CN102295467B - Method for preparing light ceramic particle from pyrite cinder - Google Patents
Method for preparing light ceramic particle from pyrite cinder Download PDFInfo
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- CN102295467B CN102295467B CN 201110163543 CN201110163543A CN102295467B CN 102295467 B CN102295467 B CN 102295467B CN 201110163543 CN201110163543 CN 201110163543 CN 201110163543 A CN201110163543 A CN 201110163543A CN 102295467 B CN102295467 B CN 102295467B
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- pyrite cinder
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Abstract
The invention provides a method for preparing light ceramic particle from pyrite cinder. The method comprises the following steps: 1) pretreating; 2) preparing materials; 3) mixing; 4) forming; 5) firing; and 6) preparing a finished product. The light ceramic particle prepared by the preparation method has low cost and can be used for preparing light concrete, heat insulation mortar, heat insulation loose filling material and refractory concrete, and by the adoption of the method, wastes are turned into wealth.
Description
Technical field
The invention belongs to and use the preparation of sintered material refuse as the method for the material of construction such as concrete or rostone with light ceramic, relate to a kind of method of preparing light ceramic particle from pyrite cinder.The light ceramic collection that makes is particularly useful for making light weight concrete, also can be used in other light building material.
Background technology
Pyrite cinder is to adopt sulfurous iron ore to prepare a kind of waste residue of discharging in sulfuric acid or sulphur process.China's ferro-sulphur ore is abundant, accounts for 10% of world's total reserves, occupies the 3rd, only the former six Pan Shui economic zone Coal-pyrite resource reserves of Chuan Nan, the northern regions of the Yunnan Province, the west of Guizhou Province just reach 6,500,000,000 tons, prospective reserves is more than 40,000,000,000 tons, but China's sulfurous iron ore mainly with in low-grade be main, average geologic grade 17.68%.In China, the low grade pyrite routine is utilized as washing and becomes pyrite concentrate to make the gas washing in SA production raw material, but ecotope, industrial and agricultural production, the people's health of storing up the locality of a large amount of milltailings slags have caused serious harm, and the environment such as waters are on every side caused serious pollution.1 ton of sulfuric acid of the every production of pyrite concentrate simultaneously approximately discharges the pyrite cinder of 0.7 ton, and is current, the millions of slags to up to ten million tons of the annual discharging of China, and quantity discharged is quite large, and technological breakthrough is expected in its effective utilization always.Yunnan Evergreen Tree Investment Co., Ltd. with the related scientific research institutes succeeded in developing with in low grade pyrite direct production sulphur, sulfuric acid new technology, compare it with conventional art and do not need the techniques such as ore dressing, solved the environmental stress of tailings discharging, but the quantity discharged of its slag is larger.This slag, the iron grade is hanged down can not be used as iron-smelting raw material, produces solid sewage-treating agent and red iron oxide etc. and makes the consumption of slag little because demand is few, burns till with the mineralizer application wideless as cement auxiliary ingredients and alternative iron ore making cement.Therefore, how high efficiency, low cost, on a large scale utilize in the low grade pyrite slag restrict especially in low grade pyrite directly utilize new technology spread to use bottleneck.
Light-weight aggregate refers to that tap density is not more than 1100 kg/m
3Light coarse aggregate and tap density be not more than 1200 kg/m
3The general name of light fine aggregate, it is mainly used to prepare light weight concrete, thermal insulation mortar, the loose stopping composition of insulation and refractory concrete etc., light aggregate is originated by starting material and is divided into natural light-weight aggregate, artificial lightweight aggregate and trade waste light-weight aggregate, and haydite is the main composition of artificial lightweight aggregate and solid waste light-weight aggregate, and the prepared haydite of this patent belongs to a kind of of solid waste light-weight aggregate.Natural light-weight aggregate is convenient due to exploitation, production energy consumption is little, cheaply favored, but its foreign matter content is larger, and finished product character fluctuation is large; The artificial lightweight aggregate quality is better, complex manufacturing, and energy consumption is high and be subject to the restriction of raw material resources; The same artificial aggregate of solid waste light-weight aggregate production technique, but owing to having consumed cheap waste, not only reduce production costs, and turn waste into wealth and obtain production application widely, thus, solid waste porcelain has very large development space.This patent is take pyrite cinder as main raw material, mixes a small amount of phosphogypsum and pulverized coal preparation ordinary ceramsite or mix mud to prepare high-strength ceramic granule, for a new direction has been opened up again in the production of light ceramic.
