Preview

Limestone calcination in a rotary kiln

Satisfactory Essays
Open Document
Open Document
422 Words
Grammar
Grammar
Plagiarism
Plagiarism
Writing
Writing
Score
Score
Limestone calcination in a rotary kiln
This calcinations technology has low energy consumption and high output, and after dehydration and decarburization and whitening, the products have stable performance and can be used in such industrial fields as paper making and coating.Commonly known as rotary kiln, it is also called rotary dryer, belonging to construction equipment. Depending on the materials, the rotary kiln falls into three types: clinker rotary kiln, limestone rotary kiln and cement rotary kiln.

An experimental study of the calcination of limestone has been carried out in a highly instrumented pilot-scale rotary kiln. Local gas, solids, and wall temperatures and pct calcination have been measured under a range of operating conditions to determine the influence of limestone type, feed rate, rotational speed, inclination angle, and particle size on calcination and heat flow in the kiln. Thus, it has been found that the local calcination is dependent primarily on the solids temperature and hence on heat transfer. Of the variables studied, the limestone feed rate has the strongest effect on the temperature and calcination fields, whereas inclination angle and rotational speed are relatively less important. The different limestones studied exhibited significant differences in heat-absorption capacity and calcination temperature which may be related to their radiative properties. Increasing particle size over a range of 0.75 to 3.5 mm resulted in an increase in both heat transfer to the bed and calcination.

Working Principle of the Limestone Rotary Kiln
The materials to be burnt get into the stove from the higher end of the cylinder. Due to the slope and slow rotation of the cylinder, the material moves around from top to bottom along the axis to finish its process. At last, the finished materials get into the cooler through the burner hood. The fuel gets into the kiln through the head of the kiln. The waste gas will be discharged from the end of the kiln after exchanging heat with the

You May Also Find These Documents Helpful

  • Better Essays

    6. "Ceramic Arts Daily- Wood Kiln Firing Techniques and Tips." Ceramic Arts Daily RSS. N.p., n.d. Web. 12 Mar. 2013.…

    • 2307 Words
    • 10 Pages
    Better Essays
  • Good Essays

    The first phase, called oxidizing, turned both the vessel and the slip red and the kiln was heated to 800°C, while during the 2nd phase, called reducing, the lack of oxygen (due to the potter closing the vents and raising the temperature to 950˚C) would turn both the vessel and slip black. In the last phase, the vessels coarser material reabsorbed the oxygen (the potter opened the vents) and would turn red again, while the slip would remain black.…

    • 1243 Words
    • 5 Pages
    Good Essays
  • Good Essays

    The purpose of this lab experiment was to test which area of three designated areas in a Bunsen Burner flame would have the highest temperature. The first position was the tip of the blue outer flame, the second position being the tip of the inner cone, and the last position being half way down the inner flame. Through the courses of the experiment, data collected showed that Position A was the hottest of the three. The highest average temperature of the flame in effects to a beaker of water was 36.0°C as compared to 34.9°C and 30.8°C. Based on the data, it is concluded that Position A is the hottest.…

    • 694 Words
    • 3 Pages
    Good Essays
  • Powerful Essays

    Bunsen Burn Lab

    • 2580 Words
    • 11 Pages

    The Bunsen burner should be lit by striking the match first, turning on the gas, igniting the gas, and adjusting the flame using the gas flow valve, the collar, and the table gas release to achieve a blue flame. I predict that the hottest part of the Bunsen burner flame is the tip of the flame. The gas burning is a chemical change. It is exothermic.…

    • 2580 Words
    • 11 Pages
    Powerful Essays
  • Good Essays

    Heat Of Combustion Lab

    • 541 Words
    • 3 Pages

    We also need to understand the specifics of combustion, which is the chemical process of burning specific compounds and other items, and the specific heat capacity - the amount of thermal energy needed to increase the temperature of a given substance. Furthermore, determining the heat of combustion to compare to the values of other hydrocarbons - elements made entirely out of hydrogen and carbon - is very useful for the reasons listed above. As we know, the measurement of the quantity of heat exchanged of any type of thermal energy released is known as calorimetry - an entirely different science than we are used to. We are using each of these concepts throughout the lab experiment and are continuing to further our knowledge of each as…

