CN102626668B - Efficient magnetic separation method for quartz sand - Google Patents
Efficient magnetic separation method for quartz sand Download PDFInfo
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Abstract
The invention discloses an efficient purification method for quartz sand. In the method, two-section smashing (rough smashing and fine smashing) and ore milling with a rod mill are adopted, so that the production capacity is increased greatly, unit energy consumption is lowered, and the method is suitable for large-scale production. A method for removing weakly-magnetic minerals and intergrowth quartz with high iron content from quartz sand through advanced ore washing and weakly magnetic-high gradient strongly magnetic combined magnetic separation before ore milling is adopted, so that the purity of quartz sand is increased greatly. The method has the advantages of simple process flow, easiness for operating, low cost, high purification efficiency, stable performance and environmental friendliness of a produced product, no use of any chemical substance in an entire production process, no production of any waste water, waste residues and waste gas, true realization of zero emission, no production of waste and prevention of pollution. The method is not limited by the production scale, various quartz sand products of low, medium and high grades can be produced, the enterprise profit can be maximized, and the method has a wide application prospect on the aspect of purification of quartz sand.
Description
Technical field
The present invention relates to the method for purification of quartz sand, especially relate to a kind of efficient magnetic selection method of quartz sand.
Background technology
Quartz sand is irreplaceable basic material in national strategy and mainstay industry development, is widely used in the high-tech sectors such as glass, photovoltaic, photoelectricity and space flight.Along with developing rapidly of these fields, the demand of quartz sand is increased day by day, and good quartz mine resource is day by day exhausted along with the continuous exploitation in age.How common quartz sand resources is fully utilized by purification, just seem most important.
The tradition method of purification is mainly to realize by methods such as flotation, acidleach, traditional magnetic separation.Acidleach and flotation all will be added chemical substance in process, these chemical substances not only exist the hidden danger of environmental protection aspect, and in the quartz sand product of producing because of residual the acid or alkaline medicament that adds, can cause in various degree impact to follow-up technology and equipment, and production process is subjected to the impact of the factors such as temperature, concentration, pH value, production operation is poor, and not looked at by the parent of enterprise.
The tradition method of purification also adopts the various strong bar magnet of quantity (surface electric field intensity is 0.8 tesla left and right) to be placed in irrigation canals and ditches and manually to clean successively mostly, reach the purpose of deironing, so not only workman's workload is large, and affected by numerous human factors such as cleaning frequency, bad control in production.Drum magnetic separator because of magnetic force little and material can not with the reasons such as drum surface fully contacts, de-ferrous effect is not good yet when producing this quartz-like sand.And be no matter strong bar magnet or drum magnetic separator along with the growth of service time, all can decay to some extent in magnetic field.
In addition, traditional method of purification is because of technique imperfection and equipment backwardness, and not only production is difficult to the formation scale, and also is difficult to obtain positive effect aspect purification.
Summary of the invention
Purpose of the present invention just is to provide that a kind of purity that increases substantially quartz sand, zero-emission, no waste produce, pollution-free, production capacity is high, specific energy consumption is low, is suitable for the efficient magnetic selection method of large-scale production.
