6results about How to "Reduce impurity concentration" patented technology

The movable dust removal device for workshop production comprises a moving mechanism, a recognition mechanism and a dust removal mechanism, the recognition mechanism is fixedly connected to the top of the moving mechanism, the dust removal mechanism is fixedly connected to the top of the recognition mechanism, and the moving mechanism comprises a transmission unit and a control unit. The control unit is fixedly connected to the top of the transmission unit, the dust removal mechanism comprises an air inlet unit and an exhaust unit, the air inlet unit is fixedly connected to the top of the recognition mechanism, and the exhaust unit is fixedly connected to the top of the recognition mechanism. According to the system, the programmable control module is arranged as a core, centralized control over roller driving, a steering motor, radar navigation and a suction system is achieved, the speed and direction of rollers are automatically adjusted, obstacle avoidance and path planning are achieved, and the effect of automatic cruise dust removal in a workshop is achieved; and a blind area possibly existing in a traditional single suction mode is avoided.

The utility model relates to the technical field of environment-friendly treatment of industrial sewage, in particular to a yellow phosphorus production sewage circulating purification system, which is provided with a yellow phosphorus sewage tank, a multi-stage sedimentation mechanism, a concentration filtering mechanism and a clear liquid collecting tank which are sequentially arranged along a sewage treatment flow, the yellow phosphorus sewage tank is used for collecting yellow phosphorus production sewage; the multi-stage sedimentation mechanism is provided with a plurality of deep cone sedimentation machines which are arranged in series and are used for carrying out sedimentation separation on the conveyed yellow phosphorus sewage; the concentrating and filtering mechanism is used for concentrating and separating the conveyed settling floating liquid; and the clear liquid collecting tank is used for collecting the clear liquid separated by the concentrating and filtering mechanism and conveying the clear liquid to the phosphorus collecting tower through a water conveying pipe. Aiming at the special characteristics of yellow phosphorus production sewage purification treatment, the utility model constructs a closed circulation purification system, has the technical characteristics of greatly reducing the occupied area, being low in construction and operation cost and excellent in separation and purification effect, and has remarkable technical effect and economic benefit.

The embodiment of the invention relates to the technical field of single crystal manufacturing, and provides an impurity removal method and a single crystal furnace, the impurity removal method comprises the following steps: detecting the real-time position of a seed crystal in the single crystal furnace, if the real-time position is a preset position, controlling the seed crystal to carry a first voltage and a crucible upper to carry a second voltage, and if the first voltage is greater than the second voltage, controlling the crucible upper to carry out impurity removal; enabling the silicon material, the crucible and the crucible upper to form a first electric field, and promoting the inner wall of the crucible to adsorb electropositive impurities in the silicon material in the crystal pulling stage of the single crystal furnace; when it is detected that the crystal pulling stage is ended and enters an ending stage, the seed crystal is controlled to carry third voltage and the crucible side is controlled to carry fourth voltage, the third voltage is smaller than the fourth voltage, the silicon material, the crucible and the crucible side form a second electric field, and impurities adsorbed to the inner wall of the crucible are promoted to be enriched at the tail of the pulled crystal; impurities enriched at the tails of the drawn crystals are removed. The embodiment of the invention is at least beneficial to purifying the silicon material and improving the quality of the drawn crystal.

[Problem] To provide a composition for use as a developer in photolithography, a fuel for combustion, or the like. [Solution] A composition including a liquid and a metal, wherein the liquid includes one or more substances selected from the group consisting of a fatty acid, a furan derivative, and a turpentine derivative, and the content of the metal is 10 ppb or less.

The invention belongs to the technical field of cobalt hydrometallurgy, and particularly relates to a method for preparing high-purity cobalt from crude cobalt hydroxide, which comprises the following steps of: performing size mixing on the crude cobalt hydroxide, and performing selective reduction leaching through concentrated sulfuric acid and sulfur dioxide to obtain cobalt leachate and manganese slag; sodium bicarbonate is adopted to adjust the pH of the cobalt leaching solution for segmented precipitation and filtration, and after impurities are removed, a nickel-containing cobalt sulfate solution is obtained; the solution is introduced into nickel removal resin subjected to qualified cobalt sulfate pre-saturation treatment for adsorption and elution separation, cobalt-containing effluent is combined, and high-purity cobalt sulfate is obtained; and finally, carrying out electrodeposition by taking the cobalt plate as an electrolyte solution to obtain the high-purity cobalt plate. According to the method, the processes of selective reduction leaching, sodium bicarbonate segmented precipitation, cobalt pre-saturation, resin adsorption nickel removal and cobalt electrodeposition are adopted, the method has the advantages of being short in technological process, easy to operate and low in cost, the prepared cobalt plate product is high in purity, and nickel sulfate is recycled.

The invention relates to the technical field of iron phosphate production, and discloses a battery-grade iron phosphate production method based on raffinate acid and a preparation method of lithium iron phosphate thereof, and the method comprises the following steps: 1) adjusting the pH value of the raffinate acid with ammonia water, adding a fluorination auxiliary agent, carrying out heat preservation stirring, and filtering to obtain a filtrate A; (2) taking the preheated and impurity-removed ferrous sulfate solution as filtrate B, adding a mixture of the filtrate A and hydrogen peroxide into the filtrate B, regulating the pH value of the system by using ammonia water, preserving heat for at least 30 minutes, and filtering to obtain a primary filter cake; 3) washing the primary filter cake until the conductivity of the washing water is less than 3.5 ms / cm, mixing phosphoric acid, pure water and the filter cake for size mixing, aging until the color of the size is changed, continuously keeping the temperature, filtering, washing the secondary filter cake until the conductivity of the washing water is less than 2.5 ms / cm, drying, calcining and crushing to obtain battery-grade iron phosphate; the raffinate acid is used for replacing monoammonium phosphate or diammonium phosphate, the preparation process is shortened, the production efficiency is improved, and the material meeting the requirements of battery-grade iron phosphate can be directly prepared.