The preparation method of calcium carbonate is divided into physical method and chemical method. The calcium carbonate prepared by the physical method is called heavy calcium carbonate(ground calcium carbonatebecause of its large specific gravity, and the calcium carbonate prepared by the chemical method is called light calcium carbonate or precipitated calcium carbonate. When the size of the calcium carbonate particles reaches 100 nm or less, it is called nano calcium carbonate.
The physical method refers to a method in which no chemical reaction occurs from the raw material to the entire preparation process of the particles, that is, a method of mechanically pulverizing natural limestone or attapulgite having a high calcium carbonate content to obtain a calcium carbonate product. However, it is quite difficult to pulverize to 1 m or less with a pulverizer, and it is possible to achieve 0.1 m or less only by a special method and machine.
The precipitation reaction method refers to a method of reacting a water-soluble calcium salt such as calcium chloride with a water-soluble carbonate such as ammonium carbonate and sodium carbonate under suitable conditions to obtain calcium carbonate. This method can control the concentration of the reactants and the supersaturation of calcium carbonate, and add appropriate additives to obtain amorphous calcium carbonate having a spherical shape, a very small particle diameter, a large specific surface area, and good solubility.
Carbonization is a common method for the preparation of nano-CaCO3 by chemical methods. It is made from high quality limestone and calcined. CaO and CO2 are produced. The calcium oxide is digested with water to form calcium hydroxide (Ca(OH)2 emulsion. Then, the carbon dioxide gas generated by the calcination process is introduced, and an appropriate crystal form controlling agent is added to carbonize to the end point to obtain the desired crystal form of calcium carbonate. The slurry is further dehydrated, dried, sieved, and surface treated to obtain a nano calcium carbonate product.
An aqueous solution of 20 g/L polyvinylpyrrolidone (PVP) was accurately prepared. Take out two copies of PVP (20 mL solution was added to CaCl2 solution (0.1 mol/L, 50 mL) and Na2CO3 solution (0.1) In mol/L, 50 mL), the mixture was stirred vigorously and reacted in a water bath at 20 C for 0.5 h. Dodecylsulfonic acid A sodium (SDS) aqueous solution (0.05 mol/L, 20 mL) was added to the above Na2CO3 solution for 0.5 h. The above CaCl 2 solution was quickly poured into a Na 2 CO 3 solution under stirring, and subjected to a water bath at 20 C for 1 hour under stirring, and the stirring speed was maintained at 200 rpm. Inside the spatial network structure, calcium carbonate crystals nucleate and grow. The white precipitate was separated from the mother liquor, and the obtained product was filtered, washed with absolute ethanol and distilled water, and then placed in an oven at 80 C for 24 hours.
An aqueous solution of 0.2 g of sodium polyacrylate (PAAS) was accurately prepared. Add it to the CaCl2 solution (0.1 mol/L, 50 mL), vigorously stirred, and reacted in a water bath at 80 C for 0.5 h. The above mixed solution was quickly poured into a Na2CO3 solution (0.1 mol/L, 50 mL) under stirring, and reacted in a water bath at 80 C for 3 h under stirring. The stirring speed was maintained at 200 rpm, and the white precipitate was separated from the mother liquid to obtain a product. After filtration, anhydrous ethanol and distilled water were repeatedly washed and dried in an oven at 80 C for 24 hours.
1. Carbonization method Calcining raw materials such as limestone to produce lime (the main two components are calcium oxide) and carbon dioxide and then adding water to digest the lime to form lime milk (the main component is calcium hydroxide) and then pass carbon dioxide to carbonized lime milk to form calcium carbonate to settle the final calcium carbonate. Light calcium carbonate is obtained by dehydration, drying and pulverization.
3. Causticization subtraction In the process of producing caustic soda (Na0H), by-product light calcium carbonate can be obtained. Calcium carbonate precipitation can be formed by adding slaked lime to an aqueous solution of soda ash, and at the same time, an aqueous solution of caustic soda is obtained. Finally, the calcium carbonate precipitate is dehydrated, dried and pulverized to prepare light calcium carbonate.
4. Calcium method The hydrated lime is treated with hydrochloric acid to obtain a calcium chloride solution. The calcium chloride solution is carbonized with carbon dioxide after inhaling chlorine gas to obtain calcium carbonate precipitation.
5. Solvay method In the process of producing soda ash, permeate calcium carbonate can be obtained as a by-product. The saturated brine is carbonized with carbon dioxide after inhaling ammonia gas to obtain a heavy alkali (sodium hydrogencarbonate) precipitate and an ammonium chloride solution. Calcium chloride aqueous solution is obtained by adding lime milk to the ammonium chloride solution, and then carbonizing it with carbon dioxide to obtain calcium carbonate precipitation.
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Limestone, which is primarily calcium carbonate, is a sedimentary rock made from the minerals calcite or aragonite. A large portion of limestone is made from the skeletal remains of sea creatures and organisms. Ground Calcium Carbonate (GCC) differs from Precipitated Calcium Carbonate (PCC) in that the GCC is formed directly from grinding limestone rock into a powder, while PCC is chemically produced and precipitated out as powder.
