Composite electric furnace phosphorus slag powder and preparation method thereof

Abstract

The invention which discloses composite electric furnace phosphorus slag powder and a preparation method thereof belongs to the technical field of building materials. The composite electric furnace phosphorus slag powder comprises, by mass, 80-90% of electric furnace phosphorus slag, 5-15% of a grinding activator which is boiling furnace bottom slag, steel slag or molding sand powder, 0.05-0.10% of triethanolamine, 2.0-5.0% of anhydrous sodium sulfate and 1.0-3.0% of modified phosphogypsum, or comprises 75-85% of the electric furnace phosphorus slag, 10-15% of a grinding activator cement clinker, 0.05-1.0% of triethanolamine, 2.0-5.0% of anhydrous sodium sulfate and 2.0-4.0% of the modified phosphogypsum. According to the invention, the electric furnace phosphorus slag is deep developed into the composite electric furnace phosphorus slag powder like water-granulated blast furnace slag powder S75 and S95, the composite electric furnace phosphorus slag powder which can be applied to an admixture of cement and concrete can alleviate situations of coal ash shortage and inferior quality, so 0.2 millions of cement are saved, thereby wastes are really changed into valuables, energy saving and emission reduction are realized, resources are fully used, and social benefits and environmental protection meanings are substantial.

Description

technical field [0001] The invention relates to an electric furnace slag powder and a preparation method thereof, in particular to a composite electric furnace slag powder mainly prepared by using electric furnace phosphate slag, which is used as an admixture for cement and concrete. Background technique [0002] Phosphorus chemical industry is one of the traditional pillar industries in Deyang area, mainly produced in Shifang and Mianzhu. Phosphorus chemical production has two kinds of dry method and wet method, both of which are based on phosphate rock [Ca 5 (PO 4 ) 3 (F, CL, OH)] as raw material. The production of phosphorus chemical products by electric furnace method is called dry method. Its main industrial solid discharge is phosphorus slag, also known as yellow phosphorus slag. The electric furnace method is to crush the phosphate rock and heat it in the electric furnace to over 1300°C. The phosphate rock is in a sintered state, and the P in the ore is oxidized ...

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Problems solved by technology

In the 1980s, the GB / T 6647-2008 national standard "Phosphorus Slag Used in Granulated Electric Furnace Used in Cement" was compiled; the building materials industry standard "Phosphorus Slag Portland Cement" JC / T740; Japan has promulgated the industry standard "Technical Specifications for Phosphorus Slag Powder Mixed with Hydraulic Concrete" DL / T 5387-2007, which is mainly used to replace fly ash for roller compacted concrete construction to solve the problem that some hydropower projects are far away from water and coal ash resources. Due to the difficulty of dam construction, the level of development and utilization is not high, and its chemical activity has not been fully utilized. Therefore, it is generally concluded that the activity of electric furnace phosphate slag is lower than that of water-quenched slag and higher than that of fly ash.

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