    • 541 Words
    • 3 Pages
    Good Essays
  • Good Essays

    Alternative Job Shadow Report An occupational therapist has many options when it comes to areas of practice. One venue, that I could potentially work in, that sparks my interest, is mental health. Someone who is struggling with mental health is in a very vulnerable position and I think my disposition would be beneficial in this setting. I have struggled with depression myself and I realize how important an empathetic listener can be.…

    • 1805 Words
    • 8 Pages
    Good Essays
  • Good Essays

    AIM: To carry out a lab experiment to decompose a carbonate using heat, also to carry out appropriate tests for the formation of products as a result of this decomposition.…

    • 620 Words
    • 4 Pages
    Good Essays
  • Good Essays

    To school, or not to school; that is the question. At least it was for me four months ago as I was looking for a leg up in this economy. Having a high school diploma and a can do attitude no longer opens doors in the working world. Now days, having at least your Associates degree and 2 yrs of experience are required before employers will even look at your resume. Since I already had the experience, school seemed like the best option to help me find an employment if the lay off rumors at my current job were true. Though it was the best option, my up coming wedding, thoughts of starting a family and finding the money were a few challenges that could keep me from completing my business administration program.…

    • 703 Words
    • 3 Pages
    Good Essays
  • Good Essays

    Shisha Informative Speech

    • 806 Words
    • 4 Pages

    D. Usually, charcoal is used to heat tobacco, then the smoke flows through water, rubber hose and lastly to a mouthpiece.…

    • 806 Words
    • 4 Pages
    Good Essays
  • Good Essays

    So in wood combustion we observe solid wood disappear and be converted to gas products, leaving only some ashes. These are formed by minor components of wood that cannot burn and remain solid.…

    • 388 Words
    • 2 Pages
    Good Essays
  • Satisfactory Essays

    CEMEX: Rewarding the Egyptian Retailers - R.Sathyanarayanan S Santhosh Kumar Shriram V Mohan Prasanth Subramaniam Goutham Raju To extend its global presence, CEMEX entered the Egypt market through acquisition of Assiut Cement Company CEMEX – Company background • CEMEX was founded in 1906 under the name Cementos Hidalgo • Purchased Mexican Cement producers and expanded into petrochemicals and tourism • Initially it was a domestic firm with 90% of revenues from Mexico • In 1992, it began international expansion and by 2003 more than 65% of its sales came from outside Mexico CEMEX’s global presence Acquisition of Assiut Cement •…

    • 1106 Words
    • 13 Pages
    Satisfactory Essays
  • Good Essays

    Chapter 6 of Ceramics: A Potter’s Handbook is focused on hand building techniques in ceramics. This section goes through various methods of hand building such as coils, slabs, and molds. This ranges from small to large sculptures and works. These techniques have been in use with potters for thousands of years, in various cultures.…

    • 848 Words
    • 4 Pages
    Good Essays
  • Satisfactory Essays

    Ancient Siege Weapons

    • 338 Words
    • 2 Pages

    2. To release it fuel you had to pump air into the pot storing energy as pressure once the oil is nice and hot and once an enemy ship is in range the valve is opened the pressure make the oil go through the valve and towards the nozzle that narrows. Once out a match/lamp ignites the fuel/oil and fire flame and burning fuel towards the enemy ship/army.…

    • 338 Words
    • 2 Pages
    Satisfactory Essays
  • Good Essays

    Accountability is a situation in which people who exercise authority are controlled by external means and internal norms Medical ethics the amount to which a person is accountable to a superior authority. (1) A condition in which individuals who exercise power are constrained by external means and internal norms. (2) Taking responsibility for one’s own actions and defending them to anyone who asks (McGraw-Hill, 2002).…

    • 463 Words
    • 2 Pages
    Good Essays
  • Good Essays

    Combuston Research

    • 645 Words
    • 3 Pages

    The temperature in the place can have chance of rising until the ignition temperature has been reached for the fuel (every fuel has different temperature). When the max temperature has been reached the fuel burns itself spontaneously. This occurs during the heating of fuels like oil, kerosene or etc in stove and heating appliances.…

    • 645 Words
    • 3 Pages
    Good Essays