The object of the present invention is achieved like this:
A kind of efficient magnetic selection method of quartz sand, feature is:
1, fragmentation-washup: quartz mine is slightly broken to the bulk of 5cm * 5cm through jaw crusher, enter the gyratory crusher thin broken to the fine ore of 1cm * 1cm left and right, with belt, fine ore is delivered on vibratory sieve, and utilize water under high pressure that the fine ore on vibratory sieve is rinsed, remove the impurity components such as clay on fine ore surface, the lower material of sieve obtains can be used as the first byproduct of simple glass raw material through the desliming of a desliming bucket, after concentrating: quartzy general sand; The overflow of a desliming bucket enters thickening pond;
2, ore grinding-first classification: the fine ore that will wash is first sent into rod mill and is carried out wet milling, the ore pulp of wearing into, and entering screen cloth is that 20 purpose cylinder roller screens carry out first classification, the material on sieve is regrinded with Belt Conveying to rod mill;
3, desliming: the ore pulp under cylinder screen enters the desliming bucket No. two, screens out mud and mica group light weight sundries in ore pulp, and the overflow portion of No. two desliming buckets enters thickening pond;
4, magnetic separation: the underflow breeze of desliming bucket is successively through cartridge type weak magnetic separator and vertical ring pulsating high gradient intensity magnetic separator, the field intensity of cartridge type weak magnetic separator is 0.1～0.5 tesla, be mainly used to remove the mechanical iron that enters in strongly magnetic mineral in quartz sand and process, the background lectromagnetism field of vertical ring pulsating high gradient intensity magnetic separator requires to reach 1 tesla, medium adopts 1.5 mm rod media, feed ore concentration is controlled at 10～15%, with the biotite, the Fe that remove in quartz sand
2O
3, TiO
2Deng weak magnetic mineral, the mine tailing that obtains after low intensity magnetic separation and high intensity magnetic separation is Magnetic Materials, is the second byproduct: non-burning brick raw sand can be used to do the non-burning brick construction material of Denging;
5, secondary grading: low intensity magnetic separation and high intensity magnetic separation mortar later carries out secondary grading through hydraulic classifier, by the sand removing hole valve of adjusting hydraulic classiciation motor spindle and the size of back-flushing, realizes that the client is to the demand of size fractionated product;
6, concentrate-dehydration: the underflow mortar and the overflow mortar that obtain after the hydraulic classifier secondary grading are concentrated respectively and the high frequency shale shaker dehydration, and the underflow mortar obtains the first major product and (contains SiO after concentrating, dewatering
2〉=99.8%, Fe
2O
3≤ 0.007%, AL
2O
3≤ 0.2%): glass sand, the overflow mortar obtains the second major product after concentrating, dewatering: quartzy washed ore, glass sand are applied to solar energy, the contour sophisticated technology industry of optical-fibre communications, and quartzy washed ore is as the raw material of Ceramic glaze.
Mine tailing in thickening pond is processed: the mine tailing that in the mine tailing that in fragmentation-washup flow process, desliming bucket obtains and Desliming process, No. two desliming buckets obtain all is admitted to thickening pond, first concentrate by thickening pond, filter through filter, the filter residue that obtains is as the 3rd byproduct: cement raw material again.
The present invention adopts the method for washup in advance before two sections fragmentations, ore grinding, the strong magnetic associating of weak magnetic-high gradient magnetic separation to come purifying quartz sand, compares with traditional method of purification, and the present invention has following features:
1, the present invention adopts two sections fragmentations (thick broken, thin broken) and rod mill ore grinding, has overcome the shortcoming that traditional method of purification only has thick broken one broken process, makes production capacity greatly improve, and specific energy consumption reduces, and is suitable for large-scale production.
2, on magnetic plant, except adopting the cartridge type weak magnetic separator, also adopted vertical ring pulsating high gradient intensity magnetic separator, not only magnetic field intensity is large for vertical ring pulsating high gradient intensity magnetic separator, gradient is high, and key is to have configured pulsing mechanism, and pulsing mechanism can carry out repeated screening with the weak magnetic mineral in quartz sand and the high intergrowth quartz of iron-holder, removed to the full extent, thereby improved the purity of quartz sand.
3, the present invention has carried out reasonable processing to mine tailing, has not only saved water, and the filter residue that obtains is used as cement raw material as the 3rd byproduct, has opened up a product for enterprise is multiple, has really accomplished zero-emission, and no waste produces, and is pollution-free; And traditional method of purification is little because of production scale, and mine tailing is not generally processed, and can pollute selecting factory and surrounding enviroment.
4, technological process of the present invention is simple, easy to operate, cost is low, purification efficiency is high, and the properties of product of producing are stable, production environment is friendly, do not use any chemical substance in whole production process, also do not produce any waste water, waste residue and waste gas.
