KR101750492B1 - Solidification material making method for utilizing waste gypsum as public waters reclamation soil - Google Patents

Abstract

A method for manufacturing a solid fire to utilize a waste rock as a shared reclaimed land is disclosed. The method includes a magnetic force selection step (110) for sorting a magnetic object contained in a waste rock by using a magnetic force, a crushing step (120) for crushing a waste rock selected from the magnetic objects using a crusher, A primary sorting step (130) of separating the low specific gravity material from the crushed waste stone in the crushing step, and a secondary sorting step (130) of separating the large soil having a particle size of a predetermined standard size or more from the waste rock after the primary sorting step And a mixing step (150) in which the additives for solidification and the pH adjusting agent are added to and mixed with the result of separating large soil having a particle size of a predetermined reference size or larger in the secondary sorting step.

Description

TECHNICAL FIELD [0001] The present invention relates to a method for manufacturing a fire-extinguishing composition,

More particularly, the present invention relates to a method for manufacturing a fire-fighting gypsum, in particular, a recycling rate of phosphogypsum generated in various industrial fields, .

The amount of waste generated in various industrial fields reaches several million tons a year. Porphyry is a gypsum of phosphorus acid produced from phosphoric acid fertilizer manufacturing process (SO ₄ ^{2 -} is generated by phosphoric acid substitution when phosphoric acid is extracted from phosphoric acid), desulfurization gypsum generated from petrochemical and thermal power plant desulfurization process, , Titanium gypsum produced in the titanium manufacturing process, and polychlorinated aluminum (PAC) gypsum. Among them, phosphate gypsum produced in the phosphoric acid fertilizer manufacturing process occupies a large portion. In this way, industrial waste is being recycled and buried in landfills without any special treatment.

In the civil engineering field of waste scraps, it is used as embankment and landfill materials, as a material for roads, as a soft ground and as a ground stabilizing material, mixed with limestone at a certain ratio, It is set to be utilized as a coastal water surface reclamation material.

Also, an example of utilizing waste scoria for solidification of coastal clay and soft ground is disclosed in Korean Patent Publication No. 10-2005-0024754 (published March 11, 2005). In the above document, a clay having a high water content is solidified in a short time in the construction of a coastal area composed of a soft clay by using a mixed material obtained by mixing a waste stone and a cement at a suitable ratio in a chemical factory in a short time, To thereby stabilize it.

However, in the various applications of the waste slag, various additional problems may be brought about when used in such a state without any special treatment for preventing environmental pollution.

That is, waste scraps contain contaminants such as heavy metals. When waste scraps are discharged and recycled, they contain many metal objects such as bolts, nuts, steel bars, and impurities such as vinyl, There are many restrictions. Particularly, when recycled for use in a shared water surface, there is a problem that environmental pollution may be caused when the water is used for landfill without any special treatment.

Accordingly, there is a need in the art for a method for solving these problems and for recycling waste scraps.

Korean Patent Publication No. 10-2005-0024754 (published March 11, 2005)

The problem to be solved by the present invention is to provide a waste stone for reclamation in the state of separating various magnetic objects and heavy metals or other foreign substances from the waste stone and then adding additives and pH adjusting chemicals for solidification, Which can be used as a common reclamation land and can be cost-reduced by using waste plaster which is more economical than other reclaimed land.

According to an aspect of the present invention, there is provided a method of manufacturing a solid-state fire to utilize a waste rock as a co-surface reclaimed land, comprising: a magnetic force selecting step (110) of sorting a magnetic object included in a waste rock by using a magnetic force; A crushing step (120) of crushing a waste rock selected from the magnetic material using a crusher, a primary sorting step (130) of separating a low specific gravity material from the crushed waste stone in the crushing step, A secondary screening step 140 for separating large sandstones having a particle size of a predetermined reference size or larger from the waste rocks of the sandstone of the predetermined size, And a mixing step 150 for adding and mixing an additive and a pH adjusting agent.

According to one embodiment, the pH adjusting agent is an alkaline substance, which may be sodium hydroxide.

According to one embodiment, the additive for solidification comprises flyash and aluminum sulphate (Al ₂ (SO ₄ ) ₃ ).

According to one embodiment, the low specific gravity material in the primary sorting step 130 is vinyl, dust, or heavy metal microparticles.

According to one embodiment, the primary sorting step 130 may include the steps of blowing air to the side of the crushed waste stone using the air classifier in the crushing step 120, and loading the crushed waste stone in the crushing step 120 a step of suctioning the low specific gravity material scattered by the step of blowing and the step of oscillating by using a suction hopper and a suction pump, Lt; RTI ID = 0.0 > collection < / RTI >

The present invention provides a method of manufacturing a fire-resistant quarry which can utilize a waste rock as a shared water surface reclamation, thereby increasing the recycling rate of the waste rock and providing a fire in a state where various magnetic objects and heavy metals or other foreign substances are separated from the waste rock It is possible to reduce the cause of environmental pollution, and it is possible to reduce the cost by using waste plaster that is more economical than other landfills.

