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Method for producing dry-mixed mortar from metal tailing slag

A technology of dry-mixed mortar and metal tailings, which is applied in the field of dry-mixed mortar produced from metal tailings slag, can solve problems such as lack of research, achieve the effects of reducing production costs, solving high stockpiling costs, and significant economic benefits

Inactive Publication Date: 2018-07-20
李肇炯 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Dry-mixed mortar requires finer aggregate size, but research on how to apply tailings ultra-fine sand to dry-mixed mortar with good production performance is relatively scarce

Method used

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  • Method for producing dry-mixed mortar from metal tailing slag

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A method for producing dry-mixed mortar from metal tailings slag, comprising the following steps:

[0023] S1. Dry the metal tailings slag through a dryer, and then remove iron through a magnetic separator. The metal tailings slag is in accordance with the "Leach Toxicity Identification of Hazardous Waste Identification Standards" GB 5085.3-2007 and "Radionuclide Limits for Building Materials" The relevant regulations of GB6566-2010 test its internal exposure index, external exposure index, copper content, zinc content, cadmium content, lead content, total chromium content, hexavalent chromium content, beryllium content, barium content, nickel content, total silver content, The arsenic content, selenium content, and the test results all meet the standards; the metal tailings are iron tailings or copper tailings;

[0024] S2. Screen the metal tailings slag obtained in step S1 from large to small through vibrating particle size sieves of 4.75mm, 2.36mm, 0.63mm, and 0.16mm...

Embodiment 2

[0029] The method of utilizing metal tailings slag to produce dry-mixed mortar shown in this embodiment, its steps S1, S2 are the same as embodiment one, and the difference from embodiment one is:

[0030] S3. According to the percentage by weight, add 0.25% activator and 99.75% metal tailings ultra-fine sand to the mixer for stirring and homogenization, and then grind with an activated energy-saving mill to obtain a specific surface area of ​​500m 2 kg -1 tailings fine powder;

[0031] S4, the metal tailings fine sand obtained in step S2, the metal tailings medium sand and the metal tailings coarse sand are mixed together to obtain A sand, according to the weight ratio, 19.97% cement, 60% A sand, 20 % tailings fine powder and 0.03% water-retaining agent were put into a mixer for stirring and homogenizing to prepare dry-mixed mortar for masonry.

[0032] The cement is 42.5R general-purpose Portland cement, the activator is composed of glycerin, triisopropanolamine, molasses,...

Embodiment 3

[0034] The method of utilizing metal tailings slag to produce dry-mixed mortar shown in this embodiment, its steps S1, S2 are the same as embodiment one, and the difference from embodiment one is:

[0035] S3. According to the percentage by weight, add 0.20% activator and 99.80% metal tailings ultra-fine sand to the mixer for stirring and homogenization, and then grind with an activated energy-saving mill to obtain a specific surface area of ​​500m 2 kg -1 tailings fine powder;

[0036] S4, the metal tailings fine sand obtained in step S2, the metal tailings medium sand and the metal tailings coarse sand are mixed together to obtain A sand, and according to the weight ratio, 17% cement, 65% A sand, 17.97 % tailings fine powder and 0.03% water-retaining agent were put into a mixer for stirring and homogenizing to prepare dry-mixed mortar for masonry.

[0037] The cement is 42.5R general-purpose Portland cement, the activator is composed of glycerin, triisopropanolamine, molas...

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Abstract

The invention discloses a method for producing dry-mixed mortar from metal tailing slag. The method comprises the following steps: S1, drying the metal tailing slag and removing iron; S2, grading themetal tailing slag obtained in S1 according to the particle size and storing the metal tailing slag as metal tailing superfine sand, metal tailing fine sand, metal tailing medium sand and metal tailing coarse sand for standby application; S3, stirring an activator and the metal tailing superfine sand in a certain proportion evenly, and then performing grinding to obtain tailing powder; S4, matching the metal tailing fine sand, the metal tailing medium sand, the metal tailing coarse sand, cement, the tailing powder and a water retaining agent in a certain proportion, and performing stirring uniformly to obtain the dry-mixed mortar. The metal tailings are used gradiently according to different particle grades, zero treatment of the tailings is achieved, waste is turned into wealth, and the produced dry-mixed mortar has good comprehensive performance and remarkable economic, environmental and social benefits.

Description

technical field [0001] The invention relates to a production method of dry-mixed mortar, in particular to a method for producing dry-mixed mortar from metal tailings. Background technique [0002] Metal tailings slag is the waste discharged from the mineral processing plant after selecting concentrate and other useful components through the mineral processing process. It needs to occupy a large amount of land for stockpiling. The resulting land acquisition costs and maintenance costs account for 5-40% of the entire mineral processing enterprise investment. The particles of metal tailings slag are extremely fine, and it is easy to cause dust pollution (even sandstorms) when carried by the wind, and it will pollute the water body and block the river when the surface water flows into the water body. At the same time, it also contains some useful components that can be further developed, so it has The dual characteristics of environmental pollution and secondary resources. With...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2111/00017C04B2201/10C04B2201/50C04B18/12C04B14/06C04B24/02C04B24/122C04B18/18C04B24/383C04B24/38C04B20/0076
Inventor 李肇炯李文娟李生白林生利吴建胜
Owner 李肇炯
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