Cement & Concrete
The REFRAJET® Addmix technology is an innovative injection system that was developed specifically for the installation of cement-free sol-gel bonded refractory concretes of the REFRAJET® Nanobond type.
The injection system creates a reactive aerosol that is injected centrally into the continuous flow of dry gunning mix material. A liquid binder can be added to the pre-wetted dry material via a conventional nozzle system at the end of the deliver hose.
Pre-wetting of the dry gunning mix offers several advantages, such as reduced dust generation at the gunning nozzle, less material rebound – particularly during overhead work – plus enhanced bonding to refractory surfaces.
Moreover, the concrete's cold crushing strength and cold modulus of rupture are increased, porosity is reduced, and a denser concrete structure is obtained.
The process has been optimized for cement-free shotcretes of the REFRAJET® Nanobond type, but it can also be used for many other concretes from Refratechnik's product range.
Cement companies in India, the world second biggest market, are wary about short-term prospects for demand and may not rush to restart plants if the federal government begins lifting its lockdown from 15 April.
Rising cement prices in several Chinese regions signal that the recovery in the sector is picking up pace, which could boost coal demand with the industry being a large-scale consumer.
A nationwide lockdown in India is prompting cement producers to seek deferments on the loading of cargoes of petroleum coke, which they use as a fuel for production. These high-sulphur coke cargoes were due for loading from refineries in the US and Saudi Arabia.
Iran exported over 57 million tons of mineral products worth over $9.2 billion during the last fiscal year (ended March 20, 2019), registering 5% and 2 % fall in tonnage and value respectively.
Following significant downfall in domestic sponge prices, export offers have also went down by USD 5-10/MT and by USD 10-15/MT in a week's duration.
In the February issue of International Cement Review, Buzzi Unicem reviews its cooperation with Fives in the development of the FCB Horomill® technology.