CN102491724B - Iron ore slag sintered brick and a preparation technology of same - Google Patents
Iron ore slag sintered brick and a preparation technology of same Download PDFInfo
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- CN102491724B CN102491724B CN2011103580912A CN201110358091A CN102491724B CN 102491724 B CN102491724 B CN 102491724B CN 2011103580912 A CN2011103580912 A CN 2011103580912A CN 201110358091 A CN201110358091 A CN 201110358091A CN 102491724 B CN102491724 B CN 102491724B
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
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Abstract
The invention relates to a sintered brick, in particular to a sintered brick made of iron ore slag and a preparation technology of the sintered brick. The sintering raw material of the iron ore slag sintered brick comprises the components by bone dry weight as follows: 28 to 36 portions of iron ore slag, 27.6 to 41.4 portions of coal gangue or 25.5 to 38.25 portions of coal slag, 20 to 30 portions of silt and 5 to 15 portions of clinker. The iron ore slag sintered brick provided by the invention has the advantages that the source of raw materials is ample, waste iron ore slag is recycled, soil resources are saved, cultivated lands are protected, waste iron ore slag that can be obtained on a large scale and is of great quantity is fully utilized, the waste is changed into valuable, and the environment is purified. The obtained iron ore slag sintered brick has the effects of heat preservation, thermal insulation shock resistance and pressure resistance; and peeling and distortion are avoided, breakage or explosion does not occur easily, the yield can reach over 99%, and the sintered brick is suitable for industrial production and can be widely used as wall bricks of buildings.
Description
Technical field
The present invention relates to a kind of vitrified brick, be specifically related to a kind of vitrified brick and preparation technology thereof who utilizes the iron ore slag to make.
Background technology
The Iron Mine cinder ladle is drawn together two classes, and a class refers to the slag of blast furnace ironmaking melting when quenching, has little time crystallization and the vitreous state byproduct that forms, is fine-grannular or Powdered; Another kind of is the residual ground-slag behind the extraction iron behind the Iron Ore grinding, and this type of iron ore slag is the iron ore waste before the blast furnace ironmaking melting, and what the present invention adopted is Equations of The Second Kind Iron Mine ground-slag.
Because its component concentration of iron ore in the different places of production is not quite similar, the composition very complex of the iron ore slag that therefore produces, although in the prior art the someone utilize the iron ore slag, but generally be that the iron ore slag is carried out certain physical treatment and chemical treatment, make it meet specific requirement, a large amount of human and material resources in treating processes, have been expended, especially expend a large amount of energy, and further having produced again the secondary waste thing, the secondary waste thing that produces is difficult to dispose or utilize more.
A large amount of resources has not only been wasted in the discarded stacking of iron ore slag, and the iron ore slag has also produced serious secondary pollution to environment.How clearing up and dispose the discarded iron ore slag of stacking has become the common problems of concern of various circles of society, how effectively, suit measures to local conditions, recycle iron ore slag has great importance to resource recycling, suggestion conservation-minded society.
Along with the fast development of China's capital construction, the demand of building brick is also increasing.Originally the traditional brick-making technology of China is to utilize vitrified bond brickmaking, because it need to plough in a large amount of diggings, basic farmland is caused a large amount of destruction, and country prohibites and produces and use clay solid brick, limit production and use porous clay brick.Therefore some Bricks and Tiles Plants are faced with the Predicament of Development of shortage of raw materials.Utilize iron ore slag instead of clay, produce vitrified brick, not only can avoid it to the secondary pollution of environment, help to process the iron ore slag waste that iron ore production produces, and can realize the Sustainable development of Bricks and Tiles Plant.But, because the performance of iron ore slag and component thereof are extremely complicated, the cracked or explosion of very appearance when making vitrified brick, so the sintering difficulty is large, is difficult to make the vitrified brick that meets building performance and industrialized requirement in the prior art.
Summary of the invention
The purpose of this invention is to provide a kind of iron ore fired slag brick and preparation technology thereof.
Iron ore fired slag brick of the present invention, its raw materials for sintering by oven dry weight, comprises the component of following weight part:
Iron ore slag 28-36 weight part;
Coal gangue 27.6-41.4 weight part or cinder 25.5-38.25 weight part;
Mud 15-22.5 weight part;
Grog 5-15 weight part.
