8 results about "Pidgeon process" patented technology

The invention relates to the field of preparation of high-purity magnesium, in particular to an integrated system and method for continuous purification and condensation of magnesium steam based on a Pidgeon process. Comprising a reduction unit, a condensation unit and a vacuum unit, a gas collection tank is arranged between the reduction unit and the condensation unit, a trap is arranged in the gas collection tank, and the trap comprises a trapping plate; the integration method comprises the following steps: step 1, preparing at least two reduction tanks, and keeping at least one reduction tank to generate high-temperature magnesium steam; 2, the temperature of the high-temperature magnesium steam is kept at 800-1000 DEG C, the vacuum degree is kept at 10-100 Pa, solids in the high-temperature magnesium steam are removed, and stable magnesium steam is obtained; and 3, condensing the stable magnesium steam to obtain refined magnesium. According to the integrated system and method for continuous purification and condensation of the magnesium steam based on the Pidgeon process, the problems that continuous production cannot be achieved through an existing Pidgeon process, and the purity of obtained magnesium is low are solved.

The invention provides a vertical tank bottom magnesium discharging method for a Pidgeon process reduction procedure, which comprises the following steps: a bottom magnesium discharging pipeline is arranged at the bottom of a vertical reduction tank, one end of the bottom magnesium discharging pipeline is communicated with the inside of the tank, and the other end of the bottom magnesium discharging pipeline is communicated with an external cooling device; an automatic feeding device is arranged at the top of the vertical reduction tank and is used for filling furnace charge into the reduction tank from top to bottom; a plurality of material level detection devices are arranged in the vertical reduction tank and used for sensing the stacking state of furnace charge in the reduction tank; and according to a detection result of the material level detection device, the feeding rate of the automatic feeding device and the magnesium discharging rate of the bottom magnesium discharging pipeline are controlled, so that furnace charge in the reduction tank is always kept in steady-state distribution.

The application discloses an electric heating zero-emission magnesium reduction device and a process thereof, and the reduction device comprises a reduction tank, a condensation tank is sealingly connected to the upper end of the reduction tank through a flange, a crystallizer is arranged in the condensation tank, a vacuumizing device is further connected to the condensation tank through a pipeline, a plurality of inner electric heaters are inserted into the reduction tank from the bottom, and an outer electric heater is further wrapped outside the reduction tank; the gas heating in the traditional Pidgeon process is replaced by electric heating, so that the very serious pollution emission is changed into zero emission; and the various high-temperature corrosion of the traditional reduction tank under the gas flame barbecue is changed into basically zero corrosion, the service life of the reduction tank is greatly prolonged, and a large amount of steel is saved; the temperature control of the traditional Pidgeon process is difficult, leading to poor quality of the reduced magnesium, and the electric heating can realize accurate control of the temperature and improve the quality of the reduced magnesium.

The invention discloses a method for extracting calcium and silicon by using magnesium smelting waste residues, and relates to a magnesium smelting waste utilization method, which comprises the following steps: sieving the magnesium smelting waste residues to obtain fine powder; adding the calcium extraction agent solution and the magnesium smelting waste residue powder into a reaction container to enable the magnesium smelting waste residue powder to fully react with the calcium extraction agent solution; monitoring the calcium extraction rate of the reaction system; and carrying out acid treatment on the silicon-containing leaching residues to obtain silicon dioxide. According to the method, more than 90% of calcium components and more than 95% of silicon components in the Pidgeon process magnesium smelting waste residues containing dicalcium silicate, magnesium oxide, calcium ferrite and ferroferric oxide are separated and extracted, the calcium components are used for preparing calcium carbonate and other products, the silicon components are mainly produced in the form of silicon dioxide, and the purity of the silicon dioxide can reach more than 95%. High-value utilization of the magnesium smelting waste residues is realized, and new reference guidance is provided for cyclic utilization of solid waste resources and sustainable development of the magnesium smelting industry.