The present invention is not limited by production scale, the multiple quartz sand product such as multiple basic, normal, high that can produce, thereby enterprise profit can be maximized, having a wide range of applications aspect the purification of quartz sand.
Contrast such as the following table of the present invention and the traditional method of purification major product production target when the test of Area, Fengyang County, Anhui quartz sand factory.As seen from the table, produce quartz sand with the present invention and compare with traditional method of purification, (refer to the useful component SiO in raw ore although the original quality of raw ore is lower
2Content lower, impurity content is high), but the quartz sand concentrate quality that obtains increases substantially, SiO
2Content is promoted to 99.8% by 99.1%, objectionable impurities Fe
2O
3Be down to 0.0063% by 0.015%, the deironing rate improves 20.73 percentage points, reaches the requirement of solar energy, the contour most advanced and sophisticated raw material of optical-fibre communications.
The specific embodiment
Below in conjunction with embodiment, the present invention is described in further detail.
A kind of efficient magnetic selection method of quartz sand, concrete steps are as follows:
1, fragmentation-washup: quartz mine is slightly broken to the bulk of 5cm * 5cm through jaw crusher, enter the gyratory crusher thin broken to the fine ore of 1cm * 1cm left and right, with belt, fine ore is delivered on vibratory sieve, and utilize water under high pressure that the fine ore on vibratory sieve is rinsed, remove the impurity components such as clay on fine ore surface, the lower material of sieve obtains can be used as the first byproduct of simple glass raw material through the desliming of a desliming bucket, after concentrating: quartzy general sand; The overflow of a desliming bucket enters thickening pond;
2, ore grinding-first classification: the fine ore that will wash is first sent into rod mill and is carried out ore grinding, the ore pulp of wearing into, and entering screen cloth is that 20 purpose cylinder roller screens carry out first classification, the material on the cylinder roller screen is regrinded with Belt Conveying to rod mill;
3, desliming: the ore pulp under cylinder screen enters the desliming bucket No. two, screens out mud and mica group light weight sundries in ore pulp, and the overflow portion of No. two desliming buckets enters thickening pond;
4, magnetic separation: the underflow breeze of desliming bucket is successively through cartridge type weak magnetic separator and vertical ring pulsating high gradient intensity magnetic separator, the field intensity of cartridge type weak magnetic separator is 0.1～0.5 tesla, be mainly used to remove the mechanical iron that enters in strongly magnetic mineral in quartz sand and process, the background lectromagnetism field of vertical ring pulsating high gradient intensity magnetic separator requires to reach 1 tesla, medium adopts 1.5 mm rod media, feed ore concentration is controlled at 10～15%, with the biotite, the Fe that remove in quartz sand
2O
3, TiO
2Deng weak magnetic mineral, the mine tailing that obtains after low intensity magnetic separation and high intensity magnetic separation is Magnetic Materials, is the second byproduct: non-burning brick raw sand can be used to do the non-burning brick construction material of Denging;
5, secondary grading: low intensity magnetic separation and high intensity magnetic separation mortar later carries out secondary grading through hydraulic classifier, by the sand removing hole valve of adjusting hydraulic classiciation motor spindle and the size of back-flushing, realizes that the client is to the demand of size fractionated product;
6, concentrate-dehydration: the underflow mortar and the overflow mortar that obtain after the hydraulic classifier secondary grading are concentrated respectively and the high frequency shale shaker dehydration, and the underflow mortar obtains the first major product and (contains SiO after concentrating, dewatering
2〉=99.8%, Fe
2O
3≤ 0.007%, AL
2O
3≤ 0.2%): glass sand, the overflow mortar obtains the second major product after concentrating, dewatering: quartzy washed ore, glass sand are applied to solar energy, the contour sophisticated technology industry of optical-fibre communications, and quartzy washed ore is as the raw material of Ceramic glaze.
