Displaying items by tag: Kiln

US: California-based Heliogen has developed concentrated solar-thermal plants (CSPs) with the ability to focus sunlight to generate temperatures over 1000°C by micro-adjusting mirrors using computer technology. It has now engaged Parsons Corporation to build arrays of its CSPs for installation in cement pre-calciners. Requiring 900°C heat, these represent the largest part of the industry’s CO₂ output. The technology will firstly reduce this by replacing fossil fuels with a clean heat source, which moreover entirely bypasses the electrical grid. Heliogen CEO Bill Gross says that the installations will make carbon capture and storage (CCS) of the remaining CO₂ emissions from the conversion of limestone to lime easier by removing other pollutants. Heliogen is now targeting 1500°C from its CSPs, which would enable them to supersede cement fuels in kilns.

Russia: Vostokcement subsidiary Spasskcement received a ninth belt to serve as a back-up for conveying materials into one of its two kilns at its Spasskcement plant. The belt is 7.65m wide and was manufactured in Louyang, China.

Cuba: Following 18 months of reduced operations in which time maintenance and repairs on its grey cement kilns were carried out, Corporacion Cementos Cubanos’ 0.7Mt/yr Siguaney plant is once more fully operational across its four wet lines. Esmerk has reported that the company hopes to re-open its white cement kiln at the nearest possible date.

Algeria/Iraq: Dal Machinery & Design (DMD), part of Turkey’s Dal Engineering Group, has been awarded a contract to supply a kiln shell to LafargeHolcim Algeria’s Oggaz cement plant. The shell has an internal diameter of 5mm. The shell will be manufactured from a single part, with one single welding in the axial direction. It is expected to be delivered by September 2019. No value for the order has been disclosed.

Other recent orders for DMD include the supply of two kiln shells for LafargeHolcim’s Bazian cement plant at Sulaimani in the Kurdistan region of Iraq. The kiln shells were manufactured with a diameter of 5.2m. Delivery was made at the beginning of March 2019. DMD’s other kiln shell clients in Iraq included the Gasin cement plant in 2018. It also supplied a mill tunnion to LafargeHolcim’s Kerbala cement plant.

Austria: Unitherm Cemcon has launched the MAS DT rotary kiln burner, a new product in its Mono Airduct System (MAS) product line. The new burner is already in operation at six cement plants in Austria, Germany and France.

The new design uses a more efficient primary air injection, resulting in higher effective momentum and optimised combustion. Placing the adjustable primary air openings directly at the burner tip leads to unobstructed injection of the air jets into the kiln. With minimum losses at the air nozzles, the entrainment of secondary air is improved by approximately 15%.

The new primary air system, with discs instead of flexible hoses, requires less space inside the primary air channel. Therefore, the burner is smaller in diameter and lighter in weight, which reduces investment costs. Unitherm Cemcon says that the cooling of the outer jacket tube with the MAS system (hose and disc design) is superior to that of other rotary kiln burners, as 100% of the primary air is used for cooling. With the new disc system, the cooling of the burner tip is improved even further. The producer added that all new MAS DT burners showed improved lifetime of the refractory lining at the burner. On average the refractory lifetime is extended by approximately 20%.

Uzbekistan: Akhangarancement, part of Russia’s Eurocement, has installed a new Wikov gearbox on the rotary kiln at its plant in Akhangaransky as part of a US$1.5m upgrade project. Other work included upgrades to the clinker conveyors, the sludge line, the cooler, the heat exchanger and other equipment. A new production line is currently being built at the 2Mt/yr plant. It is scheduled for commissioning in 2020.

Chile: FCT Combustion has been awarded a kiln conversion project by an unnamed cement company. The project is a conversion of an existing direct-fired rotary kiln into a state of the art indirect-fired kiln using pulverised coal. Delivery for material is scheduled by April 2019 and for it to be commissioned by October 2019.

FCT is responsible for the complete engineering and procurement supply, including the following main equipment: coal bag filter; process ID fan; fire and explosion detection and suppression; coal dosing; multi fuel burner for coal, natural gas and fuel oil; motorised burner trolley; coal pneumatic conveying; primary air fan; emergency cooling; automatic ignition; flame monitoring; and fuel oil pumps and valve train. The project targets are low NOx emissions, better kiln operation and stability and improved fuel consumption.

UK: Finland’s Metso has acquired Kiln Flame Systems (KFS), a UK-based combustion solutions and technology provide, to extend its pyro-processing portfolio and capabilities. KFS specialises in rotary kiln and calcining processes, combustion optimisation and burner technologies with patented designs. It provides solutions to a wide range of industries including minerals processing. KFS has 14 employees based in High Wycombe, Buckinghamshire. KFS will become part of Metso's Minerals Services business area, which offers a comprehensive line of pyro processing equipment.

"Joining forces with Metso gives us the opportunity to offer our technology to a wider customer base. KFS has worked hard to establish our position and reputation as a market leader in custom-designed combustion solutions, and we are delighted to build our future and continue serving existing and new customers with Metso," said Cliff Rennie, director and chief executive officer (CEO) of KFS.

KFS was founded in 1999. It uses computational fluid dynamics (CFD) for burner design and system analysis supported by physical modelling.

UK: Cemex is planning to restart commercial production on the second kiln at its South Ferriby cement plant in November 2018. The company says that this investment highlights its confidence in the long-term potential of the UK building materials market.

The kiln has a capacity of 1000t/day and was originally installed in 1973. Since then the cement producer has conducted upgrade work on the production line to comply with environmental legislation and to install new electrical infrastructure, a control system and instrumentation. The second kiln was previously the first Cemex line in the world to achieve a 100% alternative fuel substitution rate in 2011. Once fully operational both kilns at the plant will give it a production capacity of 0.7Mt/yr.

Georgia: HeidelbergCement Georgia plans to close a kiln at its Rustavi cement plant due to imports from Iran. It will also reduce production at the Dedoplitskaro limestone quarry, according to GBC Daily News. The Georgian Cement Association has lobbied the government to enact anti-dumping measures against Iranian imports.