us7270706b2 roll crusher to produce high purity -- Henan Mining Machinery

us7270706b2 roll crusher to produce high purity

A method for removing metal surface contaminants from silicon metalloid. The method comprises sequentially contacting the silicon with gaseous hydrogen fluoride and then with an aqueous solution comprising at least one-half weight percent hydrogen peroxide. The method is especially useful as a means for recovering metal surface contaminants on semiconductor grade silicon for analysis of ...

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Roll Crusher an overview ScienceDirect Topics

6.2.3 Roll crusher circuit design. Roll crushers are generally not used as primary crushers for hard ores. Even for softer ores, such as chalcocite and chalcopyrite, they have been used as secondary crushers. Choke feeding is not advisable as it tends to produce particles of irregular size. Both open and closed circuit crushing is employed.
Roll crusher theory Allatt Mining Machinery

US7270706B2 - Roll crusher to produce high purity. A single roll crusher for comminuting high purity materials includes a roll with teeth spaced around the circumference of the roll. The roll is rotatably mounted inside a housing. The housing has a top with an …
silicon wafer crusher 1 mm screen samariter rubigen.ch

US7270706B2 - Roll crusher to produce high purity ... A single roll crusher for comminuting high purity materials includes a roll with teeth spaced around the circumference of the roll. The roll is rotatably mounted inside a housing. The housing has a top with an …
Equipments To Produce Silicon From Sand

Roll Crusher To Produce High Purity Polycrystalline Equipments To Produce Silicon From Sand. Polycrystalline silicon carbide crusher sbm is a hightech enterprise involved in research and development production sales and service as well in the past 20 years we are committed to the production of mining equipment sand making equipment industrial.
Roll Crusher C77ub7hu Roll utraconedane.pl

Roll crushers have a theoretical MAXIMUM reduction ratio of 41 If a 2 inch particle is fed to the roll crusher the absolute smallest size one could expect from the crusher is 12 inch Roll crushers will only crush material down to a minimum particle size of about 10 Mesh 2 mm A roll crusher crushes using compression with two rolls.
US7270706B2 Roll crusher to produce high purity

US7270706B2 - Roll crusher to produce high purity polycrystalline silicon chips - Google Patents. A single roll crusher for comminuting high purity materials includes a roll with teeth spaced...
Tungsten Crushing For Roll Crusher

US7270706B2 - Roll crusher to produce high purity ... The roll, teeth, and at least the inside surfaces of the top, sides, and bottom are fabricated from a material of construction that minimizes contamination of silicon. The material of construction may be tungsten carbide with a cobalt binder. The single roll crusher
Terry Horstman Senior Manufacturing Engineer Nexteer

Roll crusher to produce high purity polycrystalline silicon chips United States 7,270,706. Groups Dow Corning Alumni Dow Corning Alumni ...
US5165548A Rotary silicon screen Google Patents

US5165548A US07/709,261 US70926191A US5165548A US 5165548 A US5165548 A US 5165548A US 70926191 A US70926191 A US 70926191A US 5165548 A US5165548 A US 5165548A Authority US United States Prior art keywords semiconductor grade grade silicon spacers cylindrical screen pieces Prior art date 1990-04-23 Legal status (The legal status is an assumption and is not a legal conclusion.