Summary of the invention
Purpose of the present invention is intended to overcome the deficient problem of raw material resources in existing haydite production, propose a kind of solid waste pyrite cinder that utilizes and prepare the method for light ceramic for main raw material, the light ceramic that the present invention makes, not only with low cost, turn waste into wealth, and can consume in a large number slag, be convenient to the place useless, there is no secondary slag exhaust emission, and the SO that is overflowed by decomposing ardealite
3Recyclable preparation sulfuric acid.
Content of the present invention is: a kind of 1, method of preparing light ceramic particle from pyrite cinder comprises the following steps:
A, pre-treatment: pyrite cinder and phosphogypsum are milled to respectively 0.075mm tail over powder less than 5%; Coal dust is milled to 0.075mm and tails over powder less than 10%;
Perhaps, the mud powder of pyrite cinder and oven dry all is milled to 0.075mm and tails over powder less than 10%;
B, batching: pyrite cinder: the phosphogypsum mass ratio is 12:3～8, and mixing mass ratio outward according to the mixture of pyrite cinder and phosphogypsum is 4%～12% coal dust;
Perhaps, pyrite cinder accounts for 50%～70% of batching total amount, and all the other are mud;
C, mixing: with pyrite cinder and phosphogypsum mix and blend, after it is fully mixed, then make compound after mixing the even mixing of coal dust;
Perhaps, with pyrite cinder and mud mix and blend, after fully being mixed, it makes compound;
D, moulding: with compound admixture amount of water, can hand pinch agglomeratingly to compound, adopt manual or mechanical balling-up, the balling-up particle diameter be at 10～15mm;
E, sintering technology: the moulding pellet was dried 2 hours at 105 ℃, then the temperature rise rate with 6～8 ℃/min rises to 400 degree, changes over to immediately after insulation 20min in the moderate oven that temperature is 900 degree, with the speed of 5 ℃/min, be rapidly heated to 1200～1250 ℃, insulation 20～35min;
F, finished product: after baking, be cooled to after 800～900 ℃ of taking-ups coolingly, make finished product.
Pyrite cinder with carry out original position with coal dust again after phosphogypsum mixes and mix.
It is large volume component to be divided into some equal portions mix with little volume component successively that original position is mixed, and is about to pyrite cinder and is divided into 2～6 parts, adds in coal dust successively and mixes, and often adding a mix and blend time is 1～5 minute.
The light ceramic that adopts content of the present invention and the described method of above-described embodiment to make gathers materials, and mixes with gelling material, water, admixture etc. material of construction such as can preparing light weight concrete or thermal insulation mortar, and its volume is decided with demand.
Compared with prior art, the present invention has following characteristics and beneficial effect:
(1) the present invention's starting material pyrite slag, phosphogypsum, mud used is waste residue, it is taken full advantage of satisfy national energy-saving reduction of discharging requirement.
(2) the present invention utilizes industrial residue to be raw material, and is more cheap than the leca cost, and meets the state guarantee needs of ploughing, and can consume in a large number slag, and the slag volume is more than 50%.
(3) the present invention's subsidiary material phosphogypsum used is all industrial residue, the recyclable preparation sulfuric acid of the sulphur trioxide of overflowing in haydite.
Embodiment
Embodiment given below is so that the invention will be further described; but can not be interpreted as it is limiting the scope of the invention; the person skilled in art to some nonessential improvement and adjustment that the present invention makes, still belongs to protection scope of the present invention according to the content of the invention described above.
