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An adsorbent for excess sludge-loaded iron tailings and its application

A technology for excess sludge and iron tailings, applied in the field of air pollution treatment, can solve the problems of waste of useful energy from sludge, environmental pollution, etc., and achieve the effects of reducing treatment costs, simple treatment process, and short adsorption time

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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  • An adsorbent for excess sludge-loaded iron tailings and its application
  • An adsorbent for excess sludge-loaded iron tailings and its application
  • An adsorbent for excess sludge-loaded iron tailings and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A kind of excess sludge loaded iron tailings adsorbent and its preparation method and the effect of treating SO2:

[0031] (1) Dehydrate the Dagushan iron ore tailings (Fe: 12%, Ca: 3.5%, Si: 26%) from Anshan Mining Company, dry them at 150°C for 10 hours, crush them through a 200-mesh sieve, and obtain the pretreatment iron tailings I;

[0032] (2) Dry the sludge at 105° C. for 24 hours, grind it, and sieve it into particles with a particle size of 2 mm to obtain pretreated sludge II;

[0033] (3) Mix the pretreated iron tailings I and the pretreated sludge II according to the weight ratio of 1:5, compact them after stirring for 20 minutes, dry them at 105°C, and calcinate them in a muffle furnace at 500°C for 3h, Cool in isolated air to 25°C. Take the cooled sample and grind it in a mortar until the particle size is 1-2mm.

[0034] The adsorbent for removing SO2 from the sludge-loaded iron tailings prepared by the method has an adsorption capacity of 68 mg / g.

Embodiment 2

[0036] A kind of excess sludge loaded iron tailings adsorbent and its preparation method and treatment of SO 2 Effect:

[0037] (1) Dehydrate the Dagushan iron ore tailings (Fe: 12%, Ca: 3.5%, Si: 26%) from Anshan Mining Company, dry them at 150°C for 10 hours, crush them through a 180-mesh sieve, and obtain the pretreatment iron tailings I;

[0038] (2) Dry the sludge at 105° C. for 24 hours, grind it, and sieve it into particles with a particle size of 1 mm to obtain pretreated sludge II;

[0039] (3) Mix the pretreated iron tailings I and the pretreated sludge II according to the weight ratio of 1:3, compact them after stirring for 20 minutes, dry them at 100°C, and calcinate them in a muffle furnace at 600°C for 2h, After standing for 4 hours, it was isolated from the air and cooled to 25°C. Take the cooled sample and grind it in a mortar until the particle size is 1-2mm.

[0040] The adsorption capacity of the adsorbent SO2 of the sludge loaded iron tailings prepared ...

Embodiment 3

[0042] A kind of excess sludge loaded iron tailings adsorbent and its preparation method and the effect of treating NOx:

[0043] (1) Dehydrate the Dagushan iron ore tailings (Fe: 12%, Ca: 3.5%, Si: 26%) from Anshan Mining Company, dry them at 150°C for 10 hours, crush them through a 250-mesh sieve, and obtain the pretreatment iron tailings I;

[0044] (2) Dry the sludge at 105° C. for 24 hours, grind it, and sieve it into particles with a particle size of 2 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, compact them after stirring for 20 minutes, dry them at 110°C, and calcinate them in a muffle furnace at 700°C for 1.5h , Insulated air cooling to 25 ℃. Take the cooled sample and grind it in a mortar until the particle size is 1-2mm.

[0046] The adsorption capacity of the NOx adsorbent prepared by the method for the sludge-loaded iron tailings is 58 mg / g.

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Abstract

The invention discloses an adsorbent for iron tailings loaded with excess sludge and its application. The preparation method comprises drying the iron tailings and excess sludge respectively, pulverizing them, sieving, mixing and stirring, and putting them in a muffle furnace for calcination. After standing, isolate the air to cool, then grind and crush, that is. The obtained adsorbent of the present invention can adsorb SO 2 or NO X Gas, its adsorption capacity is 53~68mg / g. The raw materials iron tailings and urban surplus sludge used in the adsorbent of the present invention are all solid wastes, the raw materials are abundant, cheap and easy to obtain, the preparation process is simple, the industrial production is easy to realize, and the purpose of using waste to produce waste is achieved.

Description

technical field [0001] The invention relates to air pollution treatment technology, in particular to an adsorbent for iron tailings loaded with excess sludge and its application. 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. The existing iron ore sorting adopts the flotation method, and there is a big gap compared with the international level in terms of production technology, production equipment and automation and continuous degree, and the grade and recovery rate of the refined iron ore cannot reach the target, which not only It brings great inconvenience to the resource utilization of tailings slag, and the production cost is high, which is harmful to human body and environment. With the development of my country's economy, the demand for iron ore in the market is incre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/60B01D53/78B01D53/81
CPCB01D53/60B01D53/78B01D53/81B01D2251/304B01D2251/306B01D2251/604Y02A50/20
Inventor 邵安林许灏李超亮徐连生赵虹宋英辉崔媚华
Owner ANSTEEL GRP MINING CO LTD
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