What are the hazards and side effects of lime powd

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Lime powder, a white powdery substance with calcium carbonate as the main component. The application range is very wide, and the most common is calcium carbonate used in the construction industry, that is, industrial use; The other is food grade calcium carbonate, which is widely used as a common calcium supplement. There are two kinds of commonly used calcium supplements and nutritional enhancers - calcium carbonate: one is heavy calcium carbonate, which is limestone crushed to a certain fineness to be used as food additives; The other is light calcium carbonate, which is obtained by calcining limestone

lime powder, white powdery substance. The application range is very wide, and the most common is calcium carbonate used in the construction industry, that is, industrial use. Heating limestone will produce chemicals called lime powder or calcium oxide. Generally, the application of calcium oxide food with a concentration of less than 2 mg is not harmful, but the concentration of more than 25 mg will lead to serious side effects such as pneumonia. Therefore, if you have been exposed to or ingested lime powder, it is best to consult a doctor to take necessary countermeasures. So what kind of material is lime powder? What are the uses and classifications of lime powder? Today, I will give you a brief introduction about the use and classification of lime powder, hoping to help you

introduction to lime powder

first, let's take a look at the basic situation of lime powder and have a simple understanding of it. Lime powder is a kind of white powdery material, which is widely used. The most common is used in the construction industry, because it is an important building material. Lime powder has another name we are familiar with, that is industrial calcium carbonate. This is named for the composition of lime powder. Lime powder plays an important role in modern construction industry

classification of lime powder

next, let's look at the classification of lime powder. Through the understanding of Xiaobian, lime powder can be divided into the following three categories. The first is a kind of lime powder with calcium carbonate as the main component. The other is light calcium carbonate, which is obtained by firing limestone. This kind of lime powder has impure ingredients and poor quality. There is another kind of lime powder, which has complex components

use of lime powder

lime is widely used in civil engineering, and its main uses are as follows:

(1) lime milk and mortar slaked lime powder or lime paste mixed with a large amount of plastering. Lime mortar or cement lime mixed mortar can be prepared with lime paste or hydrated lime powder for masonry or plastering works

(2) lime stabilized soil the mixture obtained by mixing, compacting and curing hydrated lime powder or quicklime powder mixed into various crushed or originally loose soil is called lime stabilized soil. It includes lime soil, lime stabilized gravel soil, lime gravel soil, etc. Lime stabilized soil has certain strength and water resistance. It is widely used as the foundation of buildings, the cushion of the ground and the pavement base of roads

(3) silicate products take lime (hydrated lime powder or quicklime powder) and siliceous materials (sand, fly ash, pozzolana, slag, etc.) as the main raw materials, and can be made into bricks, blocks and other products after batching, mixing, forming and curing. Because the internal cementitious material is mainly hydrated calcium silicate, it is called silicate products, and commonly used are lime sand bricks, fly ash bricks, etc

lime powder production process

the original lime production process is to lay limestone and fuel (wood) in layers, ignite and calcine for a week. In modern times, mechanized and semi mechanized shaft kilns, rotary kilns, fluidized beds and other equipment are used for production. The calcination time is also shortened correspondingly. It takes only 2 ~ 4 hours to produce lime in rotary kiln, which can improve the production efficiency by more than 5 times compared with that in shaft kiln. Cross flow, double slope, oil fired circular shaft kilns and short rotary kilns with preheaters and other processes and equipment with significant energy-saving effects, and the fuel is also expanded to coal, coke, heavy oil or liquefied gas

packed in plastic woven bags lined with polyethylene plastic film bags, with a net weight of 25kg per bag. It should be stored in a dry warehouse. Strictly prevent moisture. Avoid storing and transporting with acids. Rain proof during transportation. In case of fire, water, sand or ordinary fire extinguishers can be used to put out the fire. White powder with fine physical properties. The relative density is 2.24. Calcium carbonate is formed by absorbing carbon dioxide in the air. Soluble in acid, ammonium salt, glycerin, slightly soluble in water, insoluble in alcohol, strongly alkaline, corrosive to skin, fabrics, utensils and other substances. Its aqueous solution is commonly known as lime water

hazards and side effects of lime powder

contact effects

direct contact with lime powder with a concentration of more than 25 mg, also known as quicklime, will cause damage to eyes and skin. This white granular powder irritates the eyes and causes dry and inflamed skin. In order to protect your body, you should wear protective glasses, gloves, boots, hats and clothes to avoid direct contact with lime powder. If your eyes come into contact with quicklime, turn over your eyelids immediately and rinse thoroughly with clean water for 15 minutes. Of course, don't forget to clean your skin to prevent skin problems

inhalation effect

inhalation of 25 mg of calcium oxide will lead to respiratory adverse reactions such as cough, sneezing and shortness of breath. High concentration of lime powder may cause perforation of nasal septum. This substance will stimulate the upper respiratory tract, leading to repeated episodes of bronchitis. In addition, inhalation of quicklime will also cause pulmonary fluid retention, pulmonary edema, and inflammation of lung tissue. Therefore, after contacting the lime powder, you should leave immediately and see a doctor in time according to the situation

intake impact

intake of lime powder will cause mild to serious consequences, such as gastrointestinal discomfort and constipation. Swallowing quicklime will also lead to excessive blood calcium, nausea, spasm, loss of appetite, vomiting and other symptoms, and even kidney and muscle diseases. In addition, eating quicklime may also cause abnormal bleeding or massive bleeding, which needs to be sent to the emergency room for treatment immediately

crystalline silica influence

silica crystallization, also known as quartz, is the basic component of soil, sand, granite and other minerals, and a small amount of it exists in lime powder. In addition to being classified as a lung carcinogen, crystalline silica can also cause a fatal lung disease called silicosis. Silica dust can scar the lungs, prevent oxygen inhalation, and make breathing difficult. The most common form of this disease is chronic silicosis, which will occur 15-20 years after exposure to quartz, but people who are exposed to a large amount of crystalline silica may become ill within 5-10 years

editor's summary: the above is the introduction of the relevant knowledge about the use of lime powder and the hazards and side effects of lime powder. I hope it can help friends who need this! For more information about you, please continue to follow our website, and more wonderful content will be presented in the future




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