Tar-type coal water slurry additive prepared from composite raw materials and production technology of tar-type coal water slurry additive

Abstract

The invention discloses a tar-type coal water slurry additive prepared from composite raw materials and a production technology of the tar-type coal water slurry additive.The tar-type coal water slurry additive is synthesized by mixing the main materials such as scrubbing oil, naphthalene oil, anthracene oil and papermaking wastewater in different mass ratios, subjecting a mixture to processes such as sulfonation and condensation, and adding a pore blocking agent carbonate into a synthesized product.The tar-type coal water slurry additive has the advantages that the tar-type coal water slurry additive has the characteristic of general dispersants, namely improvement in coal surface hydrophility; electrostatic repulsion among particles is enhanced, so that improvement in coal slurry fluidity is benefited; since strong stereo-hindrance effect is generated, slurry rheologic stability is achieved; the tar-type coal water slurry additive has specific cooperative synergism characteristic, and accordingly mutually complementary cooperative synergism is achieved; the tar-type coal water slurry additive is good for slurry forming ability of coal types different in coalification degree, is particularly applicable to low-rank coal, and is high in slurry forming concentration and excellent in coal slurry fluidity and stability under the condition that additive coal-based consumption is not more than 1.0%.

Description

Technical field [0001] The invention relates to the field of coal water slurry additives, in particular to a composite raw material preparation tar type coal water slurry additive and a production process. Background technique [0002] Coal water slurry is one of the clean coal technologies that emerged in the 1980s. It is a slurry prepared from coal, water and a small amount of chemical additives with a certain particle size distribution. Coal water slurry products with industrial application value require high concentration, low viscosity, good fluidity and long stability time. In the production process of coal water slurry, coal water slurry additives play a vital role in the performance of coal water slurry. At present, the additives of coal water slurry mainly include lignin series, naphthalene series, humic acid series and non-ionic type. However, these products have their own advantages and disadvantages, and their applications are restricted to varying degrees. For ex...

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Problems solved by technology

Especially for low-rank coal, due to the well-developed surface pores and more water-absorbing groups such as carboxyl and hydroxyl groups, the slurry has a low concentration and poor stability.

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