Described over dry refers to that the water ratio of component is 0.Water ratio of the present invention refers to that moisture content accounts for the ratio of gross weight.
Described iron ore slag is the residual Iron Mine ground-slag waste behind the extraction iron behind the Iron Ore grinding, this type of iron ore slag is the iron ore waste before the blast furnace ironmaking melting, be Powdered, its water content is generally about 20%, can make after drying its water content is 13-18%, as adopting the Iron Mine ground-slag waste of Hefei Lujiang County.For obtaining the satisfactory iron ore slag of water ratio, the iron ore slag can be added water, oven dry or the iron ore slag blending use higher with water ratio.
Better, the particle diameter of described iron ore slag is 0.1-0.3mm, the Iron Mine ground-slag that meets granularity can directly use, and also can adopt slag milling method conventional in the prior art to obtain slag particle or the slag powders of required particle diameter.
Described mud is riverway sludge.Riverway sludge is through ageing, dehydrates the viscosity mud of processing.Better, the water content of described mud is 13-18%.For obtaining satisfactory mud, riverway sludge and the blending of riverway sludge dry powder can be used.Riverway sludge dry powder then refer to the further drying and dehydrating of riverway sludge to water ratio less than 5%.
Described grog is that the useless brick that produces in the obtainable vitrified brick process in the prior art is the grinding material of 0.1-3mm through grinding acquisition particle diameter, also can be that the useless brick that produces in the iron ore slag sintering process of the present invention is the grinding material of 0.1-3mm through grinding acquisition particle diameter.
Described coal gangue, cinder and grog all can obtain through grinding the powder of required particle diameter.
Better, the particle diameter of described coal gangue, cinder and grog is 0.1-3mm; Preferably, the particle diameter of described coal gangue, cinder and grog is 0.1-0.3mm.
In the raw materials for sintering of iron ore fired slag brick of the present invention, can add entry or dry to regulate its water ratio.
Better, above-mentioned iron ore fired slag brick is perforated brick.
The preparation method of iron ore fired slag brick of the present invention comprises the following steps:
(1), be 13-18% with iron ore slag drying and dewatering to water content;
(2), with the mud ageing, dehydrate to water content be 13-18%;
(3), coal gangue, cinder and chamotte powder are milled to particle diameter and are 0.1-3mm;
(4), each raw material that will handle well according to proportioning mixes ageing 5-7 days;
(5), the vitrified brick moulding, drying, kiln discharge makes after the tunnel furnace roasting.
Better, in the step (3), the oven dry of described iron ore slag can adopt nature to dry or the mode of artificial drying.
Better, in the step (4), the water content of the mixture of described ageing is controlled to be 13-18%.
Better, in the step (5), adopt the semihard extruding during described vitrified brick moulding, and the pressure-controlling of semihard extruding is 2.1-2.4MPa.
In the step (5), the temperature of described tunnel furnace roasting is controlled to be 950-1050 ℃, and roasting time is generally 6-8 hour.
In the step (5), adopt the mode that steadily heats up during described roasting, temperature rise rate is controlled to be 2-4 ℃/min; Rate of temperature fall after the described roasting is controlled to be 1-3 ℃/min.
The Iron Mine ground-slag material that iron ore fired slag brick of the present invention utilization is discarded is as raw material, need not and carry out other physical or chemical treatment outward, when roasting, the temperature difference of its intensification and cooling can not be too large, keep its temperature rise rate and rate of temperature fall steadily, can well solve the phenomenon of the vitrified brick explosion that temperature variation brings; By the water content of control ageing mixture, the heating-cooling speed when the pressure size of the semihard extruding that the moulding of control vitrified brick is adopted and roasting and the temperature and time of roasting have obtained the iron ore fired slag brick of excellent property.
Iron ore slag baked brick raw materials of the present invention source is wide, make waste iron ore slag resource utilization, saved land resources, protected the arable land, takes full advantage of various lots of iron ore slag waste, turns waste into wealth and purified environment.The iron ore fired slag brick heat insulating that obtains, the antidetonation resistance to compression, non-friable without decortication or the sound of making mute, be difficult for explosion, yield rate can be fit to the large production of industry up to more than 99%, can be widely used as wall body brick for building.
