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38results about How to "Less oxygen" patented technology

Method for semi-continuously preparing TiAl base alloy automobile air valve and components with similar shape

The present invention relates to preparative technique for automobile air valve and parts of similar shape, specifically speaking, the present invention is a semi-continuous method for preparing TiA1-based alloy automobile air valve and parts of similar shape. The present invention adopts the method of vacuum pouring after semi-continuous induction melting in a vacuum pouring furnace: take the spongy titanium, industrial pure aluminum and other alloy elements as the raw materials and adopt a CaO formed ceramic pot for vacuum induction melting; the cast shell mold consists of part mold shell such as air valve, etc., intermediate flow trays and a vacuum pouring pipe; the intermediate flow trays are evenly distributed in the lengthwise direction of the air valve part; the technique parameters of the vacuum pouring are that the shell mold temperature is between 50 to 800 Celsius degrees and the vacuum pouring pressure difference is2.0 multiplied by 104-7.0 multiplied by 104Pa. The present invention can semi-continuously produce parts which have complicated shapes and are hard to be formed with high-melting point, high-activity Ti A1-based materials and the cost is low; in addition, the produced automobile air valve boasts of excellent internal quality and stable casting performance.
Owner:INST OF METAL RESEARCH - CHINESE ACAD OF SCI

Treatment device and method for high ammonia-nitrogen wastewater

The invention provides a treatment device and method for high ammonia-nitrogen wastewater. The treatment device comprises an adjustment pool, chemical feeding units, a tank, a first container, a second container, a first separating piece, a second separating piece and an aeration module, wherein the chemical feeding units are used for adjusting the PH value of the wastewater; an opening is formed in the upper portion of the tank; the first container is arranged in the tank and located in the second container, an opening is formed in the bottom of the first container, and a separating net is arranged in the opening; padding is arranged in the first container; wastewater output by the adjustment pool is sent into the first container; the second container is arranged in the tank, an opening is formed in the bottom of the second container, and a separating net is arranged in the opening; padding is arranged in the second container; wastewater output by the adjustment pool is sent into the second container; the first separating piece and the second separating piece are arranged in the portion, outside the second container, of the tank from top to bottom; the upper portion of the first separating piece is inclined, and the horizontal distance between the first separating piece and the inner wall of the tank is decreased from top to bottom; the top end of the second separating piece is lower than the first separating piece; the second separating piece is provided with an opening; and the aeration module is arranged under the second container. The treatment device and method for the high ammonia-nitrogen wastewater have the advantages of efficient operation, good application prospects and the like.
Owner:FOCUSED PHOTONICS

Method for semi-continuously preparing TiAl base alloy automobile air valve and components with similar shape

The present invention relates to preparative technique for automobile air valve and parts of similar shape, specifically speaking, the present invention is a semi-continuous method for preparing TiA1-based alloy automobile air valve and parts of similar shape. The present invention adopts the method of vacuum pouring after semi-continuous induction melting in a vacuum pouring furnace: take the spongy titanium, industrial pure aluminum and other alloy elements as the raw materials and adopt a CaO formed ceramic pot for vacuum induction melting; the cast shell mold consists of part mold shell such as air valve, etc., intermediate flow trays and a vacuum pouring pipe; the intermediate flow trays are evenly distributed in the lengthwise direction of the air valve part; the technique parameters of the vacuum pouring are that the shell mold temperature is between 50 to 800 Celsius degrees and the vacuum pouring pressure difference is2.0 multiplied by 104-7.0 multiplied by 104Pa. The present invention can semi-continuously produce parts which have complicated shapes and are hard to be formed with high-melting point, high-activity Ti A1-based materials and the cost is low; in addition, the produced automobile air valve boasts of excellent internal quality and stable casting performance.
Owner:INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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