FIG. 1 is a view for explaining the entire flow of a fire-fighting method for utilizing waste scoria as a common surface litter according to an embodiment of the present invention,
Figure 2 is a block diagram of the entire flow of the solidification method of Figure 1,
FIG. 3 is a block diagram illustrating specific sub-steps 130a, 130b, 130c and 130d in the primary selection step 130 of FIG.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. It is noted that the accompanying drawings and the embodiments described herein are simplified and illustrated to enable those skilled in the art to readily understand the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view for explaining an overall flow of a solid fire preparation method for utilizing waste plaster as a common surface litter according to an embodiment of the present invention, and FIG. 2 is a block diagram And FIG. 3 is a block diagram illustrating specific sub-steps 130a, 130b, 130c, and 130d in the primary sorting step 130 of FIG.

Referring to Figs. 1 to 3 together, a method for manufacturing a fire extinguishing agent for utilizing waste plaster as a common surface litter is first preceded by preparing a waste plaster. As mentioned above, the waste plaster is a plaster of Phosphate gypsum, desulfurization gypsum, smelting gypsum, titanium gypsum, polychlorinated aluminum gypsum, or the gypsum plaster from the landfill. In addition, efforts have been made to utilize the waste rock as a common water-based reclamation material. However, it has been attempted to utilize waste metal such as vinyl-containing impurities, magnetic metal objects such as bolts and nut bars, And heavy metals. Therefore, it is very likely to be polluted by leaching of heavy metals when used as a water surface material. Accordingly, the present invention provides a method for manufacturing a fireproofing material which can be utilized as a material for a water surface buried under the process of treating such waste rock.

Next, magnetic metal objects such as bolts, nuts, steel bars and the like may be mixed together in the prepared waste screeds. That is, the magnetic material contained in the waste slag is sorted using a magnetic separator (step 110).

Next, a crushing step 120 is carried out in which the crushed waste stone is crushed using a jaw crusher. As a crusher, a known crusher can be used. Generally, a waste stone is put between two jaws and a moving plate, and moves like a jaw to crush the waste rock by its compressive force. In addition, the size of the crusher is determined according to the size of the tank, and the size of the discharged material can be adjusted by adjusting the distance between the stationary tank and the lower portion of the moving tank.

Next, the pulverized scrape through the scouring step 120 is subjected to a primary screening step 130 for separating the low specific gravity material from the waste scraper. In the case of low specific gravity materials separated from waste rock, vinyl, dust, and heavy metals contained in fine grains are separated from crushed waste scraps. 3, in the primary sorting step 130, the pulverized pulverized coal is loaded into the primary separator in the pulverization step 120, and the pulverized coal is blown to the waste rock by using the blower 132 (130a) causing the low specific gravity material and the heavy metal fine particles to scatter, and a low specific gravity material such as the low specific gravity material and the heavy metal fine grains to be scattered to help suction of the suction hopper (136) (130b) using a diaphragm (134) so as to separate the low specific gravity materials mixed in the suction hopper (136) by a combination of a blowing step and a vibrating step, And a low specific gravity material collecting step of collecting the low specific gravity material sucked through the suction hopper 136 into the collection box 139 via the suction pipe 137 (step 130c) 13 0d). By passing through the primary sorting step 130, low specific gravity materials such as vinyl, heavy metal fine particles and the like are removed from the waste rock.

Examples of the heavy metal contained in the fine particles include copper (Cu), zinc (Zn), cadmium (Cd), lead (Pb), arsenic (As), chromium (Cr), mercury (Hg) And so on. Copper (Cu) is almost atomic number 29 but it accumulates excessively, it affects brain, liver and kidney function. Zinc (Zn) is atomic number 30 and is familiar as a cathode material of battery. However, Cd is a very toxic metal with atomic number 48. If it is poisoned, it causes illness, lead (Pb) is poisoned with atomic number 82, (As) is a very toxic substance with an atomic number of 33. It is a substance which is nauseous, vomiting, nervousness, nausea, vomiting, nausea, vomiting, Chromium (Cr), when contacted by atomic number 24, causes local symptoms such as burns, nausea and necrosis, and coughing and pulmonary symptoms when inhaled. Mercury (Hg) is poisoned by atomic number 80 Risk of Is high, such as intoxication appears when blossomed over the nervous system, language disorders, movement disorders, cyanide (CN) can lead to systemic vaginal symptoms by inhibiting the lungs or the like is absorbed in hemoglobin enzyme acts in the oxygen 112 times. like this. Various heavy metal fine particles contained together in the waste slag are filtered in the primary sorting step 130. Therefore, when the waste plaster is left in the landfill, the removal of the heavy metals is a very important task. Therefore, it is necessary to constantly measure the leachate using a heavy metal measuring instrument. A heavy metal measuring instrument may be used.

Next, a secondary sorting step 140 is carried out to separate large sandstones having a particle size of a predetermined reference size or larger from the waste rock after the primary sorting step 130. The secondary sorting step 140 proceeds by screen 142 to screen out the scum particles having a particle size on the order of coarse sand. The waste plaster particles pass downward (indicated by the arrow 145 as they pass downwardly through the screen) by the screen 142 and the remaining gravels are collected in a separate large gravel collector 149. Large gravels can be, for example, stones or scraps of a predetermined size or greater, or impurities of large particles that have not been removed in the magnetic separation stage 110 and the primary sorting stage 130.

