Steel slag masonry cement and preparation method thereof

Abstract

The invention discloses steel slag masonry cement prepared from steel slag containing vanadium and a preparation method of the steel slag masonry cement, belonging to the technical field of building materials. The steel slag masonry cement is prepared by mixing 20-50 weight parts of cement clinker, 15-40 weight parts of power plant furnace slag, 3-15 weight parts of additive and 30-60 weight parts of steel slag containing vanadium, wherein metered by weight percentage, the content of free calcium oxide in the steel slag containing vanadium is lower than or equal to 3 percent; and the additivecomprises the following components in percentage by weight: 50-100 percent of gypsum, 0-10 percent of triethanolamine and 0-50 percent of anhydrous sodium sulphate. According to the invention, the cement prepared from the steel slag containing vanadium and the power plant furnace slag can meet the requirement on the cement performance in 'Steel Slag Masonry Cement' (JC / T 1090-2008) by controllingthe content of the free calcium oxide in the steel slag containing vanadium, the specific surface area of the steel slag containing vanadium and the mixing proportion of the steel slag containing vanadium to the power plant furnace slag to the additive.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a steel slag masonry cement and a preparation method of the cement. Background technique [0002] At present, when iron and steel plants use vanadium-titanium magnetite for smelting, in order to recover vanadium as much as possible, they generally adopt the principle of selective reduction and adopt low-temperature, low-silicon, and low-titanium smelting methods; Some heat compensation technologies and adding a large amount of lime and dolomite make the free calcium oxide and free magnesium oxide in the slag higher, and finally make the steel slag have a higher CaO content, SiO 2 The characteristics of low content and high RO phase content, this kind of steel slag is called vanadium-containing steel slag. Vanadium-containing steel slag is composed of 35-45% CaO and SiO 2 10-15%, MgO 9-14%, Al 2 o 3 2 to 5%, Fe 2 o 3 20~35%, V 2 o 5 0.5~3.0%, P 2 o ...

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Problems solved by technology

Second, due to the special high-temperature performance of vanadium-containing steel slag, its activity is poor. When it is used as admixture to produce cement, the strength of cement will be greatly reduced.

The third is due to the vanadium-containing steel slag C 2 S, C 3 The content of S is significantly lower than that of steel slag with the same alkalinity, and at the same time, vanadium-containing steel slag contains 0.5-3.0% V 2 o 5 Reacts with CaO to form calcium vanadate, which reacts with C 2 S, C 3 S forms a solid solution, further reducing the C 2 S, C 3 The amount of S, so that the hydration performance of vanadium-containing steel slag is low

The publication number is CN1844026A, and the Chinese patent titled a new type of masonry cement discloses a kind of masonry cement prepared from steel slag and other industrial waste, but the steel slag is not the vanadium-containing steel slag obtained by smelting vanadium-titanium magnetite , steel slag is not used as the main raw material, and the patent does not mention the use of power plant slag as a raw material for steel slag masonry cement

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