46results about How to "Reduced silica content" patented technology

The invention discloses a comprehensive utilization method of a ferriferous fayalite material, relates to a processing method of the ferriferous fayalite material, and in particular relates to a method for separating and utilizing iron and silicon in fayalite. The method is characterized by comprising the following steps of: grinding the ferriferous fayalite material; mixing with alkaline liquor for leaching reaction; performing solid-liquid separation on obtained reaction slurry to obtain desilicated concentrate and silicon containing alkaline liquor; and oxidizing the desilicated concentrate in air to goethite. The method disclosed by the invention enriches, separates and extracts iron and silicon elements to form two products: goethite and silicon containing alkaline liquor through alkaline liquor leaching, wherein iron and silicon in ferriferous fayalite exist in solid and liquid states, so that the comprehensive utilization ratio of resources is high and the economic benefit is better.

The invention relates to a technique for purifying cryolite, and the technique comprises the following steps: (1) adding water and the cryolite into a reactor, wherein the mass ratio of the water to the cryolite is (0.5-6.0):1, and stirring, thus obtaining slurry; (2) adding HF-HCl-H2SO4 mixed acid into the slurry obtained in the step (1) while stirring, wherein the molar ratio of HF to HCl to H2SO4 is 1:(0.1-1):(0.1-1) in the mixed acid, and the mass ratio of the mixed acid to the raw material cryolite is (0.04-0.30):1; (3) heating the material obtained in the step (2) to 20-100 DEG C, and stirring for reaction for 10-150 minutes; and (4) carrying out vacuum filtration or centrifugal separation on a liquid-solid mixed material obtained in the reaction of the step (3), obtaining a solid material, and drying, thus obtaining the purified cryolite. The technique used for purifying the byproduct of cryolite is simple and low in energy consumption, and the recovery rate reaches more than 96%, so that the content of silicon dioxide in the cryolite and the ignition loss can be greatly reduced, and the treatment cost is low.

The invention discloses a gel electrolyte of a power lead-acid storage battery, which comprises the following raw materials in percentage by weight: 40-46 percent of H2SO4, 0.2-0.5 percent of SiO2, 0.1-0.5 percent of SnSO4, 0.8-1.2 percent of Na2SO4, 0.01-0.15 percent of PEG (Polyethylene Glycol), 0.01-0.5 percent of PAM (Polyacrylamide) and 47-57 percent of deionized water. The invention also discloses a method for preparing the gel electrolyte of a lead-acid storage battery. The invention has lower silicon dioxide content compared with the traditional electrolyte and no larger change on gelatinous performance and thixotropy, the ohmic resistance of the storage battery prepared by the invention is about 50 percent lower than that of the storage battery made of the traditional electrolyte, and the charging performance is improved by 15 percent or so.

The electrolyte of macromolecule nanometer polymer used in lead acid storage battery and its preparation method were related in this invention. It relates the area of lead acid storage battery. According the weight ratio, the electrolyte is mainly made up of the raw materials as following: ligand agent 0.1-1.5%, complexing agent 2.5-4%, catalytic agent 0.01-0.5%, stabilizing agent 2.3-3.8%, conditioning agent 0.1- 0.5%, antifoam agent 0.01-0.5%, sulfuric acid 36-45%, the others is water. It is characterized in that the content of silicon dioxide is low, the dosage is little and the cost is also low. And in that a steady colloid can be formed in the electrolyte which can elongate the gelatum time. Used in the minitype encapsulation lead acid storage battery, the capacity can increase greatly, the operational life can be elongated and the low temperature resistance can also be enhanced. The gel in the electrolyte can avoid the overflow of acid liquor. Otherwise, the electrolyte also has the merits of little inherent resistance, high capacity, longevity and good thixotropy and so on.

According to the present invention, there is provided a method for producing barium sulfate particles with a low alpha radiation dose, characterized in that the crushed ore obtained by crushing the barite raw material ore is subjected to elutriation treatment as steps (1), (a); or ( b) performing sieving treatment; or (c) performing elutriation treatment and sieving treatment; according to the silica content of the crushed ore, reducing the silica content to a predetermined value to obtain a first product, and then, as a step (2), reducing the first product obtained by the above treatment with a reducing agent, leaching the barium sulfide obtained as the second product in water to obtain a barium sulfide aqueous solution, and then, as step (3), treating the above-mentioned barium sulfide The aqueous solution is subjected to chemical synthesis to obtain barium sulfate particles with low alpha radiation dose.

The invention provides a premelting type desulfurizing agent suitable for high-aluminum silicon steel and a preparation method thereof. The desulfurizing agent comprises the following components by weight percent: 80-85 percent of calcium oxide (CaO), 13-18 percent of aluminum oxide (Al2O3), not greater than 1.5 percent of magnesium oxide (MgO), not greater than 1.5 percent of silicon dioxide (SiO2), not greater than 0.02 percent of all titanium (Ti) and not greater than 0.02 percent of all carbon (C). The preparation method comprises the following steps: (1) weighing 87-90 percent of limestone of which the granularity is not greater than 10mm and 10-13 percent of Al2O3 of which the granularity is not greater than 10mm by weight percent; (2) putting the raw materials in a mixer and evenly mixing; (3) adding a mixture to a smelting furnace, then, blowing fuel oil for heating, and smelting; and (4) discharging, cooling and crushing for later use. The desulfurizing agent provided by the invention is easy to store, has high desulfurizing rate and has low erosion on the refractory of a vacuum slot body; and in the desulfurizing process, molten steel carburetion and titanizing can be controlled to be under 5 parts per million (ppm), and the desulfurizing rate can reach at least 60 percent on the premise of not increasing the refining time.