CN115724431A - Quartz sand purification method - Google Patents
Quartz sand purification method Download PDFInfo
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- CN115724431A CN115724431A CN202111025969.0A CN202111025969A CN115724431A CN 115724431 A CN115724431 A CN 115724431A CN 202111025969 A CN202111025969 A CN 202111025969A CN 115724431 A CN115724431 A CN 115724431A
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Abstract
The invention discloses a quartz sand purification method, which comprises the steps of selecting quartz raw ore to be processed, removing obvious impurities and foreign matters in the quartz raw ore, and then conveying the quartz raw ore from which the obvious impurities and the foreign matters are removed to a jaw crusher for crushing treatment, wherein the crushing specification of the quartz raw ore is 0.5-2cm; sending the crushed quartz particles to a spiral ore washer for stone washing treatment, dewatering and screening, sending to a cone crusher for secondary refining and crushing, and screening the crushed quartz particles subjected to secondary crushing by a cylindrical screen for 4-120 meshes to obtain quartz fine sand below 0.5cm and quartz particle blocks of 0.5-2 cm. The quartz sand is purified by acid washing, and in the acid washing process, iron and the like are changed into ions by solid hydrochloric acid and are dissolved out of an oxide skin or a wampee on the surface of steel, so that the purification of the quartz sand can be facilitated to be higher in quality.
Description
Technical Field
The invention belongs to the technical field of quartz sand purification, and particularly relates to a quartz sand purification method.
Background
The high-purity quartz sand generally refers to quartz micropowder with SiO2 content higher than 99.9%, and is mainly applied to industries of IC integrated circuits, quartz glass and the like, and high-grade products of the high-purity quartz sand are more widely applied to large-scale and super-large-scale integrated circuits, optical fibers, lasers, aerospace and military. The high-purity quartz sand is a neutral inorganic filler, does not contain crystal water, does not participate in chemical reaction of a filled material, is a very stable mineral filler, is widely applied to plastics, rubber, ceramics and coatings, can increase various new functions of products, and can save a large amount of raw materials.
The main process flow for producing high-purity quartz sand in China at present comprises the following steps: the method comprises the following steps of washing silt from raw ore silica by an ore washer, roasting for 6 hours in a roasting furnace through a quartz material after coarse crushing by a crusher, dragging the quartz material into clear water for water quenching after roasting, manually sorting out impurities, then crushing and sieving by the crusher to obtain quartz sand, wherein the existing purification industry is complicated, the purification quality needs to be improved, and an efficient acid washing and magnetic separation mechanism is lacked for auxiliary treatment. Therefore, a quartz sand purification method is provided.
Disclosure of Invention
The invention aims to provide a quartz sand purification method to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a quartz sand purification method comprises the following steps:
the method comprises the following steps: material distribution
1. Selecting quartz raw ore to be processed, removing obvious impurities and foreign matters in the quartz raw ore, and then conveying the quartz raw ore from which the obvious impurities and foreign matters are removed to a jaw crusher for crushing treatment, wherein the crushing specification of the quartz raw ore is 0.5-2cm;
2. sending crushed quartz particles to a spiral ore washer for stone washing treatment, sending the crushed quartz particles to a cone crusher for secondary refining crushing after dewatering and screening, and screening the crushed quartz particles subjected to secondary crushing by a cylindrical screen through a 4-120-mesh screen to obtain quartz fine sand below 0.5cm and quartz particle blocks of 0.5-2cm;
