Quartz sand

quartz Sand is quartz Quartz grain crushing processed. Quartz stone is a kind of non metallic minerals, is a hard, wear resistance, chemical stability Silicate minerals The main mineral composition is SiO2. Quartz sand color is white, colorless or translucent, Mohs hardness 7.
Quartz sand
Quartz sand is an important industrial mineral raw material, non hazardous chemicals, widely used in glass, casting, ceramics and refractories, smelting, metallurgy, metallurgy, construction, chemical solvent, plastic, rubber, abrasive, filter material Industrial.

Quartz sand brief introduction

Quartz sand is a hard, wear resistance, chemical stability Silicate minerals The main. Mineral composition Is SiO2, quartz sand color Opal Color, colorless or translucent, hardness 7, no brittle cleavage Conchoidal fracture, Oil sheen And the density of 2.65, Bulk density (1-20 1.6~1.8), 20-200 was 1.5, the chemical, thermal and Mechanical properties Has the obvious anisotropy, insoluble in acid, slightly soluble in KOH solution, the melting point of 1750 DEG C.
Common specifications: 0.5-1 quartz sand Mm 2-4mm, 4-8mm, 1-2mm, 8-16mm, 10-20, 16-32mm, 20-40, mesh, 40-80 mesh, 100-120 mesh.
Quartz sand is a colorless, transparent quartz variants, the Greeks called "Krystallos", meaning "white ice", they are sure that quartz is durable and solid ice. The ancient people think China mouth cold crystal can quench your thirst. Is the consolidation of quartz sandstone clastic rocks, clastic quartz content reaches above 95%, from a variety of magmatite, sedimentary rocks and metamorphic rocks, heavy mineral less, associated minerals include feldspar, mica and clay minerals. The quartz rocks sedimentary origin and metamorphic origin of two kinds, the former boundaries of clastic particles and cements are not obvious, the latter refers to the degree of metamorphism, deep pure quartzite ore. Quartz is formed by hydrothermal process, which is almost entirely composed of quartz, dense massive structure.
Changes of mineral content in quartz sand, dominated by quartz, followed by feldspar , mica And cuttings, Heavy mineral , Clay Mineral.

Quartz sand The main classification

quartz Has high fireproof performance, industry of quartz sand are often divided into: Ordinary quartz sand , Refined quartz sand , glass sand Fused quartz sand and. Microsilica Etc..

Quartz sand Ordinary quartz sand

Ordinary quartz sand That is, SiO2 = 90 - 99% = 0.06 - 0.02% Fe2O3, refractoriness 1750 C, appearance: the surface part of the large granule have yellow cyst. Ordinary quartz sand is made of natural quartz ore, after crushing, washing, drying, a water filter and the two filter; the filter material has no impurities, no edges, high density, high mechanical strength, load carrying capacity line of long service life and is an ideal material for chemical water treatment. The size range of 5 - 220, according to user requirements size production. Main uses: metallurgy, black silicon carbide, Glass And glass products, enamel Cast steel, water filtration, Sodium silicate Chemical industry, spray.

Quartz sand Refined quartz sand

 Fine quartz sand Fine quartz sand
Also called pickling quartz sand, SiO2 = 99 - 99.5% Fe2O3 0.005%, uses the high quality natural quartz sand, mortar .

Quartz sand glass sand

 glass sand glass sand
SiO2 = 99.5 - 99.9% Fe2O3 0.001%, uses the high quality natural quartz, mortar . (mm mm)

Quartz sand Melting quartz sand

Chemical composition: SiO2 99.9-99.95% Fe2O3 5PPM-25PPM Max Li2O 1-2PPM Max Al2O3 20-30PPM Max
K2O 20-25PPM Max Na2O 10-20PPM max (PPM for the millionth unit)
Physical properties:
The appearance is colorless and transparent, massive, granular or white powder.
Relative proportion : 2.21;
Mohs hardness : 7;
PH: 6.

Quartz sand Microsilica

Silicon powder: the appearance of grey or grey white powder, refractory >1600 C. Bulk density: 200 ~ 250 kg / m3. The chemical composition of silica powder is shown in the table below:
project
SiO2
Al2O3
Fe2O3
MgO
CaO
NaO
PH
average value
From 75 to 96%
1 + 0.2%
0.9 + 0.3%
0.7 + 0.1%
0.3 + 0.1%
1.3 + 0.2%
neutral

project
SiO2
Al2O3
Fe2O3
MgO
CaO
NaO
PH
average value
From 75 to 96%
1 + 0.2%
0.9 + 0.3%
0.7 + 0.1%
0.3 + 0.1%
1.3 + 0.2%
neutral

Quartz sand Producing area

Quartz is usually divided into quartz, Asmanite Three kinds of silica, white. Basically consists of quartz grains consisting of unconsolidated broken rock called quartz sand.