Description of drawings
Preparation technology's schema of Fig. 1 iron ore fired slag brick
Fig. 2 iron ore slag porous baked brick synoptic diagram
Embodiment
Below enumerate specific examples with further elaboration the present invention, should be understood that example is not for restriction protection scope of the present invention.
Iron ore slag baked brick raw materials by oven dry weight, comprises the component of following weight part:
Iron ore slag 32 weight parts;
Coal gangue 32.2 weight parts;
Mud 21 weight parts;
Grog 8 weight parts;
Above-mentioned iron ore slag, coal gangue, grog are powder, and its particle diameter is 0.1-0.3mm.The iron ore slag of present embodiment derives from the Iron Mine ground-slag waste that Lujiang, Anhui produces.
The preparation method of iron ore fired slag brick (process flow sheet as shown in Figure 1, the machine that wherein adopts are conventional equipment of the prior art) is:
Be that 30% iron ore slag drying and dewatering to water content is 13-18% with water content; Coal gangue and chamotte powder are milled to particle diameter are 0.1-0.3mm; The riverway sludge that with water content is 25%-40% is 13-18% through ageing, dewatered drying to water ratio; According to proportioning coal gangue, riverway sludge and grog being added the water ratio that mixes and add water adjustment mixture in the iron ore slag together is 13-18%, ageing 7 days.After the ageing, fully stir, the twin rollers roll extrusion is broken, the brick extruding machine extruding is agglomerating, after the extruding slivering, be pressed into the adobe body, wherein adopt the semihard extruding during vitrified brick moulding, and the pressure-controlling of semihard extruding is 2.1-2.7MPa; As shown in Figure 2, through hole in the adobe 1 comprises a large square through-hole 3 and centers on 12 little square through-holes 2 of described large square through-hole, cutting obtains the porous adobe of moulding, and drying is through the tunnel furnace roasting, temperature rise rate is controlled to be 2-4 ℃/minute, maturing temperature is controlled under 950-1050 ℃, and roasting 6-8 hour, during cooling, rate of temperature fall is controlled to be 1-3 ℃/minute, and kiln discharge makes.Take product decortication, mute sound as defective, yield rate is 99%, and the iron ore fired slag brick of gained meets the performance requriements of GB13544-2000 " sintered perforated brick ".
Performance test:
Embodiment 2
Iron ore slag baked brick raw materials by oven dry weight, comprises the component of following weight part:
Iron ore slag 32 weight parts;
Cinder 31.5 weight parts;
Mud 20 weight parts;
Grog 8 weight parts;
Above-mentioned iron ore slag, cinder, grog are powder, and its particle diameter is 0.1-3mm.The iron ore slag of present embodiment derives from the iron ore slag waste that Lujiang, Anhui produces.
The preparation method of iron ore fired slag brick is:
Be that 30% iron ore slag drying and dewatering to water content is 13-18% with water content; Cinder and chamotte powder are milled to particle diameter are 0.1-3mm; The riverway sludge that with water content is 25%-40% is 13-18% through ageing, dewatered drying to water ratio; According to proportioning cinder, riverway sludge and grog being added the water ratio that mixes and add water adjustment mixture in the iron ore slag together is 13-18%, ageing 7 days.After the ageing, fully stir, the twin rollers roll extrusion is broken, the brick extruding machine extruding is agglomerating, after the extruding slivering, be pressed into the adobe body, wherein adopt the semihard extruding during vitrified brick moulding, and the pressure-controlling of semihard extruding is 2.1-2.7MPa; Through hole in the adobe comprises a large square through-hole and centers on 12 little square through holes of described large square through-hole, cutting obtains the porous adobe of moulding, dry, through the tunnel furnace roasting, temperature rise rate is controlled to be 2-4 ℃/minute, and maturing temperature is controlled under 950-1050 ℃, roasting 6-8 hour, during cooling, rate of temperature fall is controlled to be 1-3 ℃/minute, and kiln discharge makes.Take product decortication, mute sound as defective, yield rate is 99%, and the iron ore fired slag brick of gained meets the performance requriements of GB13544-2000 " sintered perforated brick ".