3. selecting a high-gradient magnetic separator with the magnetic field intensity of 50-15000 gauss, and respectively carrying out magnetic separation treatment on the obtained quartz fine sand with the thickness of less than 0.5cm and the quartz particle block with the thickness of 0.5-2cm so as to remove weak magnetic and extremely weak magnetic minerals in the quartz material;
step two: acid pickling
1. Respectively sending the quartz fine sand with the size of less than 0.5cm and the quartz particle blocks with the size of 0.5-2cm obtained after magnetic separation to an acid washing unit, wherein the acid washing unit comprises a cold acid storage tank, an acid sand reaction tank, a hot acid storage tank, an acid heater, a steam furnace, an acid mixing pool, a solid-liquid proportioning box and a ceramic centrifugal deacidification machine, a circle of branch pipes are assembled in the acid sand reaction tank, nozzles are distributed and assembled at the water outlets of the branch pipes, and a porous sieve plate is assembled in the acid sand reaction tank and positioned at the bottom of the branch pipes;
2. feeding quartz fine sand below 0.5cm and quartz granules of 0.5-2cm from the top of an acid sand reaction tank respectively, feeding cold acid in a cold acid storage tank into an acid heater through a circulating pump, synchronously feeding steam into the acid heater through a steam furnace to heat the cold acid, pumping the heated hot acid into a branch pipe through a liquid pump, spraying the hot acid out of a nozzle to acid-wash quartz sand materials entering the acid sand reaction tank, filtering and recycling acid-wash liquid after acid-wash, feeding the acid-washed quartz sand into a solid-liquid proportioning box, and then feeding the quartz sand into a ceramic centrifugal deacidification machine to dehydrate the acid-washed quartz sand to obtain finished sand with the water content of 6%;
step three: washing with water
Primarily cleaning the obtained finished sand with the water content of 6% through a desliming hopper, secondarily cleaning the finished sand through a spiral stone washer, cleaning the finished sand until the finished sand is neutral by using deionized water, primarily dehydrating the cleaned quartz sand material through two sets of dehydrating screens, and then drying the quartz sand material in a dryer;
step four: color sorting package
Screening the dried quartz sand by a cylinder screen for 4-120 meshes, feeding the quartz sand of 0.5-2cm into a clean water tank, then carrying out color sorting and screening by a group of color sorting machines, crushing to form a quartz sand material of 0.5-1.5cm, then carrying out vacuum packaging after screening by a group of sand making machines, and feeding the quartz sand material below 0.5cm into two groups of color sorting machines for color sorting and screening, and carrying out vacuum packaging after screening by two groups of sand making machines.
Further, when the magnetic concentrator works, the magnetic field is 6000-8000 gauss.
Further, the acid heater is a graphite heat exchanger.
Furthermore, the pickling solution stored in the cold acid storage tank is oxalic acid, the heating temperature of the oxalic acid is 30-50 ℃, the steam pressure used is 2.5Pa, the electromagnetic valve is closed when the temperature of the oxalic acid in the storage tank is higher than 50 ℃, and the electromagnetic valve is opened when the temperature of the oxalic acid in the storage tank is lower than 50 ℃; the part is controlled by the control cabinet, thereby saving energy.
Further, the dryer is an inner-tube type drum dryer, and the dryer is provided with a moisture dust removing device and a smoke dust removing device.
Compared with the prior art, the invention has the beneficial effects that:
1. the quartz sand is purified by acid washing, in the acid washing process, iron and the like are changed into ions by solid hydrochloric acid and are dissolved out from an oxide skin or a wampee on the surface of the steel, so that the acid washing solution is changed into a mixture of acid, metal ions and metal compounds, and the mixture contains iron ions and fluoride ions besides free metal ions and acid.
