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Production method of nickel slag composite portland cement

A composite silicate and production method technology, which is applied in the field of inorganic non-metallic materials, can solve the problems of large land occupation and environmental pollution, and achieve the effects of improving strength, considerable economic benefits, and reducing liquid phase viscosity

Inactive Publication Date: 2013-06-12
INNER MONGOLIA BAOTOU STEEL UNION
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Problems solved by technology

According to relevant materials, Jinchuan Group alone discharges nearly 800,000 tons of nickel slag every year, and it is increasing year by year. If such a large amount of nickel-iron slag is not treated and recycled, it will not only occupy a large amount of land, but also It will cause environmental pollution, so it is necessary to recycle ferronickel slag and turn waste into treasure

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  • Production method of nickel slag composite portland cement
  • Production method of nickel slag composite portland cement

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Embodiment Construction

[0019] According to the actual background and composite silicate production technology, the present invention proposes a novel method for preparing composite cement, using limestone, coal ash and ferronickel slag to prepare cement clinker, a certain amount of ferronickel slag as admixture, and an appropriate amount of Gypsum is used as a raw material for composite Portland cement.

[0020] According to the research on nickel slag instead of iron powder in cement clinker, it is shown that nickel slag contains a small amount of metal ions, such as Ni, Cu, Co and other elements, which play a positive role in reducing the minimum eutectic point temperature and liquid viscosity of clinker. It can improve the burnability of raw meal, so it is very beneficial to the formation of clinker minerals.

[0021] The nickel slag quenched by water quenching, because its glass phase contains a small amount of CaO, Al 2 o 3 , so in alkaline media (such as the hydration product Ca(OH) of Portl...

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Abstract

The invention discloses a production method of nickel slag composite portland cement. The production method comprises the following steps of: preparing cement clinker ingredients in proportion, and roasting the prepared cement clinker ingredients into cement clinker, wherein the cement clinker ingredients include 83-87wt% of limestone, 7-9wt% of coal ash and 8-12wt% of nickel slag; and respectively grinding the cement clinker, plaster and nickel slag, and mixing in proportion to form a cement product, wherein the cement product comprises 70-75wt% of cement clinker, 2.5-3.5wt% of plaster and 22-25wt% of nickel slag powder. According to the technical scheme, the production method has a positive effect of reducing the lowest liquid phase eutectic point and liquid phase viscosity of clinker, and is capable of improving burnability of raw materials, thereby being very beneficial to formation of clinker mineral.

Description

technical field [0001] The invention relates to the field of inorganic non-metallic materials, in particular to a production method of nickel slag composite portland cement. Background technique [0002] As an alloying element, nickel metal is widely used in iron and steel materials and other high-tech composite materials, and the market demand and value are increasing year by year. Therefore, in the 21st century, many enterprises for smelting nickel and iron have been established in my country, and the number and Production is also increasing. At present, nickel smelting methods are mainly divided into two types: dry method and wet method. The production of nickel in my country mainly adopts pyrometallurgy of nickel sulfide ore, and the production processes adopted include electric furnace smelting, flash furnace smelting and blast furnace smelting. Among them, the flash furnace smelting process is relatively advanced. my country's Gansu Jinchuan Group has the largest nickel...

Claims

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Application Information

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IPC IPC(8): C04B7/21
CPCY02P40/143Y02P40/10
Inventor 宿成董方刘金刘南姜晓丽高东辉
Owner INNER MONGOLIA BAOTOU STEEL UNION
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