Subsequently, after the secondary sorting step 140, large soil with a particle size of a predetermined reference size or larger is separated from the resultant, that is, a reclaimed waste rock (CaSO ₄ , presently having no large particle size) (Hereinafter also referred to as anhydrous calcium sulfate) is secured, an additive is further added to the mixture to be finally solidified and mixed in the mixing bath 150, and in addition, 150 are sprayed with an alkaline substance using a shower 155 and mixed. In the description, 150 is used as a reference to the mixing tank 150, but reference numeral 150 is also referred to as a mixing stage.

The alkaline substance may be, for example, sodium hydroxide or the like, but is not limited thereto. In particular, excavated waste rocks are often strongly acidic, so it is desirable to use alkaline materials to neutralize them. And the additive added for solidification can be, for example, flyash and aluminum sulfate (Al ₂ (SO ₄ ) ₃ ) as a coagulant. The blending ratio of waste rock, fly ash and aluminum sulfate can be adjusted through experimentation as needed according to circumstances, that is, the powder of the waste rock, the ratio of the soil included in the waste rock, etc., . Flyash is generally a by-product of coal-fired power plants. Coal is made into powder from coal-fired plants such as coal-fired power plants. In this case, it remains in a fine dust state containing silicon dioxide (SiO ₂ ) or aluminum oxide (Al ₂ O ₃ ) The fly ash was collected. When fly ash is added, advantages such as resistance to sulfates, that is, aluminum sulfate (Al ₂ (SO ₄ ) ₃ ), and watertightness of a fire are improved.

In the case of manufacturing firefighting from waste rocks through the above steps, it is advantageous to separate the heavy metals from the waste rock so that the problem of environmental pollution can be reduced when used as a common reclaimed landfill, There is an advantage in that the cost can be greatly reduced when compared.

As mentioned above, waste rock is used as a landfill material, a road material, and as a ground stabilizing material for soft ground in the civil engineering field, and it is regulated that inland wastes are used as construction materials However, since it is already legally used to utilize it as a shared reclamation material, it is possible to create a large-scale industrial complex through a shared landfill for the purpose of efficient utilization of the restricted land and expansion of the lacking industrial complex. Particularly, according to the indoor and field test results, the strength of the gypsum lime stabilized soil mixed with 1: 1 and 1: 2 of gypsum and lime in the room test was found to be higher than that of ettringites and internal pressure , Which is much higher than that of lime itself. Also, gypsumlime columns showed better results in field tests than lime columns. As described above, the waste scoria can be utilized variously as a landfill material or as a stable material for a soft ground, and when utilized in a state where various pollutants are removed according to the present invention, it can contribute to prevention of environmental pollution, Cost savings can be achieved by using economical waste scrap.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it should be understood that the spirit and scope of the present invention are defined by the interpretation of the following claims . In addition, those of ordinary skill in the art will be able to derive any number of other variations that fall within the equivalents of the invention based on the matters described herein, and that are also within the spirit and scope of the present invention It should be noted that it belongs.

110: magnetic force selection step
120: crushing step
130: primary selection step
140: secondary selection step
150: mixing tank, mixing step
132: blower 134: diaphragm
136: suction hopper 137: suction pipe
138: Suction pump 139: Collection box
142: Screen 145: Mortar for landfill
155: Shower

Claims (5)

A method for manufacturing a fire-fighting flue for use as a shared sleeping land,
Preparing a waste rock slab by crushing the waste slag buried in the landfill;
A magnetic force selecting step (110) of sorting the magnetic objects included in the waste rock by using a magnetic force;
A crushing step (120) of crushing waste stones having magnetic objects selected using a crusher;
A primary sorting step (130) of separating vinyl, dust, and low specific gravity materials, which are fine particles, from the crushed waste stone in the crushing step;
A secondary sorting step (140) for separating large sandstones having a particle size of a predetermined reference size or larger from a waste rock after the primary sorting step by a screen; And
In the secondary sorting step, fly ash for adding solidification and aluminum sulfate (Al ₂ (SO ₂ (SO ₃ ) ₂ ), which are additives for solidification, ₄ ) ₃ ) and a mixing step (150) in which an alkaline substance, which is a pH adjusting agent, is added using a shower and mixed in a mixing tank,
The primary selection step (130)
A step 130a for discharging the low specific gravity material by blowing the pulverized stone powder in the crushing stage 120 into the primary separator by using a blower to blow it to the waste stone side, (130b) using a diaphragm to make the low specific gravity material mixed in the crushed waste stone better separated, and a low specific gravity scattered by a combination of the blowing step and the vibrating step (130c) of sucking the material using a suction hopper and a suction pump, and a low specific gravity material collecting step (130d) for collecting the low specific gravity material sucked through the suction hopper into the collection box via the suction pipe A method for manufacturing a fireproofing material. delete delete delete delete

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