2. The iron content of the iron concentrate powder after magnetic separation can reach 68-70%, the combined process method has the advantages that the ore utilization rate can reach 90%, the water consumption in the process is low, the water is saved, the cost is reduced, the pollution is reduced, the dust in the magnetic separation is collected by a dust removal device, the air pollution cannot be caused, and the method is an inventive process method which has high production efficiency, good product quality and no environmental pollution.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A quartz sand purification method comprises the following steps:
the method comprises the following steps: material distribution
1. Selecting quartz raw ore to be processed, removing obvious impurities and foreign matters in the quartz raw ore, and then conveying the quartz raw ore from which the obvious impurities and foreign matters are removed to a jaw crusher for crushing treatment, wherein the crushing specification of the quartz raw ore is 0.5cm;
2. sending crushed quartz particles to a spiral ore washer for stone washing treatment, sending the crushed quartz particles to a cone crusher for secondary refining crushing after dewatering and screening, and screening the crushed quartz particles subjected to secondary crushing through a cylindrical screen for 4 meshes to obtain quartz fine sand below 0.5cm and quartz particle blocks below 0.5cm;
3. selecting a high-gradient magnetic separator with the magnetic field intensity of 50 Gauss, and respectively carrying out magnetic separation treatment on the obtained quartz fine sand with the density of less than 0.5cm and the obtained quartz particle block with the density of 0.5cm so as to remove weak magnetic and extremely weak magnetic minerals in the quartz material;
step two: acid pickling
1. Respectively sending the quartz fine sand with the particle size of less than 0.5cm and the quartz particle block with the particle size of 0.5cm obtained after magnetic separation to an acid washing unit, wherein the acid washing unit comprises a cold acid storage tank, an acid sand reaction tank, a hot acid storage tank, an acid heater, a steam furnace, an acid mixing pool, a solid-liquid proportioning box and a ceramic centrifugal deacidifying machine, a circle of branch pipes are assembled in the acid sand reaction tank, nozzles are distributed and assembled at the water outlets of the branch pipes, and a porous sieve plate is assembled in the acid sand reaction tank and positioned at the bottoms of the branch pipes;
2. feeding quartz fine sand below 0.5cm and quartz granules below 0.5cm from the top of an acid sand reaction tank respectively, feeding cold acid in a cold acid storage tank into an acid heater through a circulating pump, synchronously feeding steam into the acid heater through a steam furnace to heat the cold acid, then pumping the heated hot acid into a branch pipe through a liquid pump, spraying the hot acid out of a nozzle to acid-wash the quartz sand material entering the acid sand reaction tank, filtering and recycling acid-wash liquid after acid-wash, feeding the acid-washed quartz sand into a solid-liquid proportioning box, and then feeding the quartz sand into a ceramic centrifugal deacidification machine to dehydrate the acid-washed quartz sand to obtain finished product sand with the water content of 6%;
step three: washing with water
Primarily cleaning the obtained finished sand with the water content of 6% through a desliming hopper, then secondarily cleaning the finished sand through a spiral stone washer, cleaning the finished sand until the finished sand is neutral by using deionized water, primarily dehydrating the cleaned quartz sand through two groups of dehydrating screens, and then drying the quartz sand by a dryer;
step four: color sorting package
And (2) screening the dried quartz sand by a cylindrical screen for 4 meshes, feeding the quartz sand of 0.5cm into a water purification tank, carrying out color sorting and screening by a group of color sorting machines, crushing to form a quartz sand material of 0.5cm, screening by a group of sand making machines, carrying out vacuum packaging, feeding the quartz sand material of less than 0.5cm into two groups of color sorting machines for color sorting and screening, screening by two groups of sand making machines, and carrying out vacuum packaging.
When the magnetic concentrator works, the magnetic field is 6000 gauss.
Wherein the acid heater is a graphite heat exchanger.
Wherein, the acid washing liquid stored in the cold acid storage tank is oxalic acid, the heating temperature of the oxalic acid is 30-50 ℃, the used steam pressure is 2.5Pa, the electromagnetic valve is closed when the temperature of the oxalic acid in the storage tank is higher than 50 ℃, and the electromagnetic valve is opened when the temperature is lower than 50 ℃; the part is controlled by the control cabinet, thereby saving energy.
The dryer is an inner-tube type drum dryer and is provided with moisture dust removing equipment and smoke dust removing equipment.