The present invention discloses a device and method for analyzing and sampling magnesium oxide content in magnesium slag of Pidgeon process magnesium smelting, which relates to the technical field of magnesium smelting by Pidgeon process, and includes a support seat and a depth adjustment mechanism, wherein a motor 1 is installed on the right part of the top wall of the support seat, and a hydraulic rod is fixedly connected to the top wall of the motor 1, a position adjustment mechanism is arranged on the telescopic end of the telescopic bracket, and a depth adjustment mechanism is arranged on the position adjustment mechanism, and a sampling and mixing mechanism is arranged on the support seat. The present invention cooperates with the position adjustment mechanism and the depth adjustment mechanism to synchronously change the positions of multiple sampling boxes, expand the sampling area and range, and ensure the diversity of samples; the depth adjustment mechanism and the sampling and mixing mechanism cooperate to sample multiple sampling points at different depths, and disperse and mix the magnesium slag sampled at multiple locations to improve the representativeness of the samples; and the cooperation and adjustment between the various mechanisms realize the contactless operation of the sampling process.

The invention discloses a spiral screen type pulverization slag quenching furnace and a solid waste waste heat recovery low-carbon environment-friendly system and method.The spiral screen type pulverization slag quenching furnace comprises a furnace body, and the upper portion of the furnace body is provided with a slag inlet, an insertion plate sealer and a hydraulic rotary sealer; an ash residue spiral sieve is arranged in the furnace body; sieve filtering holes are gradually reduced; the first-stage spiral ash primary screen, the first-stage spiral ash secondary screen, the second-stage spiral ash primary screen, the second-stage spiral ash secondary screen and the primary side fine screen are sequentially connected, and the third-stage spiral ash primary screen, the third-stage spiral ash secondary screen and the secondary side fine screen are fixedly connected according to the size of screen holes from small to large. The solid waste waste heat recovery low-carbon environment-friendly system comprises a spiral screen type pulverization slag quenching furnace, a calcination and thermal reduction furnace, a cyclone dust collector, a dust hydration treatment pond, a fine screening device, expansion power generation equipment, a gas-water heat exchange station and the like, and waste heat recovery gradient utilization and solid waste environment-friendly treatment of waste heat ash in Pidgeon process magnesium smelting are achieved.

The invention provides a Pidgeon method vertical tank bottom magnesium discharging low-energy-consumption furnace charge steady-state control method which comprises the following steps: acquiring real-time distribution data of particles from a furnace charge feeding system, extracting position and density information of the particles by utilizing an image recognition algorithm, calculating a distribution uniformity index in combination with a preset uniform distribution model, and calculating the distribution uniformity of the particles according to the distribution uniformity index. The discrete degree of particle distribution is quantified; evaluating the parameter correlation matrix, judging whether parameter conflicts exist or not, and if the conflicts are detected, optimizing parameter combinations through a genetic algorithm, obtaining process parameter data again and updating the parameter correlation matrix until the parameters are coordinated and consistent; and constructing a comprehensive prediction model based on a machine learning algorithm by utilizing the updated distribution uniformity index, the heat transfer cumulative change trend and the coordinated and consistent process parameter combination, and predicting the reduction reaction efficiency and the product quality.

The invention discloses a preparation system of magnesium metal and comprehensive utilization equipment and process of magnesium-containing ore. The preparation system comprises a grinding mechanism; a fluidized calcining mechanism; a digestion mechanism; a carbonization mechanism; an intermediate processing mechanism; a roasting mechanism; and a reduction furnace. The system comprises a grinding mechanism, a fluidized calcination mechanism, a digestion mechanism, a carbonization mechanism, an intermediate treatment mechanism, a roasting mechanism and a reduction furnace which work cooperatively to form a complete magnesium metal production chain. And the grinding mechanism grinds the magnesium-containing ore into a powdery material, so that a proper raw material form is provided for the subsequent calcining process. And then, the fluidized calcining mechanism is used for calcining the powdery material, and the process not only improves the calcining efficiency, but also reduces the energy consumption. According to the design of the whole system, the utilization rate of resources is increased, energy consumption and emission are remarkably reduced, and the industrial problems such as high energy consumption, low resource utilization rate, large slag amount and high emission in the traditional Pidgeon process magnesium smelting process are solved.