yuhong 50tpd lime kiln

lime rotary kiln_henan yuhong heavy machinery co.,ltd

lime rotary kiln_henan yuhong heavy machinery co.,ltd

Lime rotary kiln is the key equipment for the calcination of bauxite, clinker, limestone, etc.. According to the capacity of bauxite plant, clinker or cement plant, etc., we can help you select different size of rotary kiln,which is usually from 900mm to 4000mm.

Lime rotary kiln is mainly composed of kiln shell, refractory bricks, supporting device, supporting device with catch wheel, transmission device, lubrication device, mobile kiln head and sealing device at the end of the kiln.

5. Sealing equipment: there are many kinds for choice according to kiln models, including air cylinder edge sealing, spring edge sealing, and graphite block sealing and combination for above. The sealing effect is very good.

Material will be feed into kiln tail through chute in gas chamber. As kiln shell is inclined and it rotates slightly, material will move along round shell and will also move along shaft direction from kiln tail to kiln head. Material will be processed through pre-heat, decompose, calcined and will be feed into cooler. Fuel will be given through gas or coal burner at kiln head and will be combusted in kiln. Heat will be transferred to material by fire radiate, hot air flow, kiln brick transfer. The heat will heat and calcine material enough and make it final product.

1. Output of rotary kiln is high which is suitable large-scale active lime production line, meanwhile the lime rotary kiln production line with daily capacity of 2200tons has been put into operation in the world and many lime rotary kiln with daily capacity of 150-500tons has been built with good operation situation which is suitable for applying in middle or small scale lime enterprises.

2. Rotary Kiln belongs to open type calcining, the structure of kiln body is simple, airflow is unblock, the gas containing S could be exhausted in time meanwhile the S during burning is hard to adhering so the sulphur content of products is low which could meet the steel-making requirements. At the same time material will go ahead evenly inside kiln with even heating, so the quality of production is stable and crude burning rate and over-burning rate is very low thus it could calcine high activity lime for steel-making. Under the same condition, lime activity produced by rotary kiln which could be 340-380ml or even 400ml is over 30ml higher on average than that manufactured by gas kiln.

3. Rotary Kiln could directly calcine 10-50mm fine power level limestone, normally 0-30mm fine power level limestone accounting for 30-40% of total volume which couldnt be used for other type kiln. Complying with the fineness of steel raw material, sintering gradually takes use crude lime instead of limestone, as fine limestone couldnt be used comprehensively. Rotary kiln production line could not only use good limestone ore resources, but also meets the lime industry sustainable development policies.

4. Utilizing vertical preheater in kiln end could adequately use high temperature smoke created by calcining inside of kiln which could initially pre-break down from normal temperature preheating. This could not only largely increase output of rotary kiln, but also fully decrease heat consumption each unit product.

5. Utilizing vertical cooler in kiln head could not only cool quickly of high temperature lime and increase activity, but also it is convenient for conveying and saving. Meanwhile it could gain high temperature 2nd wind when entering into kiln, which could efficiently increase temperature inside of kiln, decrease burning consumption.

6The temperature of smoke discharged from vertical preheater of kiln end is low, normally it is between 280-350, whose dust containing is about 20g/Nm3, that is really low, this could make simple and efficient follow-up smoke treatment meanwhile the gas after treated could meet the environment protection standard.

7. The most important advantage of lime produced by rotary kiln is stable. Seen from total development trend, our active lime production equipment should focus on local market. Not only for adaptability of manufacturing capacity, but also for adequately utilizing good limestone ore resources, rotary kiln both have better developing future.

Focus on Quality, Serve Worldwide Establish strong sales service system with full coverage for 6 continents, 140 countries. Whatever your requirements, you 'll find the perfect service-oriented solution to match your specific needs with our help.

200tpd lime shaft kiln_kiln machine line_henan yuhong heavy machinery company( yuhong group

200tpd lime shaft kiln_kiln machine line_henan yuhong heavy machinery company( yuhong group

This 200TPDLime Shaft kilnis located in Jiaozuo city Henan Province In China.The company signed a contract with Our Yuhong Company for the supply of Design engineering equipment and technical assistance during the erection and commissioning for the total 200TPD Lime shaft kiln.Thelime shaft kilnis operated using coal power( with coal gasifier) producing 200-230TPD tones of Burnt lime per day with a limestone grading of 40-80mm.

lime shaft kiln_henan yuhong heavy machinery co.,ltd

lime shaft kiln_henan yuhong heavy machinery co.,ltd

Lime shaft kiln, which also called vertical kiln, due to the vertical position of its kiln shell does not rotate, it is known as vertical kiln or shaft kiln. Vertical kiln is always used to produce the products, such as cement, refractory materials (bauxite and mullite), lime, etc. Thus, the commonly used veritical kiln is also known as cement vertical kiln, lime vertical kiln and so on.

There are two main types of shaft kiln: ordinary shaft kiln and mechanical shaft kiln. ordinary shaft kiln is artificial feeding and artificial unloading, or mechanical feeding and artificial unloading; mechanical shaft kiln is mechanical feeding and mechanical unloading. Mechanical shaft kiln has continuous operation, its production quality and labor productivity are higher than ordinary shaft kiln's. With the market development and technological innovation, ordinary shaft kiln has been replaced by mechanized shaft kiln.

With the development and application of rotary kiln, and generally cement shaft kiln can only choose coal as heat source, so application of cement shaft kiln is less and less. Yuhong lime shaft kiln, with its small investments and yield quick returns, and the continuous improvement of the lime shaft kiln technology, it is still widely used in china and foreign areas, such as Southeast Asia area, Central Asia area, the Middle East area and Africa area, etc.

Lime vertical shaft kiln has many forms, the vertical kiln with continuous operation is mostly adopted. Its heating fuel includes coal, nature gas and coal gas. The solid fuel can be added together with the limestone, it can also be burned into gas outside the kiln and then introduced into it. The former is called mixing shaft kiln, the latter is called gas kiln. Mixing shaft kiln has the advantages of large production capacity, fully mechanized procedure, high concentration of kiln gas, high thermal efficiency, good lime quality and so on, so it is often adopted.

Structure of lime kiln equipment is shown below. The kiln shell is formed of ordinary brick or steel plate, its inner is formed of refractory bricks, the thermal insulation material (e.g., asbestos slag, foam diatomite, etc.) is filled between the two layers to reduce heat loss. Air is blowed into the kiln by blower below.

After mixed well, blocks of limestone and coke are put into the kiln above. They do top-down movement and go through three areas: preheating zone, calcining and cooling zone. Preheating zone is located in the upper part of kiln, accounting for 1/4 of the total height, and it uses the hot kiln gas from the calcining zone to preheat and dry the limestone fuel and evaporate the moisture. When the temperature exceeds 70 degrees, furnace burden starts to burn. Hot kiln gas conducts nearly half heat to furnace burden, and its temperature drops to 50-100 degrees, discharged from the kiln crown. Calcining zone is located in the middle of the kiln, accounting for 1/2 of the kiln height. To avoid over-sintering, this zone temperature should not exceed 1200 degrees. Cooling zone is located in the bottom of the kiln, about 1/4 of the total kiln height, its main role is to preheat the air in the kiln to cool the hot lime to 30-60 degrees, not only recycle the heat but also protect the kiln gate from burning-out.

Focus on Quality, Serve Worldwide Establish strong sales service system with full coverage for 6 continents, 140 countries. Whatever your requirements, you 'll find the perfect service-oriented solution to match your specific needs with our help.

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