Embodiment 1:
A kind of method of preparing light ceramic particle from pyrite cinder comprises the following steps:
A, pre-treatment: pyrite cinder and phosphogypsum are milled to respectively 0.075mm tail over powder less than 5%, coal dust is milled to 0.075mm and tails over powder less than 10%; The technical analysis of coal dust: fugitive constituent is 17.98%, and fixed carbon is 58.54%, moisture is 3.5%, and ash content is 19.98%; Rear same; The chief component of pyrite cinder and mass percent are: SiO
231.84%, Al
2O
327.86%, Fe
2O
329.80%, CaO 4.18%; Rear same; Main chemical constitution and the mass percent of phosphogypsum are: SO
349.36%, CaO 36.15%, SiO
210.63%; Rear same;
B, batching: pyrite cinder: the phosphogypsum mass ratio is 4:1, and mixing mass ratio outward according to the mixture of pyrite cinder and phosphogypsum is 12% coal dust;
C, mixing: with pyrite cinder and phosphogypsum mix and blend, after it is fully mixed, then make compound after mixing the even mixing of coal dust;
D, moulding: with compound admixture amount of water, can hand pinch agglomeratingly to compound, adopt manual or mechanical balling-up, the balling-up particle diameter be at 10～15mm;
E, sintering technology: the moulding pellet was dried 2 hours at 105 ℃, then the temperature rise rate with 6 ℃/min rises to 400 degree, changes over to immediately after insulation 20min in the moderate oven that temperature is 900 degree, with the speed of 5 ℃/min, be rapidly heated to 1200 ℃, insulation 20min;
F, finished product: after baking, be cooled to after 800～900 ℃ of taking-ups coolingly, make the haydite finished product.
The haydite performance test is as follows:
Tap density is 920kg/m
3, water-intake rate is 7.2%, apparent density is 1650kg/m
3, cylindrical compress strength is 5.6MPa, sulphur content 0.40%, and all the other indexs are all qualified.
Embodiment 2:
A kind of method of preparing light ceramic particle from pyrite cinder comprises the following steps:
A, pre-treatment: pyrite cinder and phosphogypsum are milled to respectively 0.075mm tail over powder less than 5%, coal dust is milled to 0.075mm and tails over powder less than 10%;
B, batching: pyrite cinder: the phosphogypsum mass ratio is 4:1, and mixing mass ratio outward according to the mixture of pyrite cinder and phosphogypsum is 12% coal dust;
C, mixing: with pyrite cinder and phosphogypsum mix and blend, after it is fully mixed, then make compound after mixing the even mixing of coal dust;
D, moulding: with compound admixture amount of water, can hand pinch agglomeratingly to compound, adopt manual or mechanical balling-up, the balling-up particle diameter be at 10～15mm;
E, sintering technology: the moulding pellet was dried 2 hours at 105 ℃, then the temperature rise rate with 6 ℃/min rises to 400 degree, changes over to immediately after insulation 20min in the moderate oven that temperature is 900 degree, with the speed of 5 ℃/min, be rapidly heated to 1250 ℃, insulation 20min;
F, finished product: after baking, be cooled to after 800～900 ℃ of taking-ups coolingly, make the haydite finished product.
The haydite performance test is as follows:
Tap density is 860kg/m
3, water-intake rate is 10.0%, apparent density is 1530kg/m
3, cylindrical compress strength is 5.1MPa, sulphur content 0.32%, and all the other indexs are all qualified.
