TWI400134B - Method for fabricating light aggregate using porcelain tile sludge and reservoir sediment - Google Patents

Description

The method of preparing lightweight aggregates with quartz brick grinding sludge and reservoir sludge law

The invention relates to the technical field of waste brick recycling and utilization of quartz brick grinding sludge and reservoir sediment, and more specifically, the utility model utilizes the characteristics of quartz brick grinding sludge and reservoir sediment to make lightweight aggregate material. Reuse technology, the production and application of lightweight lightweight aggregates.

The quartz brick grinding process of the tile factory will produce a large amount of sludge. The sludge enters the wastewater treatment plant and is used as a waste sludge cake after being treated as a waste sludge cake by coagulation, sedimentation and sludge dewatering. Covering the soil is a waste of resources. The main reason for the difficulty in reusing quartz brick grinding sludge is the coagulation agent/coagulant/conditioner added to the dirty powder and the particles and components of the abrasive disc, the wastewater treatment and sludge dewatering.

In addition, in the case of reservoir silt, since the reservoir silt directly affects the effective water storage capacity of the reservoir, the competent authority will take the necessary accumulation of sludge accumulation status. The mud excavated by cockroaches is mostly natural clay, fine sand, and contains organic matter, so it can be used for making red bricks, land improvement, flower cultivation, etc. In recent years, there are also those who make slag sludge into lightweight aggregates.

There are many related technologies related to quartz brick grinding sludge or / and reservoir sludge made of lightweight aggregates, such as the Republic of China Invention No. 289016 "Manufacturing Method of Lightweight Aggregate" (by fly ash, magnesium oxide curing agent) , modifier, blender, stabilizer, etc.), 280343 No. "Lightweight Building Bone" (for hollow skeletons for construction and built-in lightweight filling materials), No. 177808 "Manufacturing method for cold-bonded fly ash lightweight aggregates" (by fly ash, bottom ash, water) Quenching stone, river sand plus binder, binder vapor cold junction), No. 200934594 "Sewage sludge and tile polishing ash mixed sintered body and its lightweight aggregate method" (will be sewage sludge Mixed with ceramic tile ash ash, No. 200930678 "Manufacturing method of lightweight aggregates" (mixed with reservoir sludge and solid waste, sintered with molten layer), No. 200909376 Method for remanufacturing lightweight aggregates from waste incineration fly ash resources" (flying ash and strontium aluminate granulated and then fired in rotary kiln), No. 200909377 "Method for producing high-performance silt lightweight aggregate" (with reservoir sludge) Patent case including addition of niobium carbide additive, granulation and firing in a rotary kiln).

Recycling of waste quartz brick grinding sludge and reservoir sludge to produce valuable lightweight aggregates not only reduces the exploitation of raw materials, protects the global environment, but also achieves the goal of zero waste and resource reuse. The benefits are more than enough. However, there are no patents related to the production of lightweight aggregates by quartz brick grinding sludge and reservoir sludge.

The main object of the present invention is to provide a method for preparing lightweight aggregates by using quartz brick grinding sludge and reservoir sludge, which can make the quartz brick grinding sludge generated by the tile factory and the sludge excavated by the reservoir to be made light. Bone material for reuse, achieving "zero waste" and "recycling resources" The ideal environmental purpose.

The method for producing the lightweight aggregate material for the quartz brick grinding sludge and the reservoir sludge provided by the present invention comprises at least the following steps: sieving: separating the quartz brick grinding sludge and the reservoir sludge Screening, separation into coarse mud and fine mud; mixing: mixing the quartz brick grinding sludge and the reservoir sludge belonging to the fine mud in appropriate proportion; ball milling: ball milling the mixed fine mud; forming: forming the ball-milled mixture into an embryo Body; high temperature firing: The embryo body is fired into a lightweight aggregate at a high temperature.

In the following, a preferred embodiment of the present invention will be further described in detail with reference to the following drawings: a preferred embodiment of the present invention is a method for making lightweight aggregates using quartz brick grinding sludge and reservoir sludge. The first step is drying and crushing 110: the quartz brick grinding sludge and the reservoir sludge are separately heated and removed at a temperature of about 105 ° C, and then crushed by a conventional crusher.

The second step of the present invention is to screen 120: the quartz brick grinding sludge and the reservoir sludge are sieved by a rotary sieve or a vibrating sieve having a pore size of 75 μm (ASTM #200), and separated into coarse mud and fine mud.

The third step of the present invention is to mix 130: will belong to the stone of fine mud The British brick grinding sludge is mixed with the fine mud of the reservoir sludge at a weight ratio of 10-30% by weight.

The fourth step of the present invention is a ball mill 140: the finely mixed mud is ball-milled, and the ratio of water to fine mud of the ball mill is 1.5-3.0:1 for at least 4 hours.

The fifth step of the present invention is to form 150: the ball milled mixture is formed into an embryo body by spray granulation-molding, or dehydration-extrusion or dehydration-granulation.

Among them, the method of spray granulation-compression molding is as follows: the method of spray granulation 151 is to use a conventional spray granulator to form a ball-milled mixture into particles having a particle diameter of less than 0.5 mm (ASTM #35), and a stamper. The method of molding 152 is to press the granulated pellets into an embryo body by a conventional molding machine at a pressure of 200 to 400 kgf/cm ² . The shape of the embryo body may be a cylinder, a cube, a rectangular parallelepiped, and the maximum height thereof is not more than 2.0 cm, and the maximum height and width (the diameter of the cylinder is the diameter, and the length of the long side of the rectangular parallelepiped) is not more than 2 times.