Quartz sand The main origin

From the country concerned, quartz ore more widely. Quartz sand is made of natural quartz ore, quartz stone processing from mining out, crushing, screening, washing processing by. The appearance of a polygon, globose, pure white, has the characteristics of high mechanical strength, strong interception capability, good acid resistance etc.. General fineness within 120Mesh product called quartz sand. More than 120Mesh products called quartz powder. High quality mineral resources are mainly distributed in the Inner Mongolia Autonomous Region Jining, Anhui Province, Fengyang, Hubei, Huanggang, Hebei Lingshou County Production of high quality, there is also a small amount of the distribution in Guangdong and Jiangxi.

Quartz sand market demand

quartz , refractory materials, smelting ferrosilicon, metallurgical flux, ceramics, abrasive materials, casting, quartz stone in the construction of the strong acid medium erosion ability, for the production of acid resistant concrete and mortar acid.
Silicon dioxide do
 White quartz sand White quartz sand
The foundation plays an important irreplaceable role in the production and supply of raw materials for the core silicon raw material in silicon raw material in. It is a unique physical, chemical and optical properties, which plays a more and more important role in many high-tech products such as computer chips, core technology products, IT industry, Light-guide fiber The electronics industry, the resonator, new power source, high insulation sealing materials, aerospace equipment, military technology, special optical glass, Chemical analysis instrument Wait, all cannot do without these basic raw materials. Shi Ke beautiful quartz crystallization and shape for glasses and valuable handicrafts, usingpiezoelectricquartzcrystal, can be made without frequency stabilizer wire industry in the quartz filter. The production of lens, reflector, spectral tube, light guide and optical instruments in Prism And polarized lens. Has been widely usedhydrothermal made of synthetic quartz crystal used in the manufacture of piezoelectric element. In the chemical industry, quartz can be used forhigh temperatureequipment and ware; in the electrical appliance industry, often using quartz as excellent Insulating materials ; quartz is glass, enamel and Refractory bricks Good raw material in manufacturing industry; smelting quartz outstanding performance and it is widely used in metallurgy, food, pharmaceutical and paper industry In. Export of quartz (sand) are mostly used in metallurgical and refractory material industry.
Gray quartz tube, quartz tube, quartz tube, quartz tube black blue, but also the production of UV filter quartz tube, quartz tube, quartz bar quartz products.

Quartz sand application

 Ordinary quartz sand Ordinary quartz sand
The unique physical and chemical properties of quartz sand is, in the aerospace, electronics, machinery and today's rapid development IT industry Occupies a pivotal position, especially its crystal shape and internal structure of molecular chain, lattice Changes in the law, which has high temperature resistance, The coefficient of thermal expansion A small, highly insulated, Corrosion resistance , Piezoelectric effect Resonant effects and its unique optical properties, plays an increasingly important role in many high-tech products.
Quartz sand is an important industrial mineral raw material, non chemical Dangerous goods Widely used. Glass , casting, ceramics and Refractory material Smelting ferrosilicon Metallurgy flux , metallurgy, construction, chemical, plastic, rubber, Abrasive materials Industrial. Can the motor, train transport, water transport. Industrial production is generally 50KG or 25KG packaging and export tons of bags. Common specifications: 0.5-1.0mm 0.6-1.2mm 1-2mm 2-4mm 4-8mm 8-16mm 16-32mm. (mm mm Single
 glass sand glass sand
A).
A glass: Plate glass , Float glass And glass products ( Glass jar , Glass bottles , glass tube Etc.), optical glass , glass fibre Glass instrument, conductive glass, Glass cloth And anti ray Special glass The main raw material.
Two, ceramic and refractory materials: embryo material and porcelain glaze, kiln With high silica, silica and ordinary silicon carbide Other raw materials.
Three, metallurgy: silicon metal, ferrosilicon alloy and silicon Aluminium alloy Raw materials or additives, flux etc.
Four, building: Concrete , Cementitious materials And road building materials, Imitation marble , cement Physical performance test materials (cement standard sand).
Five, chemical compounds and silicon water glass Other raw materials, sulfuric acid tower filler, amorphous silica powder
Six: the main raw material, machinery casting sand, Abrasive materials ( Sand blasting And hard abrasive paper, Sandpaper , Sandcloth Etc.)
Seven: high purity, electronic Silicon metal And optical fiber communication
Eight, rubber, plastics: filler (which can improve the wear resistance)
Nine, paint filler (which can improve the acid resistance paint)
Ten, aviation and aerospace.
The application in the glass industry: flat glass, float glass, glass (glass jar, glass bottle, glass tube), the main raw material of optical glass, glass fiber, glass, conductive glass, glass cloth and anti ray special glass etc..
The second is used in ceramics: ceramics and refractories embryo material and porcelain glaze, with high silica, ordinary brick raw materials such as silicon carbide furnace; metallurgical silicon metal, ferrosilicon alloy and silicon Aluminum Alloy flux and other raw materials or additives of concrete, cementitious materials, road test material physical properties of materials, artificial marble, cement (cement standard sand).
Chemical applications: the main raw materials, grinding materials (sand, hard abrasive paper, sandpaper, emery cloth, etc.) of sand cleaning, derusting, descaling treatment of electronic high purity silicon metal, rubber, plastic optical fiber as filler (which can improve the wear resistance). Paint filler can improve the weatherability of coatings;
The second is applied in the field of casting, forging, machinery, metallurgy, heat treatment, steel structure, space truss structure, container, ship, building, bridge, mines, such as sand cleaning, derusting, strengthening, forming, eliminating surface cleaning and coating, electroplating and various profiles of the roughness (NAP) Pre processing, stone cutting, magnetic pill casting, as additives and heavy concrete blast furnace refractory material, to increase its wear resistance, high temperature resistance, anti erosion, electrostatic shielding, radiation proof, oil filtering tank, weight and so on.
Granite Marble, surface processing with high quality quartz sand as raw materials for sports venues lawn design and production of special products, with high hardness, than the major, uniform size, small edges and natural color characteristics of artificial turf damage, formation of protective effect of hair grass, the grass is more durable. The application of domestic college stadiums, quartz sand is an ideal material for the use of artificial site supporting the modern track and field, soccer, golf etc..

Quartz sand The application of quartz sand as water filter

Because of the three layers of filter bed quartz sand diameter than the double filter material of quartz sand and quartz sand under small, there is a layer of fine quality anthracite, so in the same conditions, even some high filtering speed under the condition of three layer filter after filtration water quality than double layer filter for good. When using quartz sand, as far as possible with the use of.
The vast majority of China's sewage treatment plant is the implementation of the "national B standard of urban sewage treatment plant pollutant discharge standard" in the implementation level of A standard can maximize the "nitrogen and phosphorus removal of sewage, reducing water pollution on the water can be used as a follow-up, the water back, to solve parts water shortage problems in china.

Quartz sand Quartz sand filter

The tail water of sewage treatment plant into the bottom of the filter through the water inlet pipe, the water distributor uniform water through the filter layer from top to bottom. In this process, the tail water is filtered, the removal of pollutants in water. At the same time, the pollutant content of quartz sand filter in the increase of pollutants and lower degree of filter layer is higher than the upper filter. This is located in the central open air filter will lift pump, sand washing device of quartz sand filter layer to the top of the filter in the cleaning. Cleaning sand return filter bed, while cleaning the pollutants discharged.
Quartz sand filter material is the top-down movement in the pump under the stirring action of the tail water. The filter media can be cleaned timely, anti shock capability of pollutant load. The internal structure of quartz sand filter and its own special characteristics, the coagulation, clarification and filtration in the same cell body can be completed.
   The technical characteristics of quartz sand filter
(1) quartz sand filter layer is thicker, deeper, higher construction cost.
(2) high filtration efficiency, good filtering effect, no downtime backwashing, low operation cost.
(3) the head loss is higher, the general need to set the two pumping station, increased operating costs.
(4) active sand filter can increase or decrease the number of filters flexibly according to the change of water, mainly suitable for small-scale sewage treatment plant.
Active sand filter is a filter device in continuous flocculation, clarification and filtration as a whole, widely used in drinking water, industrial water, sewage treatment and water reuse treatment. The system uses upflow filtration principle and homogeneous flow filter, filtering and washing sand at the same time, to 24 hours of continuous automatic operation, sand extracting ingenious and sand washing structure instead of traditional large power backwash system, low energy consumption.
Therefore, the urban sewage treatment plant upgrading and reconstruction of water environmental protection requirements, energy-saving emission reduction is also the national request.
Quartz sand filter is made of natural quartz ore as raw material, after crushing, fine sieve processing, is currently the most widely used in water purification materials, the largest amount of impurities, compression wear-resisting water treatment industry, high mechanical strength, chemical stability, sewage interception capability, high efficiency, long service life that is suitable for single and double filter, filter and ion exchanger, the indicators have reached the standard (CJ/T43-2005).  
   Quartz sand filter Mainly used in wastewater treatment, for 35 years no problem, as long as to prevent loss of quartz on the line, do not be contaminated because of tight, sewage treatment, sludge of aerobic or anaerobic respiration, the degradation of pollutants in sewage.
Common specifications: 0.5-1.0mm 0.6-1.2mm 1-2mm 2-4mm 4-8mm 8-16mm 16-32mm.
Physical and chemical analysis of refined quartz sand filter:
Analysis of the project
Identification of data
Analysis of the project
Identification of data
Analysis of the project
Identification of data
The content of SiO2
99.3%
Bulk density
1.75t/m3
Hydrochloric acid soluble rate
0.4%
Mohs hardness
Seven
Wear rate
0.3%
Acid resistance
Resistance to acid
boiling point
2550 C
Broken rate
0.35%
Alkali tolerance
Good alkali resistance
melting point
1750 C
Ash rate
0.25%
The content of Zn
0.005%
proportion
Two point six five
Void
43%
Other metal content
Do not exceed the national drinking water standard

