KR20010095350A - Method for manufacturing a brick and bottom materials with fly ash - Google Patents

Abstract

PURPOSE: A method of manufacturing a brick using coal ash, which is generated in thermoelectric power plant, is provided to recycle waste coal ash as a raw material for brick. CONSTITUTION: The manufacture method of a brick comprises the steps of (i) mixing coal ash 15-30wt.%, kaoline powder 50-70wt.%, 5-10wt.% of clay with a particle size of less than 0.004mm, feldspar 15-30wt.%; (ii) after molding the mixture, calcining the molded mixture in a rotary kiln at 1160deg.C.

Description

METHODS FOR MANUFACTURING A BRICK AND BOTTOM MATERIALS WITH FLY ASH}

The present invention relates to a method of manufacturing bricks and flooring materials using coal ash, and more specifically, using coal ash, which is the industrial waste remaining after burning coal to generate power in a thermal power plant, bricks and full moon patterns and black spots may appear. It relates to a method for producing bricks and flooring using coal ash.

The method of producing bricks and flooring materials among general building materials is obtained by extruding clay and sand containing iron oxide well by vacuum pulverizer (referred to as 'holder'), cutting it to a certain size with wire or knife, and drying and Through the firing process, it is made into 210mm in length, 100mm in width and 61mm in thickness.

Drying is naturally dried in the room and daylight, or dried in a drying room using waste heat, and calcination is carried out at the temperature of 900-1,200 ° C in ascending kilns, ring kilns, and tunnel kilns.

In this case, ceramic products having different physical properties may be obtained according to the degree of heating at the time of firing, and red brick is obtained when the high temperature baking is performed with red clay as a main component.

It can also be glazed to make the surface more beautiful and less absorbent.

However, most of the conventional finish bricks have only one red color, and incomplete combustion of fuel is caused by incomplete combustion of fuel by partially supplying excessive fuel used to obtain the temperature for firing at the time of firing. The formation of pyrolytic carbon and reactions on the surface of the bricks, in particular reduction reactions, resulted in the so-called 'reduction firing', which causes black spots to appear, sometimes yielding beautiful bricks. It may be fired in a severe reducing salt by addition of black and the like to make black bricks by carbon deposition, and carbon and graphite may be added to the main material to produce the black color.

However, various methods such as those described above require additional chemical reactions or materials to be used to produce black color. In particular, the carbon and graphite are expensive materials, which leads to an increase in the manufacturing cost of bricks.

The present invention has been made in view of the above-described problems of the prior art, and is intended to solve this problem. The industrial waste charcoal material after being used for power generation in a coal-fired power plant is used as a material in a brick manufacturing process, and the surface of the brick is black. It is an object of the present invention to provide a method of manufacturing bricks and floorings using coal ash to enable arbitrary patterns of color to appear.

The above-mentioned object of the present invention is a coal ash powder in a ratio of 15%-30% kaolin powder 50%-70%, clay 5%-10%, feldspar 15%-30% after mixing and stirring the brick and flooring material after molding A tunnel set at 1,160 ° C. is achieved by firing in a kiln.

1 is a photograph of a brick and flooring showing an embodiment showing the full moon pattern and black spots according to the present invention.

Hereinafter, a preferred embodiment according to the present invention will be described in more detail on the basis of the composition table and the accompanying drawings of the present invention brick and flooring.

Composition of the inventors brick

Main material Weight ratio (%) Remarks kaoline 50%-70% Water content 30%-38% Clay 5%-10% Feldspar 15%-30% Coal ash 15%-30%

1 is a picture of a brick and flooring showing an embodiment showing the full moon pattern and black spots according to the present invention, the coal ash powder 15%-30% and the kaolin powder 50%-70% heat-resistant refractory material, the diameter of the particles When mixed dry grinding in the ratio of 5% -10% clay and 15% -30% aluminosilicate mineral feldspar less than 0.004㎜, moisture of kaolin with water content of 30% -38% is dissolved by the coal ash, and then it becomes The fired material, which is press-molded with the floor and the flooring, is loaded on the trolley on the rail and woven into a refractory brick, and gradually moves to the high temperature part in the preheating zone where the internal temperature is 300 ° C-400 ° C. It is fired by several burners producing a temperature of 1,160 ° C.

In the furnace, the temperature of 1,160 ° C is that the coal ash is firstly fired for thermal power generation, and thus the general firing temperature is lowered to 1,200 ° C. Is adjusted.

As described in detail above, the present invention uses the coal ash which is industrial waste as a material compared to the brick manufactured by the conventional method as a material to absorb the moisture of kaolin having a water content of 30%-38% to improve the molding capacity The primary firing is for thermal power generation, so the endothermic amount is low. Overall, the firing temperature of bricks and flooring materials is lowered, and the products with full moon patterns and black spots can be produced than the bricks and flooring materials manufactured by conventional materials.

In addition, applying the present invention provides the effect that the surface color of the brick and flooring material can exhibit the same beautiful color as the imported brick.

Claims (1)

In the tunnel kiln with the temperature set to 1,160 ℃ after mixing dry grinding and molding to brick and floor materials in the ratio of coal ash powder 15%-30%, kaolin powder 50%-70%, clay 5%-10%, feldspar 15%-30% Brick and flooring manufacturing method using the coal ash, characterized in that to be fired.