Grinding additive for powder-grinding steel slag in vertical mill

Abstract

The invention discloses a grinding additive for powder-grinding steel slag in a vertical mill. The grinding additive is prepared from the following raw materials in percentage by weight: 1-5 percent of polyacrylic acid, 5-10 percent of molasses, 1-5 percent of sodium hexametaphosphate, 2-6 percent of tetraethylammonium oxalic acid, 3-10 percent of triethanolamine, 5-20 percent of aluminum sulfate and 46-81 percent of carriers. All components of the grinding additive are cooperated with each other, so that the grinding efficiency of the steel slag in the vertical mill is improved, the active indexes are improved, and the adverse effect on cement and concrete performance is avoided. Compared with the prior art, the grinding additive for grinding steel slag in the vertical mill has the advantages that a material layer can be stabilized, the yield of the mill is increased, and the active indexes of the high steel slag powder 7d and 28d can also be increased.

Description

technical field [0001] The invention relates to a grinding aid for grinding steel slag, in particular to a grinding aid for grinding steel slag in a vertical mill. Background technique [0002] Vertical mill, also known as roller mill, uses the relative motion of the grinding roller and the grinding disc to generate a speed difference to form sliding and shearing grinding forces to achieve the effect of crushing and rolling the materials on the grinding disc. The motor drives the grinding disc to rotate through the reducer, and the centrifugal force generated by the rotation of the grinding disc moves the material fed into the center of the grinding disc to the periphery of the grinding disc and enters the roller table between the grinding roller and the grinding disc. The grinding roller exerts pressure on the material in the roller table under the action of the hydraulic device and the pressurizing mechanism. After the material is rolled in the roller table, it moves to t...

AI Technical Summary

Problems solved by technology

The grinding effect of traditional grinding aids has a great relationship with the contact time between materials and grinding aids. When grinding in vertical mills, the residence time of materials is short, the contact time with grinding aids is short, and the inert components in steel slag It is a solid solution with high iron content, and the active component is similar to the cement active substance. The two components grow together, making it difficult to grind the steel slag particles to the effective hydration particle size. The activity of the steel slag is low, so the traditional grinding aid is not suitable for vertical grinding powder. Grinding steel slag process