31results about How to "Fast desulfurization reaction" patented technology

The invention discloses a method for reducing the content of sulfate radicals in dihydric dilute phosphoric acid, which is characterized in that a desulfurizer is added to wet-process phosphoric acid extraction slurry, mixed and stirred, and mixed and reacted at 60-80°C for 5-30 minutes. Then the mixed slurry is sent to the filter of the phosphoric acid extraction device for filtration, and the diluted phosphoric acid with a sulfate mass percentage content of less than 1.2% is obtained by filtration; The mass ratio of sulfate radicals in the medium is 0.35-0.50:1. The present invention solves the problem of high sulfate content in the dilute phosphoric acid of the dihydrate method, and is beneficial to the use of the dihydrate method phosphoric acid in the production of high-nutrient ammonium phosphate fertilizer, feed grade phosphate, industrial grade ammonium phosphate and phosphoric acid purification products. Simple, short desulfurization reaction time, good desulfurization effect and low desulfurization cost.

The invention discloses a molten iron pure spray particle magnesium desulfurization spray gun with a vaporizing chamber in a spearhead. The molten iron pure spray particle magnesium desulfurization spray gun comprises a connecting flange, a gun-barrel and a spearhead blowing vaporizing chamber, which are sequentially connected and communicated with each other, wherein the spearhead blowing vaporizing chamber is sequentially composed of a vaporizing chamber bell jar, an anchoring part group and a refractory castable lining from inside to outside; a bottom skirt is arranged at the lower end of the vaporizing chamber bell jar; and a plurality of air outlets are evenly formed in the bottom skirt in an emission shape. The method comprises the following steps: selecting a metal material to process and fabricate each component of the spray gun and removing rust for later use according to structural parameters of the spray gun; sequentially preparing a gun core and the vaporizing chamber bell jar; connecting the gun core and the vaporizing chamber bell jar by welding; and welding a reinforcing rib plate in a gap among the lower end of the gun core, the top of the vaporizing chamber bell jar and the refractory castable lining; and finally welding the anchoring part group, and pouring to obtain the spray gun. Compared with a conventional vaporizing chamber spray gun, the molten iron pure spray particle magnesium desulfurization spray gun disclosed by the invention has the advantages of being simple in structure, stable to blow, low in cost, efficient in desulfurization, long in service life and the like.

The invention discloses a long-life stirrer for full-area impact mixing of molten iron, comprising a stirrer connecting flange, a stirring shaft and a stirring blade; the stirring blade is a single-layer special-shaped structure stirring blade, and the top surface and the bottom surface of each stirring blade are planes and outer surfaces It is a circular arc surface, the upper anti-iron surface and the upper back iron surface are positive helical surfaces, the lower anti-iron surface and the lower back iron surface are reverse helical surfaces; the forward helical surface of the upper anti-iron surface and the lower anti-iron surface The junction of the reverse helical surface is an arc-shaped transition surface, and the junction of the forward helicoid of the upper back iron surface and the reverse helicoid of the lower back iron surface is an arc-shaped transition surface. Through the structural design of special-shaped stirring blades and the optimization of structural parameters, the erosion wear area and erosion process of the molten iron in the agitator are significantly reduced, the service life of the agitator is greatly extended, the size of the upper and lower circulation flow areas of the agitation is enlarged, and the velocity of the upper and lower circulation flow is increased. And kinetic energy, to ensure the reliability and stability of the radial discharge jet impingement flow field of the stirring up and down circulation flow.

The invention discloses a molten iron self-excited oscillating pulse stirring desulfurization stirrer, which comprises a stirring shaft, a stirrer connecting flange and stirring blades arranged at the top of the stirring shaft, and the stirring shaft includes a stirring shaft core and a refractory castable lining for the stirring shaft core; The stirring blades include large stirring blades and small stirring blades in an equal number, all of the large stirring blades are alternately welded to the outer peripheral surface of the stirring shaft around the circumference of the stirring shaft with all the small stirring blades, so Both the bottom surface of the large stirring blade and the bottom surface of the small stirring blade are flush with the bottom surface of the stirring shaft. The structural design of large and small stirring blades and the optimization of structural parameters can achieve comprehensive effects such as increasing the desulfurization reaction speed, improving desulfurization efficiency, shortening the stirring time, and prolonging the service life of the agitator. Finally, it can improve the dynamic conditions and desulfurization technology and economy of molten iron KR stirring desulfurization. The intended purpose of the indicator.

