Vertical mill slag grinding aid and preparation method thereof

Abstract

The invention discloses a vertical mill slag grinding aid and a preparation method thereof. The slag grinding aid comprises the following components in percentage by weight: 5 to 40% of polyol amine, 10 to 60% of polymeric polyol, 5 to 40% of polyol, 3 to 20% of inorganic salts, and the balance being water. The provided preparation method is suitable for the production of vertical mill slag grinding aid. The slag yield is increased by 5 to 20%. The activity indexes of slag are increased to different degrees. The fineness (residue on sieve) and specific surface area of mineral powder are prominently improved, and the performance of cement is not influenced. The preparation method can improve the fluidity of mineral powder, thus reduces the phenomenon of over grinding, improves the powder selecting efficiency, and prominently increases the content of fine particles with a size less than 32 [mu]m. The provided preparation method improves the grinding efficiency of grinding machine, reduces the wear degree of grinding machine, thus reduces the maintenance cost and production cost, and has a high performance / cost ratio. Moreover, the production technology and equipment are simple and practical.

Description

technical field [0001] The invention relates to the field of slag manufacture, and more specifically relates to a vertical mill slag grinding aid and a preparation method thereof. Background technique [0002] As a material with good activity, slag has been widely used in cement and concrete. The slag contains crystals and glass bodies. The former belongs to the inert component and the latter belongs to the active component. The better it is, but the grindability is relatively poorer, so whether it is ball milling or vertical milling alone, the energy consumption is higher. In actual industrial production, the grinding effect of slag can be improved by two methods: one is Improve the existing equipment, but its investment and maintenance costs are high; the other is to add grinding aids to the slag grinding, which is characterized by not requiring too much investment, and can increase the grinding fineness and improve the physical and chemical properties , Reduce the surfac...

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Problems solved by technology

[0003] At present, there are many types of special grinding aids for slag on the market, but they are all improved or directly used for traditional grinding aids. This type of grinding aids is aimed at ball mills, and for vertical mills, the residence time of materials is only one-fifth of ball mills. , after using this kind of grinding aid, the stability of yield and activity improvement is insufficient

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