Nickel iron slag micropowder and preparation method thereof

A technology for ferronickel slag and micropowder, which is applied in the field of ferronickel slag micropowder and its preparation, can solve the problems of undisclosed micronization treatment of ferronickel slag, and achieve the effects of excellent crystallinity, advanced technology and good activity index.

Inactive Publication Date: 2014-05-07
SHANDONG WEIYE NEW BUILDING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Because ferronickel slag, especially ferronickel slag occupies a significant proportion in solid waste residue, how to make full use of ferronickel slag and turn waste into treasure is a major problem faced by the industrial field; and the prior art does not disclose ferronickel slag Report on micronization treatment of slag

Method used

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  • Nickel iron slag micropowder and preparation method thereof
  • Nickel iron slag micropowder and preparation method thereof
  • Nickel iron slag micropowder and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0037] The present invention provides that the specific surface area is respectively 359.9m 2 / kg, 417.5m 2 / kg, 482.3m 2 / kg, 547.6m 2 / kg of ferronickel slag powder.

[0038] The preparation method of above ferronickel slag fine powder:

[0039] a. Send the ferronickel slag to the iron remover for magnetic separation;

[0040] b. Dry the ferronickel slag after magnetic separation until the water content of the ferronickel slag is less than or equal to 3%, pulverize it, and collect coarse material with a particle size less than 10 mm;

[0041] c. Weigh the coarse material of the prescribed amount, send it into the mill, the rotating speed of the mill is 27.8r / min, carry out grinding, drying, the drying temperature is 500 ℃, cool down, and the grinding temperature is 80 ℃, the ferronickel slag fine powder is obtained;

[0042] d. Send the ferronickel slag fine powder into the separator, and collect the ferronickel slag fine powder with the above different specific surface...

Embodiment 2

[0047] The present invention obtains ferronickel slag micropowders with different specific surface areas by performing a grinding test on ferronickel slag, and compares different ratios according to the method specified in GB / T18046-2008 "Granulated Blast Furnace Slag Used in Cement and Concrete". Surface area of ​​ferronickel slag fine powder is tested for technical indicators.

[0048] 1.1 Activity index determination test

[0049] According to the method specified in GB / T18046-2008 "Granulated Blast Furnace Slag Powder Used in Cement and Concrete", the activity index of nickel-iron slag fine powder 7d and 28d with different specific surface areas was measured, and the results are shown in Table 2;

[0050] Table 2 The activity index value of ferronickel slag powder with different specific surface area

[0051]

[0052] 1.2 Fluidity test

[0053] According to the method specified in GB / T18046-2008 "Granulated Blast Furnace Slag Powder Used in Cement and Concrete", the f...

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Abstract

The invention relates to nickel iron slag micropowder and a preparation method thereof. The method comprises the following steps: performing magnetic separation on nickel iron slag taken as a raw material and grinding the nickel iron slag so as to obtain the nickel iron slag micropowder with the specific surface area being 359.9m<2> / kg to 550m<2> / kg. The specific surface area of the nickel iron slag micropowder is uniformly in distribution; the nickel iron slag micropowder with the certain specific surface area has a good activity index, thereby conforming to the international S75-level standard. In addition, the water content, the ignition loss and the like of the nickel iron slag micropowder all conform to rules in 'Granulated Blast Furnace Slag Powder Used in Cement and Concrete' of GB / T18046-2008. The prepared nickel iron slag micropowder can be taken as a blending stock of the cement and the concrete. Meanwhile, after the nickel iron slag micropowder is prepared from the nickel iron slag, the purposes of recycling wastes and turning wastes into wealth are realized. Thus, pollutions to atmosphere, soil and water, which are caused by the nickel iron slag, are lightened, namely, the ecological environment is optimized; the high added-value is obtained while the cost is low. As a result, the significant economic and social benefits are achieved.

Description

technical field [0001] The invention belongs to the field of green wall materials, in particular to a ferronickel slag micropowder and a preparation method thereof. Background technique [0002] Ferronickel smelting enterprises generally use imported laterite-type nickel oxide ore as raw materials, smelt, reduce and melt into crude ferronickel and slag, and then undergo water quenching to form ferronickel slag; ferronickel slag is used as solid waste , its large amount of emissions is not only a waste of resources, but also occupies land, degrades the surrounding ecological environment, and brings harm to people's health and agricultural production; in addition, enterprises have to invest huge funds every year to solve or alleviate these disadvantages; therefore Solving the problem of solid waste slag utilization such as ferronickel slag is one of the primary tasks for my country to rationally develop and utilize resources and protect the ecological environment. [0003] At p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B18/14
CPCY02W30/91
Inventor 张志民
Owner SHANDONG WEIYE NEW BUILDING MATERIAL
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