers that do not contain water.

Fire extinguishing method: It is forbidden to extinguish the fire with water or foam. Carbon dioxide is also ineffective. Dry graphite powder or other dry powders (such as dry sand) should be used to extinguish the fire.

The above content refers to Encyclopedia - Calcium Carbide.

The pollution of calcium carbide plant is more serious, dust is an important part, calcium carbide production, calcium carbide furnace flue gas is the largest source of pollution. Causes itching, inflammation, "bird's eye" sores, and meladerma. Burns caused by hot calcium carbide are the most common accidents in industrial production.

Crystal structure: But due to [:c c:

The 2-ions are elliptical in shape, directionally arranged, and the crystals belong to the tetragonal system. In the [:c c:

In 2-ions, the C-C distance is 120 pm, which is equivalent to the bond length of the carbon-carbon triple bond, and the distance between Ca and C is 259 and 282 pm.

Emergency Treatment:

Isolate leakage contaminated areas and restrict access. Cut off the source of fire. Emergency responders are advised to wear self-contained positive pressure respirators and chemical protective clothing.

Do not come into direct contact with spills. Small leaks: Mix with sand, dry lime or soda ash.

Use a non-sparking tool to collect in a dry, clean, covered container and transfer to a safe place.

Massive leakage: cover with plastic sheeting, canvas. Liaise with the relevant technical department to determine the method of removal. Fire extinguishing method: It is forbidden to extinguish the fire with water or foam. Carbon dioxide is also ineffective. Dry graphite powder or other dry powders (such as dry sand) should be used to extinguish the fire.

The above content reference: Encyclopedia - calcium carbide.

The chemical name of calcium carbide is calcium carbide, and the molecular formula is CAC2 Hazards of calcium carbide: (1) Calcium carbide can cause **damage, causing **itching, inflammation, "bird's eye" like ulcers, and melanoderma. Burns caused by hot calcium carbide are the most common accidents in industrial production.

**Burns are long-term wound and chronic ulcer type. Workers exposed to it have a high incidence of sweating, tooth enamel damage, and dental caries. (2) The carbon monoxide, sulfur dioxide and dust discharged in the calcium carbide furnace are harmful to human respiratory organs, eyes and dust.

3) Calcium carbide may contain impurities calcium phosphate or calcium arsenate, which release phosphorus or arsenic when wet, both of which are highly toxic, and acetylene released by calcium carbide when wet is also harmful to people. Measures for the safe use of calcium carbide: (1) Calcium carbide transportation, storage, crushing, calcium carbide room (library) and slag pit, etc., should be implemented in accordance with the provisions of TJ31.

2) Barreled calcium carbide should be stored in a room with dry ground, air circulation and no rainwater leakage, and the ground should be higher than the road surface to avoid water ingress. (3) It is forbidden to load, unload and carry calcium carbide barrels in a rolling and sliding manner, so as to avoid sparks caused by the impact of calcium carbide and the barrel wall. (4) After each time the calcium carbide is taken, the barrel lid should be covered (5) It is forbidden to beat the calcium carbide with a hammer in the acetylene generator room and calcium carbide room.

6) Powdery and small calcium carbide should be put into the slag pit in batches and thoroughly decomposed with water for proper treatment. (7) The upper mouth of the calcium carbide slag pit should be open, and the mortar and gray water in the slag pit shall not be discharged into the culvert. When slag is discharged, it is necessary to prevent local sparks caused by the collision of iron tools and devices.

When the calcium carbide and acetylene mixed gas ignites the fire, dry sand, carbon dioxide or dry powder fire extinguishers should be used to extinguish the fire, and it is forbidden to use water or foam fire extinguishers and carbon tetrachloride fire extinguishers to extinguish the fire. Wish.

It will get pneumoconiosis, calcium carbide will automatically dissolve into powder when it encounters air oxidation, and it is very corrosive and can be burned.

