35results about How to "Alleviate supply tension" patented technology

The invention relates to a preparation method of an inorganic composite white pigment with high covering power. The method comprises the steps of: taking titanium white powder and white mineral powder or composite white mineral powder as raw materials; taking a wet ultrafine stirring grinder or a sand miller as a compound device; performing segmented wet ultrafine grinding and compounding to the titanium white powder and the white mineral powder by adding a certain quantity of pH adjusting agent and dispersing agent; and drying and mechanically dispersing and depolymerizing size after ultrafine grinding and compounding to prepare the inorganic composite white pigment which can be used by replacing the titanium white powder, wherein the performance indexes such as the granularity, the whiteness and the covering power, and the like, of the inorganic composite white pigment are as the same as or similar with the granularity, the whiteness and the covering power of the titanium white powder. The method has simple preparation technology, lower preparation cost and cleaning preparation process.

The invention relates to a secondary cast-on process for continuous-casting tundishes and belongs to the technical field of continuous casting of the metallurgical industry. According to the technical scheme, the process comprises the steps that (1), before casting of the tundishes is stopped, slagging treatment is conducted on the tundishes; (2), when the liquid steel level of the tundishes remains at 200 mm, the remaining one to two middle streams of water gaps are cast continuously; (3), when the tundish liquid steel level is at 10-20 mm, casting of the tundishes is stopped; (4), the tundishes are baked, the baking temperature ranges from 1,100 DEG C to 1,300 DEG C, and the baking time ranges from 45 minutes to 180 minutes; (5), after baking of the tundishes is completed, liquid steel in steel ladles is injected into the tundishes; and (6), the liquid steel level of the tundishes is greater than 300 mm, and secondary casting is conducted on the tundishes. The secondary cast-on process has the beneficial effects that the temperature loss of the tundishes is reduced, the service life of the tundishes is guaranteed, the consumption of continuous-casting refractory is lowered, and the smooth production of iron and steel enterprises is guaranteed.

The invention discloses a backfill material prepared from engineering waste slurry and a preparation method thereof, and each cubic meter of the backfill material comprises 350-700 parts by mass of engineering slurry, 30-400 parts by mass of water, 90-150 parts by mass of cement, 172-250 parts by mass of fly ash, 400-500 parts by mass of coarse sand, 200-300 parts by mass of fine stone, 30-96 parts by mass of bentonite, 6.0-6.5 parts by mass of a water reducing agent and 11.5-12 parts by mass of an accelerator. The water content of the engineering slurry is less than 320%. The problems that the engineering waste mud is difficult to treat, and natural backfill materials used for engineering construction backfill are increasingly scarce are solved.

The invention relates to a preparation method of an inorganic composite white pigment with high hiding power. This method uses titanium dioxide and white ore powder or compound white ore powder as raw materials, and uses wet ultra-fine stirring mill or sand mill as composite equipment, by adding a certain amount of pH regulator and dispersant to the titanium dioxide and white ore. The powder is subjected to segmental wet ultrafine grinding and compounding, and then the slurry product after ultrafine grinding and compounding is dried and mechanically dispersed and depolymerized to prepare performance indicators such as particle size, whiteness, hiding power and the particle size and whiteness of titanium dioxide. It is the same or similar to the hiding power index, and can replace the inorganic composite white pigment used in titanium dioxide. The method has simple preparation process, low production cost and clean production process.

The present invention relates to method of producing biological diesel oil with leftover of edible oil processing, and belongs to the field of oil and grease chemical technology. The method of producing biological diesel oil with leftover of edible oil processing, includes the steps of pre-treatment of the oil leftover, ester exchange reaction with methanol, recovering solvent, laminating to separate glycerin phase, water washing of oil layer, and dewatering to obtain biological diesel oil. The method features the ester exchange reaction in the codissolved system form with the pre-treated oil leftover, methanol and tetrahydrofuran with sulfuric acid as catalyst; and the edible oil leftover produced in the vegetable oil refining process. The biological diesel oil has low viscosity and burning performance similar to that of 2# diesel oil.

The invention relates to a method for preparing coal gas by moulded coal, belonging to the coal gas industrial field. The technical problem solved by the invention is to provide a method for preparing coal gas by moulded coal under normal pressure. Moreover, the coal gas prepared by the method has higher heat value. The method is characterized in that: the thicknesses of material layers when moulded coal is gasified include: 300 to 500mm of an ash layer, 250 to 300mm of a gasification layer and 500 to 800mm of a fuel preparation layer; a gasification agent is obtained through mixing water vapor with air with oxygen volume content of 26 to 28 percent; and the saturation temperature of the gasification agent is between 65 and 67 DEG C. The heat value of the coal gas prepared by the method is between 6,300 and 6,700Kj / Nm<3> which is much higher than the heat value (approximately 5,200 to 5,500Kj / Nm<3>) of coal gas prepared by the prior method for preparing coal gas by moulded coal; therefore, the method has a wide application prospect.

