1. Cement Rotary Kiln Introduction

Rotary kiln is rotary forging kiln for short, which is one of building material equipment. It is divided into cement kiln, metallurgy and chemical kiln and lime kiln as per the different material treatment. Cement kiln is applied to carline cement clinker, which has two types,dry-type cement production kiln and wet-type cement production kiln. Metallurgy and chemical kiln is mainly used to magnetizing roast lean iron ore, oxidation roast the nickel chromium iron ore in the steel and iron plant. It is also used to roast bauxite chamotte in the refactory plant and chamotte, aluminium hydroxide in alumimium plant,crome ore in the Chemical plant. Lime kiln is use to roast active lime and soft-burned dolomite in steel plant and iron alloy plant.The cement kiln burns rawmix to produce clinker, which is then ground to make cement.

The cement kiln is the heart of the cement making process: this is today almost a cliché, but was not always quite so true. In the modern cement plant, the kiln is the most expensive and technically complex part of the plant, and because it must be run all the time (unlike other sections of the plant) it effectively defines the output capacity of the plant. It stands out also in that, unlike the other processes involved, the “pyroprocessing” stage of cement manufacture is absolutely unique to the industry, and has devoted to it a complex and specialized multi-disciplinary technology all its own.

Because of this, the cement kiln scarcely needs to be considered under the general category of “kilns”. In addition to its uniqueness, it also stands out among pyroprocessing equipment as by far the most economically significant world-wide. The blast furnace for iron production produces less than half the tonnage produced by cement kilns, although it runs ahead in terms of fuel usage. In terms of CO2 production, Portland cement kilns – when using limestone as a raw material – are by far the largest industrial manufacturing source. The taming of these emissions is likely to further increase the sophistication of the kiln design.

2. Cement Rotary Kiln Features

Rotary kiln is originally and widely applied to cement production, which is called the heart of cement plant. In the production of building material, Rotary kiln is used to calcine clay lime stone and cement clinker. In the production of refractory material, the kiln is used to calcine the material to extend of stable dimension, enough strength for machine-shaping.

Rotary kiln is rotary forging kiln for short, which is one of building material equipment. It is divided into cement kiln, metallurgy and chemical kiln and lime kiln as per the different material treatment. Cement kiln is applied to carline cement clinker, which has two types, dry-type cement production kiln and wet-type cement production kiln. Metallurgy and chemical kiln is mainly used to magnetizing roast lean iron ore, oxidation roast the nickel chromium iron ore in the steel and iron plant. It is also used to roast bauxite chamotte in the refactory plant and chamotte, aluminium hydroxide in alumimium plant,crome ore in the Chemical plant. Lime kiln is use to roast active lime and soft-burned dolomite in steel plant and iron alloy plant

Rotary kiln is one branch of rotary kiln system adopted in the steel and iron pellet with the extinguish design and structure. It is mainly composed of rotary parts, support parts, conveying parts, kiln head cover, kiln head and tail seal, combustion device. The ore, concentrate is sintered and calcined through rotary kiln. For example, aluminum hydroxide is calcined into alumina by the kiln in the aluminum production; Pellet ore for blast furnace is produced in the kiln in iron manufacturing. Iron ore is reduced directly through SL/RN process or Krupp process; Tin and lead can be refined through the kiln by chloridizing volatilization method .