What Is Diosmectite?
Silica [1] (quartz stone) is a general term for vein quartz, quartzite, and quartz sandstone. Mainly used in acid refractory bricks for metallurgical industry. Pure silica can be used as quartz glass or refined single crystal silicon. The appearance of crystalline silica is generally milky white, off-white, light yellow, and reddish brown. It has bright luster, smooth and continuous cross section, with sharp edges and corners, with great hardness and strength. Vein quartz is compact, pure white, translucent, oily and shiny, and has a shell-shaped section. The quartz crystal particles are mostly above 2mm, which can be discerned by the naked eye. It is used in the chemical industry to prepare silicon compounds and silicates, and can also be used as a filler for sulfuric acid towers. The building materials industry is used for glass, ceramics, portland cement, etc. It can be used as the raw material for the smelting of iron alloys such as industrial silicon.
- Appearance
- The appearance properties are mainly the shape, section, color, gloss, and inclusions of silica. From the appearance, it can be initially determined whether the silica is crystalline silica, cemented silica, vein vein, etc. [1]
- Silica is
- In addition to the main mineral quartz, silica is usually accompanied by impurity minerals such as feldspar, mica, clay and iron. The prepared high-purity and ultra-high-purity quartz raw materials are impurities other than silicon dioxide.The main harmful impurities are iron-containing and aluminum-containing impurities. Therefore, the progress and improvement of the purification method and process of silicon raw materials are also mainly Reflected in the effective removal of iron and aluminum impurities [4]
- According to the state of impurities and inclusions of silica mineral raw materials, in the beneficiation and purification process, there are mainly scrubbing-magnetic separation-flotation-acid leaching and other processes.With the continuous research of beneficiation technology, electrical separation and biological Beneficiation, etc. [4]
- ZBD 53001-1990
- China's industry standard (ZB D53001-90) has stipulated the quality standards of silica for refractories, as listed in Table 1-8. Waste silica, breccia-like silica, weathered rocks, etc. shall not be mixed into the silica, and no impurities exceeding 1 mm thick are allowed on the surface, and various harmful inclusions with a diameter greater than 5 mm are not allowed in the silica block.
- Table 1-8 Technical conditions of silica
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- YB / T 5268-2007
- The latest standard YB / T 5268-2007 silica
- This standard replaces YB / T5268-1999 "silica"
- The main differences between this standard and YB / T5268-1999 are as follows:
- Added grades;
- Modified the method of branding;
- Modified the expression method of fire resistance from temperature to cone number;
- The requirement of water absorption rate has been cancelled;
- Added inspection batch.
- This standard is proposed by China Iron and Steel Industry Association.
- This standard is under the jurisdiction of the Institute of Information Standards for Metallurgical Industry.
- The main drafting organizations of this standard are: Information Standard Research Institute of Metallurgical Industry, Xixiaoping Refractories Co., Ltd.
- The main drafters of this standard: Gao Jianping and Hao Liangjun.
- The previous versions of the standards replaced by this standard are:
- YB 2416-1981, YBD 53001-1990, YB / T 5268-1999
- 1 Scope
- This standard specifies the classification and brand, technical requirements, test methods, inspection rules, packaging, marking, transportation, storage and quality certificates of silica.
- This standard applies to refractory materials, aluminum alloys and silica for industrial silicon.
- 2 Normative references
- The clauses in the following documents have become the clauses of this standard after being referenced. For dated references, all subsequent amendments (excluding the content of errata) or revisions are not applicable to this standard, however, all parties who have reached an agreement under this standard are encouraged to study whether the latest versions of these documents are applicable . For undated references, the latest version applies to this standard.
- GB / T 2007.1-1987 General rules for sampling and preparation of bulk mineral products
- GB / T 2007.2-1987 General rules for sampling and sample preparation of bulk mineral products
- GB / T 6901.2-1986 Methods for chemical analysis of siliceous refractories Weight-Molybdenum blue photometric method for determination of silicon dioxide
- GB / T6901.3-1986 Methods for chemical analysis of siliceous refractories. Hydrofluoric acid gravimetric method for determination of silica content.
- GB / T 6901.4-1986 Methods for chemical analysis of siliceous refractories Spectrophotometric determination of ferric oxide by o-diazaphenanthrene
- GB / T 6901.5-1986 Methods for chemical analysis of siliceous refractories Chromazurol S spectrophotometric method for the determination of alumina content
- GB / T 6901.6-1986 Methods for chemical analysis of siliceous refractories EDTA volumetric method for the determination of alumina content
- GB / T 6901.7-1986 Methods for chemical analysis of siliceous refractories Diantipyrine methane photometric method for the determination of titanium dioxide
- GB / T 6901.8-1986 Methods for chemical analysis of siliceous refractories Atomic absorption spectrophotometric method for the determination of calcium oxide and magnesium oxide
- GB / T 6901.11-1986 Methods for chemical analysis of siliceous refractories Molybdenum blue photometric method for the determination of phosphorus pentoxide
- ...
- 3 Classification and grade
- 4 Technical requirements
- 5 Test method
- 6 Inspection rules
- 7 Packaging, marking, transport, storage and quality certificates [1]
- The latest standard YB / T 5268-2014 "silica"