Performance test:
Iron ore slag baked brick raw materials by oven dry weight, comprises the component of following weight part:
Iron ore slag 28 weight parts;
Coal gangue 27.6 weight parts;
Mud 18 weight parts;
Grog 5 weight parts;
Above-mentioned iron ore slag, coal gangue, grog are powder, and its particle diameter is 0.1-0.3mm.The iron ore slag of present embodiment derives from the iron ore slag waste that Lujiang, Anhui produces.
The preparation method of iron ore fired slag brick is:
Be that 30% iron ore slag drying and dewatering to water content is 12-18% with water content; Coal gangue and chamotte powder are milled to particle diameter are 0.1-0.3mm; The riverway sludge that with water content is 25%-40% is 12-18% through ageing, dewatered drying to water ratio; According to proportioning coal gangue, riverway sludge and grog being added the water ratio that mixes and add water adjustment mixture in the iron ore slag together is 12-18%, ageing 7 days.After the ageing, fully stir, the twin rollers roll extrusion is broken, the brick extruding machine extruding is agglomerating, after the extruding slivering, be pressed into the adobe body, wherein adopt the semihard extruding during vitrified brick moulding, and the pressure-controlling of semihard extruding is 2.1-2.7MPa; Through hole in the adobe comprises a large square through-hole and centers on 12 little square through holes of described large square through-hole, cutting obtains the porous adobe of moulding, dry, through the tunnel furnace roasting, temperature rise rate is controlled to be 2-4 ℃/minute, and maturing temperature is controlled under 950-1050 ℃, roasting 6-7 hour, during cooling, rate of temperature fall is controlled to be 1-3 ℃/minute, and kiln discharge makes.Take product decortication, mute sound as defective, yield rate is 99%, and the iron ore fired slag brick of gained meets the performance requriements of GB13544-2000 " sintered perforated brick " after testing.
Embodiment 4
Iron ore slag baked brick raw materials by oven dry weight, comprises the component of following weight part:
Iron ore slag 36 weight parts;
Coal gangue 35 weight parts;
Mud 22.5 weight parts;
Grog 15 weight parts;
Above-mentioned iron ore slag, coal gangue, grog are powder, and its particle diameter is 0.1-0.3mm.The iron ore slag of present embodiment derives from the iron ore slag waste that Lujiang, Anhui produces.
The preparation method of iron ore fired slag brick is:
Be that 30% iron ore slag drying and dewatering to water content is 13-18% with water content; Coal gangue and chamotte powder are milled to particle diameter are 0.1-0.3mm; The riverway sludge that with water content is 25%-40% is 12-18% through ageing, dewatered drying to water ratio; According to proportioning coal gangue, riverway sludge and grog being added the water ratio that mixes and add water adjustment mixture in the iron ore slag together is 12-18%, ageing 7 days.After the ageing, fully stir, the twin rollers roll extrusion is broken, the brick extruding machine extruding is agglomerating, after the extruding slivering, be pressed into the adobe body, wherein adopt the semihard extruding during vitrified brick moulding, and the pressure-controlling of semihard extruding is 2.1-2.7MPa; Through hole in the adobe comprises a large square through-hole and centers on 12 little square through holes of described large square through-hole, cutting obtains the porous adobe of moulding, dry, through the tunnel furnace roasting, temperature rise rate is controlled to be 2-4 ℃/minute, and maturing temperature is controlled under 950-1050 ℃, roasting 5-6 hour, during cooling, rate of temperature fall is controlled to be 2-3 ℃/minute, and kiln discharge makes.Take product decortication, mute sound as defective, yield rate is 99%, and the iron ore fired slag brick of gained meets the performance requriements of GB13544-2000 " sintered perforated brick " after testing.
Embodiment 5
Iron ore slag baked brick raw materials by oven dry weight, comprises the component of following weight part:
Iron ore slag 32 weight parts;
Coal gangue 41.5 weight parts;
Mud 20 weight parts;
Grog 10 weight parts;
Above-mentioned iron ore slag, coal gangue, grog are powder, and its particle diameter is 0.1-0.3mm.The iron ore slag of present embodiment derives from the Iron Mine ground-slag waste that Lujiang, Anhui produces.