Example 2
A quartz sand purification method comprises the following steps:
the method comprises the following steps: material distribution
1. Selecting quartz raw ore to be processed, removing obvious impurities and foreign matters in the quartz raw ore, and then conveying the quartz raw ore from which the obvious impurities and foreign matters are removed to a jaw crusher for crushing treatment, wherein the crushing specification of the quartz raw ore is 2cm;
2. sending crushed quartz particles to a spiral ore washer for stone washing treatment, sending the crushed quartz particles to a cone crusher for secondary refining crushing after dewatering and screening, and then screening the crushed quartz particles subjected to secondary crushing through a cylindrical screen for 120 meshes to obtain quartz fine sand below 0.5cm and quartz particle blocks below 2cm;
3. selecting a high-gradient magnetic separator with the magnetic field intensity of 15000 gauss, and respectively carrying out magnetic separation treatment on the obtained quartz fine sand with the density of less than 0.5cm and the quartz particle block with the density of 2cm so as to remove weak magnetic and extremely weak magnetic minerals in the quartz material;
step two: acid pickling
1. Respectively sending the quartz fine sand with the size of less than 0.5cm and the quartz particle block with the size of 2cm obtained after magnetic separation to an acid washing unit, wherein the acid washing unit comprises a cold acid storage tank, an acid sand reaction tank, a hot acid storage tank, an acid heater, a steam furnace, an acid mixing tank, a solid-liquid proportioning box and a ceramic centrifugal deacidification machine, a circle of branch pipes are assembled in the acid sand reaction tank, nozzles are assembled at the water outlets of the branch pipes in a distributed manner, and a porous sieve plate is assembled in the acid sand reaction tank and positioned at the bottom of the branch pipes;
2. feeding quartz fine sand below 0.5cm and quartz granules below 2cm from the top of an acid sand reaction tank respectively, feeding cold acid in a cold acid storage tank into an acid heater through a circulating pump, synchronously feeding steam into the acid heater through a steam furnace to heat the cold acid, then pumping the heated hot acid into a branch pipe through a liquid pump, spraying the hot acid out of a nozzle to acid-wash the quartz sand material entering the acid sand reaction tank, filtering and recovering the acid-wash liquid after the acid-wash is finished, feeding the acid-washed quartz sand into a solid-liquid proportioning box, and then feeding the quartz sand into a ceramic centrifugal deacidification machine to dehydrate the acid-washed quartz sand to obtain finished product sand with the water content of 6%;
step three: washing with water
Primarily cleaning the obtained finished sand with the water content of 6% through a desliming hopper, then secondarily cleaning the finished sand through a spiral stone washer, cleaning the finished sand until the finished sand is neutral by using deionized water, primarily dehydrating the cleaned quartz sand through two groups of dehydrating screens, and then drying the quartz sand by a dryer;
step four: color sorting package
And (2) screening the dried quartz sand by a cylindrical screen for 120 meshes, feeding the quartz sand of 2cm into a clean water tank, then carrying out color sorting and screening by a group of color sorting machines, crushing to form quartz sand material of 1.5cm, then carrying out vacuum packaging after screening by a group of sand making machines, and feeding the quartz sand material of less than 0.5cm into two groups of color sorting machines for color sorting and screening, and carrying out vacuum packaging after screening by two groups of sand making machines.
Wherein, when the magnetic concentrator works, the magnetic field is 8000 gauss.
Wherein the acid heater is a graphite heat exchanger.
The pickling solution stored in the cold acid storage tank is oxalic acid, the heating temperature of the oxalic acid is 50 ℃, the steam pressure used is 2.5Pa, the electromagnetic valve is closed when the temperature of the oxalic acid in the storage tank is higher than 50 ℃, and the electromagnetic valve is opened when the temperature of the oxalic acid in the storage tank is lower than 50 ℃; the part is controlled by the control cabinet, so that energy is saved.
The dryer is an inner-tube type drum dryer and is provided with moisture dust removing equipment and smoke dust removing equipment.