Embodiment 3:
A kind of method of preparing light ceramic particle from pyrite cinder comprises the following steps:
A, pre-treatment: pyrite cinder and phosphogypsum are milled to respectively 0.075mm tail over powder less than 5%, coal dust is milled to 0.075mm and tails over powder less than 10%;
B, batching: pyrite cinder: the phosphogypsum mass ratio is 4:1, and mixing mass ratio outward according to the mixture of pyrite cinder and phosphogypsum is 4% coal dust;
C, mixing: with pyrite cinder and phosphogypsum mix and blend, after it is fully mixed, then make compound after mixing the even mixing of coal dust;
D, moulding: with compound admixture amount of water, can hand pinch agglomeratingly to compound, adopt manual or mechanical balling-up, the balling-up particle diameter be at 10～15mm;
E, sintering technology: the moulding pellet was dried 2 hours at 105 ℃, then the temperature rise rate with 6 ℃/min rises to 400 degree, changes over to immediately after insulation 20min in the moderate oven that temperature is 900 degree, with the speed of 5 ℃/min, be rapidly heated to 1250 ℃, insulation 20min;
F, finished product: after baking, be cooled to after 800～900 ℃ of taking-ups coolingly, make the haydite finished product.
The haydite performance test is as follows:
Tap density is 810kg/m
3, water-intake rate is 4.4%, apparent density is 1390kg/m
3, cylindrical compress strength is 3.4MPa, sulphur content 0.27%, and all the other indexs are all qualified.
Embodiment 4:
A kind of method of preparing light ceramic particle from pyrite cinder comprises the following steps:
A, pre-treatment: pyrite cinder and phosphogypsum are milled to respectively 0.075mm tail over powder less than 5%, coal dust is milled to 0.075mm and tails over powder less than 10%;
B, batching: pyrite cinder: the phosphogypsum mass ratio is 3:2, and mixing mass ratio outward according to the mixture of pyrite cinder and phosphogypsum is 12% coal dust;
C, mixing: with pyrite cinder and phosphogypsum mix and blend, after it is fully mixed, then make compound after mixing the even mixing of coal dust;
D, moulding: with compound admixture amount of water, can hand pinch agglomeratingly to compound, adopt manual or mechanical balling-up, the balling-up particle diameter be at 10～15mm;
E, sintering technology: the moulding pellet was dried 2 hours at 105 ℃, then the temperature rise rate with 6 ℃/min rises to 400 degree, changes over to immediately after insulation 20min in the moderate oven that temperature is 900 degree, with the speed of 5 ℃/min, be rapidly heated to 1250 ℃, insulation 20min;
F, finished product: after baking, be cooled to after 800～900 ℃ of taking-ups coolingly, make the haydite finished product.
The haydite performance test is as follows:
Tap density is 890kg/m
3, water-intake rate is 19.4%, apparent density is 1500kg/m
3, cylindrical compress strength is 4.5MPa, sulphur content is (with SO
3Meter) 0.52%, all the other indexs are all qualified.
Embodiment 5:
A kind of method of preparing light ceramic particle from pyrite cinder comprises the following steps:
A, pre-treatment: pyrite cinder and phosphogypsum are milled to respectively 0.075mm tail over powder less than 5%, coal dust is milled to 0.075mm and tails over powder less than 10%;
B, batching: pyrite cinder: the phosphogypsum mass ratio is 3:2, and mixing mass ratio outward according to the mixture of pyrite cinder and phosphogypsum is 8% coal dust;
C, mixing: with pyrite cinder and phosphogypsum mix and blend, after it is fully mixed, then make compound after mixing the even mixing of coal dust;
D, moulding: with compound admixture amount of water, can hand pinch agglomeratingly to compound, adopt manual or mechanical balling-up, the balling-up particle diameter be at 10～15mm;
E, sintering technology: the moulding pellet was dried 2 hours at 105 ℃, then the temperature rise rate with 6 ℃/min rises to 400 degree, changes over to immediately after insulation 20min in the moderate oven that temperature is 900 degree, with the speed of 5 ℃/min, be rapidly heated to 1250 ℃, insulation 20min;
F, finished product: after baking, be cooled to after 800～900 ℃ of taking-ups coolingly, make the haydite finished product.
