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Method for modifying dry de-sliming tail mud, and application thereof

A tailings and modification technology, applied in the field of solid waste resource utilization, can solve problems such as loss and adverse effects on high-grade road quality, and achieve the effect of ensuring construction quality

Active Publication Date: 2017-05-31
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the deslimed tailings flow into the market, it is easy to be regarded as ordinary low-plasticity soil and used as high-grade roads, causing adverse effects and heavy losses on the quality of high-grade roads in my country

Method used

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  • Method for modifying dry de-sliming tail mud, and application thereof
  • Method for modifying dry de-sliming tail mud, and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] A modification method for dry desludge tailings, which comprises the following steps:

[0057] 1) Mix the catalyst (iron oxide red) with the dry desliming tailings evenly to obtain mixed tailings, wherein the catalyst accounts for 3% of the mass of the dry desliming tailings;

[0058] 2) Mix 1 volume of acidifying agent (acetic acid) into 10 volumes of water to form a wetting solution, spray the wetting solution accounting for 10% of the mass of dry desliming tailings into the mixed tailings, and mix evenly again to make the tailings In a wet state, wet tailings were obtained, and the obtained wet tailings were observed with a scanning electron microscope. The results showed that the particle size of the modified desliming agent was the same as that before the modification ( figure 1 ) is lower than that, and the original spherical feature disappears, and the particles have a certain polyhedral shape;

[0059] 3) Cover the obtained wet tailings with plastic cloth for 2...

Embodiment 2

[0064] A modification method for dry desludge tailings, which comprises the following steps:

[0065] 1) Mix the catalyst (iron oxide red) with the dry desliming tailings uniformly to obtain mixed tailings, wherein the catalyst accounts for 4% of the mass of the dry desliming tailings;

[0066] 2) Mix 1 volume of acidifier (propionic acid) into 12 volumes of water to form a wetting solution, spray the wetting solution accounting for 10% of the mass of the dry desliming tailings into the mixed tailings, and mix evenly again to make the tailings The mud is in a wet state, and the tailings must be moistened;

[0067] 3) Cover the obtained wet tailings with plastic cloth for 18 hours;

[0068] 4) Remove the plastic cloth and continue to age for 30 days to obtain the modified deslimed tailings.

[0069] Apply the modified desliming tailings obtained in this example to be used as roadbed materials, and the specific steps are as follows:

[0070] A secondary road project requires ...

Embodiment 3

[0072] A modification method for dry desludge tailings, which comprises the following steps:

[0073] 1) Mix the catalyst (iron oxide red) with the dry desliming tailings evenly to obtain mixed tailings, wherein the catalyst accounts for 5% of the mass of the dry desliming tailings;

[0074] 2) Mix 1 volume of acidifying agent (formic acid: acetic acid = 1:1) into 9 volumes of water to form a wetting solution, spray the wetting solution accounting for 8% of the mass of the dry desliming tailings into the mixed tailings, and again Mix evenly so that the tailings are in a wet state, and the tailings must be wet;

[0075] 3) Cover the obtained wet tailings with plastic cloth for 26 hours;

[0076] 4) Remove the plastic cloth and continue to age for 20 days to obtain the modified deslimed tailings.

[0077] Apply the modified desliming tailings obtained in this example to be used as roadbed materials, and the specific steps are as follows:

[0078] A tertiary road project requi...

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Abstract

The invention aims at the potential problems of dry de-sliming tail mud serving as a roadbed material and discloses a method for modifying dry de-sliming tail mud. The method comprises the following steps: 1) mixing a catalyst and dry de-sliming tail mud uniformly to obtain mixed tail mud; 2) mixing an acidifying agent into water to form a wetting solution, spraying the wetting solution into the mixed tail mud, and mixing uniformly to obtain wetted tail mud; 3) performing covering treatment on the wetted tail mud by using plastic cloth; and 4) removing the plastic cloth and continuously performing ageing treatment to obtain the modified de-sliming tail mud. The invention provides a method for wetting and catalytically modifying the dry de-sliming tail mud and further provides a processing method of taking the modified de-sliming tail mud as the roadbed material; the technical indexes meet the requirements of low-grade roads; and the method has important economic and environment benefits and is suitable for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of resource utilization of solid waste, and in particular relates to a modification method and application of dry desludge tailings. Background technique [0002] Rock stripping tailings are a kind of solid waste produced in the process of open pit mining. Before mining ore in an open-pit mine, the layer of rock covering the ore (lean ore with a small mineral content) and the soil on the surface need to be stripped off. This process is called rock stripping. The mixture of rock and soil stripped from large mines is piled up as tailings and has not been effectively utilized. After years of accumulation, a stripped rock tailings tens of meters high has been formed, which can be used as an important secondary resource of stone. The existing stripping tailings mining process usually directly crushes and screens the excavated stripping tailings. Under the impact of mechanical external force accompanying the cru...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B20/02C04B18/12C04B28/00C04B28/10E01C3/00
CPCC04B20/023C04B28/00C04B28/10C04B2111/0075C04B2201/50E01C3/003C04B18/12C04B14/361C04B7/00Y02W30/91
Inventor 康凌晨李富智汤静芳陈云卢丽君熊家剑吴高明韩斌薛改凤
Owner 武汉钢铁有限公司
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