Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of fire-free ceramsite containing arsenic tailings and its preparation method

A technology of tailings and ceramsite, which is applied in the field of arsenic-containing tailings non-fired ceramsite and its preparation, can solve the problems that rarely involve the reuse of arsenic-containing tailings, and achieve the effect of reducing environmental risks

Active Publication Date: 2019-03-22
INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS +1
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, relevant research on arsenic-containing tailings mainly uses one or more of the above methods to remove arsenic in tailings or change the form of arsenic in order to reduce its mobility or toxicity, and rarely involves Reuse of Arsenic Tailings

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of fire-free ceramsite containing arsenic tailings and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The preparation steps of a fire-free ceramsite containing arsenic tailings are as follows:

[0028] (1) Dry mixing of materials: weigh 55% of arsenic tailings, 18% of cement, 3% of iron and manganese materials, 4% of expanded perlite, 2% of quicklime, 18% of fly ash according to weight percentages, add to the mixer, and mix for 3 minutes ;

[0029] (2) Wet mixing of materials: Add 17% of the dry weight of the materials to the mixer and mix for 3 minutes;

[0030] (3) Granulation: adjust the inclination of the disc to 45°, load the wet material into the disc granulator, start the granulator, and start granulation. In the process, add appropriate water or dry materials according to the dry and wet conditions of the ceramsite surface.

[0031] (4) Curing: Curing for 28 days at room temperature for the ceramsite whose particle size meets the requirements.

[0032] The arsenic content in the arsenic tailings is (1620.25±75.12) mg / kg, and the iron-manganese material is configured wit...

Embodiment 2

[0035] The preparation steps of a fire-free ceramsite containing arsenic tailings are as follows:

[0036] (1) Dry mixing of materials: weigh 54% of arsenic-containing tailings, 15% of cement, 2% of iron-manganese materials, 4% of expanded perlite, 2.5% of quicklime, and 22.5% of fly ash by weight, add it to the mixer and mix for 3min ;

[0037] (2) Wet mixing of materials: Add 17% of the dry weight of the materials to the mixer and mix for 3 minutes;

[0038] (3) Granulation: adjust the inclination of the disc to 45°, load the wet material into the disc granulator, start the granulator, and start granulation. In the process, add appropriate water or dry materials according to the dry and wet conditions of the ceramsite surface.

[0039] (4) Curing: Curing for 28 days at room temperature for the ceramsite whose particle size meets the requirements.

[0040] The arsenic content in the arsenic tailings is (1620.25±75.12) mg / kg, and the iron-manganese material is configured with a molar ...

Embodiment 3

[0043] The preparation steps of a fire-free ceramsite containing arsenic tailings are as follows:

[0044] (1) Dry mixing of materials: weigh 50% of arsenic tailings, 18% of cement, 2% of iron-manganese materials, 5% of expanded perlite, 2.5% of quicklime, 22.5% of fly ash, add to mixer, and mix for 3min. ;

[0045] (2) Wet mixing of materials: Add 17% of the dry weight of the materials to the mixer and mix for 3 minutes;

[0046] (3) Granulation: adjust the inclination of the disc to 45°, load the wet material into the disc granulator, start the granulator, and start granulation. In the process, add appropriate water or dry materials according to the dry and wet conditions of the ceramsite surface.

[0047] (4) Curing: Curing for 28 days at room temperature for the ceramsite whose particle size meets the requirements.

[0048] The arsenic content in the arsenic tailings is (1620.25±75.12) mg / kg, and the iron-manganese material is configured with a molar ratio of ferrous sulfate hepta...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
cylinder compressive strengthaaaaaaaaaa
densityaaaaaaaaaa
cylinder compressive strengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to unfired ceramsite comprising arsenic-containing tailings and a preparation method. The unfired ceramsite is prepared from raw materials in percentage by weight as follows: 50%-55% of arsenic-containing tailings, 15%-20% of cement, 2%-3% of a ferro-manganese material 4%-6% of expanded perlite, 2%-2.5% of quick lime, 18%-22.5% of fly ash and mixing water accounting for 15%-20% of the dry weight of the mixture. The preparation method comprises the steps as follows: weighing of the materials, drying mixing of the materials, wet mixing of the materials, granulation and curing. The unfired ceramsite process is simple, convenient to operate and low in energy consumption, the utilization rate of the arsenic-containing tailings and the fly ash is high, the arsenic-containing tailings, the fly ash and other solid wastes can be treated reasonably and effectively, the solid waste resources are recycled, and earthwork consumption during traditional granulation can be reduced.

Description

Technical field [0001] The invention belongs to the field of comprehensive utilization of solid waste, environmental engineering and building materials, and specifically relates to a fire-free ceramsite containing arsenic tailings and a preparation method. Background technique [0002] Arsenic is a trace element widely distributed in nature and belongs to metalloid. The world's proven arsenic reserves are about 2 million tons, of which China accounts for about 70%, ranking first in the world. Arsenic and many of its compounds are widely used in herbicides, rodenticides, semiconductors, coatings and other fields. With the development of industry and agriculture, the mining of arsenic mines is also intensifying, and the output of arsenic-containing tailings is also increasing. According to statistics, arsenic nationwide At least 1.392 million tons were recovered, most of which came from Guangxi, Yunnan, and Hunan, and 70% of the extracted arsenic was discarded in the tailings. It...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C04B18/02C04B28/04C04B111/40
CPCC04B18/027C04B28/04C04B2111/00017C04B2111/40C04B2201/20C04B2201/50C04B18/12C04B22/142C04B22/08C04B14/185C04B22/064C04B18/08
Inventor 阎秀兰吕浩阳费杨
Owner INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS