9results about How to "Reduce oxidation loss" patented technology

The invention relates to the technical field of preparation of silicon carbide ceramics, in particular to an in-situ reaction sintered silicon carbide ceramic and a preparation method thereof.The preparation method comprises the following technological stages which are conducted in sequence: S1, preparation of silicon carbide slurry, specifically, organic matter precursor raw materials are weighed according to the mass content percentage to form the silicon carbide slurry; s2, vacuum grouting: injecting the silicon carbide slurry in the vacuum grouting tank into the shaping mold from the bottom of the shaping mold to form a silicon carbide green body; and S3, in-situ reaction sintering is conducted, specifically, the silicon carbide green body is placed in a sintering furnace, heating, heat preservation and cooling are conducted on the silicon carbide green body in the argon atmosphere through a segmented temperature control technology, and the silicon carbide ceramic is obtained. The silicon carbide ceramic prepared by the method disclosed by the invention has relatively high density and excellent mechanical properties.

The present application relates to the technical field of feed additives, and specifically discloses a process for spray-dried blood meal. A process for spray-dried blood meal comprises the following steps: (1) pretreatment: filtering fresh blood to remove residues for standby use; (2) adjusting pH: using sodium citrate buffer solution to adjust the pH value to 6.8-7.2; (3) spray drying: using a high-precision centrifugal pump to transport the adjusted blood into a spray tower for spray drying; (4) permeate treatment: dispersing the powder formed by spray drying in the permeate, treating at 25-30°C for 3-3.5h, centrifuging, drying at 30-35°C, and reducing the moisture content to 40-60%, and then performing variable temperature pressure difference puffing treatment; (5) coating: coating the powder formed by spray drying through a fluidized bed, and packaging and storage; In addition, the preparation method of the present application has the advantages of increasing the nutrient content and digestibility of the product blood meal.

This utility model discloses a rare earth wire feeding device, including a housing, a wire feeding assembly, a protective roller, a support roller, and a graphite shaft. The support roller is horizontally and longitudinally positioned on the left side of the middle of the housing, and a graphite shaft is horizontally positioned on the left end face of the support roller. The left end of the graphite shaft extends vertically out of the housing and then extends downwards at an angle to the left. A protective roller is vertically positioned on the upper end face of the support roller, and its upper end is connected to the top surface of the housing. A through hole I is vertically penetrating the upper surface of the housing relative to the position of the protective roller, and a wire feeding assembly is positioned on the upper surface of the housing relative to the through hole I. A channel I is coaxially penetrating the upper end face of the protective roller relative to the position of the through hole I. The lower end of channel I enters from the joint between the protective roller and the support roller, then exits in an arc shape from the joint between the support roller and the graphite shaft, and extends along the length of the graphite shaft out of its left end face, thereby performing the wire feeding operation. This utility model reduces the oxidation loss rate.

The invention provides a method for opening a new furnace by using high-silicon molten iron in a 120-ton dry dedusting converter, belongs to the technical field of steel smelting, and solves the problem that the difficulty of opening the new furnace by using the high-silicon molten iron in the existing dry dedusting converter is large. The method comprises the following steps: converter loading: loading molten iron and scrap steel into a 120-ton top-bottom combined blown converter; oxygen supply by the converter: igniting and supplying oxygen after the converter is loaded; the auxiliary materials are added for the first time after ignition, the auxiliary materials are added for the second time, the active lime is added in batches, and then the limestone and the active lime are added in batches; and converter end point control. According to the method, the converter quantity, the scrap steel quantity and the molten iron quantity are reasonably controlled, the complexity and uncertainty in the production process can be reduced, the stable molten pool depth of the converter in the smelting process can be ensured by accurately controlling the charging quantity, and therefore the production efficiency and the product quality are improved, the production cost is reduced, energy consumption is optimized, and the economic benefit is increased. Unnecessary energy consumption and waste generation are reduced, and environmental protection and sustainable development are facilitated.

The invention relates to the field of food, and particularly discloses gum-based candies capable of improving the stability of B vitamins and a making method of the gum-based candies. The invention discloses gum-based candies capable of improving the stability of B vitamins. 100 parts of gum-based candies comprise the following raw materials in parts by weight: 17.5-23.5 parts of gum-based materials, 1-4 parts of a taste masking agent, 0.023-0.028 part of B vitamin capsules, 0.1-1 part of food coloring, 1-4 parts of edible acid and the balance of a filling agent, the B-group vitamin capsule is prepared from a core material and a wall material according to the mass ratio of 1: (2.3-2.5), the core material comprises B-group vitamin, and the wall material comprises konjac glucomannan, bacterial cellulose nanofiber and glycerol according to the mass ratio of 1: (0.02-0.04): (0.2-0.3). The gum-based candy is rich in B vitamins, and the B vitamins are good in stability, long in chewing time and good in viscoelasticity.

The application relates to the field of cupronickel materials, and particularly discloses a new type of cupronickel suitable for a MIM process and a forming process thereof. Metal powder raw materials include the following mass percentages: Ni 12-18%, Sn 0.6-1.0%, mixed lanthanum-cerium-praseodymium rare earth 0.6-1.0%, Cu 80.4-86.4%, and the balance of Fe and inevitable impurities. When the material is used as a whole, the oxidation resistance of the new material in a catalytic degreasing process can be significantly improved, and the material loss in a sintering process is also greatly reduced, so that the inherent shortcomings of traditional cupronickel are overcome, and various cupronickel products with complex shapes can be perfectly produced through the MIM technology.

The invention relates to the technical field of steel rail shears, and discloses a multi-component alloy material for a movable steel rail shear tool and a preparation method, the multi-component alloy material comprises the following raw materials: 0.85-1.05% of C, 4.5-6.0% of Cr, 1.8-2.5% of Mo, 1.2-1.8% of W or V, 0.8-2.3% of Co or 0.4-0.8% of Co, 1.0-1.5% of Ni, 0.3-0.6% of Si, 0.4-0.8% of Mn, less than or equal to 0.02% of P, less than or equal to 0.015% of S, and the balance of Fe and inevitable impurities; according to the steel rail shear tool, through the synergistic effect of elements such as C, Cr, Mo, W, Co, V, Ni, Si and Mn, stable carbide is formed, a microstructure is optimized, the HRC of the steel rail shear reaches 58-62, the impact toughness is larger than or equal to 18 J, the impact toughness of the steel rail shear at the temperature of-40 DEG C is still larger than 15 J, and it is guaranteed that the steel rail shear can still be used in the high and cold environment (-40 DEG C); the steel rail shear is subjected to 1000 times of continuous shearing fatigue tests, the tipping rate is reduced to 0.5% or below, and the use reliability is high.

This invention relates to the field of plant extract preparation technology, and particularly to a low-oxalic acid, high-activity fresh purslane extract, its preparation method, and its applications. This invention uses freshly harvested purslane as raw material. Except for washing, the entire process of pulverization, enzymatic hydrolysis, filtration, and concentration does not require additional process water, directly producing a raw homogenate. After acidification, enzymatic hydrolysis with compound enzymes, enzyme inactivation, filtration, pressing, and oxalic acid removal, the extract is obtained through low-temperature vacuum oxygen-free concentration. This invention requires no organic solvents and can efficiently retain the total flavonoids, total polysaccharides, and phenolic acid active ingredients. The resulting extract contains ≥1.0% total flavonoids, ≥5.0% total polysaccharides, ≥30% solids, and ≤0.05% oxalic acid. This invention solves the problems of activity loss, dilution with added water, oxalic acid irritation, large oxidation losses, and unstable industrialization associated with traditional processes. The process is gentle and can be automated for mass production, making it suitable for cosmetics, personal care products, food, and functional foods.

The invention relates to the technical field of metallurgical industry, and discloses a converter oxygen consumption prediction method and device, electronic equipment and a storage medium, the method comprises the steps that target feature data and predicted feeding data of a target converter are obtained, the target feature data are determined according to preset influence factors, and the predicted feeding data are determined according to the preset influence factors; the predicted feeding data is obtained through prediction according to a preset feeding prediction model, oxygen consumption prediction is conducted on the target characteristic data and the predicted feeding data through a preset oxygen consumption prediction model, target oxygen consumption is obtained, and oxygen supply of the target converter is controlled according to the target oxygen consumption, the oxygen consumption prediction model is obtained by training a training data sample with an oxygen consumption label; by means of the method, the accuracy, stability and process change adaptability of converter oxygen consumption prediction are improved.