Effect of compound inorganic nano-stabilizer on the stability of high concentration coal water mixtures

In this paper, two kinds of inorganic nanoparticles based on different manufacturing processes were used as stabilizers of coal water mixtures (CWMs). The size and shape of nano-stabilizers and their steady mechanisms were explained by study of TEM and zeta potential. The properties, zeta potential, rheology and the stationary stability of coal water mixtures made up nano-stabilizers and different coal samples were investigated. In order to achieve static repulsion and steric hindrance effects simultaneously, based on the weight proportion, two nano-stabilizers were compounded. Experiments have proved that the compound inorganic nano-stabilizer has an advantage over conventional stabilizer, such as carboxymethyl cellulose sodium salt (CMC–Na), and it can be developed as a new type of stabilizer.