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A modified adsorbent loaded with excess sludge and iron tailings and its preparation method

A technology for excess sludge and iron tailings, applied in separation methods, chemical instruments and methods, and separation of dispersed particles, can solve the problems of waste of useful energy for sludge, environmental pollution, etc., achieve short adsorption time, low cost, and efficient treatment low cost effect

Active Publication Date: 2021-07-13
ANSTEEL GRP MINING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Arbitrary stacking and discharge of a large amount of untreated sludge will not only cause new pollution to the environment, but also waste useful energy in the sludge

Method used

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  • A modified adsorbent loaded with excess sludge and iron tailings and its preparation method
  • A modified adsorbent loaded with excess sludge and iron tailings and its preparation method
  • A modified adsorbent loaded with excess sludge and iron tailings and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A modified adsorbent loaded with excess sludge and iron tailings and its preparation method for adsorbing SO 2 Effect:

[0037] (1) Dehydration of Dagushan iron ore tailings (Fe: 12%, Ca: 3.5%, Si: 26%) from Anshan Mining Company was dried at 150° C. for 10 h, crushed with a ball mill, and passed through a 200-mesh sieve, Obtain pretreated iron tailings I;

[0038] (2) Dry the sludge at 105°C for 20-24 hours, grind it, and sieve it into particles with a particle size of 2mm to obtain pretreated sludge II;

[0039] (3) Mix the pretreated iron tailings I and the pretreated sludge II according to the weight ratio of 1:1, and add the zinc chloride solution whose activating agent is 5mol / L, and the volume ratio of the added amount to the iron tailings 1:30, mixed and stirred for 1 hour, suction filtered, dried at 100°C, placed in a muffle furnace, calcined at 400°C for 3 hours, isolated from the air and cooled to room temperature, and then cleaned, first with 1moL / L hydroc...

Embodiment 2

[0042] Effect of a kind of excess sludge loaded iron tailings modified adsorbent and preparation method thereof:

[0043] (1) Dehydration of Dagushan iron ore tailings (Fe: 12%, Ca: 3.5%, Si: 26%) from Anshan Mining Company was dried at 150°C for 8 hours, crushed with a ball mill, and passed through a 180-mesh sieve, Obtain pretreated iron tailings I;

[0044](2) Dry the sludge at 100° C. for 24 hours, grind it, and sieve it into particles with a particle size of 1 mm to obtain pretreated sludge II;

[0045] (3) Mix the pretreated iron tailings I and the pretreated sludge II according to the weight ratio of 1:2, add the potassium hydroxide solution of 4mol / L as the activating agent, and the volume ratio of the added amount to the iron tailings 1:20, mixed and stirred for 1h, filtered with suction, dried at 105°C, put in a muffle furnace, calcined at 500°C for 6h, left for 3h, isolated from the air and cooled to room temperature, and then cleaned, first with 1moL / L Wash with ...

Embodiment 3

[0048] A kind of excess sludge loaded iron tailings modified adsorbent and its preparation method adsorb NO effect:

[0049] (1) Dehydration of Dagushan iron ore tailings (Fe: 12%, Ca: 3.5%, Si: 26%) from Anshan Mining Company was dried at 150° C. for 10 h, crushed with a ball mill, and passed through a 240-mesh sieve, Obtain pretreated iron tailings I;

[0050] (2) Dry the sludge at 105° C. for 24 hours, grind it, and sieve it into particles with a particle size of 1.5 mm to obtain pretreated sludge II;

[0051] (3) The pretreated iron tailings I and the pretreated sludge II are mixed according to a weight ratio of 1:3, and the activator is added as a potassium carbonate solution of 3mol / L, and the volume ratio of its addition to the iron tailings is 1:50, mixed and stirred for 1 hour, suction filtered, dried at 130°C, placed in a muffle furnace, calcined at 700°C for 7 hours, isolated from the air and cooled to room temperature, and then cleaned, first washed with 1moL / L hy...

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Abstract

The invention relates to a modified adsorbent for excess sludge loaded with iron tailings. The iron tailings and sludge are dried separately, crushed, sieved, mixed evenly, and added with zinc chloride, potassium hydroxide or potassium carbonate. The activator aqueous solution is mixed and stirred, then suction filtered, dried, calcined in a muffle furnace, cooled with isolated air after standing, washed with hydrochloric acid and distilled water, and dried. The raw iron tailings and urban sludge used in the invention are all solid wastes, rich in raw materials, cheap and easy to obtain, simple in preparation process, easy to realize industrialized production, and achieve the purpose of using waste to make waste. The adsorption capacity of the present invention is 65-87mg / g.

Description

technical field [0001] The invention relates to air pollution treatment technology, in particular to a modified adsorbent loaded with excess sludge and iron tailings and a preparation method thereof. Background technique [0002] Iron ore is an important chemical mineral raw material for ironmaking and other industrial products. my country is rich in iron ore resources, ranking among the top in the world and distributed in almost every province. my country's existing iron ore sorting adopts flotation method. Compared with the international level, there is a big gap between the production process, production equipment and the degree of automation and continuity, and the grade and recovery rate of the refined iron ore cannot reach the target. It not only brings great inconvenience to resource utilization of tailings slag, but also has high production cost and great harm to human body and environment. With the development of my country's economy, the market demand for iron ore ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/60B01D53/78B01D53/81
CPCB01D53/60B01D53/78B01D53/81B01D2251/304B01D2251/306B01D2251/604
Inventor 邵安林李超亮徐连生高江赵虹崔媚华
Owner ANSTEEL GRP MINING CO LTD
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