摘要:
The present invention is directed to a process of making fired mineral pellets by mixing particulate mineral material with moisture and binder comprising substantially water soluble organic polymer to form a moist pelletizable mix, pelletizing the moist mix by a tumbling process to form green pellets and firing the green pellets, characterized in that the binder comprises alkali metal silicate in a dry weight amount which is either (a) above 0.13% based on moist mix or (b) above 0.08% based on moist mix and at least three times the dry weight of substantially water soluble organic polymer.
摘要:
A process for particulate agglomeration (i.e., pelletizing) and the product produced (i.e., pellets) by such processes are disclosed. The process generally comprises a process of agglomerating particulate material, said process comprising commingling said particulate material with a moistening effective amount of water, a binding effective amount of polymer and a binding effective amount of weak acid to produce a mixture and forming said mixture into agglomerates.
摘要:
Briquettes for the liquefaction of metallurgical slag are formed from a mixture containing, by weight, 85-98% slag from secondary aluminium processing, 1 to 8% polyvinyl acetate dispersion as the polymeric bonding agent and the remainder water, the briquettes containing water in the form of residue humidity at a quantity of maximally 1.5%, ideally no more than 0.5%, in relation to the overall weight of the briquettes, and the briquettes have a specific weight of 1,500-5,000 kg.m−3 and a compression strength of at least 20 MPa. Ideally, the mixture contains 90-92% slag from secondary aluminium processing, 1 to 3% polyvinyl acetate dispersion and the remainder water. The mixture may also contain 0.5-2% unsaturated acid, selected from the group containing oleic acid and/or palmitic acid and/or stearic acid, as a hydrophobic ingredient. The ideal shape of the briquettes is cylindrical.
摘要:
A method of producing raw material pellets, including forming pellets from a mixture of an iron oxide powder, a coal powder and a binder material after adding adjusting water to the mixture, and drying the pellets, wherein the binder material comprises at least one of tar and at least one of carboxymethylcellulose and polyvinylalcohol.