Can quicklime be used repeatedly, and the correct way to use quicklime

No. The moisture absorption of lime desiccant undergoes chemical changes, and quicklime becomes slaked lime, and its physical properties are changed and cannot be reused. Physical desiccant (silica gel, clay) does not change its physical properties after moisture absorption, and can be reused by heating.

Quicklime cannot be used repeatedly after moisture absorption. The moisture absorption of lime desiccant undergoes chemical changes, and quicklime becomes slaked lime, and its physical properties are changed and cannot be reused. Physical desiccant (silica gel, clay) does not change its physical properties after moisture absorption, and can be reused by heating.

Quicklime: quicklime, also known as burnt lime, the main component is calcium oxide, which is usually prepared by calcination of natural rocks with calcium carbonate at high temperatures, which can be decomposed to produce carbon dioxide and calcium oxide (that is, quicklime, also known as marble).

All natural rocks with calcium carbonate as the main component, such as limestone, chalk, dolomitic limestone, etc., can be used to produce lime. In coastal areas, shells are used as raw materials, which are fired into shell ash and used as quicklime.

Quicklime is a commonly used desiccant to remove water vapor by chemical absorption, and is also used for steel, pesticides, medicines, desiccant, tanning and alcohol dehydration. It is especially suitable for puffed food, shiitake mushrooms, fungus and other local products, as well as products in instrumentation, medicine, clothing, electronic telecommunications, leather, textile and other industries.

Yes, quicklime is calcium oxide, which can be used as a desiccant to absorb water to turn calcium hydroxide, and then carbon dioxide.

The reaction becomes calcium carbonate.

Calcium carbonate regenerates calcium oxide, water and carbon dioxide at high temperatures.

The correct use of quicklime: sprinkling, hole or furrow application, irrigation, spraying.

1. Spreading: It can be evenly sprinkled on the ground first, and then deeply ploughed into the underground soil, usually we use quicklime per mu in about 30-100 kg. We can depend on soil fertility and soil properties.

2. Hole application or furrow application: We should use hole or furrow application before the peak period of crop diseases and pests or in the early stage of occurrence. Specific dosage:

It is recommended that quicklime should be evenly sprinkled with about 25-30 kg per mu of Chanchun, and then about 10-15 kg or about 200-250 grams per hole in the ditch.

3. Drenching: When we are drenching. Quicklime and water can be mixed into an aqueous solution in a ratio of 1:4, and after being fully dissolved, it can be drenched around the root system of crops, but it should be noted that we should not make lime water directly contact the roots of crops when drenching.

4. Spraying: first dilute the lime into a 5-10 lime aqueous solution, and then spray its filtrate He Younai.

Precautions for the use of quicklime

1. The shorter the operation time, the better, and place it in the appropriate place in the packaging container to play the role of sealing and moisture absorption.

2. Store in a dry warehouse, moisture-proof, and avoid contact with acids.

The above content is carefully considered: Encyclopedia - quicklime.

InQuicklimeAdd an appropriate amount of water, and the product formed after the reaction isHydrated lime

1. Ash spraying method.

As the name suggests, the lime is drenched with water, which causes it to undergo a chemical reaction and become hydrated lime. When spraying ash, pay attention to the position and take protective measures. In the process of maturation, because it is drenched with water, the heat release is uneven, and splashing may occur, so in this process, it is necessary to try to control the water pressure to avoid excessive water pressure, so that it is evenly poured on the quicklime to complete the transformation.

This method is called lime paste formed by adding too much water.

Second, the ash method.

The law of ashing is to use the water absorption characteristics of quicklime and let it absorb water naturally, but this process is relatively slow, and the powdered hydrated lime formed is also called dry ash.

The main component of quicklime is calcium oxide, which reacts with water to form calcium hydroxide.

i.e. hydrated lime. The process of reacting quicklime with water to produce calcium hydroxide is called the curing or digestion of lime, which reacts with water while releasing more heat, or absorbing moisture from moist air, that is, mature lime.

Quicklime is usually made by using calcium carbonate as the main component.

of natural rocks, calcined at high temperatures, decompose to produce carbon dioxide.

and calcium oxide. Cooked lime is often used on the construction site.

Slurry method and slaked lime powder method.

Hydrated lime generally refers to calcium hydroxide, which is a white powdery solid, which is divided into two layers after adding water, and the upper layer of aqueous solution is called clarified lime water.

The lower suspension is called lime milk or lime slurry.

Function: 1. It can be used as a desiccant, 2. It can be used as a building material, 3. It can improve the soil.

Quicklime can be used as a desiccant and has a good dehumidification effect. Because it reacts with moisture in the air, it reduces the humidity in the room and keeps the room dry.

Especially when the air is humid, sprinkle quicklime on the corners of the wall, which can play a good moisture-proof effect. Quicklime can also be used in construction projects, for example when plastering walls, mixing it into cement mortar and then using it to coat walls.

Quicklime can also be used to improve the soil, and for acidified soil, you can bury some quicklime in it appropriately, so that you can change its pH value. At the same time, quicklime will also produce a certain amount of heat after being in the soil, which can effectively eliminate pests in the soil.

Quicklime generally contains over-fired lime, which matures slowly, and if it is cured after the lime slurry is hardened, it will cause uplift and cracking due to the expansion produced by curing.

Lime and limestone are used in large quantities as building materials and are also important raw materials for many industries. Limestone can be processed directly into stone and fired into quicklime. Lime has quicklime and hydrated lime.

The main component of quicklime is CAO, which is generally lumpy, pure white, and light gray or light yellow when containing impurities. Quicklime absorbs moisture or adds water to become slaked lime, which is also called slaked lime.

Quicklime generally contains over-fired lime, which matures slowly, and if it is cured after the lime slurry is hardened, it will cause uplift and cracking due to the expansion produced by curing. In order to eliminate this hazard of over-fired lime, the lime should be "aged" for about 2 weeks after it is cured.

It is white (or gray, brownish-white) in shape, amorphous, and absorbs water and carbon dioxide in the air. Calcium oxide reacts with water to form calcium hydroxide and releases heat. Soluble in acid water, insoluble in alcohol.

It is an inorganic alkaline corrosion article. Quicklime reacts chemically with water and is immediately heated to temperatures of over 100 °C.

Lime is divided into quicklime and hydrated lime. The main component of raw stone-based limestone ash is calcium oxide (CAO), which is obtained by calcining limestone with high calcium carbonate (CACO) content in a ventilated lime kiln to more than 900. It is absorbent and can be used as a desiccant, which is commonly used by Chinese folk to prevent the resurgence of debris.