The haydite performance test is as follows:
Tap density is 900kg/m
3, water-intake rate is 19.9%, apparent density is 1470kg/m
3, cylindrical compress strength is 3.6MPa, sulphur content is (with SO
3Meter) 0.67%, all the other indexs are all qualified.
Embodiment 6:
A kind of method of preparing light ceramic particle from pyrite cinder comprises the following steps:
In content of the present invention: described step a, step b and step c can replace with:
A, pre-treatment: the mud powder of pyrite cinder and oven dry all is milled to 0.075mm tails over powder less than 10%;
Main chemical constitution and the mass percent of mud are: CaO 6.03%, SiO
263.72%, Al
2O
310.67%, Fe
2O
35.12%, loss on ignition 9.60%; Rear same;
B, batching: the ratio taken amount take mass ratio as 1:1 with pyrite cinder and mud;
C, mixing: with pyrite cinder and mud mix and blend, make compound after it is fully mixed;
D, moulding: with compound admixture amount of water, can hand pinch agglomeratingly to compound, adopt manual or mechanical balling-up, the balling-up particle diameter be at 10～15mm;
E, sintering technology: the moulding pellet was dried 2 hours at 105 ℃, then the temperature rise rate with 6～8 ℃/min rises to 400 degree, changes over to immediately after insulation 20min in the moderate oven that temperature is 900 degree, with the speed of 5 ℃/min, be rapidly heated to 1200～1200 ℃, insulation 20～35min;
F, finished product: after baking, be cooled to after 800～900 ℃ of taking-ups coolingly, make finished product.
The haydite performance test is as follows:
Tap density is 1190kg/m
3, water-intake rate is 7.9%, and cylindrical compress strength is 10.2MPa, and all the other indexs are all qualified.
Embodiment 7:
A kind of method of preparing light ceramic particle from pyrite cinder comprises the following steps:
In content of the present invention: described step a, step b and step c can replace with:
A, pre-treatment: the mud powder of pyrite cinder and oven dry all is milled to 0.075mm tails over powder less than 10%;
B, batching: the ratio taken amount take mass ratio as 3:2 with pyrite cinder and mud;
C, mixing: with pyrite cinder and mud mix and blend, make compound after it is fully mixed;
D, moulding: with compound admixture amount of water, can hand pinch agglomeratingly to compound, adopt manual or mechanical balling-up, the balling-up particle diameter be at 10～15mm;
E, sintering technology: the moulding pellet was dried 2 hours at 105 ℃, then the temperature rise rate with 6～8 ℃/min rises to 400 degree, changes over to immediately after insulation 20min in the moderate oven that temperature is 900 degree, with the speed of 5 ℃/min, be rapidly heated to 1220 ℃, insulation 20～35min;
F, finished product: after baking, be cooled to after 800～900 ℃ of taking-ups coolingly, make finished product.
The haydite performance test is as follows:
Tap density is 990kg/m
3, water-intake rate is 4.0%, and cylindrical compress strength is 14.4MPa, and all the other indexs are all qualified.
Embodiment 8:
A kind of method of preparing light ceramic particle from pyrite cinder comprises the following steps:
In content of the present invention: described step a, step b and step c can replace with:
A, pre-treatment: the mud powder of pyrite cinder and oven dry all is milled to 0.075mm tails over powder less than 10%;
B, batching: the ratio taken amount take mass ratio as 7:3 with pyrite cinder and mud;
C, mixing: with pyrite cinder and mud mix and blend, make compound after it is fully mixed;
D, moulding: with compound admixture amount of water, can hand pinch agglomeratingly to compound, adopt manual or mechanical balling-up, the balling-up particle diameter be at 10～15mm;
E, sintering technology: the moulding pellet was dried 2 hours at 105 ℃, then the temperature rise rate with 6～8 ℃/min rises to 400 degree, changes over to immediately after insulation 20min in the moderate oven that temperature is 900 degree, with the speed of 5 ℃/min, be rapidly heated to 1220 ℃, insulation 20～35min;
F, finished product: after baking, be cooled to after 800～900 ℃ of taking-ups coolingly, make finished product.