Analysis of the project
Identification of data
Analysis of the project
Identification of data
Analysis of the project
Identification of data
The content of SiO2
99.3%
Bulk density
1.75t/m3
Hydrochloric acid soluble rate
0.4%
Mohs hardness
Seven
Wear rate
0.3%
Acid resistance
Resistance to acid
boiling point
2550 C
Broken rate
0.35%
Alkali tolerance
Good alkali resistance
melting point
1750 C
Ash rate
0.25%
The content of Zn
0.005%
proportion
Two point six five
Void
43%
Other metal content
Do not exceed the national drinking water standard

Quartz sand pickling

In order to eliminate the "raw material" quartz stone quartz sand diatomite The surface adsorption carrier, reduce peak delamination vector in the production and processing is needed before acid treatment. The carrier is pickling with hydrochloric acid leaching of 6mol/L for 2h or heating concentrated hydrochloric acid digestion 30min, filtration, washed with water to neutral, drying. Pickling can be removed on the surface of iron, aluminum and other impurities.

Quartz sand Purification method

Quartz sand purification process

Quartz sand on the grade of raw materials industry is more and more low, to meet the industrial demand, can improve the grade of the ore dressing process. The following main purification method:
1, Scrubbing and mud removal .
 Quartz sand raw materials Quartz sand raw materials
Scrub refers to the use of mechanical force and the grinding force between grains of quartz sand to remove the film on the surface of iron, bond and clay minerals and impurities without further these mineral aggregate monomer, and then by grading to further purification effect of quartz sand. The main rod friction cleaning and mechanical cleaning. The main factors influencing the cleaning effect for structure and configuration of the washing machine; the secondary factors for scrubbing time, scrubbing concentration (generally 50% - 60% concentration of scrub is appropriate). The main mechanical cleaning, scrubbing and grinding method for high power ultrasonic cleaning and scrubbing dosing etc..
2, magnetic separation .
Magnetic separator is mainly used to remove magnetic minerals in quartz sand, such as by removing strong magnetic machine Hematite , limonite , Black mica Weak magnetic minerals, and strong magnetic minerals such as magnetite can be removed by weak magnetic separator.
3, flotation .
Flotation is used to remove the quartz sand in feldspar, mica and some magnetic impurities can not be removed, to further improve its purity.
4, acid leaching .
Acid leaching by quartz is insoluble in acid (HF acid), and other mineral impurities can be dissolved characteristics of acid liquid, can achieve further purification of quartz.
5, microbial leaching .
Refers to the leaching of iron or iron impregnated film surface of quartz sand grains by microorganisms, which is a newly developed technique of iron removing.

