malacca high end environmental gypsum rotary kiln

the most valuable things you need to know about gypsum | fote machinery

the most valuable things you need to know about gypsum | fote machinery

The general term gypsum refers to two minerals, raw gypsum and anhydrite. Raw gypsum is calcium dihydrate (Ca [SO4] 2H2O), also known as dihydrate gypsum or plaster. Anhydrite is anhydrous calcium sulfate.

It is a very important industrial raw material that is widely used in construction, building materials, industrial and artistic models, chemical industry (sulfuric acid production, paper filler, paint filler), agriculture, food processing, pharmaceutical, and many other industries and applications.

The plaster of Paris (also known as hemihydrate gypsum), divided into -type gypsum powder and -type gypsum powder, is formed from gypsum raw materials by heating at a high temperature of 105-200 .

The -type gypsum powder has good crystallinity and solidity, so it can be used in ceramic molds, sculptures, gypsum lines and high-end buildings. The -type gypsum powder is mainly used for mortar levelling, gypsum board production, painting, etc.

Gypsum powder can be used as Portland cement retarder in the concrete industry. In agriculture, because gypsum powder is alkaline, it is possible to sprinkle it into the acidic soil to integrate the ph value of the soil so as to make use of a lot of lands.

In the pharmaceutical industry, gypsum is the main medicine in the famous Chinese medicine " Baihu Tang ", which has a good effect in treating acute high fever and thirsty irritable. In addition, dentists use plaster to make models of gums, and surgeons also use plaster to repair the fractures.

Is gypsum harmful to humans? Is gypsum powder safe to eat? Will gypsum kill plants? Here is a video about how gypsum is used, including its uses in toiletries, food additive, fertilizer, chalks, etc. It also shows the process of gypsum.

In recent years, the gypsum industry has developed rapidly. Gypsum building materials are increasingly welcomed by the market and recognized by society with their applications becoming more and more widespread.

According to the US mining forecast, the world's gypsum demand will increase at a rate of 2.5% in the next few years. It is estimated that the world's gypsum demand will reach 300 million tons in 2030. The total annual consumption of the gypsum board will reach 2.04 billion square meters.

With the increase in the market demand for gypsum powder, the requirements for its production technology are getting higher and higher, so the price has risen accordingly. The price of gypsum powder is generally calculated in tons.

Its price varies with its accuracy and use. The price of gypsum powder is between $ 28.8-$ 403.6 per ton according to its whiteness and fineness. The cooked gypsum powder is about $ 28.8-$ 158.6 per ton, the cooking gypsum is about $ 72.1-$ 317.2 per ton, and the refined gypsum powder is about $ 201.8-$ 720.8 per ton.

1. The ex-factory price of Australian recycled gypsum is $ 35.00 per ton, plus $ 25 per ton freight, which is $ 60.00 per ton at the farm gate, and $ 10.00 per ton to spread. Its purity is measured at 17% S wet weight. Total cost of gypsum supply and application per ton of pure CaSO4.2H20 = (35+25+10) 18.6 17 = $ 76.59 per ton.

2. The ex-factory price of gypsum mined in New South Wales is $ 15 per ton, plus $ 40.00 per ton freight, which is $ 60.00 per ton at the farm gate, and $ 11.00 per ton to spread. Its purity is measured at 15% S wet weight. Total cost of gypsum supply and application per ton of pure CaSO4.2H20 = (15+40+11) 18.6 15 = $ 81.84 per ton.

The world's major gypsum producing countries are the United States, Iran, China, Brazil, Canada, Mexico, Spain, Thailand, etc. The United States, Brazil, China, and Canada are rich in gypsum resources.

The largest consumption area of gypsum is the building decoration material industry, which is mainly used to manufacture gypsum boards for construction and decoration. In many countries, the manufacture of slabs accounts for more than 80% of gypsum consumption.

The mining technology of gypsum ore is divided into two categories: the mining of fibrous gypsum ore and the mining of alabaster, ordinary gypsum and anhydrite mines. Due to the difference in physical and mechanical properties of the ore and surrounding rock, the mining technology of these two kinds of gypsum mines is very different.

Fibrous gypsum has low hardness and its rock consolidating coefficient is 1.2 for parallel fibrous gypsum and 1.5 for vertical fibrous gypsum. Because it is brittle, it will easily become fine ore to be lost. Due to the high price of the ore, most fibrous gypsum mines adopt the longwall method, selective mining and filling method.

The mining techniques of alabaster mine, ordinary gypsum mine and anhydrite mine are similar. The room and pillar mining method (generally 8-12 m in width) and breasting method are adopted. The drilling of gypsum ore is easy, but the explosive consumption is large, generally 0.34 kg/t.

The roller drilling rig is modern new drilling equipment. It is suitable for drilling operations of various hardness of minerals and rocks with the characteristics of high perforation efficiency, low operating cost, high mechanization and automation. At present, it has become a widely used perforation equipment in open-pit mines all over the world.