The working principle and the using process of the invention are as follows: selecting quartz raw ore to be processed, removing obvious impurities and foreign matters in the quartz raw ore, and then conveying the quartz raw ore from which the obvious impurities and foreign matters are removed to a jaw crusher for crushing treatment, wherein the crushing specification of the quartz raw ore is 0.5-2cm; sending crushed quartz particles to a spiral ore washer for stone washing treatment, sending the crushed quartz particles to a cone crusher for secondary refining crushing after dewatering and screening, and screening the crushed quartz particles subjected to secondary crushing by a cylindrical screen through a 4-120-mesh screen to obtain quartz fine sand below 0.5cm and quartz particle blocks of 0.5-2cm; selecting a high-gradient magnetic separator with the magnetic field intensity of 50-15000 gauss, and respectively carrying out magnetic separation treatment on the obtained quartz fine sand with the thickness of less than 0.5cm and the quartz particle block with the thickness of 0.5-2cm so as to remove weak magnetic and extremely weak magnetic minerals in the quartz material; respectively sending the quartz fine sand below 0.5cm and the quartz particle blocks below 0.5-2cm obtained after magnetic separation to an acid washing machine set, wherein the acid washing machine set comprises a cold acid storage tank, an acid sand reaction tank, a hot acid storage tank, an acid heater, a steam furnace, an acid mixing pool, a solid-liquid proportioning box and a ceramic centrifugal deacidifying machine, a circle of branch pipes are assembled in the acid sand reaction tank, nozzles are distributed and assembled at the water outlets of the branch pipes, and a porous sieve plate is assembled in the acid sand reaction tank and positioned at the bottom of the branch pipes; feeding quartz fine sand below 0.5cm and quartz granules of 0.5-2cm from the top of an acid sand reaction tank respectively, feeding cold acid in a cold acid storage tank into an acid heater through a circulating pump, synchronously feeding steam into the acid heater through a steam furnace to heat the cold acid, pumping the heated hot acid into a branch pipe through a liquid pump, spraying the hot acid out of a nozzle to acid-wash quartz sand materials entering the acid sand reaction tank, filtering and recycling acid-wash liquid after acid-wash, feeding the acid-washed quartz sand into a solid-liquid proportioning box, and then feeding the quartz sand into a ceramic centrifugal deacidification machine to dehydrate the acid-washed quartz sand to obtain finished sand with the water content of 6%; primarily cleaning the obtained finished sand with the water content of 6% through a desliming hopper, then secondarily cleaning the finished sand through a spiral stone washer, cleaning the finished sand until the finished sand is neutral by using deionized water, primarily dehydrating the cleaned quartz sand through two groups of dehydrating screens, and then drying the quartz sand by a dryer; screening the dried quartz sand by a cylinder screen for 4-120 meshes, feeding the quartz sand of 0.5-2cm into a clean water tank, then carrying out color sorting and screening by a group of color sorting machines, crushing to form a quartz sand material of 0.5-1.5cm, then carrying out vacuum packaging after screening by a group of sand making machines, and feeding the quartz sand material below 0.5cm into two groups of color sorting machines for color sorting and screening, and carrying out vacuum packaging after screening by two groups of sand making machines.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. A quartz sand purification method is characterized by comprising the following steps:
the method comprises the following steps: material distribution
1. Selecting quartz raw ore to be processed, removing obvious impurities and foreign matters in the quartz raw ore, and then conveying the quartz raw ore from which the obvious impurities and foreign matters are removed to a jaw crusher for crushing treatment, wherein the crushing specification of the quartz raw ore is 0.5-2cm;
2. sending the crushed quartz particles to a spiral ore washer for stone washing treatment, dewatering and screening, sending to a cone crusher for secondary refining crushing, and screening the crushed quartz particles subjected to secondary crushing by a cylindrical screen through 4-120 meshes to obtain quartz fine sand below 0.5cm and quartz particle blocks of 0.5-2cm;