The preparation method of iron ore fired slag brick is:
Be that 30% iron ore slag drying and dewatering to water content is 13-18% with water content; Coal gangue and chamotte powder are milled to particle diameter are 0.1-0.3mm; The riverway sludge that with water content is 25%-40% is 13-18% through ageing, dewatered drying to water ratio; According to proportioning coal gangue, riverway sludge and grog being added the water ratio that mixes and add water adjustment mixture in the iron ore slag together is 13-18%, ageing 7 days.After the ageing, fully stir, the twin rollers roll extrusion is broken, the brick extruding machine extruding is agglomerating, after the extruding slivering, be pressed into the adobe body, wherein adopt the semihard extruding during vitrified brick moulding, and the pressure-controlling of semihard extruding is 2.1-2.7MPa; Through hole in the adobe comprises a large square through-hole and centers on 12 little square through-holes of described large square through-hole, cutting obtains the porous adobe of moulding, dry, through the tunnel furnace roasting, temperature rise rate is controlled to be 2-4 ℃/minute, and maturing temperature is controlled under 950-1050 ℃, roasting 6-8 hour, during cooling, rate of temperature fall is controlled to be 1-3 ℃/minute, and kiln discharge makes.Take product decortication, mute sound as defective, yield rate is 99%, and the iron ore fired slag brick of gained meets the performance requriements of GB13544-2000 " sintered perforated brick ".
Embodiment 6
Iron ore slag baked brick raw materials by oven dry weight, comprises the component of following weight part:
Iron ore slag 32 weight parts;
Cinder 25.5 weight parts;
Mud 21 weight parts;
Grog 8 weight parts;
Above-mentioned iron ore slag, cinder, grog are powder, and its particle diameter is 0.1-3mm.The iron ore slag of present embodiment derives from the iron ore slag waste that Lujiang, Anhui produces.
The preparation method of iron ore fired slag brick is:
Be that 30% iron ore slag drying and dewatering to water content is 13-18% with water content; Cinder and chamotte powder are milled to particle diameter are 0.1-3mm; The riverway sludge that with water content is 25%-40% is 13-18% through ageing, dewatered drying to water ratio; According to proportioning cinder, riverway sludge and grog being added the water ratio that mixes and add water adjustment mixture in the iron ore slag together is 13-18%, ageing 5-7 days.After the ageing, fully stir, the twin rollers roll extrusion is broken, the brick extruding machine extruding is agglomerating, after the extruding slivering, be pressed into the adobe body, wherein adopt the semihard extruding during vitrified brick moulding, and the pressure-controlling of semihard extruding is 2.1-2.7MPa; Through hole in the adobe comprises a large square through-hole and centers on 12 little square through holes of described large square through-hole, cutting obtains the porous adobe of moulding, dry, through the tunnel furnace roasting, temperature rise rate is controlled to be 2-4 ℃/minute, and maturing temperature is controlled under 950-1050 ℃, roasting 6-8 hour, during cooling, rate of temperature fall is controlled to be 1-3 ℃/minute, and kiln discharge makes.Take product decortication, mute sound as defective, yield rate is 99%, and the iron ore fired slag brick of gained meets the performance requriements of GB13544-2000 " sintered perforated brick ".
Embodiment 7
Iron ore slag baked brick raw materials by oven dry weight, comprises the component of following weight part:
Iron ore slag 32 weight parts;
Cinder 38.5 weight parts;
Mud 21 weight parts;
Grog 8 weight parts;
Above-mentioned iron ore slag, cinder, grog are powder, and its particle diameter is 0.1-3mm.The iron ore slag of present embodiment derives from the iron ore slag waste that Lujiang, Anhui produces.
