CN1203895A

CN1203895A - Flyash, boron mud sintered brick and its making method

Info

Publication number: CN1203895A
Application number: CN97112663A
Authority: CN
Inventors: 张云桥; 孙宝琦; 赵景荣; 胡德川; 石维华
Original assignee: Angang Steel Co Ltd
Current assignee: Angang Steel Co Ltd
Priority date: 1997-06-28
Filing date: 1997-06-28
Publication date: 1999-01-06

Abstract

The present invention belongs to a new type building material-flyash and boron mud sintered brick. It is made up by using (wt%) 67%-90% of flyash and 10%-33% of boron mud through such processes of proporioning raw materials, mixing, pressing into form, drying and baking, and its heating value is controlled to 2926-3762 KJ/Kg. Its advantages are: it completely uses industrial waste slag, has no need of adding any adhesive, its production process is simple, cost is low, and its product strength is high and physical property is good.

Description

Flyash, borax mud sintered brick and manufacture method thereof

The present invention relates to a kind of industrial residue flyash, boric sludge of utilizing and make vitrified brick and method thereof, belong to building material field.

At present, civil building mostly adopts natural matters such as clay with brick, thereby a large amount of farmlands have been destroyed, make and to plough the farmland and reduce day by day, for this reason, many countries all adopt relative measures to be banned, actively seek new equivalent material, utilize industrial residue to become the new trend of various countries construction sector research, for example: use slag, boron mud, raw materials such as flyash are made various building bricks, it is main raw material brickmaking that the slag of employing is arranged, but because its insulation, the bad use that will be eliminated of energy-saving effect, the boron of employing mud is also arranged, flyash is main raw material, and for example Chinese patent 87101036 discloses the method that the above-mentioned two kinds of raw materials of a kind of usefulness add top binding agent manufacturing internal wall brick, though the internal wall brick technical indicator of this method manufacturing has reached building requirements, but complex manufacturing technology, the cost height, and the relative exterior wall tile of consumption is few, and the waste residue utilization rate is low.

The purpose of this invention is to provide a kind of 100% and utilize flyash, boron mud, do not use any binding agent, produce the intensity height, good physical performance, energy-conservation, production technique is simple, and cost is low is applicable to flyash, borax mud sintered brick and the manufacture method thereof that worker China Democratic National Construction Association uses.

Raw material of the present invention is made of flyash, boron mud, and according to the present invention, its raw material composition is: the weight percent of flyash is 67%～90%, and the weight percent of boron mud is 10%～33%.Calorific value is controlled at 2926～3762KJ/Kg.

According to vitrified brick manufacture craft of the present invention, adopt the half-dried method of forming or extrinsion pressing to make.The half-dried method of forming that the present invention proposes is that present technique field those of ordinary skill is known and used operation always, the general operations such as oven dry, batch mixing, moulding, drying, roasting that adopt, as the case may be if boron mud pellet degree is bigger, can before batching boron mud be dried, and sieve, its granularity is controlled at≤3mm, if boron mud pellet degree is little, can be directly and the flyash batch mixing, heavy-load bearing brick is made in extrusion forming then.

The extrinsion pressing that the present invention proposes is achieved in that

1, flyash and boron mud are prepared burden in proportion stir after, make its water content 20～22%,

2, above-mentioned compound being extruded brick pressing machine by vacuum, is 2.2～1.6MPa at extrusion pressure, vacuum tightness is-condition of 0.092MPa under extrusion molding, the pressure size depends on the water content of compound,

3, with the brick of above-mentioned extrusion molding, ventilative piling up on push trolley, send into the base dehydration of under 150 ℃ of temperature, wetting in the kiln, be 35～41 hours time of drying, after being≤3 to water content, roasting is 10～15 hours in 950～1050 ℃ high-temperature zone, promptly makes high strength high-quality vitrified brick after the cooling.

According to prescription of the present invention and made flyash, the borax mud sintered brick of manufacture craft, except that the general advantage that possesses clay brick, also have the following advantages:

1, making full use of industrial residue is raw material, turns waste into wealth, and has solved the occupation of land stacking and the problem of environmental pollution of flyash and boron mud;

2, without binding agent, manufacture craft is simple, the raw material abundance, and cheap, cost is low;

3, good energy-conserving effect because the materials main component of this vitrified brick is a flyash, is undertaken by himself containing carbon burning in roasting process, and the hot gas that roasting is emitted can enter again in the dry indoor wet base dehydration that is used for.

4, prepared vitrified brick intensity height, good physical performance, various technical indicators all meet or exceed the GB13544-92 standard, can do bearing wall and build by laying bricks or stones, are not only applicable to covil construction, and also are suitable for Industrial buildings usefulness.

