Preparation method of tailings autoclaved bricks

An autoclaved brick and tailings technology, applied in sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problems of reducing the expected effect of copper slag comprehensive utilization projects, complex components, environmental pollution, etc. Utilize added value, improve quality, alleviate the effect of occupying land

Pending Publication Date: 2018-04-24
JIANGSU PROVINCE METALLURGICAL DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using the rotary hearth furnace direct reduction-grinding magnetic separation process to process one ton of copper slag will produce about 0.4 tons of secondary tailings. Due to its relatively fine particle size (-200 mesh over 80%) and complex components, if it is simply stockpiled, It not only pollutes the environment, but also causes a waste of resources, and also affects the expected effect of reducing copper slag comprehensive utilization projects

Method used

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  • Preparation method of tailings autoclaved bricks

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Such as figure 1 As shown, the preparation method of the tailings autoclaved brick of the present embodiment is as follows:

[0031] (1) Ingredients

[0032] Weigh various raw material components according to the ratio of parts by weight (based on dry materials), and then put them into a strong mixer.

[0033] The specific proportion is: 55 parts by weight of copper slag secondary tailings, 25 parts by weight of carbide slag, 15 parts by weight of cement, and 5 parts by weight of sand. The particle size distribution of sand is 2.5-5.0mm. SiO in secondary tailings of copper slag 2 The content is 55wt%. The secondary tailings of copper slag with particle size below 200 mesh account for more than 80wt% of the total secondary tailings of copper slag. Ca(OH) in carbide slag 2 The content is 80wt%.

[0034] (2) stirring

[0035] Stir in a strong mixer to make the materials evenly mixed, and the stirring time is 30min.

[0036] (3) Compression molding

[0037] The mi...

Embodiment 2

[0045] Such as figure 1 As shown, the preparation method of the tailings autoclaved brick of the present embodiment is as follows:

[0046] (1) Ingredients

[0047] Weigh various raw material components according to the ratio of parts by weight (based on dry materials), and then put them into a strong mixer.

[0048] The specific ratio is: 60 parts by weight of copper slag secondary tailings, 20 parts by weight of carbide slag, 15 parts by weight of cement, and 5 parts by weight of sand. The particle size distribution of sand is 2.5-5.0mm. SiO in secondary tailings of copper slag 2 The content is 65wt%. The secondary tailings of copper slag with particle size below 200 mesh account for more than 80wt% of the total secondary tailings of copper slag. Ca(OH) in carbide slag 2 The content is 85wt%.

[0049] (2) stirring

[0050] Stir in a strong mixer to make the material mix evenly, and the stirring time is 20min.

[0051] (3) Compression molding

[0052]The mixed mater...

Embodiment 3

[0060] Such as figure 1 As shown, the preparation method of the tailings autoclaved brick of the present embodiment is as follows:

[0061] (1) Ingredients

[0062] Weigh various raw material components according to the ratio of parts by weight (based on dry materials), and then put them into a strong mixer.

[0063] The specific proportion is: 65 parts by weight of copper slag secondary tailings, 20 parts by weight of carbide slag, 10 parts by weight of cement, and 5 parts by weight of sand. The particle size distribution of sand is 2.5-5.0mm. SiO in secondary tailings of copper slag 2 The content is 60wt%. The secondary tailings of copper slag with particle size below 200 mesh account for more than 80wt% of the total secondary tailings of copper slag. Ca(OH) in carbide slag 2 The content is 82wt%.

[0064] (2) stirring

[0065] Stir in a strong mixer to make the materials evenly mixed, and the stirring time is 25 minutes.

[0066] (3) Compression molding

[0067] T...

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Abstract

The invention relates to a preparation method of tailings autoclaved bricks. The preparation method includes following steps: 1), stirring secondary tailings, carbide slag, cement and sand, and mixingwell to obtain a mixture; 2), using a brick machine to press and shape the mixture to obtain brick blanks; 3), standing and stacking the pressed brick blanks for maintenance to free water in the brick blanks to be removed; 4), feeding dewatered brick blanks into an autoclave for autoclaving maintenance to obtain the autoclaved bricks. Copper residue tailings are high in SiO2 content, exist mainlyas amorphous-state substances and are suitable for serving as a silicious material to produce autoclaved bricks; the carbide slag is high in yield and difficult to utilize, so that the technical scheme of utilizing the copper residue secondary tailings and adding the carbide slag to produce the autoclaved bricks solves the problem in utilizing the copper residue secondary tailings and provides aproper raw material for the autoclaved bricks.

Description

technical field [0001] The invention relates to the research field of solid waste utilization in nonferrous and ferrous metallurgical industries, and more specifically, relates to a method for preparing tailings autoclaved bricks. Background technique [0002] my country's copper output ranks first in the world, and more than 95% of copper is produced through pyrometallurgy, which produces a large amount of copper slag. Copper slag is rich in iron, silicon and zinc, and can be used as a secondary resource to produce products containing iron, silicon and zinc. The relatively mature copper slag treatment method is that the copper smelting slag undergoes the process of "slow cooling-fine grinding-flotation" to recover copper. Recycling of lead, iron and other elements. Using the rotary hearth furnace direct reduction-grinding magnetic separation process to process one ton of copper slag will produce about 0.4 tons of secondary tailings. Due to its relatively fine particle siz...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B18/14
CPCC04B28/00C04B14/06C04B22/064C04B18/144C04B40/024Y02W30/91
Inventor 吴道洪丁银贵王欣刘占华陈文亮王岩曹志成薛逊
Owner JIANGSU PROVINCE METALLURGICAL DESIGN INST
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