The invention provides a hydroconversion method of deep cut anthracene oil. The method comprises the following steps of: fractionating deep cut anthracene oil into a light fraction and a heavy fraction, then separating the light fraction after hydrofining, refining the liquid phase which is obtained during the separating process to generate an oil, infusing the oil and the heavy fraction into the hydroconversion region and then separating the heavy fraction from the oil which is generated during the hydroconversion process, wherein the first fraction which is light is entered into the hydrocracking region, and the cracked product which is obtained during the hydrocracking process is infused into the fractionation system to obtain gasoline and diesel fractions. The hydroconversion method of deep cut anthracene oil provided by the invention has the advantages that the deep cut anthracene oil is inversed into light fuel oil by means of hydroconversion, an application way with high additional value is provided to coal tar, the operation of the device is stable by optimizing the process, and the running period of the device is long.

The invention belongs to the field of metal smelting, and particularly relates to ceric rare earth ferrosilicon alloy and a production method thereof. The technical problems that existing rare earth ferrosilicon alloy is high in production cost, severe in alloy pulverization and low in rare earth yield. According to the technical scheme, the ceric rare earth ferrosilicon alloy comprises, by mass, 29% to 31% of RE, 49% to 51% of Si, smaller than or equal to 0.1% of Ca and smaller than or equal to 0.5% of Al, wherein the content of Ce / RE is larger than or equal to 85%. The invention further provides the production method of the ceric rare earth ferrosilicon alloy. Rare earth elements are used in a balanced mode through the ceric rare earth ferrosilicon alloy produced through the carbothermy method, the utilization rate of rare earth resources in short supply is effectively increased, the circular economy is energetically developed, and the improvement of the rare earth ferrosilicon production technology is promoted.

The invention relates to a novel valve side wire-outlet structure for a converter transformer, and belongs to the technical field of an extra-high voltage converter transformer. According to the technical scheme, multiple layers of insulating paper sleeves and corrugated boards are arranged on the exterior of an aluminum pipe in the wire outlet; the insulating paper sleeves in each layer are arranged from inner to outer in a stepped and overlapped manner; the lengths of the insulating paper sleeves in the inner layer are greater than that of the insulating paper sleeves in the outer layer; the corrugated boards are arranged between adjacent two layers of the insulating paper sleeves; the lengths of the corrugated boards are greater than that of the insulating paper sleeves in the upper layer and less than that of the insulating paper sleeves in the lower layer; flat paper boards (2) are arranged in the junctions of the insulating paper sleeves; the insulating paper sleeves and the corrugated boards on the exterior of the aluminum pipe are gradually thinned to be converted into a crepe paper (1) structure in a transitional manner; the exterior of the aluminum pipe far from the wire outlet is wrapped with the crepe paper (1); the crepe paper wraps for insulation until the flat paper boards (2) are wrapped, and then the crepe paper continuously wraps for insulation until the insulating paper sleeves in the outermost layer are wrapped. The novel valve side wire-outlet structure has the positive effects that the novel valve side wire-outlet structure is reasonable in structure, easy to implement, and capable of effectively relieving tension supply of valve side leads and capable of promoting the rapid development of the direct current power transmission and transformation industries.

The invention discloses an early-maturing-promoting efficient cultivating method for a sweet potato protected area in the southern Shandong province. An early-maturing, high-yield and high-quality sweet potato new variety Longshu 9 is selected, a three-film covering planting mode and a fresh potato and potato seedling sale production mode are adopted, organic fertilizer is additionally applied inthe production process, the technical means of timely early planting, reasonable close planting, heat preserving and heating, seedling harvesting and scientific management is carried out, and the problems that in the sweet potato early-maturing-promoting cultivating technology, the ground temperature is low, heating is difficult, the survival rate of potato seedlings is low, development is slow, and the sweet potato planting benefits are slightly increased are solved. Compared with a traditional planting method, by means of the method, the sweet potato planting time can be advanced before andafter 25th February, seedlings are harvested starting from the last ten days of April, the seedlings are harvested 3-5 times in the whole sweet potato growth period, about 60,000 potato seedlings areharvested in the area of 666.7 m<2>, fresh potatoes are harvested starting from the first ten days of June, and it is promoted that the fresh potatoes come into the market in advance.

The invention provides a nano rare earth additive for dimethyl ether gas and methanol fuel. In the nano rare earth additive, the compounds or salts of lanthanum, cerium and manganese account for 60% of mass components, the compound or salt of each of lanthanum, cerium and manganese accounts for 10-25%, and the rest components are any three-five compounds or salts of arrowhead, lutetium, erbium, scandium, praseodymium, neodymium and yttrium. The invention also provides a preparation method and application of the nano rare earth additive. Ten nanoscale lanthanide series rare-earth elements are combined to oxygen-containing fuels such as the dimethyl ether gas and the methanol fuel in a reasonable proportion, thus the heat value utilization of the fuel is obviously improved and is superior to that of liquefied petroleum gas, thereby overcoming the defect that the heat value utilization of the oxygen-containing fuels such as the dimethyl ether gas and the methanol fuel is low. The nano rare earth additive can completely replace traditional fuels such as the liquefied petroleum gas, diesel and the like.