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Baking-free bricks with high nickel slag proportion and preparation method therefor

A high-volume, non-burning brick technology, used in sustainable waste treatment, solid waste management, climate sustainability, etc., can solve problems such as environmental pollution and large footprint, improve performance and reduce grinding difficulty , the effect of enhancing activity

Inactive Publication Date: 2016-08-17
GUANGDONG BUILDING MATERIAL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Nickel slag is the solid waste slag produced by smelting nickel-iron alloy. Nickel-iron alloy is mainly used in the production of stainless steel. Therefore, nickel slag is also called stainless steel slag or nickel-iron slag. Every 1 ton of nickel produced will produce 6-16 tons of nickel slag. The existing nickel Most of the slag is disposed of by stockpiling, which occupies a large area and causes certain environmental pollution

Method used

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  • Baking-free bricks with high nickel slag proportion and preparation method therefor
  • Baking-free bricks with high nickel slag proportion and preparation method therefor
  • Baking-free bricks with high nickel slag proportion and preparation method therefor

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Effect test

Embodiment 1

[0027] The high-volume nickel slag free-burning bricks provided by the present embodiment are made of the following raw materials by mass percentage:

[0028]

[0029] The sum of the mass percentages of the above-mentioned raw materials is 100%.

[0030] Among them, the particle size and coarse nickel slag are obtained by the following methods: firstly, the nickel slag is sieved and classified, and the particle size of the nickel slag is 0 to 9 mm, and the gradation of the nickel slag is analyzed by using a standard set of sieves to determine and distinguish the particle size. The differentiated particle size is determined according to the cumulative sieve residue, and the particle size with the cumulative sieve residue of 40-70% is used as the differentiated particle size. After testing, the differentiated particle size of this embodiment is 1.18mm, and the proportion of coarse nickel slag larger than 1.18mm is 63.2%. The proportion of fine nickel slag smaller than 1.18mm ...

Embodiment 2

[0036] The high-volume nickel slag free-burning bricks provided by the present embodiment are made of the following raw materials by mass percentage:

[0037]

[0038] The sum of the mass percentages of the above-mentioned raw materials is 100%.

[0039] Among them, the distinguishing particle size and coarse nickel slag are obtained by the following methods: firstly, the nickel slag is sieved and classified, and the particle size of the nickel slag is 0-8.5 mm, and the gradation of the nickel slag is analyzed by using a standard set of sieves to determine the distinguishing particle size. , the distinguishing particle size is determined according to the cumulative sieve residue, and the particle size with the cumulative sieving residue of 40-70% is used as the distinguishing particle size. After testing, the distinguishing particle size of this embodiment is 2.36mm, and the proportion of coarse nickel slag larger than 2.36mm is 53.2%. , the proportion of fine nickel slag s...

Embodiment 3

[0045] The high-volume nickel slag free-burning bricks provided by the present embodiment are made of the following raw materials by mass percentage:

[0046]

[0047] The sum of the mass percentages of the above-mentioned raw materials is 100%.

[0048] The distinguishing particle size and coarse nickel slag are obtained by the following methods: Firstly, the nickel slag is sieved and classified, and the gradation of the nickel slag is analyzed by using a standard set of sieves to determine the distinguishing particle size. The particle size with a sieve residue of 40-70% is used as the distinguishing particle size. After testing, the distinguishing particle size in this embodiment is 1.18mm, the proportion of coarse nickel slag larger than 1.18mm is 58.2%, and the fine nickel slag smaller than 1.18mm is all. The proportion is 41.8%.

[0049] The nickel slag powder is obtained by the following method: the fine nickel slag and the steel slag with a particle size of 1.0-2.0...

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Abstract

The invention discloses baking-free bricks with high nickel slag proportion. The baking-free bricks are mainly prepared from the following raw materials in percentage by mass: 40% to 70% of crude nickel slag, 20% to 40% of nickel slag powder, 4% to 12% of cement and 6% to 14% of water, wherein the sum of mass percents of the raw materials is 100%. According to the baking-free bricks, the gradation composition and chemical ingredients of the nickel slag are optimized according to physico-chemical characteristics of the nickel slag, the difficulty of pulverizing of the nickel slag is lowered by using the synergistic effect of co-pulverizing of steel slag and the nickel slag, and the activity of powder is improved, so that the abandoned nickel slag can be effectively utilized in a resource-converting manner. The invention further discloses a preparation method for the baking-free bricks with high nickel slag proportion. The preparation method is reliable in process and low in cost, and the nickel slag can be utilized to the maximum.

Description

technical field [0001] The invention belongs to the technical field of non-burning bricks, in particular to a non-burning brick with a large amount of nickel slag and a preparation method thereof. Background technique [0002] Nickel slag is the solid waste slag produced by smelting nickel-iron alloy. Nickel-iron alloy is mainly used for stainless steel production. Therefore, nickel slag is also called stainless steel slag or nickel-iron slag. Every 1t of nickel produced will produce 6-16t nickel slag. Most of the slag is piled up, which occupies a large area and causes certain environmental pollution. [0003] The main components of nickel slag are CaO, MgO, Al 2 O 3 , SiO 2 and Fe 2 O 3 , of which CaO, MgO, Al 2 O 3 low content, SiO 2 and Fe 2 O 3 The content is high, and the overall acidity is acidic. Compared with other smelting waste slag, such as granulated blast furnace slag and steel slag (both of which are alkaline waste slag), its typical characteristics...

Claims

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Application Information

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IPC IPC(8): C04B28/02C04B18/14
CPCC04B28/02C04B18/144C04B20/0076Y02W30/91
Inventor 陈哲谢红波麦俊明李凤娇
Owner GUANGDONG BUILDING MATERIAL RES INST
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