Ground Calcium Carbonate is used in paper and plastic fillers, coatings and paints. It is also used in cement, is converted to quick-lime (calcium oxide) and slaked lime (calcium hydroxide). Ground calcium carbonate is slightly basic and can be used to neutralize combustion vapors or increase the pH in water or soils.
One of the standard methods of milling Limestone/Calcium Carbonate is with the Mikro ACM Air Classifying Mill. The ACM has a rotating rotor disc with hammers which rotates with speeds up to 23,000 feet per minute. The particle size is controlled by the internal air classifier, to provide sharp particle size distributions. Various classifier designs are available, to produce from coarse (100 mesh) product down to a fineness of 635 mesh (20 m) product or a D50 of less than 5 m. Abrasion resistant options are available, including tungsten carbide tipping, Ni-Hard or Ceramic liners to assist with abrasive impurities and to assist with long life of mill components. Hot air can also be used to dry the product while milling.
An alternate to the ACM for coarser grade Calcium Carbonate is the Mikro Pulverizer Hammer & Screen Mill. The Pulverizer uses swing-hammers with interchangeable screen liners to produce a variety of products from 50 mesh to 150 mesh products. The Mikro Pulverizer Hammer & Screen Mill needs less air (less ancillary equipment) than the ACM and is a lower cost options for the coarser grind Calcium Carbonate products.
For plastic fillers, stearic acid coating on ground calcium carbonate is often performed. Very uniform coatings are produced using Hosokawa Alpines Contraplex (CW) pin mill coating system or Mikro LGM Long Gap Mill for flash drying and coating at the same time.
GCC is widely used as functional filling material in plastic products, comprising up to 25% of the volume, adding density, improving rheology and reducing cost. GCC is often coated with additives such as stearates to aid bonding within the plastic. This function can finished by powder coating machine.
Fine grades of GCC are used extensively in paper manufacturing. Consistent particle sizing and color are essential. As an alkali material it reduces acidity of paper, improving the durability of printed material.
GCC is used as functional filler and pigment extender in a variety of coatings including decorative paints, industrial coatings, road-marking paints, protective coatings, textured finishes, plasters and wood finishes.
For fine and ultrafine calcium carbonate powder processing, ball mill, Raymond mill and vertical roller mill cannot meet the output size. For fine and ultrafine grinding, we can use HGM micro calcium carbonate grinding mill, the fineness can get D97 30-2500 mesh (74-5 micron) adjusted.
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Ball mill grinder is usually used to grind crushed materials, such as ores, chemicals, ceramic raw material and others. This article mainly talks about ball mill for grinding calcium carbonate. Ground calcium carbonate powder is in greater demand worldwide in various industries. Turnkey calcium carbonate ball mill plant is popular, for ball mill is an essential equipment for grinding calcium carbonate in great capacity. With constant upgrades, Daswell ball mill for grinding calcium carbonate has become more cost-efficient, durable and reliable. Paired with classifier, ball mill for grinding calcium carbonate can produce fine ground calcium carbonate powder D97(5-22m) and even ultra fine GCC powder with high capacity. Daswell machinery offers provides customized high quality ball mill and classifier equipment which work best for your calcium carbonate plant.
Daswell machinery is a serious player in calcium carbonate powder making industry. Daswell has successfully delivered several turnkey ground calcium carbonate projects around the world. Except for designing and planning, Daswell also provides complete set of realiable and durable ground calcium carbonate equipment. And ball mill combined with classifier is the central part of calcium carbonate production line. According to customers needs, Daswell ball mill for grinding calcium carbonate can come in different diameter and be paired with primary or secondary classifier. Daswell calcium carbonate ball mill machine is made of high grade steel which is durable to work long time with easy maintenance. Besides, Daswell ball mill machine for calcium carbonate is also the symbol of high technology, which consumes less energy and produce quality finished ground calcium carbonate powder.
Ball mill is a hollow cylinder which rotates about its axis. The axis can be horizontal or be at some angle to the horizontal. The shell of ball mill can be made of strong steel and coated with refractory materials. Ball mill is partially filled with free moving media balls which can be made of steel, stainless steel, ceramic or rubber. And the media balls are in different sizes: smaller grinding balls for fine calcium carbonate and larger media balls for coarse calcium carbonate. For the internal side, the inner wall of the ball mill is often lined with abrasive-resistant materials such as steel or rubber. And the length and diameter of ball mill grinder for calcium carbonate can come in different sizes according to production capacity.
Industrial ball mill machine for ground calcium carbonate often can operate continuously. And the raw material such as limestone or marble is fed from one end and discharged from another end. When the calcium carbonate ball mill starts to rotate under the function of drive, the media balls inside the ball mill will be lifted and then impacted against the calcium carbonate material bed. Through constant rotation, the raw material in the ball mill will be ground to medium and fine sizes. And then the ground calcium carbonate will be transported pneumatically to classifier. In the classifier, while the calcium carbonate powder of required sizes will be transported to product silo, the coarse ones will be returned to ball mill with feed material.