The excavator is composed of the power plant, working device, swing mechanism, control mechanism, transmission system, moving mechanism, auxiliary equipment, etc. The excavator can also perform pouring, lifting, installation, piling, ramming, and pile pulling operations after changing its working device.

After sieving with the vibrating screen equipment, the finished material conforming to the size is sent to the finished product area, while the large material is returned to the crusher for being crushed again until it meets the required size.

The common gypsum crushing equipment is the jaw crusher with a crushing ratio of 4-6. The jaw crusher, which is often used as the primary gypsum crushing equipment, can crush large pieces of gypsum into 150 mm particle size.

If the gypsum crushed by the jaw crusher cannot meet the particle size requirements, secondary gypsum crushing equipment such as cone crushers, hammer crushers, and impact crushers can be equipped to carry out further medium and fine crushing of gypsum. Specific equipment should be configured depends on the actual needs of the customer.

The crushed gypsum is sent to a ball mill for grinding until 90% of it is less than 149 m (100 mesh). The ground gypsum powder leaves the mill in the form of airflow and is collected in the cyclone separator.

The ball mill is mainly a machine for dry or wet grinding of the crushed gypsum. The machine is mainly used for repeated grinding of the raw materials in the barrel through the steel ball medium in the ball mill to complete the ball grinding operation.

The cyclone separator is suitable for purifying non-viscous, non-fibrous dry dust larger than 1-3 microns. It is purification equipment with simple structure, convenient operation, high-temperature resistance and low equipment cost.

Under the design pressure and air volume conditions, solid particles 10 m can be removed. At the operating point, the separation efficiency is 99%, and within 15% of the operating point, the separation efficiency is 97%. Under normal working conditions, the pressure drop of a single cyclone separator at the operating point is not greater than 0.05 MPa.

The gypsum material is lifted by an elevator and transported into the top silo of the rotary kiln preheater. Then, the gypsum material is evenly distributed into rooms of the preheater through the feeding pipe.

In the preheater, gypsum is heated to about 900 C by the flue gas of the roasting kiln at 1150 C, and about 30% of it is decomposed. Then, it is pushed into the rotary kiln by a hydraulic push rod, and -type hemihydrate gypsum (180240 ), anhydrous gypsum (350 ) and overfired gypsum (450700 ) can be produced.

The gypsum produced after calcining and decomposing in the rotary kiln is sent to the cooler to be cooled to below 100 C by the cold air blown in the cooler and discharged. The gypsum from the cooler is sent to the product warehouse via a vibrating feeder, bucket elevator, and belt conveyor.

Gypsum rotary kiln is a kind of thermal equipment for calcining gypsum. Its appearance and shape are similar to lime rotary kiln and cement rotary kiln. Its main structure includes kiln head, kiln tail sealing device, rotary cylinder, supporting device, back-up roll device, etc.

The finished gypsum clinker calcined in the gypsum rotary kiln produced by Fote has the characteristics of high taste, high purity, easy to control during the production process, high mixing degree of raw materials, uniform raw meal composition, high strength grade of the clinker, with less dust in the grinding process, less fly ash in the calcining process and reasonable price.

The large demand and wide application of gypsum powder have stimulated the prosperity of many industries and fields, so the production of high-quality gypsum powder is the general trend of the gypsum powder industry in the future.

Fote Heavy Machinery, as one of the three major mining machinery manufacturers in China, has 38 years of experience. We are always ready to provide you with high-quality milling equipment and the best service.

As a leading mining machinery manufacturer and exporter in China, we are always here to provide you with high quality products and better services. Welcome to contact us through one of the following ways or visit our company and factories.

Based on the high quality and complete after-sales service, our products have been exported to more than 120 countries and regions. Fote Machinery has been the choice of more than 200,000 customers.

active carbon rotary kiln for producing activated carbon

active carbon rotary kiln for producing activated carbon

Activated carbon rotary kiln is one of the equipment with a high utilization rate for processing activated carbon. It is high-end equipment filled with advanced technology. Activated carbon rotary kiln has so many advantages such as advanced technology, simple operation, low carbon discharge, large production capacity, and high work efficiency.

Activated carbon rotary kiln is worth investing. The development of society and the improvement of peoples environmental requirements determines that activated carbon is going to play a big role in the environmental protection industry. The prospect of an activated carbon market is considerable. Therefore, keeping up with the national side, keeping abreast of the peoples life vision, advancing with the times, aka activated carbon rotary kiln, will certainly make you win in the strategic market.

