Process for preparing barium oxide crystal by electric resistivity method
A barium oxide, resistance method technology, applied in the direction of calcium/strontium/barium oxide/hydroxide, etc., can solve the problems of unfavorable operator's health and environmental protection, high arc noise, arc instability and other problems, and achieve the production site environment. Good, save energy, reduce the cost of raw materials
Inactive Publication Date: 2006-10-04
刘仁福 +1
View PDF1 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] 1. The noise generated by the arc during the production process is relatively large;
[0004] 2. In the process of producing crystalline barium oxide by the arc method, the carbon rod electrode is used vertically. It relies on the heat generated by the arc to complete the temperature required in the production. Because the arc is unstable and the heat is too concentrated, it will cause the reaction. The carbon monoxide is concentrated and discharged in a large amount, and there is about 20 cm of mixed material waiting to react on the arc. Some of them are brought into the air of the work site by a large amount of discharged gas. The dust pollution is serious, which is not conducive to the operators. health and environmental protection, and cause waste of raw materials
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0015] Take 25.7Kg of first-grade barium carbonate and 2.3Kg of graphitized electrode powder that meet the above technical requirements. After mixing them evenly, first put 6Kg of them into the resistance furnace, turn on the power, and adjust the current and voltage in time. The current is 800- 1800A, voltage 16-36V. When the temperature in the furnace reaches 1200°C, barium carbonate and carbon start to undergo redox reaction:
[0016]
[0017] The carbon monoxide gas protects the carbon rods in the furnace, which enables the carbon rods to work continuously at high temperature without being easily oxidized. Continue to raise the temperature. When the temperature of the reaction zone in the furnace reaches 1920°C, start to add the remaining materials in batches from the feeding port of the resistance furnace, and control the temperature of the reaction zone at 1920°C-1930°C until the feeding reaches the metering standard. Cut off the power supply, seal the feeding po...
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 disclosed preparation method for crystal BaO with resistance method comprises: mixing BaCO3 and C to put in resistance furnace with carbon rod as heater and graphite plate as furnace body; once up to 1200Deg, reacting to produce BaO and CO; up to 1920Deg, adding in batch the mixture while controlling temperature in 1920-1930Deg till the material up to measuring standard; cutting off power, sealing feeding port to cool naturally till 50Deg and open furnace to take out product. This invention improves product field with small noise and dusty, and improves product quality (concentration as 96% and density as 5.72g / cm3).
Description
technical field [0001] The invention relates to a method for producing crystalline barium oxide by using a resistance furnace in an industrial electric furnace. Background technique [0002] Crystalline barium oxide is the main raw material of metal barium getter in the electronics industry. Chinese patent literature disclosed a method for producing crystalline barium oxide by arc method on February 14, 1996. The announcement number is: CN1030982C, but the method has the following deficiencies : [0003] 1. The noise generated by the arc during the production process is relatively large; [0004] 2. In the process of producing crystalline barium oxide by the arc method, the carbon rod electrode is used vertically. It relies on the heat generated by the arc to complete the temperature required in the production. Because the arc is unstable and the heat is too concentrated, it will cause the reaction. The carbon monoxide is concentrated and discharged in a large amount, and ...
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
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/06
Inventor 刘仁福吴林东
Owner 刘仁福