Are there any harmful substances produced in the production of silicon carbide?

Harmful substances in the production process of silicon carbide mainly include the following categories: 1. Air pollutants: dust, soot, carbon monoxide (a small amount), carbon dioxide (a large amount), and may also contain sulfur dioxide, nitrogen oxides, etc.

2. Water pollution: mainly due to high salinity, if there are farmland and lakes nearby, and the plant mainly treats sewage in the form of discharge, the pollution can be imagined. 3. Light pollution:

The production process requires ignition operation, that is, the smelting furnace body is burned and smelted in the open air, and there is a fire, which will affect the daily rest of residents if it is a residential area nearby. However, air pollution is the mainstay, as for how far the harm is, depending on the wind direction where the plant is located, such smelting projects are not allowed to be approved now, and they are national restricted projects.

The main pollutants in silicon carbide production are carbon monoxide and hydrogen sulfide. Carbon monoxide is left over from the smelting process when carbon is silicified to form SiC, although most of the carbon monoxide is burned off the surface during smelting, and some of it still spills into the air, so the smelting workshop is open. Hydrogen sulfide is the most toxic, the country has a standard, more than a certain solubility of the throat will feel uncomfortable and even poisoned, is a harmful gas that causes laryngeal cancer.

Generally, it is caused by the high sulfur content of petroleum coke, so the sulfur content of petroleum coke should be strictly controlled.

Silicon carbide smelting is currently inseparable from electricity, power consumption (7000-1800) kWh tons, therefore, the smelting cost of silicon carbide is basically related to the price of electricity, only in underdeveloped industrial areas, the electricity price is cheap or the use of abundant water and electricity prices can be smelted.

Water treatment must meet national standards. It is more difficult, and many factories have stopped production because of unqualified pollution. Water treatment projects can be done, and the investment is large.

Silicon carbide is corroded by hydrofluoric acid, and generally hydrogen fluorine can only react if it is in solution.

Silicon carbide:Silicon carbide is an inorganic substance with the chemical formula SiC, which is smelted at high temperature by a resistance furnace with raw materials such as quartz sand, petroleum coke (or coal coke), and wood chips (salt needs to be added to the production of green silicon carbide). Silicon carbide is also found in nature with a rare mineral, moissanite.

Among the non-oxide high-tech refractory raw materials such as C, N, and B, silicon carbide is the most widely used and economical one, which can be called gold steel sand or refractory sand. China's industrially produced silicon carbide is divided into two types: black silicon carbide and green silicon carbide, both of which are hexagonal crystals.

A: If there are no other impurities in it, it is absolutely corrosion-resistant.

Silicon carbide dust will be harmful, silicon carbide dust inhaled through the respiratory tract will cause cough, sputum, chest pain, chest tightness, shortness of breath, dyspnea, etc., hilar density increases, widening, lung texture distortion and deformation, thick and fine mesh and other symptoms.

Hazard protection: use dust protective equipment: dust masks, dust glasses, dust helmets, dust clothing, dust shoes, etc.; Pay attention to personal hygiene, do not smoke, put an end to taking dust-contaminated work clothes home, conduct regular physical exercise, strengthen nutrition, and enhance personal physique.

Silicon carbide is not toxic, but it does not mean that it is harmless to humans. Silicon carbide powder inhalation too much will become pneumoconiosis! Silicon carbide powder is harmful to the human body:

No major damage was found in direct physical contact, and a small number of people may have ** allergies. If inhaled in a small amount, it will not do much harm to the body, if it is inhaled too much, or if it is often exposed to silicon carbide powder, it may cause pneumoconiosis, which begins to separate at a temperature of 2815 °C, but does not dissolve at atmospheric pressure. Therefore, silicon carbide powder is harmful to the human body.

Silicon carbide (SiC) is made by smelting at high temperature in a resistance furnace with raw materials such as quartz sand, petroleum coke (or coal coke), and wood chips (salt is required to produce green silicon carbide). Silicon carbide is also found in nature with a rare mineral, moissanite. Silicon carbide is also known as moissanite.

Among the contemporary non-oxide high-tech refractory raw materials such as C, N, and B, silicon carbide is the most widely used and economical one, which can be called gold steel sand or refractory sand. At present, China's industrial silicon carbide is divided into black silicon carbide and green silicon carbide, both of which are hexagonal crystals, with a specific gravity of 2840 3320kg mm2.

The silicon carbide industry should not be polluting. However, as long as it is an industrial raw material, then remember that after a long time, there will be dangers to pay attention to.

It belongs to dust, and after a long time, it will get pneumoconiosis, which is an occupational disease that cannot be cured so far, but as long as you wear a special product cover, it is not a big deal, and some of the workers in our factory who do this have been doing it for more than ten years.

Hehe, silicon carbide simple grinding only pollutes its own factory, if it is washed, hehe. This needs to treat the sewage, which is quite difficult, and generally small factories are unwilling to deal with it, the investment is large, and the cost becomes high. The main hazard is wastewater, which is basically acid and alkali.

Nothing else.

Although it has carbon elements, the properties it presents are inorganic substances, so it is also classified as inorganic, which is the same reason that carbon dioxide is not classified as organic matter. The molecular formula is sic, its hardness is between corundum and diamond, the mechanical strength is higher than corundum, and it can be used as an abrasive and some other industrial materials.

In a narrow sense, organic compounds mainly refer to compounds composed of carbon and hydrogen, which must contain carbon, but do not include carbon oxides and sulfides, carbonic acid, carbonates, cyanides, thiocyanides, cyanates, carbides, carboranes, carbonyl sail metals, metal-organic ligand complexes without M-C bonds, and some metal-organic compounds (substances containing M-C bonds) and other carbon-containing substances mainly studied in inorganic chemistry.

Compared with inorganic matter, the main characteristics of organic matter are: most of them are covalent compounds, and the solid state is a molecular crystal, which has a lower melting point (generally below 300), a boiling point, and a small polarity, which belongs to non-electrolytes. Most of them are flammable and easily decompose when heated.

Most of them are insoluble in water, and are easily soluble in organic solvents such as ethanol, ether, acetone, benzene, gasoline, etc. The reaction of organic matter is mostly molecular reaction, the reaction speed is slow, and it is often necessary to add nuclear heat, light or catalyst. There are many side reactions in organic reactions, the yield is low, and the products are often mixtures.

Isomerism is widespread.

Yes, an excess of industrial silicon produces calcium carbonate. Due to the strong waxing force of the oxygen plexus, when it reacts with water, it will produce a large number of mild acidic substances that can form calcium carbonate by absorbing Huizhenglu carbonate.