CN102765922A

CN102765922A - Fly ash brick

Info

Publication number: CN102765922A
Application number: CN2012101769375A
Authority: CN
Inventors: 余传芳
Original assignee: HEFEI DAYE NEW BUILDING MATERIALS CO Ltd
Current assignee: HEFEI DAYE NEW BUILDING MATERIALS CO Ltd
Priority date: 2012-05-31
Filing date: 2012-05-31
Publication date: 2012-11-07

Abstract

A fly ash brick belongs to the technical field of building material manufacturing. The fly ash brick comprises 50%-60% of fly ash, 18% of lime, 10% of cement, 0.1% of aluminum powder, 1.9% of gypsum and 10% -20% of water, and is produced from steps of: raw material processing and treatment, batching, mixing, molding by standing, slicing and high temperature and high pressure steam curing. The fly ash brick prepared by the invention has durability and frost resistance obviously superior to those of other bricks prepared by low pressure steam curing; besides, the fly ash brick prepared by the invention also has the advantages of light weight, good heat insulation effect, sound insulation, heat insulation, and fire resistance, etc.

Description

A kind of flyash brick

Technical field:

The present invention relates to material of construction manufacturing technology field, being specifically related to a kind of is the working method of the flyash brick of main raw material with flyash.

Background technology:

Flyash is to receive the thin ash of catching the flue gas behind coal combustion, and flyash is the main solid waste that the coal-burning power plant discharges.Flyash is one of bigger industrial residue of the current discharge capacity of China, and along with development of electric power industry, the flyash quantity discharged of coal-burning power plant increases year by year.A large amount of flyash does not add processing, will produce airborne dust, atmosphere pollution; If enter water system and can cause the river to silt up, and toxic chemical substance wherein also can work the mischief to human body and biology, so the processing of flyash and utilize problem to cause that people note widely.

The novel wall material that with the flyash brick is the energy-conserving and environment-protective of representative plays significant role handling on the flyash.Flyash brick is a main raw material with flyash, lime, and admixture proper amount of gypsum and aggregate prepare through stock, compression moulding, the solid flyash brick that high pressure or atmospheric steam curing form.Existing flyash brick is because the content of flyash is less, and the cement and lime equal size in the auxiliary material is higher, because the price of cement and lime is higher, has increased one-tenth virtually and has produced cost, and the phenomenon of be full of cracks occurred easily.

Summary of the invention:

Technical problem to be solved by this invention is to provide a kind of flyash brick, solves high, the ropy problem of the cost that exists in the prior art.

Technical problem to be solved by this invention adopts following technical scheme to realize:

A kind of flyash brick, form by following raw materials by weight percent:

Its preparation methods steps is following:

Step 1: the flyash soda desalination that the processing of raw material and processing: a. will obtain according to the aforementioned proportion computation weigh is also removed the impurity in the flyash;

B. the lime pulverizing powdering that computation weigh is obtained;

C. the aluminium powder that computation weigh is obtained stirs to be pulverized;

Step 2: the cement that raw material powder coal ash that step 1 is obtained and lime obtain with metering is sent into stirrer and is stirred, and in whipping process, adds aluminium powder and gypsum;

Step 3: the raw material that stirs being discharged on the moulding car, being transported to the room of the resting moulding of resting, is 2 hours between the quiet stopping time;

Step 4: the fragment of brick after the moulding is cut into the size that needs with large-scale cutting machine;

Step 5: the fragment of brick after will cutting is sent into steam-cured retort, HTHP maintenance moulding; Maintenance

Be divided into intensification, constant temperature, cooling three phases, the TRT is 2 hours, and constant temperature time is 8 hours, and constant temperature and pressure is between 10Mpa-11Mpa, and temperature fall time is 1.5 hours.

The invention has the beneficial effects as follows: through the steam-cured flyash brick that forms of HCS, its weather resistance, frost resistance obviously are superior to the fragment of brick that other low pressure steam curing forms; It also has advantages such as light weight, high insulating effect, acoustical and thermal, fire prevention antidetonation in addition.

Embodiment:

For technique means, creation characteristic that the present invention is realized, reach purpose and effect and be easy to understand and understand, below in conjunction with specific embodiment, further set forth the present invention.

Embodiment 1

A kind of flyash brick, process by following weight percent:

Its preparation methods steps is following:

At first take by weighing the flyash of 500kg, the soda desalination is also removed the impurity in the flyash, takes by weighing the lime of 180kg and it is ground into powdery; The cement that takes by weighing 1kg aluminium powder, 19kg gypsum and 100kg is subsequent use; Secondly with flyash, cement, lime, put into the water that stirrer adds 200kg and stir, whipping process becomes slowly to add aluminium powder and gypsum; Once more, the raw material that stirs is discharged on the moulding car, is transported to the chamber of resting moulding, and the temperature of resting is 50 ℃, and the time of resting is 100 minutes; Then, the fragment of brick after the moulding is cut into the specification of 240mm*115mm*53mm with large-scale cutting machine; At last, the fragment of brick after the cutting is sent into steam-cured retort, the steam-cured moulding of HTHP is sent into steam-cured retort, HTHP maintenance moulding with the fragment of brick after the cutting; Maintenance is divided into intensification, constant temperature, cooling three phases, and the TRT is 2 hours, and constant temperature time is 8 hours, and constant temperature and pressure is between 10Mpa-11Mpa, and temperature fall time is 1.5 hours.

Embodiment 2

At first take by weighing the flyash of 600kg, the soda desalination is also removed the impurity in the flyash, takes by weighing the lime of 180kg and it is ground into powdery; The cement that takes by weighing 1kg aluminium powder, 19kg gypsum and 100kg is subsequent use; Secondly with flyash, cement, lime, put into the water that stirrer adds 100kg and stir, whipping process becomes slowly to add aluminium powder and gypsum; Once more, the raw material that stirs is discharged on the moulding car, is transported to the chamber of resting moulding, and the temperature of resting is 55 ℃, and the time of resting is 120 minutes; Then, the fragment of brick after the moulding is cut into the specification of 240mm*115mm*53mm with large-scale cutting machine; At last, the fragment of brick after the cutting is sent into steam-cured retort, the steam-cured moulding of HTHP is sent into steam-cured retort, HTHP maintenance moulding with the fragment of brick after the cutting; Maintenance is divided into intensification, constant temperature, cooling three phases, and the TRT is 2 hours, and constant temperature time is 8 hours, and constant temperature and pressure is between 10Mpa-11Mpa, and temperature fall time is 1.5 hours.

More than show and described ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; The present invention is not restricted to the described embodiments; That describes in the foregoing description and the specification sheets just explains principle of the present invention; Under the prerequisite that does not break away from spirit and scope of the invention, the present invention also has various changes and modifications, and these variations and improvement all fall in the scope of the invention that requires protection.The present invention requires protection domain to be defined by appending claims and equivalent thereof.

Claims

1. flyash brick, it is characterized in that: the raw material by following weight percent silk is formed:

Its preparation methods steps is following:

B. the lime pulverizing powdering that computation weigh is obtained;

Step 3: the raw material that stirs is discharged on the moulding car, is transported to the chamber of resting moulding, the temperature of resting is greater than 40 ℃; The time of resting is between 90min-120min;