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A resource utilization method of fly ash, steel slag and coal gangue

A technology of fly ash and coal gangue, applied in applications, home appliances, other home appliances, etc., can solve problems such as inability to repair the surface structure, uncompact structure, waste of resources, etc., and achieve simple manufacturing process, great social benefits and economical Benefits, the effect of reducing transportation costs

Inactive Publication Date: 2015-08-26
贵州绿水青山环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The analysis of the above raw materials shows that there are still recyclable components in fly ash, steel slag and coal gangue. If it is just a simple landfill or brick pressing treatment, this treatment method is a great waste of resources
At the same time, filling with simple landfill and brick pressing treatment cannot repair the original damaged surface structure due to large gaps, uncompact structure, and low strength.

Method used

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  • A resource utilization method of fly ash, steel slag and coal gangue

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Experimental program
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Effect test

Embodiment 1

[0027]Embodiment 1 of the present invention. The resource utilization method of fly ash, steel slag and coal gangue comprises the following steps:

[0028] a. Blend the fly ash into slurry, and then sieve the slurry with a particle size of 24-300 mesh, then magnetically separate the slurry to select the iron ore in the fly ash, and the fly ash after magnetic separation The slurry is flotation to select bauxite, zinc ore, copper ore, molybdenum ore, tin ore and other valuable mineral resources in the fly ash. The specific minerals are determined according to the mineral content of each place. Flotation The method adopts the existing flotation method to obtain fly ash tailings mainly composed of silicon and calcium; the main components of fly ash are oxides of silicon, aluminum, iron and a small amount of other metals. According to the different geological conditions of each producing area, The minerals contained in fly ash are also different. Through the existing flotation pro...

Embodiment 2

[0033] Embodiment 2 of the present invention. The resource utilization method of fly ash, steel slag and coal gangue comprises the following steps:

[0034] a. Blend the fly ash into slurry, and then sieve the slurry with a particle size of 200 mesh, then magnetically separate the slurry to select the iron ore in the fly ash, and the fly ash slurry after magnetic separation Carry out flotation to select bauxite, zinc ore, copper ore, molybdenum ore, tin ore and other valuable mineral resources in fly ash, and obtain fly ash tailings mainly composed of silicon and calcium;

[0035] b. Grinding steel slag, mixing slurry, passing through a 200-mesh sieve, performing magnetic separation, selecting iron ore in steel slag, and obtaining steel slag tailings;

[0036] c. Grind coal gangue, pass it through a 200-mesh sieve, prepare slurry, and carry out flotation of the slurry to select bauxite, zinc ore, copper ore, molybdenum ore, tin ore, carbon and other valuables in coal gangue ...

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Abstract

The invention discloses a pulverized fuel ash, steel slag and coal gangue resource utilization method which is characterized by comprising the steps of: respectively grinding and proportioning pulverized fuel ash, steel slag and coal gangue, and screening after proportioning, wherein the screening granularity is 24-300 meshes; then carrying out magnetic separation on the slurry to separate out iron ore, carrying out floatation on the magnetic-separated slurry to separate out valuable mineral substances to obtain tailings; and preparing the tailings into man-made pouring stone. The pulverized fuel ash, steel slag and coal gangue resource utilization method has the beneficial effects of adjusting measures to local conditions aiming at the problems that the coal mine and mining and metallurgy regions have more underground mine holes and more ground depressions, the geological strength is poor, and the industrial waste pulverized fuel ash, steel slag and coal gangue are difficultly treated and stacked, changing wastes into valuables, firstly separating out the valuable substances from the pulverized fuel ash, steel slag and coal gangue, and then backfilling residual slag of the pulverized fuel ash, steel slag and coal gangue into mine holes and depressions.

Description

technical field [0001] The invention relates to a resource utilization method of fly ash, steel slag and coal gangue, and belongs to the technical field of recycling and resource utilization of fly ash, steel slag and coal gangue and other mining and metallurgy wastes. Background technique [0002] At present, with the development of industry and urban construction, the discharge of fly ash from coal-fired power plants, coal gangue screened out from coal mining, waste from urban expansion and construction, and steel slag from steelmaking plants has increased year by year. It not only takes up a large amount of farmland and land, but also causes environmental pollution. The large number of pits, roadways and goafs left by mining will also cause serious geological disasters and environmental pollution over time, such as landslides, cracks, surface subsidence, water loss, damage to cultivated land, forests, houses, groundwater pollution and Hazards to life and property such as...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B18/08C04B18/14C04B18/12C04B38/02C04B30/00
CPCY02W30/92Y02W30/93Y02W30/94Y02W30/91
Inventor 邹建明阮正林高宏刘钊赵高华魏长春苏向东
Owner 贵州绿水青山环保科技有限公司
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