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Nickel slag brick and preparation method thereof

A technology of nickel slag and formula, which is applied in the field of nickel slag bricks and its preparation, can solve the problems of comprehensive utilization of nickel slag, poor activity, low mass fraction, etc., and achieve low equipment investment, high slag consumption, and low energy consumption Effect

Inactive Publication Date: 2013-11-27
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] It can be seen that nickel slag is an acidic slag with a low mass fraction and poor activity, so the comprehensive utilization of nickel slag is a difficult problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0042] The invention also provides a method for preparing nickel slag bricks. First, weigh the required nickel slag, industrial waste slag, lime and cement according to the formula ratio and dry mix them until they are evenly mixed; then slowly add water into the uniformly mixed powder according to the formula ratio , Stir until uniform wet granular state; fill the mold with wet bulk, and carry out compression molding.

[0043] The formed nickel slag bricks are cured by steam or naturally.

[0044] The steam curing is steam curing under the condition of 80-90°C, and the curing time is 1-2 days.

[0045] Described natural conservation is to be placed in the air and sprinkle water conservation, and conservation time is 28 days.

[0046]

Embodiment 1

[0048] Nickel slag 67.4%

[0049] Industrial waste 8.5%

[0050] Lime 8.4%

[0051] Cement 0.4%

[0052] Water 15.3%

[0053] Weigh the required nickel slag, industrial waste residue, lime, cement and other dry substances according to the formula ratio, and dry stir for 1 minute to make them evenly mixed together; slowly add the formula ratio water to the evenly mixed powder, and stir To a uniform wet granular state; then fill the mold with the wet bulk, and carry out compression molding; after demolding, the nickel slag bricks are placed in a steam curing box at a temperature of 80°C for 1 day.

[0054] Its performance is measured as follows:

[0055] The compressive strength is 3.3 MPa, and the flexural strength is 1.2 MPa

Embodiment 2

[0057] Nickel slag 52.2%

[0058] Industrial waste 25.0%

[0059] Lime 8.7%

[0060] Cement 0.3%

[0061] Water 13.8%

[0062] Weigh the required nickel slag, industrial waste residue, lime, cement and other dry substances according to the formula ratio, and dry stir for 1 minute to make them evenly mixed together; slowly add the formula ratio water to the evenly mixed powder, and stir To a uniform wet granular state; then fill the mold with the wet bulk, and carry out compression molding; after demolding, the nickel slag bricks are placed in a steam curing box at a temperature of 80°C for 1 day.

[0063] Its performance is measured as follows:

[0064] The compressive strength is 5.2MPa, and the flexural strength is 1.8MPa

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Abstract

The invention discloses a nickel slag brick and a preparation method thereof. The nickel slag brick is a novel nickel slag brick which is prepared by taking water quenching nickel slag a main material and industrial waste residue, lime, a little quantity of cement and a proper quantity of water as assistant materials in the procedures of uniformly stirring, then moulding by adopting a compression moulding forming process, and finally carrying out steam curing or natural curing. The components and mass percentage thereof are as follows: 51.1-67.4% of nickel slag, 8.5-25.0% of industrial waste residue (coal ash), 8.4-8.7% of lime, 0.3-12.9% of cement and 13.8-15.3% of water. Slag consumption rate of the unfired nickel slag brick prepared by the invention is more than 50%, therefore, not only is nickel slag waste effectively utilized, but also high temperature calcination is not needed during preparation, the mechanical strength is high, and the durability is excellent. The nickel slag brick has the prominent characteristics of waste utilization, environmental protection, regeneration, energy conservation and the like, and has wide application and development prospects.

Description

[0001] technical field [0002] The invention relates to a nickel slag brick and a preparation method thereof, belonging to the field of resource utilization of waste slag. Background technique [0003] Nickel slag is a kind of industrial waste slag discharged in the process of smelting nickel metal, that is, the slag formed in the process of smelting nickel in the form of CaO, SiO 2 、Al 2 o 3 The main component of the melt. Nickel slag can be divided into dry slag and water slag according to its formation method, and the finely ground water slag has potential pozzolanic activity. With the rapid development of the economy, my country's nickel production has grown rapidly in recent years. In 1997, it was only nearly 40,000 tons, in 2004 it reached 67,000 tons, and in 2012 it reached 220,300 tons. However, about 6-16 tons of slag are discharged from 1 ton of nickel produced by the flash furnace smelting method. A smelting group in Gansu Province in my country alone dischar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/10C04B18/14
CPCY02W30/91
Inventor 张云升郭盼盼刘国建
Owner SOUTHEAST UNIV
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