CN106746822A - A kind of chemical preparation process of active gangue - Google Patents

Abstract

A kind of chemical preparation process of active gangue, belongs to gangue reutilization technology field, solves the shortcoming of the aspects such as tight, the comprehensive activation effect difference of high energy consumption present in existing activating coal gangue technology, ingredient requirement, and solution is：1）Gangue is pre-processed；2）The preparation of activator；3）The activator aqueous solution that will be prepared uniformly is sprayed in gangue powder, static prepared active gangue after stirring.The present invention is compared with prior art, relatively low to coal shale in brick making component requirements, can substantially reduce energy consumption and substantially eliminate the environmental pollution of calcination process；Selected activating reagent does not have corrosivity, it is easy to allotment production；Chemical activating process is more loose to carbon content requirement in gangue, can not only process the gangue for meeting requirement after pretreatment, it is also possible to which directly treatment meets desired coal shale in brick making, for the application field for widening gangue raw material has practical value.

Description

A kind of chemical preparation process of active gangue

Technical field

The invention belongs to gangue reutilization technology field, more particularly to a kind of chemical preparation process of active gangue.

Background technology

With the development that World Economics high speed is swift and violent, all trades and professions are increasing to the demand of the energy, and coal is used as mesh The huge solid fuel of reserves, is all favored by people all the time on former world, as daily life and production can not or Scarce Energy supply material.But, with a large amount of exploitations of coal, the solid waste with gangue as representative is continuously opened Extraction comes, and because its carbon content is relatively low, simultaneously containing substantial amounts of clay minerals, be not easy to do Energy supply material.Therefore, largely appointed Meaning is stacked, and on the one hand not only occupies substantial amounts of soil and farmland, and the gangue of another aspect bulk deposition is tended to occur certainly Combustion, produces toxic gas and a large amount of dust, and these materials are dissolved in air and soil, neighbouring ecological environment are caused serious Pollution.

According to country's issue《Gangue comprehensively utilizes management method》The gangue of middle proposition is comprehensively utilized with large profit With attaching most importance to, by coal gangue power generation, gangue building materials and product, large profits such as backfill and coal gangue hill harmless treatment of reclaiming With bastard coal Stone technique as main direction.Gangue belongs to gangue in the important application side of building materials field as cement mixture To, it is necessary to carry out activity excitation to gangue, active mode include forged burn, highly basic effect, mechanical grinding and two or more Hybrid mode.Forged burned coal gangue activation effect is preferable, but it is too high to consume energy, and economic feasibility is poor；Highly basic acts on bastard coal Stone is higher to feed carbon content requirement, typically requires that gangue is not carbon containing or phosphorus content is relatively low, can otherwise give building material product band Carry out long-term safety hidden danger；Mechanical grinding gangue synthesis activation effect is poor, and the complementary means of activation are only used as at present.

The content of the invention

A kind of shortcoming it is an object of the invention to overcome prior art, there is provided chemical preparation process of active gangue, Solve the shortcoming of the aspects such as tight, the comprehensive activation effect difference of high energy consumption present in existing activating coal gangue technology, ingredient requirement.

The present invention is achieved by the following technical solutions：A kind of chemical preparation process of active gangue, it is by following Step is constituted：

1）Gangue is pre-processed：Using either physically or chemically carrying out carbonization treatment and desulfurization process successively to coal shale in brick making, Make its loss on ignition≤8%, SO₃Content≤3.5%, 80 μm of square hole screens tail over≤10%, described either physically or chemically to include but not only It is limited to jigging treatment, chute treatment, shaking table treatment and flotation treatment；

2）The preparation of activator：Take naphthalene system, 0.0102%~0.0130% trimerization that mass fraction is 0.1987%~0.2518% Cyanamide, 0.0095%~0.0145% sodium metasilicate, 0.1891%~0.2658% miberal powder are well mixed, and are formulated as concentration and are 0.3%~0.8% activator aqueous solution；

3）It is 99.4714%~99.5591% that the activator aqueous solution that will be prepared uniformly is sprayed to mass fraction in 5min In gangue powder, 2~4h is stirred by mixer, mixer rotating speed is 30~60r/min, stirring terminates rear static 24~ 48h, is obtained activity gangue.

The present invention is compared with prior art, relatively low to coal shale in brick making component requirements, can process high-carbon high-sulfur content Gangue, after coal shale in brick making is by decarburization, desulfurization process, loss on ignition, sulphur etc. are down to reasonable level（Loss on ignition≤8.0%, SO₃Content≤3.5%）, the carbon sloughed, sulphur can be used as industry byproduct, and desulfurization and decarburization belongs to physical process, is removed compared to calcining Carbon, sulphur removal mode, can substantially reduce energy consumption and substantially eliminate the environmental pollution of calcination process；Activating reagent of the invention selected with it is existing There is alkali activator to compare, without corrosivity, it is easy to allotment production；Chemical activating process of the invention contains to carbon in gangue Amount requires more loose（Loss on ignition≤8.0%）, can not only process and meet requirement after pretreatment（Loss on ignition≤8.0%, SO₃ Content≤3.5%）Gangue, it is also possible to directly treatment meet require（Loss on ignition≤8.0%, SO₃Content≤3.5%）Bastard coal Stone raw material, for the application field for widening gangue raw material has practical value.

Specific embodiment

Technical scheme is clearly and completely described below in conjunction with embodiment.