Mine tailing in thickening pond is processed: the mine tailing that in the mine tailing that in fragmentation-washup flow process, desliming bucket obtains and Desliming process, No. two desliming buckets obtain all is admitted to thickening pond, first concentrate by thickening pond, filter through filter, the filter residue that obtains is as the 3rd byproduct: cement raw material again.
Claims (2)
1. the efficient magnetic selection method of a quartz sand is characterized in that:
(1), fragmentation-washup: quartz mine is slightly broken to the bulk of 5cm * 5cm through jaw crusher, enter the gyratory crusher thin broken to the fine ore of 1cm * 1cm left and right, with belt, fine ore is delivered on vibratory sieve, and utilize water under high pressure that the fine ore on vibratory sieve is rinsed, remove the clay impurity component on fine ore surface, the lower material of sieve obtains can be used as the first byproduct of simple glass raw material through the desliming of a desliming bucket, after concentrating: quartzy general sand; The overflow of a desliming bucket enters thickening pond;
(2), ore grinding-first classification: the fine ore that will wash is first sent into rod mill and is carried out wet milling, and entering screen cloth is that 20 purpose cylinder roller screens carry out first classification, and the material on sieve is regrinded with Belt Conveying to rod mill;
(3), desliming: the ore pulp under cylinder screen enters the desliming bucket No. two, screens out mud and mica group light weight sundries in ore pulp, and the overflow portion of No. two desliming buckets enters thickening pond;
(4), magnetic separation: the underflow breeze of desliming bucket is successively through cartridge type weak magnetic separator and vertical ring pulsating high gradient intensity magnetic separator, the field intensity of cartridge type weak magnetic separator is 0.1～0.5 tesla, the background lectromagnetism field of vertical ring pulsating high gradient intensity magnetic separator requires to reach 1 tesla, medium adopts 1.5 mm rod media, feed ore concentration is controlled at 10～15%, the mine tailing that obtains after low intensity magnetic separation and high intensity magnetic separation is Magnetic Materials, is the second byproduct: non-burning brick raw sand;
(5), secondary grading: low intensity magnetic separation and high intensity magnetic separation mortar later carries out secondary grading through hydraulic classifier, by the sand removing hole valve of adjusting hydraulic classiciation motor spindle and the size of back-flushing, realizes that the client is to the demand of size fractionated product;
(6), concentrate-dehydration: the underflow mortar and the overflow mortar that obtain after the hydraulic classifier secondary grading are concentrated respectively and the high frequency shale shaker dehydration, and the underflow mortar obtains containing SiO after concentrating, dewatering
2〉=99.8%, Fe
2O
3≤ 0.007%, AL
2O
3The first major product of≤0.2%: glass sand, overflow mortar obtain the second major product after concentrating, dewatering: quartzy washed ore.
2. the efficient magnetic selection method of quartz sand according to claim 1, it is characterized in that: mine tailing in thickening pond is processed: the mine tailing that in the mine tailing that in fragmentation-washup flow process, desliming bucket obtains and Desliming process, No. two desliming buckets obtain all is admitted to thickening pond, first concentrate by thickening pond, filter through filter, the filter residue that obtains is as the 3rd byproduct: cement raw material again.
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| CN 201210113810 CN102626668B (en) | 2012-04-18 | 2012-04-18 | Efficient magnetic separation method for quartz sand |
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| CN102626668B true CN102626668B (en) | 2013-05-22 |
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| CN113145268A (en) * | 2021-03-14 | 2021-07-23 | 江苏鑫亿鼎石英科技股份有限公司 | Environment-friendly high-purity quartz sand treatment process for preparing transparent quartz tube |
| CN115178372A (en) * | 2021-04-01 | 2022-10-14 | 新沂市中大石英科技有限公司 | High-efficiency magnetic separation method for quartz sand |
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| CN115055276A (en) * | 2022-06-09 | 2022-09-16 | 赣州金环磁选科技装备股份有限公司 | Technological process for physical separation of oolitic hematite |
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