The preparation method of iron ore fired slag brick is:
Be that 30% iron ore slag drying and dewatering to water content is 13-18% with water content; Cinder and chamotte powder are milled to particle diameter are 0.1-3mm; The riverway sludge that with water content is 25%-40% is 13-18% through ageing, dewatered drying to water ratio; According to proportioning cinder, riverway sludge and grog being added the water ratio that mixes and add water adjustment mixture in the iron ore slag together is 13-18%, ageing 5-7 days.After the ageing, fully stir, the twin rollers roll extrusion is broken, the brick extruding machine extruding is agglomerating, after the extruding slivering, be pressed into the adobe body, wherein adopt the semihard extruding during vitrified brick moulding, and the pressure-controlling of semihard extruding is 2.1-2.7MPa; Through hole in the adobe comprises a large square through-hole and centers on 12 little square through holes of described large square through-hole, cutting obtains the porous adobe of moulding, dry, through the tunnel furnace roasting, temperature rise rate is controlled to be 2-4 ℃/minute, and maturing temperature is controlled under 950-1050 ℃, roasting 6-8 hour, during cooling, rate of temperature fall is controlled to be 1-3 ℃/minute, and kiln discharge makes.Take product decortication, mute sound as defective, yield rate is 99%, and the iron ore fired slag brick of gained meets the performance requriements of GB13544-2000 " sintered perforated brick ".
Claims (5)
1. iron ore fired slag brick, its raw materials for sintering by oven dry weight, comprises the component of following weight part:
Iron ore slag 28-36 weight part;
Coal gangue 27.6-41.4 weight part or cinder 25.5-38.25 weight part;
Mud 15-22.5 weight part;
Grog 5-15 weight part;
Over dry refers to that the water ratio of component is 0;
Described iron ore slag is the residual Iron Mine ground-slag waste behind the extraction iron behind the Iron Ore grinding;
Described grog is that the useless brick that produces in the sintering process is the grinding material of 0.1-3mm through grinding acquisition particle diameter, or the useless brick that produces in the iron ore slag sintering process is the grinding material of 0.1-3mm through grinding acquisition particle diameter.
2. iron ore fired slag brick as claimed in claim 1 is characterized in that, the particle diameter of described coal gangue, cinder is 0.1-3mm.
3. iron ore fired slag brick as claimed in claim 1 is characterized in that, described mud is riverway sludge; Described riverway sludge is through ageing, dehydrates the viscosity mud of processing.
4. iron ore fired slag brick as claimed in claim 1 is characterized in that, described iron ore fired slag brick is perforated brick.
5. such as the preparation method of the arbitrary described iron ore fired slag brick of claim 1-4, comprise the following steps:
(1), be 13-18% with iron ore slag drying and dewatering to water content;
(2), with the mud ageing, dehydrate to water content be 13-18%;
(3), coal gangue, cinder and chamotte powder are milled to particle diameter and are 0.1-3mm;
(4), each raw material that will handle well according to proportioning mixes, ageing 5-7 days, the moisture control of the mixture of ageing was 13-18%;
(5), adopt the semihard extruding to make the vitrified brick moulding, and the pressure-controlling of semihard extruding is 2.1-2.7MPa; Dry; Kiln discharge makes after the tunnel furnace roasting, adopt the mode that steadily heats up during roasting, temperature rise rate is controlled to be 2-4 ℃/min, and the temperature of tunnel furnace roasting is controlled to be 950-1050 ℃, roasting time is 6-8 hour, and the rate of temperature fall after the described roasting is controlled to be 1-3 ℃/min.
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| CN104478402B (en) * | 2014-11-21 | 2016-08-31 | 佛山市高明区明城民诚新型墙体材料厂 | A kind of scrap baked brick and preparation method thereof |
| CN104529399B (en) * | 2014-12-15 | 2016-08-24 | 广东科达洁能股份有限公司 | A kind of cinder |
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| CN101612762A (en) * | 2009-06-25 | 2009-12-30 | 江苏江达生态科技有限公司 | Domestic sludge and river lakebed mud method for manufacturing bricks by mixing |
| CN101666129B (en) * | 2009-08-04 | 2012-02-29 | 上海鑫晶山淤泥研发有限公司 | Construction waste sintering brick and production method thereof |
| CN101666131B (en) * | 2009-09-10 | 2011-05-25 | 陆首萍 | All scrap baked brick |
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