Product overview

Rotary kilns are widely used in production industries such as building materials, metallurgy, chemical engineering, and environmental protection. By rotating the rotary kiln barrel, solid materials are calcined to achieve physical or chemical treatment processes. This type of equipment is called a rotary kiln. The application of rotary kilns originated from cement production. In 1824, British cement worker J Asp invented the intermittent operation of the earth shaft kiln; In 1883, German inventor Dietrich invented a multi-layer vertical kiln for continuous operation; In 1885, an Englishman, Eransome, invented the rotary kiln and put it into production after the British and American patents were obtained, which soon achieved considerable economic benefits. The invention of rotary kilns led to the rapid development of the cement industry and also promoted research on the application of rotary kilns. Soon, rotary kilns were widely used in many industrial fields and became increasingly important in these productions, becoming the core equipment for corresponding enterprises. In the application field of rotary kilns, the number is mostly in the cement industry.

Application in the Building Materials Industry

Cement rotary kilns are widely used for calcining cement clinker, divided into two categories: dry and wet methods. Lime rotary kiln (also known as active lime kiln) is used to roast active lime and dolomite used in steel plants and ferroalloy plants, while refractory material plants use rotary kilns to roast high alumina vanadium ores.

Application in metallurgical industry

Metallurgical rotary kilns are mainly used for magnetization roasting of poor iron ore in the steel metallurgy industry, as well as roasting of non-ferrous metal ores such as chromium, nickel, iron, and lithium. In non-ferrous and black metallurgy, metals such as nickel, iron, lithium, aluminum, copper, zinc, tin, tungsten, chromium, files, etc. are smelted using rotary kilns to sinter and roast ores, concentrates, intermediates, etc. For example, in aluminum production, it is used to roast aluminum hydroxide into alumina; It is used in ironmaking to produce pellets for blast furnace ironmaking. The foreign "SL/RN method" and "Krupp method" use it for direct reduction of iron ore; The chlorination volatilization roasting method uses it to extract tin and lead, etc. During the beneficiation process, a rotary kiln is used to magnetize and roast the lean iron ore, transforming its weak magnetism into strong magnetism to facilitate magnetic separation.

Application in the chemical industry

Chemical rotary kilns are used for roasting minerals such as aluminum hydroxide, chromite sand, and chromite powder, as well as for oil extraction from oil sands, coal to oil production, and clean coal upgrading. In the chemical industry, rotary kilns are used to produce soda, calcined phosphate fertilizers, barium sulfide, etc. In the 1960s, LapPle and others in the United States invented a new process for producing phosphoric acid using rotary kilns. This method has the advantages of low energy consumption, low electricity consumption, no need for sulfuric acid, and the ability to utilize low-grade phosphate ore. It was quickly promoted, but the phenomenon of ring formation often occurs in the production of rotary kilns, which is mostly cleaned manually by stopping work. However, it affects production and increases production costs. The newly developed rotary kiln ring cleaning machine avoids this phenomenon. Can handle the phenomenon of looping well.

Environmental Protection Industry Applications

The environmental protection industry applies rotary kilns as solid and hazardous waste pyrolysis kilns for the collaborative disposal of sludge and garbage. The application of rotary kilns in the chemical and environmental industries is a new breakthrough in technological creation, making positive contributions to the progress of society and humanity!

Technical Parameter