The invention discloses a desulfurizer for steelmaking based on calcium oxide and a preparation method thereof. The desulfurizer is prepared from the following raw materials in parts by weight: 30-35 parts of calcium oxide, 15-20 parts of aluminum ash, and 14 parts of iron slag ‑18 parts, 8‑9 parts of calcium difluoride, 6‑8 parts of barium carbonate, 5‑7 parts of attapulgite, 4‑6 parts of boric anhydride, 3‑7 parts of flame retardant silicone grease; the desulfurizer of the present invention It is prepared based on calcium oxide, and aluminum ash and iron slag are added at the same time, which realizes resource reuse and reduces production costs. The desulfurizer has improved purity, stable performance, and good desulfurization effect. Larger contact surface with sodium hydroxide powder, while the stirring tube rotates, it can heat the mixing material 2 and sodium hydroxide powder evenly, so as to speed up the removal of impurities in the iron slag, ensure the purity of the desulfurizer, and improve production efficiency.

The invention discloses a converter furnace steel-making desulfurizing agent and a preparation method thereof. The converter furnace steel-making desulfurizing agent is mainly obtained by evenly mixing the following composition raw materials in parts by weight: calcium oxide, calcium fluoride, barium carbonate, silica, carborundum, attapulgite, boron anhydrous and flame retardant silicone grease.The preparation method is used for the converter furnace steel-making desulfurizing agent which is the desulfurizing agent free from aluminum and can be used for improving the physical, mechanical and technical performances of steel. According to the converter furnace steel-making desulfurizing agent, gas is removed, nonmetal inclusions are changed, and the quality and mechanical performance of furnace steel making can be improved.

The invention is desulfurizing sorbent which is made up by immersing at least two kinds of transition metal and alkali metals compound and polyacrylic ester on coal active char (the weight are 3-30%, 1-40%, 0.2-10% of char weight respectively). The manufacturing method is: the water-soluble transition metal, kalium compound and polyacrylic ester are marinated on the char carrier respectively or jointly, and they are dried and actived in air at 80-160 deg.C. The reaction speed of the sorbent is fast, it can purifies H2S, SO2 to ppb grade, the rate can reach 50000 h-1. It has no chromium, no dust on the surface and it is smooth. It can be used in semiconductor industry, special life supporting system closed room, and medical and health, cultural relic protection and environment protection fields.

The non-oriented silicon steel desulfurizer consists of CaO 45-58 wt%, Al2O3 8-23 wt%, CaF2 15-30 wt%, SiO2 3-8 wt%, Mg 2-6 wt%, C not more than 0.015 wt%. Before it is applied in desulfurizing moltensteel, the silicon steel desulfurizer is surface deactivated via adding organic solvent in 0.3-1.0 wt%. The desulfurizer containing metal Mg has excellent deoxidation function and excellent molten steel desulfurizing effect. The desulfurizer with one hydrophobic protecting layer formed through the deactivation treatment has high damp-proofing effect and high desulfurizing reaction performance.

The invention discloses a desulfurization system of a circulating fluidized bed boiler. The desulfurization system comprises a cyclone separator (12), wherein the upper part of the cyclone separator (12) is connected with the upper part of a hearth (11) of the boiler; the lower part of the cyclone separator (12) is connected with the lower part of the hearth (11) through a material returning pipe (13); the material returning pipe (13) is provided with a desulfurization agent inlet (10); and the desulfurization agent inlet (10) is formed in a negative-pressure position of the material returning pipe (13). The desulfurization agent in the desulfurization system can be easily sprayed into the boiler, the desulfurization efficiency is high and the energy consumption is low.