3. selecting a high-gradient magnetic separator with the magnetic field intensity of 50-15000 gauss, and respectively carrying out magnetic separation treatment on the obtained quartz fine sand with the thickness of less than 0.5cm and the quartz particle block with the thickness of 0.5-2cm so as to remove weak magnetic and extremely weak magnetic minerals in the quartz material;
step two: acid pickling
1. Respectively sending the quartz fine sand with the size of less than 0.5cm and the quartz particle blocks with the size of 0.5-2cm obtained after magnetic separation to an acid washing unit, wherein the acid washing unit comprises a cold acid storage tank, an acid sand reaction tank, a hot acid storage tank, an acid heater, a steam furnace, an acid mixing pool, a solid-liquid proportioning box and a ceramic centrifugal deacidification machine, a circle of branch pipes are assembled in the acid sand reaction tank, nozzles are distributed and assembled at the water outlets of the branch pipes, and a porous sieve plate is assembled in the acid sand reaction tank and positioned at the bottom of the branch pipes;
2. feeding quartz fine sand below 0.5cm and quartz grain blocks of 0.5-2cm from the top of an acid sand reaction tank respectively, feeding cold acid in a cold acid storage tank into an acid heater through a circulating pump, synchronously feeding steam into the acid heater through a steam furnace to heat the cold acid, pumping the heated hot acid into a branch pipe through a liquid pump, spraying the hot acid out of a nozzle to pickle the quartz sand material in the acid sand reaction tank, filtering and recovering pickling liquid after pickling is finished, feeding the quartz sand after pickling into a solid-liquid proportioning box, and then feeding the quartz sand after pickling into a ceramic centrifugal deacidification machine to dehydrate the quartz sand after pickling to obtain finished sand with the water content of 6%;
step three: washing with water
Primarily cleaning the obtained finished sand with the water content of 6% through a desliming hopper, then secondarily cleaning the finished sand through a spiral stone washer, cleaning the finished sand until the finished sand is neutral by using deionized water, primarily dehydrating the cleaned quartz sand through two groups of dehydrating screens, and then drying the quartz sand by a dryer;
step four: color sorting package
And (2) screening the dried quartz sand by a cylindrical screen for 4-120 meshes, feeding the quartz sand of 0.5-2cm into a water purification tank, then carrying out color sorting and screening by a group of color sorting machines, crushing to form a quartz sand material of 0.5-1.5cm, then carrying out vacuum packaging after screening by a group of sand making machines, feeding the quartz sand material of less than 0.5cm into two groups of color sorting machines for color sorting and screening, and carrying out vacuum packaging after screening by two groups of sand making machines.
2. The method for purifying quartz sand according to claim 1, wherein: when the magnetic concentrator works, the magnetic field is 6000-8000 gauss.
3. The method for purifying quartz sand according to claim 1, wherein: the acid heater is a graphite heat exchanger.
4. The method for purifying quartz sand according to claim 1, wherein: the pickling solution stored in the cold acid storage tank is oxalic acid, the heating temperature of the oxalic acid is 30-50 ℃, the steam pressure used is 2.5Pa, the electromagnetic valve is closed when the temperature of the oxalic acid in the storage tank is higher than 50 ℃, and the electromagnetic valve is opened when the temperature of the oxalic acid in the storage tank is lower than 50 ℃; the part is controlled by the control cabinet, thereby saving energy.
5. The method for purifying quartz sand according to claim 1, wherein: the dryer is an inner pipe type drum dryer and is provided with moisture dust removing equipment and smoke dust removing equipment.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118373425A (en) * | 2024-04-17 | 2024-07-23 | 五莲晨鸣新材料有限公司 | Purification equipment and method for producing high-purity quartz sand |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN118373425A (en) * | 2024-04-17 | 2024-07-23 | 五莲晨鸣新材料有限公司 | Purification equipment and method for producing high-purity quartz sand |
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