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Harmless resourceful treatment method for barium slag and prepared building material

A treatment method and a resource-recycling technology are applied in the field of barium slag harmless and resource-recycling treatment methods and the field of prepared building materials, which can solve the problems of difficult operation of barium slag, inability to effectively connect harmless and resourceful, and the like. rate requirements, meet the sufficiency of material fluidity and contact, and reduce the effect of leaching toxicity

Active Publication Date: 2022-04-15
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of this application is to provide a method for the harmless and resourceful treatment of barium slag and the prepared building materials to solve the existing difficulties in the process of harmless and resourceful barium slag and the inability to effectively connect harmless and resource recovery. the problem of

Method used

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  • Harmless resourceful treatment method for barium slag and prepared building material
  • Harmless resourceful treatment method for barium slag and prepared building material
  • Harmless resourceful treatment method for barium slag and prepared building material

Examples

Experimental program
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Effect test

Embodiment 1

[0054] This embodiment provides a method for harmless and resourceful treatment of barium slag, comprising the following steps:

[0055] (1) Prepare sodium persulfate, ferrous sulfate, magnesium sulfate, and lignosulfonate in a mass ratio of 3:1:6:1 to form a stabilizer solution with a mass concentration of 10%;

[0056] (2) Add 80 kg of barium slag, 20 kg of medium coarse sand, and 15 kg of quicklime into the wheel mill, add 30 kg of the stabilizer solution prepared in step (1) into the wheel mill, and knead in the wheel mill for 20 minutes;

[0057] (3) Add 0.2kg of sodium hydroxide, 50kg of fly ash, 10kg of gypsum, 15kg of cement, and 5.4kg of magnesium oxide into the wheel mill, and continue mixing for 3 minutes;

[0058] (4) The mixture obtained in step (3) is vibrated and molded, and the barium slag building material can be obtained after moisturizing and curing for 28 days.

[0059] The strength performance test and barium ion leaching toxicity test were carried out on...

Embodiment 2

[0062] This embodiment provides a method for harmless and resourceful treatment of barium slag, comprising the following steps:

[0063] (1) Prepare sodium persulfate, ferrous sulfate, magnesium sulfate, and lignosulfonate in a mass ratio of 3:1:6:1 to form a stabilizer solution with a mass concentration of 15%;

[0064] (2) Add 80 kg of barium slag, 20 kg of medium coarse sand, and 15 kg of quicklime into the wheel mill, add 30 kg of the stabilizer solution prepared in step (1) into the wheel mill, and knead in the wheel mill for 20 minutes;

[0065] (3) Add 0.4kg of sodium hydroxide, 50kg of fly ash, 10kg of gypsum, 15kg of cement, and 8.1kg of magnesium oxide into the wheel mill, and continue mixing for 5 minutes;

[0066] (4) The mixture obtained in step (3) is vibrated and molded, and the barium slag building material can be obtained after moisturizing and curing for 28 days.

[0067] image 3 It is a microscopic schematic diagram of the barium slag building material pr...

Embodiment 3

[0070] This embodiment provides a method for harmless and resourceful treatment of barium slag, comprising the following steps:

[0071] (1) Prepare sodium persulfate, ferrous sulfate, magnesium sulfate, and lignosulfonate in a mass ratio of 3:1:6:1 to form a stabilizer solution with a mass concentration of 15%;

[0072] (2) Add 75 kg of barium slag, 25 kg of medium coarse sand, and 15 kg of quicklime into the wheel mill, add 25 kg of the stabilizer solution prepared in step (1) into the wheel mill, replenish 3.75 kg of water, and knead in the wheel mill 20 minutes;

[0073] (3) Add 0.4kg of sodium hydroxide, 50kg of fly ash, 10kg of gypsum, 15kg of cement, and 5.6kg of magnesium oxide into the wheel mill, and continue mixing for 5 minutes;

[0074] (4) The mixture obtained in step (3) is vibrated and molded, and the barium slag building material can be obtained after moisturizing and curing for 28 days.

[0075] With reference to the same test method as in Example 1, after ...

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Abstract

The invention relates to a barium slag harmless resourceful treatment method and a prepared building material.The method comprises the steps that a proper amount of oxidizing agent, ferrous sulfate, magnesium sulfate and dispersing agent are dissolved with water, and a stabilizer solution is obtained; adding a proper amount of barium slag, medium-coarse sand and quick lime into an edge runner mill, adding the stabilizer solution into the edge runner mill, supplementing a proper amount of water, and uniformly mixing to obtain a first mixture; adding a proper amount of sodium hydroxide, fly ash, gypsum, cement and magnesium oxide into the first mixture, and continuing mixing to obtain a second mixture; and carrying out vibration compression molding on the second mixture, and preserving moisture and curing to obtain the barium residue building material. According to the method, wheel rolling equipment is utilized, harmlessness and recycling of the barium slag are carried out in the same equipment step by step, excessive soluble sulfate is utilized step by step to fix barium, meanwhile, magnesium oxide is added later to eliminate the influence of soluble magnesium sulfate on the performance of the building material, and the barium ion leaching toxicity of the obtained barium slag building material is low and is as low as about 0.3 mg / L.

Description

technical field [0001] The application belongs to the field of solid waste recycling, and in particular relates to a method for harmless recycling of barium slag and a prepared building material. Background technique [0002] In the process of producing barium sulfate from barite, the barite with a grade of more than 85% (mainly containing barium sulfate) and raw coal (containing more than 65% carbon) are usually mixed and crushed into a particle size of less than 3mm at the ratio of 100:25-26. Mix the materials, put them into the rotary kiln for roasting, and produce crude barium sulfide containing 65%-70% of barium sulfide, and the crude barium sulfide will be leached to produce qualified barium sulfide. This process is generally called thermal reduction-water immersion process. The residue left after soaking barium sulfide in water in this process is barium slag, which generally contains 30-45% water. Barium slag generally contains acid-soluble barium (referring to hydr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/02C04B20/02C04B18/04
CPCC04B28/02C04B20/026C04B20/023C04B18/0472C04B2201/50C04B2111/00017C04B14/06C04B22/064C04B22/066C04B22/143C04B18/08Y02W30/91
Inventor 张志远张付申
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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