What is vertical kiln?

What is vertical kiln?

The vertical shaft kiln, or vertical kiln, is a type of clinker calcination equipment used in small and medium-sized cement plants. It can complete the comprehensive mechanized operation of feeding, calcining, crushing and discharging.

How does a vertical kiln work?

In the vertical kiln, the material moves from top to bottom, and the combustion air moves from bottom to top. The heat carried by the high-temperature materials preheats the combustion air. The heat consumption of clinker in modern shaft kiln can be controlled within (600 ~ 700) × 4.18kj.

What is shaft kiln?

Shaft kilns can burn stone from a minimum of 20mm diameter up to 175mm. This type of kiln tends to produce medium reactivity quicklime, which can then be used in a number of industrial processes including the manufacture of iron and steel and aerated concrete blocks.

What is cement rotary kiln?

A rotary kiln is a physically large process unit used in cement production where limestone is decomposed into calcium oxide which forms the basis of cement clinker particles under high temperatures.

What are the two types of kiln used to produce lime?

Types of kiln Permanent lime kilns fall into two broad categories: “flare kilns” also known as “intermittent” or “periodic” kilns; and “draw kilns” also known as “perpetual” or “running” kilns.

What fuel is used in cement kilns?

Using a mix of 50% hydrogen and 50% biomass in the kiln and 83.3% biomass with 16.7% plasma in the Calciner leads to total elimination of all fossil fuel CO2, leaving only process CO2 from the breakdown of raw materials and CO2 from biomass fuels (considered to be CO2 neutral).

How does cement kiln work?

In a typical cement kiln some 200 tonnes per hour of sintering material passes the burner(s). The ashes of the fuel used to heat the kiln drops into the glowing material and reacts with the hot minerals to become an integral part of the end-product – clinker. This clinker is then ground into cement.

Why is lime burned?

Lime burning produces quicklime/calcium oxide (CaO) and carbon dioxide (CO2) which escapes into the environment. This reaction takes places at temperatures above 700°C. Quicklime is highly reactive and in contact with water it changes into slaked lime/ calcium hydroxide (Ca(OH)2).

What is the formula of lime kiln?

A lime kiln is a kiln used to produce quicklime by the calcination of limestone (calcium carbonate). The chemical equation for this reaction is: CaCO3 + heat → CaO + CO. Limestone is poured into one side of the kiln, it is then heated up with hot air and quicklime [Calcium Oxide] comes out the other end.

What kind of kiln is vertical shaft kiln?

Shaft kiln, also called vertical shaft kiln or vertical kiln, is a kind of vertical set stationary cement kiln, usually applied in the cement production line, lime production line, etc.

What kind of kiln is used in cement plant?

Shaft kiln is a necessary type of cement kiln in the cement production. As we all know, VSK cement plant is widely applied in the cement industry. Generally, cement vertical kiln can be divided into two types, ordinary shaft kiln and machinery shaft kiln. The mini cement plant uses mechanical shaft kiln.

Where is the cooling zone in a shaft kiln?

The cooling zone is located between the calcining zone and the kiln bottom. In this area, the clinker exchanges heat with the cold air blown from kiln bottom so as to cool down the clinker temperature, meanwhile, the cold air is heated and then enters the calcining zone as an oxidizingair.

What kind of kiln does AGICO cement use?

AGICO, as an experienced cement manufacturer, has been in the cement industry for almost 20 years. We are specialized in manufacturing cement mill, cement rotary kiln and some other cement equipment, with superior quality and high capacity.

What is vertical kiln? The vertical shaft kiln, or vertical kiln, is a type of clinker calcination equipment used in small and medium-sized cement plants. It can complete the comprehensive mechanized operation of feeding, calcining, crushing and discharging. How does a vertical kiln work? In the vertical kiln, the material moves from top to bottom,…