Activated carbon rotary kilns working process. The qualified activated carbon material is stored in the silo, lifted by the hoist and transported to the top of the preheater. The top of the preheater is controlled by gauges, and then the material is evenly distributed through the discharge pipe to each chamber of the preheater. The material is heated in the preheater by the kiln flue gas at 1150 C to about 900 C, with about 30% decomposition, then be pushed into the activated carbon rotary kiln by the hydraulic push rod. The material is decomposed into CaO and CO2 by sintering in the activated carbon rotary kiln. The limestone formed after decomposition enters the cooler, and the cold air that is blown in the cooler is cooled to 100 C to be discharged, and the hot air of 600 C is exchanged and burned into the kiln and the gas. The exhaust gas enters the bag filter through the induced draft fan, and then enters the chimney through the exhaust fan.

rotary kiln for alumina is a widely used rotary kiln in calcinating sector

rotary kiln for alumina is a widely used rotary kiln in calcinating sector

Rotary kiln for alumina combines with domestic advanced technology and foreign progressive technology. Rotary kiln for alumina has a lot of advantages concluding simple operation, advanced technology, reasonable structure, stable performance, etc.

From a chemical point of view, rotary kiln for aluminas working content is a process of reasonably disposing of heterogeneous heat and mass transfer of solid and gaseous media. Those processes require both high operating technique and a lot of changing factors. So, it is more difficult in operating this process than heterogeneous heat or mass transfer process between gaseous and liquid. Alumina rotary kiln has a small inclination angle to the horizontal line. Raw materials flip up and down then move forward upon the inner wall with the rotation of kiln. Materials rotation keeps the air in the kiln contact with them to proceed with heterogeneous heat transfer and mass transfer operations.

rotary kiln | top kiln manufacture of rotary kiln, cement kiln and more

rotary kiln | top kiln manufacture of rotary kiln, cement kiln and more

AGICO manufactures all kinds of rotary kiln products for various industries, such as cement production plant, construction, chemicals and metallurgy. The main products include cement kiln, lime rotary kiln and more.

The rotary kiln is always used as a piece of professional machinery for heavy industries. As a chinese leading manufacturer, AGICO not only offers all kinds of rotary kiln and related products, but also provide the complete solution of calcination for various materials.

In order to better satisfy the environmental requirement, AGICO keeps upgrading the rotary kiln system, especially the water treatment, the desulfurization performance of the fuel and the proper treatment of the sulfur content.

We never stop improving the fabrication procedure with evolutionary technology. The enhanced pre-heater and main burner make the whole rotary kiln system use less fuel while maintaining an even better calcination result.

By analyzing the production statistics and improve it constantly, the daily productivity of our new rotary kiln is very close to the machinery from the world-leading players, especially for the lime rotary kiln and large cement rotary kiln.

Our open-type calcination design ensures a free interior airflow, it enables the gas inside the rotary kiln discharge timely. The simple structure also allows the material to move fluidly inside the rotary kiln so that the material can be heated evenly. This further guarantees a stable output.

The new enhanced pre-heater is installed at the kiln tail part. It largely improves the usage of the high-temperature air inside the rotary kiln to increase the efficiency of the pre-heating and decomposition, saving fuel.

Our lime rotary kiln is equipped with an enhanced vertical type cooler. This cooler can cool down the lime faster while increasing the lime activity, which results in easier storage and transportation and less energy consumption.

The temperature of the material inside the rotary kiln is around 1550 while the air temperature is around 1600-1700. The organic matter in the water residual can be cleaned up to 98%. Our rotary kiln has a longer length and a longer retention time for the material.

The waste gas is emitted via a longer channel, fine cooling process and a dust collection system. The content of dust and polluted air is largely reduced. It can meet the regulation requirement for emission. The collected dust can be utilized again by feeding back to the raw material preparation system. The discharged gas from kiln head and tail can be used from waste heat power generation.

AGICO group mainly focuses on major and medium series of rotary kiln products such as cement kiln, lime rotary kiln, shaft kiln, and sponge rotary kiln. Located in Anyang of China, AGICO owns a large heavy industrial factory, it has more than 100 pieces of equipment such as large and medium mental process machines, riveting equipment and assembly equipment with 200 staff and 50 managers and engineers.

What is a rotary kiln? As a piece of key equipment, the rotary kiln plays an increasingly important role in the cement production industry, chemical industry, metallurgy industry and more. The major function of a rotary kiln is to calcinate various materials in a very high temperature environment. During the calcination process, the raw material turns into the desired end products via a series of physical and chemical reactions.

Rotary kiln is not a whole block. It combined with different parts. The main structure contains kiln head, kiln body, kiln tail, support frame, preheating tower, cooler and conveyor. Kiln head consists of an inspection port, coal nozzle, and observation hole. Its diameter is longer than rotary kilns. Kiln body of rotary kiln is the main part of rotary kiln. Its general length is from 30 to 150 meters. It should be laminated refractory brick before running. Kiln tail looks a lot like a lid. It is in the feed end. It is also important which undertakes the ability to feed. Rotary kilns support frame makes kiln more firm. It makes the machine more convenient for lifting and transporting.

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