The haydite performance test is as follows:
Tap density is 1120kg/m
3, water-intake rate is 5.0%, and cylindrical compress strength is 11.5MPa, and all the other indexs are all qualified.
In above-described embodiment, main chemical constitution and the mass percent of described pyrite cinder can not be subject to the above restrictions yet.
The light ceramic that adopts content of the present invention and the described method of above-described embodiment to make mixes with gelling material, water, admixture etc. material of construction such as can preparing light weight concrete or thermal insulation mortar, and its volume is decided with demand.
The invention is not restricted to above-described embodiment, content of the present invention is described all can implement and have described good result.
Claims (1)
1. the method for a preparing light ceramic particle from pyrite cinder, is characterized in that, comprises the following steps:
A, pre-treatment: pyrite cinder and phosphogypsum are milled to respectively 0.075mm tail over powder less than 5%; Coal dust is milled to 0.075mm and tails over powder less than 10%;
Perhaps, the mud powder of pyrite cinder and oven dry all is milled to 0.075mm and tails over powder less than 10%;
B, batching: pyrite cinder: the phosphogypsum mass ratio is 12:3～8, and mixing mass ratio outward according to the mixture of pyrite cinder and phosphogypsum is 4%～12% coal dust;
Perhaps, pyrite cinder accounts for 50%～70% of batching total amount, and all the other are mud;
C, mixing: with pyrite cinder and phosphogypsum mix and blend, after it is fully mixed, then make compound after mixing the even mixing of coal dust;
Perhaps, with pyrite cinder and mud mix and blend, after fully being mixed, it makes compound;
D, moulding: with compound admixture amount of water, can hand pinch agglomeratingly to compound, adopt manual or mechanical balling-up, the balling-up particle diameter be at 10～15mm;
E, sintering technology: the moulding pellet was dried 2 hours at 105 ℃, then the temperature rise rate with 6～8 ℃/min rises to 400 degree, changes over to immediately after insulation 20min in the moderate oven that temperature is 900 degree, with the speed of 5 ℃/min, be rapidly heated to 1200～1250 ℃, insulation 20～35min;
F, finished product: after baking, be cooled to after 800～900 ℃ of taking-ups coolingly, make finished product.
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| CN102295467B true CN102295467B (en) | 2013-06-19 |
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| CN102659329B (en) * | 2012-04-27 | 2013-07-17 | 西南科技大学 | Preparation method for quick hardening early strength hydraulic cementing material |
| CN105272340B (en) * | 2015-10-30 | 2017-09-22 | 武汉科技大学 | A kind of method that decomposing phosphogypsum prepares silico-calcium matter porous ceramic grain and sulfuric acid |
| CN109438082A (en) * | 2018-12-26 | 2019-03-08 | 蓝星（成都）新材料有限公司 | The preparation method of calcium sulphate dihydrate suitable for soil |
| CN111434638A (en) * | 2019-01-14 | 2020-07-21 | 吉林市三路陶业有限公司 | Argil sintering infiltration brick |
| CN111282964B (en) * | 2020-03-03 | 2021-12-17 | 卢衍忠 | Device for preparing ceramsite sand by treating garbage |
| CN113135679B (en) * | 2021-04-16 | 2023-05-16 | 成都中弘轨道交通环保产业股份有限公司 | Ceramsite fired by nepheline tailings and preparation method thereof |
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| CN101050100A (en) * | 2007-04-16 | 2007-10-10 | 李兴 | Technique for producing production of ceramic aggregate from clinker burnt from household garbage and municipal sludge |
| CN101525219A (en) * | 2009-04-06 | 2009-09-09 | 河北理工大学 | Solid waste porcelain granule in iron ore mine and ore dressing plant and preparation method thereof |
| CN101817671B (en) * | 2010-02-09 | 2012-07-11 | 广州建材企业集团有限公司 | Method for burning fly ash by utilizing refuse in ceramsite production |
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