42results about How to "Low technical transformation cost" patented technology

The invention relates to a near co-crystallizing type casting aluminum silicon alloy material with high heat conductivity and a production method thereof. The alloy comprises the main components including Al and Si, and is characterized by also comprising at least one of Sr, Ca and B. During casting production, the temperature of a melt is maintained within a range of 600-850 DEG C, and the alloy melt is cast into a casting mould so as to be cast into a casting; when the casting product is subjected to heat treatment, the temperature rising velocity of the heat treatment process is lower than 20 DEG C / min, and the temperature is maintained to be 100-450 DEG C and maintained for 0.5-10 hours, and then, the casting is cooled or air-cooled along with a furnace.

The invention discloses a high-strength cast aluminium-silicon alloy reinforced via cryogenic treatment, and a preparation method thereof, and belongs to the technical field of aluminium-silicon alloy. The invention also discloses chemical composition of the high-strength cast aluminium-silicon alloy reinforced via cryogenic treatment. The preparation method comprises steps of chemical composition controlling, melting process controlling, casting technology controlling, and cryogenic treatment. The step of cryogenic treatment comprises following steps: solution treatment is carried out for 5 to 6h at 470 to 490 DEG C, and then quenching in hot water of 60 to 90 DEG C is carried out; cryogenic thermal insulation is carried out for 24h at -145 to -165 DEG C, and the temperature of an obtained product is increased to room temperature in the air; aging treatment is carried out for 5 to 6h at 170 to 180 DEG C, and the processed product is cooled to room temperature in the air so as to obtain the high-strength cast aluminium-silicon alloy reinforced via cryogenic treatment. According to the preparation method, cryogenic treatment is capable of increasing solubility of alloy elements in cast aluminium-silicon alloy greatly, and more fine strengthening phases are formed by a plurality of added alloy elements, so that the mechanical properties of the high-strength cast aluminium-silicon alloy are much better than that of other cast aluminium-silicon alloy.

The invention discloses a preparation method of sulfur-containing ammonium phosphate. The preparation method comprises the steps that a diammonium phosphate device washing solution and elemental sulfur granules are together subjected to wet grinding, the size of the sulfur granules is controlled according to the production requirement, the sulfur granules are sieved and then conveyed to a reactor of an ammonium phosphate production device or conveyed to a storage tank to be mixed with wet process phosphoric acid and then conveyed to the reactor to react with liquid ammonia, and granulating and drying are performed to obtain sulfur-containing ammonium phosphate. According to the preparation method, the fertilizer containing more than two nutrient elements including phosphorus and sulfur is produced through the existing diammonium phosphate device washing solution, an original process route is not changed, and a low-cost product upgrading method is supplied to a traditional device. The obtained product contains uniform elemental sulfur, the returning frequency is significantly decreased, and the dust explosion possibility is reduced.

The invention discloses a processing technology of high-curling-degree shredded cut stems. According to the technology, tobacco stems are screened into thin tobacco stems and thick tobacco stems for pre-treatment of different intensities after stem preparation, the thin tobacco stems are sequentially subjected to stem washing and soaking, stem steaming, stem storage, stem sheet pressing, stem cutting and cut stem temporary storage, and the stem pressing and stem cutting process is used, so that the crushing problem caused by re-cutting of the thin tobacco stems is avoided, and the utilizationrate of tobacco stem raw materials is effectively increased. The thick tobacco stems are sequentially subjected to stem washing and soaking, stem steaming, stem storage, stem sheet cutting, stem cutting and cut stem temporary storage, the thick cutting and thin cutting process is used, low-water-content stem cutting is carried out before feeding by using a cutting machine, the difference between cut stem sheets and traditional pressed stem sheets is small, the stem cutting machine stably operates for a long time, and the actual cut stem shredded effect is good. After pre-treatment, cut stem mixing and cut stem processing are carried out. The size and shape of the cut stems prepared through the method are highly similar to those of cut tobacco.

The invention discloses an online automatic detecting and defoaming method for bonding spray glue. The method comprises the steps of: testing the bonding spray glue before use or detecting the bonding spray glue on line in the production process; detecting a glue spraying point by a detection head, and carrying out defoaming judgment on the glue amount of the glue spraying point on the basis of water volume estimation of the glue spraying point by adopting a water content detection system; if judging that foams in the bonding spray glue are not detected or the number of the foams is lower than a standard value, stopping defoaming; and if judging that the number of the foams in the bonding spray glue exceeds the standard value by the water content of the glue spraying point, carrying out online physical defoaming until not defoaming when judging that the foams in the bonding spray glue are not detected or the number of the foams is lower than the standard value by detecting the glue spraying point and judging the defoaming operation. The defoaming operation can be also visually and directly judged by observing glue water bubbles. The method has the advantages of simple and compact process, energy saving, safety, environmental protection, reliability for running, low technical improvement cost, simplicity and convenience for operation and maintenance, high defoaming efficiency, no influence on the quality of glue water, and capabilities of meeting the automatic online operation standard, supporting the high-quality bonding process and reducing the dependency on the early-stage quality of the bonding spray glue.

The invention provides a method for treating DDNP waste water through a technologically improved cement rotary kiln by adopting afterheat of the cement rotary kiln. Through cooperating with surrounding existing cement enterprises, an existing cement rotary kiln is improved by using a low cost, and the afterheat, with a high temperature of nearly 1000 degrees, of the technologically improved cement rotary kiln is utilized to conduct evaporating treatment on the waste water; and after the waste water is treated to a certain concentration, the treated waste water is subjected to burning treatment. According to the method for treating the DDNP waste water through the technologically improved cement rotary kiln by adopting the afterheat of the cement rotary kiln, the environmental pollution is reduced, the difficulty of technological improvement can further be reduced, and the cost for treating the DDNP waste water is reduced.

A steel strand cable with a polyurea protective material on the outer layer, comprising a steel strand assembly composed of n steel strands, and a polyurea protective coating I is coated on the outer layer of the n steel strand assembly A steel strand cable Ia with a polyurea protective material on the outer layer is formed, and a steel strand cable Ia0b composed of a polyurea protective coating II is coated on the outer layer of the wrapping tape of the steel strand cable Ia. The production method is to pass the steel strand assembly after pretreatment, drying, and forming steps through polyurea material coating process I, wrapping process, polyurea material coating process II, extrusion molding, and polyurea material coating process. One or more steps in the coating process III and other processes to make a series of steel strand cables with multiple protections. The production method of the invention is simple; the produced steel strand cable has good tensile strength, flexibility, high damping, aging resistance, wear resistance, and good vibration damping performance; it can greatly improve the anticorrosion ability of the steel strand cable and extend the The service life of twisted cable, 1≤n≤1000.

The invention relates to an automatic coal caving system on a top coal caving working face and a coal caving method thereof. The automatic coal caving system comprises a monitoring host, support controllers, inclination angle sensors, distance measuring instruments and data acquisition devices, wherein the distance measuring instruments and the data acquisition devices are mounted on end hydraulic supports in top coal caving supports, and the data acquisition devices are connected with a scraper conveyor of the top coal caving working face; the support controllers are in the same number with the top coal caving supports, and each top coal caving support is provided with the support controller; the inclination angle sensors are in the same number with the top coal caving supports, and the inclination sensor is arranged on a tail beam of each top coal caving support; the monitoring host is mounted in an underground road and in wireless connection with all the support controllers; each distance measuring distance and the corresponding data acquisition device are electrically connected with the support controller on the same top coal caving support; and each inclination angle sensor is electrically connected with the support controller on the same top coal caving support through a connector.