Quartz sand production process

1, a large stone into the warehouse
2, thick broken
3, choose fine broken
4, sand making machine vibrating screen
5, sand washing machine to wash out the finished sand
6, drying machine drying or drying

Quartz sand Harm

In daily life, production and scientific research of quartz sand has an important purpose, but sometimes it may cause harm to human body.
Some silicon harmful substances such as asbestos. Asbestos is a fibrous silica mineral. Long term inhalation, may cause lung damage, these tiny asbestos fibers will be deposited in the alveoli, causing lung fibrosis gradually, then the impact of pulmonary gas exchange function.
Due to the non asbestos fibers, the naked eye can see, the general spread of it, can make prevention. The risk of exposure to asbestos, and without a safety limit. Basically, all kinds of asbestos are carcinogenic. So far, there has not been any drugs, surgery or radiation therapy, can cure asbestos related diseases.
In addition, asbestos will also cause lung cancer, mesothelioma of pleura and pleural lesions. Suffering from asbestos sink disease who later may cause bronchitis and lung fibrosis with pulmonary heart disease, lead to heart failure and death.
Quartz sand dust is very fine, the specific surface area reached 100 square meters above /g can be suspended in the air, if the long-term inhalation of dust containing quartz sand, will suffer from silicosis (formerly known as silicon for silicon, formerly known as silicosis silicosis).
Silicosis is an occupation disease, the incidence and severity of the content of quartz sand and dust content in the air depends on the dust, and the contact time. Long in the quartz sand dust content in high places, such as mining, foundry, sandblasting, ceramics, refractories and other places of work tend to suffer from the disease.
Therefore, in these more dust in the workplace, should take protective measures strictly, dust content using a variety of techniques and equipment to control the workplace, to ensure the health of the staff.

Quartz sand Industry dynamics

Quartz sand The harm of quartz dust

Through the detection, quartz sand processing enterprises have the following serious problems: one is the dust concentrations generally exceeded the national standard, the total dust concentration
 Quartz sand production Quartz sand production
The average exceed the standard 269.38 times, up to 1089.60 times; the average dust concentration exceed the standard 286.70 times, up to 1248.35 times. The two is in the dust of employees with great harm free Silicon dioxide High concentration detected in workplace dust free silica content was above 80%, the average content is 89.52%, up to 96.47%. The three is the vast majority of quartz sand processing enterprises, especially with an annual output of 20 thousand tons of small enterprises, especially the dry processing of small enterprises, processing technology is very backward, crushing, crushing, sieving, packaging and other key links are used in small equipment in tatters, and the whole process is open, produce the dust is very serious. Four is the most processing enterprise job site management confusion, especially with an annual output of 20 thousand tons of small enterprises, job site without any dust control measures and protective equipment, even the most basic anti-dust masks are not equipped with dust; working places, site management is in chaos. Especially in 2000 years, dust quartz sand processing enterprises harm group events caused by silicosis have occurred. Guizhou Province in 2003 occurred in East Lake village of Putian city in Fujian province Xianyou Jiaowei town of quartz sand factory workers migrant workers suffering from silicosis, the death of 18 people; 2009 Yunnan province Shuifu County, in Anhui County of Fengyang province quartz sand factory workers migrant workers with silicosis, killed 12 people and caused great attention of the Party Central Committee and the leaders of the State Council, and made important instructions. The severity of the country to a deep understanding of quartz sand processing enterprises dust hazards, rectification work to strengthen the dust harm of quartz sand processing enterprises.

Quartz sand To carry out clean-up restructuring

Each region should harm governance special action in the dust and high toxic substances in the area of quartz sand processing enterprises to conduct a comprehensive survey, accurately grasp the number, quartz sand processing enterprises in the region of the type and scale of production, the number of employees and the number of dust; tissue inspection inspection agency to the workplace quartz sand processing enterprise testing, a comprehensive understanding of quartz sand processing enterprises dust hazards in the region, dust-proof equipment set up and dust prevention and management etc.. The occupation health status of the region, especially the occupation health status of quartz sand processing enterprises to timely report to the local people's government, in accordance with the "State Council on Further Strengthening the elimination of backward production capacity of the notice" (Guo Fa 2010 No. 7), to the local people's government to overhaul the region of quartz sand processing enterprises, strict blow, resolutely ban illegal processing sites, in accordance with the overall planning, rational layout, integration and restructuring, enhance the scale of demand, restructuring, expand the scale of the implementation of the layout of small and medium-sized processing enterprises to promote mergers and acquisitions of large enterprises, small and medium enterprises, improve the level of dust hazard prevention. Until the end of June 2011, according to the occupation safety and health conditions with an annual output of 20 thousand tons of dry processing of small enterprises, and an annual output of 10 thousand tons of wet processing of small enterprises, to the local people's Government shall be closed, and will close the list of enterprises, the implementation of one by one. All localities should be to close the list of enterprises in October 15, 2010 reported to the State Administration of work safety.