Embodiment 1

The chemical preparation process of the active gangue in the present embodiment, it is made up of the following steps：

1）Gangue is pre-processed：Using either physically or chemically carrying out carbonization treatment and desulfurization process successively to coal shale in brick making, Make its loss on ignition≤8%, SO₃Content≤3.5%, 80 μm of square hole screens tail over≤10%, described either physically or chemically to include but not only It is limited to jigging treatment, chute treatment, shaking table treatment and flotation treatment；

2）The preparation of activator：Take naphthalene system, 0.013% melamine, 0.0145% silicic acid that mass fraction is 0.2518% Sodium, 0.2493% miberal powder are well mixed, and are formulated as the activator aqueous solution that concentration is 0.3%；

3）The activator aqueous solution that will be prepared uniformly is sprayed to the gangue powder that mass fraction is 99.4714% in 5min In, 2h is stirred by mixer, mixer rotating speed is 30r/min, and stirring terminates rear static 24h, and activity gangue is obtained.

Embodiment 2

The chemical preparation process of the active gangue in the present embodiment, it is made up of the following steps：

1）Gangue is pre-processed：Using either physically or chemically carrying out carbonization treatment and desulfurization process successively to coal shale in brick making, Make its loss on ignition≤8%, SO₃Content≤3.5%, 80 μm of square hole screens tail over≤10%, described either physically or chemically to include but not only It is limited to jigging treatment, chute treatment, shaking table treatment and flotation treatment；

2）The preparation of activator：Take naphthalene system, 0.0102% melamine, 0.0095% silicic acid that mass fraction is 0.1987% Sodium, 0.2225% miberal powder are well mixed, and are formulated as the activator aqueous solution that concentration is 0.8%；

3）The activator aqueous solution that will be prepared uniformly is sprayed to the gangue powder that mass fraction is 99.5591% in 5min In, 4h is stirred by mixer, mixer rotating speed is 60r/min, and stirring terminates rear static 48h, and activity gangue is obtained.

Embodiment 3

The chemical preparation process of the active gangue in the present embodiment, it is made up of the following steps：

1）Gangue is pre-processed：Using either physically or chemically carrying out carbonization treatment and desulfurization process successively to coal shale in brick making, Make its loss on ignition≤8%, SO₃Content≤3.5%, 80 μm of square hole screens tail over≤10%, described either physically or chemically to include but not only It is limited to jigging treatment, chute treatment, shaking table treatment and flotation treatment；

2）The preparation of activator：Take naphthalene system, 0.013% melamine, 0.0145% silicic acid that mass fraction is 0.2353% Sodium, 0.2658% miberal powder are well mixed, and are formulated as the activator aqueous solution that concentration is 0.5%；

3）The activator aqueous solution that will be prepared uniformly is sprayed to the gangue powder that mass fraction is 99.4714% in 5min In, 2.5h is stirred by mixer, mixer rotating speed is 40r/min, and stirring terminates rear static 30h, and activity gangue is obtained.

Embodiment 4

The chemical preparation process of the active gangue in the present embodiment, it is made up of the following steps：

1）Gangue is pre-processed：Using either physically or chemically carrying out carbonization treatment and desulfurization process successively to coal shale in brick making, Make its loss on ignition≤8%, SO₃Content≤3.5%, 80 μm of square hole screens tail over≤10%, described either physically or chemically to include but not only It is limited to jigging treatment, chute treatment, shaking table treatment and flotation treatment；

2）The preparation of activator：Take naphthalene system, 0.012% melamine, 0.0135% sodium metasilicate that mass fraction is 0.24%, 0.1891% miberal powder is well mixed, and is formulated as the activator aqueous solution that concentration is 0.6%；

3）The activator aqueous solution that will be prepared uniformly is sprayed to the gangue powder that mass fraction is 99.5454% in 5min In, 3h is stirred by mixer, mixer rotating speed is 50r/min, and stirring terminates rear static 40h, and activity gangue is obtained.

The present invention can be embodied without deviating from the spiritual or substantive of invention in a variety of forms, it should therefore be appreciated that on State embodiment and be not limited to foregoing details, and should widely be explained in the range of claim is limited, therefore fall into right and want Ask or its equivalent scope in change and remodeling all should be claim and covered.

Claims (1)

1. a kind of chemical preparation process of active gangue, it is characterised in that：It is made up of the following steps：

1）Gangue is pre-processed：Using either physically or chemically carrying out carbonization treatment and desulfurization process successively to coal shale in brick making, Make its loss on ignition≤8%, SO₃Content≤3.5%, 80 μm of square hole screens tail over≤10%, described either physically or chemically to include but not only It is limited to jigging treatment, chute treatment, shaking table treatment and flotation treatment；

2）The preparation of activator：Take naphthalene system, 0.0102%~0.0130% trimerization that mass fraction is 0.1987%~0.2518% Cyanamide, 0.0095%~0.0145% sodium metasilicate, 0.1891%~0.2658% miberal powder are well mixed, and are formulated as concentration and are 0.3%~0.8% activator aqueous solution；

3）It is 99.4714%~99.5591% that the activator aqueous solution that will be prepared uniformly is sprayed to mass fraction in 5min In gangue powder, 2~4h is stirred by mixer, mixer rotating speed is 30~60r/min, stirring terminates rear static 24~ 48h, is obtained activity gangue.