According to the present invention, can select the processing parameter of different ratios of raw materials and compacting for use, can obtain best high-quality vitrified brick.

Embodiment 1:

Adopt the flyash in power station.The calorific value of its flyash is at 3334KJ/kg, adopting waste residue, the boron mud of boric acid factory is main raw material, 80: 20 by weight percentage, weigh batching flyash and boron mud, mixing and stirring, material moisture content is controlled at the 425t brick pressing machine that adopts Taiyuan Heavy Machinery factory to produce in 10～15% scopes and is pressed into shaped brick after mixing, ventilative sign indicating number is in kiln, the base that under 150 ℃ of temperature, wets dehydration, after being 1% to water content, roasting is 10 hours in 950～1050 ℃ of high-temperature zones, promptly makes the high-quality vitrified brick after the cooling.

Embodiment 2:

Adopt power plant fly ash, 70: 30 by weight percentage ratio is allotted the compound of flyash and boron mud, mixing and stirring, mix back material moisture content and be controlled at 20～22%, adopt Shuangyashan Dongfang Industry Co to produce JZK70/60-38 two-stage vacuum brick extruding machine, extrusion pressure is at 1.8MPa, vacuum tightness is-the 0.092MPa extrusion molding, pile up in kiln, drying is 40.5 hours under 150 ℃ of room temperatures, be dehydrated into 0.41%, firing cycle 72 hours, 950～1050 ℃ of high-temperature zone roastings 11 hours.

Above-mentioned two kinds of prescriptions and the basic mechanical design feature of method are got 35 bricks its result that tests:

Interventions Requested				Unit	Assay
					Assay						1	2	3	4	5	Result evaluation
					Intensity	Ultimate compression strength			MPa	19.8	1	2	3	4	5	Result evaluation	20.8	19.7	18.3	21.6	Mean value: 20.04 minimum value: 18.3
The loading of anti-folding			KN	15.5		Ultimate compression strength			MPa	19.8	14.9	18.9	21.0	14.9	Mean value: 17.0 minimum value: 14.9		20.8	19.7	18.3	21.6	Mean value: 20.04 minimum value: 18.3
The loading of anti-folding			KN	15.5		Physicals	Water-intake rate			％	14.9	18.9	21.0	14.9	Mean value: 17.0 minimum value: 14.9	12.3	12.2	11.7	12.3	12.0	Mean value: 12.1
Freeze thawing	Bursting by freezing length	Width	mm	Do not have	Do not have		Water-intake rate			％	Do not have	Do not have	Do not have	Qualified		12.3	12.2	11.7	12.3	12.0	Mean value: 12.1
		Width	mm	Do not have	Do not have		Length direction	mm	Do not have	Do not have	Do not have	Do not have	Do not have	Qualified	Do not have	Do not have	Do not have	Qualified
		The dry mass loss		％	0.13		Length direction	mm	Do not have	Do not have	0.17	0.19	0.31	0.27	Do not have	Do not have	Do not have	Qualified	Qualified
	Scum			％	0.13			Medium	Medium	Medium	0.17	0.19	0.31	0.27	Medium	Medium	Qualified		Qualified
Lime blowing					Do not have			Medium	Medium	Medium	Do not have	Do not have	Do not have	Do not have	Medium	Medium	Qualified	Qualified

This sample meets national GB13544 standard-required.

Claims

1, a kind of vitrified brick of being made up of flyash and boron mud is characterized in that, its raw material composition is: the weight percent of flyash is 67%～90%, and the weight percent of boron mud is 10%～33%, and calorific value is controlled at 2926～3762KJ/Kg.

2, a kind of manufacture method of making the described vitrified brick of claim 1 comprises operations such as oven dry, batching, batch mixing, moulding, drying, roasting, it is characterized in that,

1) batch mixing: with flyash and boron mud prepare burden according to the above ratio stir after, make its water content 20～22%,

2) moulding: above-mentioned compound is extruded brick pressing machine by vacuum, is 2.2～1.6MPa at extrusion pressure, vacuum tightness is-condition of 0.092MPa under, extrusion molding,

3) pile up on push trolley the brick of above-mentioned extrusion molding is ventilative, send in the kiln, the base that wet under 150 ℃ temperature dewaters, and be 35～41 hours time of drying, be≤3% to water content after, roasting is 10～15 hours in 950～1050 ℃ of high-temperature zones.

3, the manufacture method of vitrified brick according to claim 3 is characterized in that being to weigh up powder mix coal ash and boron mud at 70: 30 by weight percentage, and the calorific value of flyash is 3334KJ/Kg, by extrusion machine, and extrusion molding under 1.8MPa pressure.