The method of dehydration-extrusion molding is as follows: the method of dehydration 153 is to dewater the ball-milled fine mud into a mud cake by means of pressure filtration, vacuum filtration or centrifugation, and the mud cake is then subjected to vacuum mixing 154, and then extruded and extruded. The method of forming 155 is to extrude the mud strip and cut into the embryo body by a conventional extrusion molding machine, and the shape of the embryo body may be a cylinder, a cube, a rectangular parallelepiped, and the maximum height thereof is not more than 2.0 cm, and the maximum height and width (column) The body is the diameter and the cuboid is the The length of the long side is less than 2 times.

The dehydration-granulation molding method is as follows: the dehydration 156 is in the same manner as described above, and the dewatering method after the ball mill is dehydrated into a mud cake by a dehydration method such as pressure filtration, vacuum filtration or centrifugation, and the mud cake is granulated by vacuum kneading 157. The granulation molding 158 is formed by a conventional granulator to form a spherical body having a diameter of not more than 2.0 cm.

The final step of the present invention is high temperature firing 160: the formed embryo body is sintered to a temperature of 112-180 ° C at a heating rate of 1.5-4.5 ° C / min, and then naturally cooled to produce a lightweight aggregate.

In this way, the lightweight aggregate can be used for construction. It is completely made of quartz brick grinding sludge and reservoir sludge. It does not need to add other raw materials, which can reduce the exploitation of raw materials and protect the global environment. It achieves the goal of zero waste and resource reuse. Therefore, it is an environmental innovation method of “zero waste” and “resource reuse”. The reason is that the invention does meet the requirements of the invention patent and submits an application according to law.

110‧‧‧Drying and breaking

120‧‧‧Screening

130‧‧‧ mixed

140‧‧‧ ball mill

150‧‧‧Forming

151‧‧‧Spray granulation

152‧‧‧Compression molding

153‧‧ dehydration

154‧‧‧vacuum mixing

155‧‧‧Extrusion

156‧‧‧ dehydration

157‧‧‧vacuum mixing

158‧‧‧granulation molding

160‧‧‧High temperature firing

1 is a flow chart of a preferred embodiment of the present invention.

Figure 2 is a partial flow chart of a preferred embodiment of the present invention.

110‧‧‧Drying and breaking

120‧‧‧Screening

130‧‧‧ mixed

140‧‧‧ ball mill

150‧‧‧Forming

160‧‧‧High temperature firing

Claims (5)

A method for preparing lightweight aggregates by using quartz brick grinding sludge and reservoir sludge, comprising at least the following steps: sieving: grinding quartz sludge with a rotary sieve or vibrating sieve having a pore size of 75 micrometers (ASTM #200) The silt of the reservoir is separately screened and separated into coarse mud and fine mud; mixing: the quartz brick grinding sludge and the reservoir sludge belonging to the fine mud are mixed according to an appropriate ratio; the ball mill: the mixed fine mud is ball milled; molding: after the ball is ground The mixture is formed into an embryo body; high temperature firing: the formed embryo body is fired into a lightweight aggregate at a high temperature. A method for preparing lightweight aggregates by using quartz brick grinding sludge and reservoir sludge, comprising at least the following steps: sieving: sifting quartz brick grinding sludge and reservoir sludge separately into coarse mud and fine mud; mixing: The quartz brick grinding sludge belonging to the fine mud is mixed with the fine mud by the dry weight ratio of 10-30wt%; the ball milling: the mixed fine mud is ball-milled; the molding: the ball milled mixture is formed into the embryo body; the high temperature firing : The formed embryo body is fired into a lightweight aggregate at a high temperature. A method for preparing lightweight aggregates by using quartz brick grinding sludge and reservoir sludge, comprising at least the following steps: sieving: sifting quartz brick grinding sludge and reservoir sludge separately, Separated into coarse mud and fine mud; mixed: the quartz brick grinding sludge and the reservoir sludge belonging to the fine mud are mixed according to an appropriate ratio; ball milling: the finely mixed mud is ball milled, and the ratio of the ball milled water to the fine mud is 1.5. -3.0:1, at least 4 hours; molding: forming the mixture after ball milling into an embryo body; firing at a high temperature: firing the formed embryo body at a high temperature to form a lightweight aggregate. A method for preparing lightweight aggregates by using quartz brick grinding sludge and reservoir sludge, comprising at least the following steps: sieving: sifting quartz brick grinding sludge and reservoir sludge separately into coarse mud and fine mud; mixing: The quartz brick grinding sludge and the reservoir sludge belonging to the fine mud are mixed according to an appropriate ratio; the ball milling: the mixed fine mud is ball-milled; the molding: forming the mixture into the embryo body by dehydration-extrusion molding, using the pressure filter Dewatering method such as vacuum filtration or centrifugation, dewatering the ball-milled fine mud into a mud cake, and then vacuum-mixing the mud cake, extruding the strips in an extrusion molding machine and cutting into the body; high temperature firing: molding The embryo body is then fired into a lightweight aggregate at a high temperature. A method for preparing lightweight aggregates by using quartz brick grinding sludge and reservoir sludge, comprising at least the following steps: sieving: separating quartz brick grinding sludge and reservoir sludge into coarse mud and fine mud; Mixing: mixing the quartz brick grinding sludge and the reservoir sludge belonging to the fine mud in an appropriate proportion; ball milling: ball milling the mixed fine mud; forming, forming the mixture into the embryo body by dehydration-granulation molding The ball-milled fine mud is dehydrated into a mud cake by means of pressure filtration, vacuum filtration or centrifugation, and the mud cake is then vacuum-mixed to form a spherical body with a granulator having a diameter of not more than 2.0. Centrifugal; high temperature firing: The shaped body body is fired into a lightweight aggregate at a high temperature.