Method for adding dispersant dropwise during wet grinding of triple superphosphate

Abstract

The invention discloses a method for adding a dispersant dropwise during the wet grinding of triple superphosphate. In the method, two vertical stirring mills are used for performing serial production, wherein a first stirring mill is used for coarse grinding; a second grinding mill is used for fine grinding; the dispersant may be sodium polyacrylate or a polyacrylic acid, and is adopted according to a pH value of triple superphosphate pulp; when the pulp is neutral, the neutral sodium polyacrylate is adopted; when the pulp is alkaline, the acid polyacrylic acid is adopted; the solid content of the pulp is 75 to 78 percent; and in the pulp, solid minerals may be calcite or limestone. After the dispersant is added dropwise, molecules of the dispersant wrap mineral particles, which reduces cohesiveness among the mineral particles and improves the rheological property and dispersive grinding assistance of the pulp; the dispersant is added dropwise from the upper parts of the stirring mills, so that the pulp overflows more smoothly and smoothly passes through a screen; and the dispersant is added dropwise from the middle parts of the stirring mills, which improves the grindability of the pulp, improves the efficiency of the grinding mills and simultaneously adjusts the pH value of the pulp so as to make the pulp in a stable alkalescent state.

Description

technical field [0001] The invention relates to the production of heavy calcium wet grinding, namely the dropping method of heavy calcium wet grinding dispersant. Background technique [0002] The wet grinding technology of high-mesh mineral powder has been studied abroad in the 1970s. In the grinding slurry, the dripping of dispersant is an important technology of wet powder grinding. Domestic wet grinding, in 2000 It has just started, and domestic grinding equipment is used to produce high-mesh slurry. There is no mature method for adding dispersant, especially D98 ultra-fine slurry calcium. Because the domestic method of adding dispersant is not mastered, the product production is not enough. Come out, the technical quality indicators are not up to standard. Contents of the invention [0003] Aiming at domestic 3600-liter vertical stirring and grinding equipment and calcite-based ore characteristics, in order to produce D98 grade slurry calcium, the present invention p...

AI Technical Summary

Problems solved by technology

[0002] The wet grinding technology of high-mesh mineral powder has been studied abroad in the 1970s. In the grinding slurry, the dripping of dispersant is an important technology of wet powder grinding. Domestic wet grinding, in 2000 It has just started, and domestic grinding equipment is used to produce high-mesh slurry. There is no mature method for adding dispersant, especially D98 ultra-fine slurry calcium. Because the domestic method of adding dispersant is not mastered, the product production is not enough. out, the technical quality indicators are not up to standard