Ball mill and classifier often work together for calcium carbonate process. Although ball mill grinder for calcium carbonate can grind calcium carbonate material to medium and fine particle sizes, to meet customers needs of consistent fine and ultra fine GCC powder, calcium carbonate ball mill must work together with primary and even secondary classifiers. After the grinding process in calcium carbonate ball mill, the ground calcium carbonate will be transported to classifier pneumatically. The air flow in classifier will then transfer fine calcium carbonate powder to product silo, while the coarse calcium carbonate will return to ball mill together with feed material. For ultra fine ground calcium carbonate powder, a secondary classifier can be installed, forming a series circus with the primary classifier. In all, to produce uniform fine and ultra fine calcium carbonate powder in large quantity, calcium carbonate ball mill and classifying production line is the most suitable solution. Please fill the form below to get free quotes. We will reply in 24 hours. Product Model: Your Name(required): Your Email(required): Your Tel: Your country: Your Company: Your Message(required):
Grinding mill machine play an role important role in calcium carbonate processing plant. Calcium carbonate production line is used to produce ground calcium carbonate powder with various grinding equipment to grind limestone or marble.If you want to get the calcium carbonate powder with required fineness, you can choose the suitable calcium carbonate production line according to your requirement.According to the different requirement of powder fineness, production capacity and other factor, Daswell provide different turnkey slolution for the calcium carbonate production.
In Daswell, for the calcium carbonate powder production equipment, we provide various calcium carbonate grinding mill machine. Different calcium carbonate grinding mill machine has different characteristics. There are ball mill grinder, wet grinder for sale, micro powder roller mill, raymond mill.
Ball mill can produce good and stable product with less maintenance, easy to operate; Large outout, stable production porcess. Request A Quote Name:* Email:* Phone Whatsapp Message:*
As we all know, there are two ways to make calcium carbonate.Mechanically, calcium carbonate powder is mined, crushed and ground from a variety of raw materials.It is then sorted according to the required size.So this kind of calcium carbonate is called ground calcium carbonate powder. addition, there are two ways to produce calcium carbonate powder: dry and wet.In chemistry, calcium carbonate is made by chemical reactions. First, calcium hydroxide (Ca(OH)2) produce is prepared by adding water to quicklime (CaO).Calcium hydroxide then reacts with carbon dioxide to form calcium carbonate, so the end product is called precipitated calcium carbonate.Henan deswell machinery co., Ltd. is professional engaged in the design and planning of calcium carbonate production line, with high quality equipment and reasonable cost for ground calcium carbonate grinding mill to provide a customer-oriented production system.
Daswell is not only professional in providing turnkey calcium carbonate solution for customers worldwide, but also provide the quality calcium carbonate machine. Daswell has built several calcium carbonate production line around the world. In order to provide the suited solution for our customers, generally we will firstly consult the detials, such as the raw material, powder fineness, production capacity energy consumption, etc.
First, calcium carbonate raw materials such as limestone, calcite and marble are mined from quarries. Then they will be carefully selected and washed to ensure the quality of the finished calcium carbonate powder.And then these selected raw materials will be crushed by first and secondary crusher, such as jaw crusher and hammer crusher to get the required feed size.
Then these materials will go through the calcium carbonate grinding machine for the further grinding. Take the ball mill as the example: The procedure is that the raw materials are delivered into feed silo, then transported to the ball mill through vibrating feeding device. With the impact of media balls in the ball mill, raw materials are ground to fine calcium carbonate powder. Then calcium carbonate powder in ball mill will be blown by classifier, the required fine ground fine ground calcium carbonate powder will be sent to the product warehouse, and the coarse ground calcium carbonate powder will be back to the ball mill for the regrinding.And the final product will be packed and stored for usage.
A complete set of calcium carbonate grinding machine production line includes the grinding mill, classifier, dust collector sysytem, packing sysytem. Whats more, our Daswell whole calcium carbonate production process can be fully automatic and be controlled by operation panel.The operation is easy to control.
Daswell is professional in providing calcium carbonate powder turnkey solution and calcium carbonate grinding machine, if you have any demand for the calcium carbonate powder grinder machine, welcome contact us, we will reply you within 24 hours.
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The product particle size control is flexible, special design is adopted to reduce noise and emission. Automatic control, easy to operate. According to the scale of investment, it provides personalized customized scheme and provides value-added services.
According to different materials and application industries, the production capacity and particle size range will be different. Please contact our engineers to customize the equipment for you. Our experts will contact you within 6 hours to discuss your needs for machine and processes.
After coarse crushing, the material is fed into the ball mill through a controllable feeding device. The grinding medium in the mill repeatedly impacts and grinds the material by virtue of the kinetic energy obtained when the mill rotates. The crushed material is discharged into the suction tank through the tail of the ball mill, and then transported to the classifier for classification by negative pressure. The qualified fine powder is collected by cyclone collector or dust collector, The coarse particles after classification are discharged from the lower end of the classifier, and then re-enter the ball mill for crushing through the feeding pipe.
Note: The production capacity is closely related to the particle size, specific gravity, hardness, moisture and other indicators of the raw materials. The above parameters are for reference only, please consult our engineers for details.