Process for smelting macrocrystalline green silicon carbide
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A technology of green silicon carbide and process, which is applied in the field of large crystal green silicon carbide smelting process, can solve the problems of small green silicon carbide crystal grains, high smelting cost, unreasonable cloth, etc., and achieve compact and firm structure, high content, and reduce waste Effect
Active Publication Date: 2014-08-06
TONGHUA HONGXIN ABRASIVE
View PDF4 Cites 0 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
The disadvantage is that the material distribution in the furnace is unreasonable, the smelting cost is high, and the obtained green silicon carbide grains are small (1-3mm)
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0015] see figure 1 , 2 , the large crystal green silicon carbide smelting process includes the following steps: the secondary roasting process will purchase the quartz sand and petroleum coke that meet the quality requirements according to the formula of Si:C ratio of 1.48-1.54, and put them into the mixer for metering and stirring to achieve homogenization . The homogenized raw materials are transported into the furnace bottom (furnace bottom material area 1) for primary roasting, the furnace middle reaction zone III part material area 3, the furnace middle reaction zone IV part material area 4 and the furnace middle reaction zone V part material area 5 Load the charge after the secondary roasting, the material area 7 of the external heat preservation zone VII part, and the material area 8 of the external heat preservation zone VIII are filled with the material after the primary roasting for secondary roasting. The installed furnace is energized for about 32-36 hours for s...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
PUM
Login to view more
Abstract
The invention relates to silicon carbide smelting, in particular to a process for smelting macrocrystalline green silicon carbide, which comprises the following: a, a step of preparing raw materials of quartz sand and petroleum coke in a ratio of 1.48 to 1.54; b, a step of material mixing; c, a step of furnace charge, in which homogenized raw materials are delivered to a material area (1) at the bottom of a furnace, a burden material subjected to secondary roasting is filled in reaction areas (3, 4 and 5) in the middle of the furnace, and a burden material subjected to primary roasting is filled in the external heat preservation areas (7 and 8); d, a step of smelting, in which the charged furnace is electrified for smelting for 32 to 36 hours, the power of a transmission transformer is 8,000 KVA, and after cooling for 72 hours, the materials are discharged and graded. By adopting a smelting process of roasting for two times, the process reduces the waste of primarily roasted material, the specific consumption of the petroleum coke, the quartz sand and power, and saves energy. Meanwhile, as a long-time lower power transmission is adopted, the reaction of grains is more uniform and complete and the structure of the grains is more compact and firm; and compared with products in the prior art, the product has higher hardness, larger grain size, higher content and more desirable powder grain form.
Description
technical field [0001] The invention relates to a silicon carbide smelting process, that is, a large crystal green silicon carbide smelting process. Background technique [0002] In the prior art, silicon carbide includes black silicon carbide and green silicon carbide, among which green silicon carbide is made of quartz sand and petroleum coke as the main raw materials, and is smelted by resistance furnace at high temperature. Green silicon carbide grains are the main raw material for cutting micropowder in the production line, and its grain size directly affects the hardness and content of the micropowder. The green silicon carbide grains are processed into fine powder by crushing, chemical treatment and other processes, which are mainly used in engineering ceramics, metallurgy, chemical industry, electronics, aerospace, refractory materials and other industries, especially for high-temperature semiconductor materials and single crystal silicon (electronic chips) ) and po...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more 
Login to view more