How is calcium carbide made? How is calcium carbide made?

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Reaction equation: CaO+3Cac2+Co, δH=+

This is a strong endothermic reaction, so it needs to be carried out in an electric furnace at 2100-2500K.

In the industry, the electric furnace smelting method and the oxygen heat method are generally used, and the electric furnace smelting method is to smelt coke and calcium oxide (molecular formula CaO) in an electric furnace of about 2200 to generate calcium carbide (molecular formula CaC2). Oxythermal method: i.e.:

Blast furnace oxygen-rich oxygen-based thermal smelting CAC2 (calcium carbide), limestone extraction of carbon, high temperature and low pressure gas generator. This furnace uses process technology to make comprehensive use of waste heat and coal ash in the coal gasification process in the production of CAC2, and the coal ash is melted with ingredients to generate CAC2 and ferrosilicon (filial piety when purifying CAC2);

This is the reason why calcium carbide gas has a smell, if it contains more P2H4 components, such gas, when it encounters air, it will spontaneously combust, and at the same time trigger the combustion of all gases, and it may be less than this, because the production of calcium carbide must be tested, but it contains pH3 and so on is inevitable, but it is a matter of how much, their ignition point is low. 3.The action of a large amount of calcium carbide and water, and the rapid release of reaction heat, can make the temperature rise very high, which can make the container **, and then cause the combustion of calcium carbide gas and cause accidents.

extinguish the sand cover. Remove the combustibles, cut off the power supply and open flames, and isolate the surroundings, remove the calcium carbide that has not been exposed to water, etc., ventilate the gas diffusion, reduce the dangerous situation, and the high temperature and low pressure "gas generator" gas generator makes the production (occurrence) of gas natural. For every ton of 80% CAC2 smelted, about 168kg of pure carbon is extracted from limestone, and 6000-2600m3 of coal gas (CO is 55%-95%) can be produced, which can produce about tons of methanol.

Oxygen enrichment not only increases the furnace temperature but also improves the CO quality of the gas, especially the oxygen is used for both purposes, and the gas after the utilization of coal thermal energy is used for coal chemical industry or clean power generation. This process is energy-free and pollution-free CAC2 production and gas production.

Closed operation, comprehensive parallel exhaust. Operators must be specially trained and strictly follow operating procedures. It is recommended that operators wear self-priming filtering dust masks, chemical safety glasses, chemical protective clothing, and rubber gloves.

Avoid dust generation. Avoid contact with acids and alcohols. Particular attention should be taken to avoid contact with water.

When handling, it is necessary to load and unload lightly to prevent damage to the packaging and containers. Equipped with emergency equipment for spill treatment. Empty containers may leave harmful substances behind.

The calcium carbide itself and the water will not catch fire, but in the following cases, the calcium carbide meets water, it is very likely to cause a fire, 1, because the reaction of calcium carbide and water is an exothermic reaction, in the case of poor heat dissipation, it will cause the surrounding temperature to rise, if it reaches a certain temperature value, it will cause the combustion of surrounding combustibles, 2, the purity of calcium carbide, in lime, often contains phosphate rock, and sulfate ore, or sulfide ore, they are reduced to phosphide such as calcium phosphide, etc., and calcium sulfide in the production process of calcium carbide, While calcium carbide and water react to produce calcium carbide gas, there will naturally be certain gases such as hydrogen sulfide and phosphine.

The main component of calcium carbide is calcium carbide, an inorganic compound, white crystals, and the industrial product is gray-black lumps, and the cross-section is purple or gray. Immediately and violently reacts violently with water, forming acetylene and releasing heat. Calcium carbide is an important basic chemical raw material, mainly used to produce acetylene gas.

It is also used in organic synthesis, oxyyne welding, etc.

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.

Calcium carbide is an important basic chemical raw material, mainly used to produce acetylene gas, and is also used in organic synthesis, oxyylene welding, etc. Calcium carbide itself can be used as a desulfurizer in the iron and steel industry, and in the old days, miners would put calcium carbide into iron cans and use the generated acetylene to make calcium carbide lamps.

What is calcium carbide used for

Calcium carbide refers to calcium carbide, which is an inorganic substance, and the industrial product is gray-black lumpy, with a purple or gray cross-section, and immediately reacts violently when exposed to water to generate acetylene and release heat.

If calcium carbide comes into contact with **, immediately remove contaminated clothing, rinse with plenty of running water for at least 15 minutes, and then seek medical attention.

Calcium carbide is stored in a cool, dry and well-ventilated warehouse, away from fire and heat sources, the relative humidity is kept below 75%, and the packaging must be sealed and not damp.