CN105060299A - Quartz sand purification technology - Google Patents

Abstract

The invention discloses a quartz sand purification technology comprising steps as follows: S1 crushing and screening; S2 scrubbing; S3 washing for mud removal: washing a material B with tap water for mud removal to obtain a quartz sand material C; S4 flotation; S5 ultrasonic treatment; S6 microbiological leaching: adding water to a material E to prepare quartz mortar, adding microbes for leaching iron removal operation, and then performing drying to obtain a finished quartz sand product. According to the technology, leaching iron removal is performed on the crushed quartz sand by the aid of alginate lyase producing strains, film iron or impregnated iron on surfaces of quartz sand particles can be removed, and the fineness of the quartz sand is increased.

Description

A kind of quartz sand purifying technique

Technical field

The present invention relates to glass sand technology of preparing technical field, specifically belong to a kind of quartz sand purifying technique.

Background technology

High-purity silicon dioxide is the very important photoelectron material of a class, is widely used in semi-conductor, optical fiber leads to flood, the high-tech sector such as laser and space flight.Along with developing rapidly of these fields, more strict to the requirement of foreign matter content in high-purity silicon dioxide, the demand of high-purity silicon dioxide is also increased day by day.High-purity silicon dioxide major part dependence on import needed for current China.Therefore, adopt quartz sand purifying technology, obtaining high-purity silicon dioxide, is meet the effective way of China's high-tech sector to HIGH-PURITY SILICON demand, has great importance to the development of promotion Chinese national economy.

Containing iron contamination in quartz sand, to obtain molten silicon micro mist, these iron contaminations must be removed.And when preparing molten silicon micro mist in prior art, usually adopt magnetic separation process, but this can only will remove the magnetic mineral comprising intergrowth particle, as impure minerals such as rhombohedral iron ore, limonite, biotite, ilmenite, pyrite and garnets, and for the film iron on quartz sand particle surface or the removal effect of dip-dye iron, unsatisfactory.

Summary of the invention

For the problems referred to above, the object of this invention is to provide a kind of quartz sand purifying technique, overcome the deficiencies in the prior art, utilize algin catenase producing strains to carry out leaching deironing to the quartz sand after pulverizing, the film iron on quartz sand particle surface can be removed or contaminate iron, improving quartz sand precision.

The technical solution used in the present invention is as follows:

A kind of quartz sand purifying technique, comprises the following steps:

S1 crushing and screening: adopt fragmentation, with screening plant, Raw material processing is become 20-40 object material A;

S2 cleans: material A is carried out mechanical scrub, obtains material B;

S3 washes desliming: adopt tap water to wash desliming to material B, obtain quartz sand material C;

S4 flotation: added water by material C and size mixing to concentration to be 22 ~ 28%, to add pore forming material, and add dilute sulphuric acid to pH=2.5, remove surfactant foam, the lower solid obtained, through super-dry, obtains material D;

S5 ultrasonication; In the medium medium of water and a small amount of dispersion agent, by the deposition quartzose sandstone particle powder of 0-15mm, obtain material E through ultrasonication;

S6 Microorganism Leaching: add water by described material E, be mixed with quartz mortar, and add microorganism carry out leaching deironing operation, then through super-dry, obtain quartz sand finished product.

Microorganism described in described S6 is algin catenase producing strains.

Compared with the prior art, beneficial effect of the present invention is as follows:

The present invention utilizes algin catenase producing strains to carry out leaching deironing to the quartz sand after pulverizing, the film iron on quartz sand particle surface can be removed or contaminate iron, make the clearance of Fe2O3 more than 78%, in selected rear quartz sand, the grade of Fe2O3 is low reaches 0.008%; Be optimized process to its each step, technique is simple, and impurity elimination is effective, can obtain SiO2 >=99.9%, Fe2O3≤0.008%, Al2O3≤0.06%, the fine and quality quartz sand of TiO2≤0.02%.

Embodiment

A kind of quartz sand purifying technique, comprises the following steps:

S1 crushing and screening: adopt fragmentation, with screening plant, Raw material processing is become 20-40 object material A;

S2 cleans: material A is carried out mechanical scrub, obtains material B;

S3 washes desliming: adopt tap water to wash desliming to material B, obtain quartz sand material C;

S4 flotation: added water by material C and size mixing to concentration to be 22 ~ 28%, to add pore forming material, and add dilute sulphuric acid to pH=2.5, remove surfactant foam, the lower solid obtained, through super-dry, obtains material D;

S5 ultrasonication; In the medium medium of water and a small amount of dispersion agent, by the deposition quartzose sandstone particle powder of 0-15mm, obtain material E through ultrasonication;

S6 Microorganism Leaching: add water by described material E, be mixed with quartz mortar, and add microorganism carry out leaching deironing operation, then through super-dry, obtain quartz sand finished product; Described microorganism is algin catenase producing strains; Utilize algin catenase producing strains to carry out leaching deironing to the quartz sand after pulverizing, can remove the film iron on quartz sand particle surface or contaminate iron, make the clearance of Fe2O3 more than 78%, in selected rear quartz sand, the grade of Fe2O3 is low reaches 0.008%; Be optimized process to its each step, technique is simple, and impurity elimination is effective, can obtain SiO2 >=99.9%, Fe2O3≤0.008%, Al2O3≤0.06%, the fine and quality quartz sand of TiO2≤0.02%.

More than show and describe ultimate principle of the present invention, principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification sheets just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.

Claims (2)

1. a quartz sand purifying technique, is characterized in that: comprise the following steps:

S1 crushing and screening: adopt fragmentation, with screening plant, Raw material processing is become 20-40 object material A

S2 cleans: material A is carried out mechanical scrub, obtains material B;

S3 washes desliming: adopt tap water to wash desliming to material B, obtain quartz sand material C;

S4 flotation: added water by material C and size mixing to concentration to be 22 ~ 28%, to add pore forming material, and add dilute sulphuric acid to pH=2.5, remove surfactant foam, the lower solid obtained, through super-dry, obtains material D;

S5 ultrasonication; In the medium medium of water and a small amount of dispersion agent, by the deposition quartzose sandstone particle powder of 0-15mm, obtain material E through ultrasonication;

S6 Microorganism Leaching: add water by described material E, be mixed with quartz mortar, and add microorganism carry out leaching deironing operation, then through super-dry, obtain quartz sand finished product.

2. a kind of quartz sand purifying technique according to claim 1, is characterized in that: the microorganism described in described S6 is algin catenase producing strains.