Calcium carbide is an inorganic compound, white crystal, industrial products are gray-black blocks, and the cross-section is purple or gray. Calcium carbide is its main component. An important basic chemical raw material, mainly used to produce acetylene gas. It is also used in organic synthesis, oxyyne welding, etc.

The calcium carbide reacts violently when it encounters water, generates acetylene, and releases heat from the mind. Because calcium carbide often contains impurities such as calcium arsenide (Ca3 As2) and calcium phosphide (Ca3 P2), hydrogen arsenide (ash3), phosphine (ph3) and other toxic gases are released at the same time when it reacts with water, so the acetylene produced by calcium carbide is toxic.

The calcium carbide factory is the production of calcium carbide, the chemical name of calcium carbide is calcium carbide, and the appearance is gray, brownish-yellow, black or brown lumpy solid.

The main component of industrial calcium carbide is calcium carbide, the rest is free calcium oxide, carbon and silicon, magnesium, iron, aluminum compounds and a small amount of phosphide and sulfide. The purity of industrial calcium carbide is about 70%-80%, impurities CAO accounts for about 24, and alarms such as carbon, silicon liquid Chixin, iron, calcium phosphide and calcium sulfide account for about 6. The appearance varies depending on the amount of calcium carbide in a solid substance that is gray, brown, purple, or black.

Due to its physical and chemical properties, calcium carbide is classified as a category of hazardous chemicals, which is a wet and flammable material, and its production process produces many occupational hazards such as high temperature, high pressure, acetylene, carbon monoxide, carbon dioxide, sulfur dioxide and dust, and is accompanied by high voltage and high current, in the production process of burning, suffocation and poisoning, mechanical injury, object strike, falling from height, drowning, etc. are all frequent accidents. If the overall safety of equipment and facilities is insufficient or there are various reasons such as misoperation, it is easy to cause all kinds of major accidents. In recent years, a number of calcium carbide furnace accidents have occurred in the calcium carbide production industry, which has caused serious personnel and major property losses and bad social impact, which fully illustrates the danger and degree of harm of calcium carbide production.

When the calcium carbide is affected by water or moist air, it releases acetylene gas, and the concentration of air is mixed to form a first-class mixture, if the water in the room or container enters the calcium carbide, a large amount of acetylene gas and heat can be released, if there is any ignition source, it can cause combustion and **.

In the production process, calcium carbide is smelted at a high temperature of about 2300 degrees in the calcium carbide furnace, and harmful gases and dust such as carbon monoxide, carbon dioxide, and sulfur dioxide are released at the same time.

Carbon monoxide (CO) is colorless, tasteless, odorless, toxic gas, at a temperature of 15 20, when the relative density of air is 1, the density of CO is. When carbon monoxide and air are mixed to reach a certain concentration ratio, it will cause combustion and **, at 18 19 hours, carbon monoxide in the air concentration reaches the range when **, and at 650 hours when it comes into contact with the air will automatically ignite.

When the carbon monoxide content in the air is there, people will be poisoned to death after 1 hour of inhalation, and when the concentration is increased to above, people will be poisoned and die after 15 minutes of inhalation; Its safety concentration is controlled below to ensure personal safety.

Carbon dioxide (CO2) is generally harmless, but it can cause a suffocating effect, and when the concentration of carbon dioxide in the air reaches 3 4%, it can increase the heartbeat; When the content reaches 8%, it can cause severe headaches, and if it exceeds 10%, it is enough to suffocate to death.

Sulphur dioxide is generated from furnace exhaust gases because the raw materials (mainly carbon feedstocks) contain a certain amount of sulphur. The allowable limit concentration of sulfur dioxide (SO2) is milligrams of air. When the calcium carbide furnace is baked, it contains some sulfur dioxide gas, but at a distance of 4 to 5 meters from the furnace mouth, there is usually no sulfide gas.

The white ash, carbon materials and dust discharged by calcium carbide furnace are harmful to human respiratory organs, visual organs, etc.

One of the main consumables of calcium carbide furnace production is electrical energy, the current passing part of the electric furnace equipment must be well insulated, and the contact conduction will cause the human body to be injured or even killed.