19 results about "Anode effect" patented technology

This utility model relates to the field of vertical connecting chain links, specifically a super corrosion-resistant and ultra-strong mining vertical connecting chain link, comprising an upper connecting chain link body and a lower connecting chain link body. The upper and lower connecting chain link bodies have identical structures and are mirror-connected. The upper and lower connecting chain link bodies are threadedly fixed by a central bolt. Both the upper and lower connecting chain link bodies have metal plating on their sides. The upper and lower connecting chain link bodies can be assembled and used together. This design further improves the load-bearing capacity of the connecting chain link during use and enhances its stability. The metal plating on the outer walls of the upper and lower connecting chain link bodies forms a physical barrier and utilizes the sacrificial anode effect to achieve corrosion protection, thereby increasing the service life of the connecting chain link.

The utility model discloses a granularity segregation prevention structure for an alumina stock bin, which comprises a stock bin body and a material guide pipe, the material guide pipe is fixedly arranged in the stock bin body, the outer wall of the material guide pipe is provided with an open pore, the material guide pipe is provided with a turning plate, and the turning plate is rotatably arranged at the port of the open pore. A baffle is arranged on the inner wall of the stock bin, the baffle is arranged in an inclined mode, and one end of the hinge is movably installed in an included angle between the baffle and the stock bin. According to the particle size segregation prevention structure for the aluminum oxide stock bin, through the cooperation of the material guide pipe and the turning plate, the flying phenomenon of aluminum oxide in the stock bin can be reduced, the particle size segregation of the aluminum oxide in the stock bin is reduced to the maximum extent, the anode effect coefficient of an electrolytic bath is greatly reduced, and the service life of the electrolytic bath is prolonged. A good feeding condition is provided for a zero anode effect production mode; and moreover, the generation amount of perfluorocarbon can be reduced, greenhouse gases are greatly reduced, and the method is green and environment-friendly.

The invention relates to the technical field of anode current collection and analysis, and discloses an aluminum-silicon alloy electrolytic cell anode current distribution detection and analysis method and system, and the method comprises the steps: presetting a preset measurement point and a measurement distance, collecting a bus voltage based on an equidistant collection method, and carrying out the conversion to obtain the anode current of each measurement point; performing multiple times of anode current acquisition on the aluminum-silicon alloy electrolytic cell based on the acquisition timestamps to obtain a plurality of anode current distribution factors, and transmitting the anode current distribution factors to a server; performing current analysis on the anode current and the ideal anode current, and determining an anode current distribution factor; the anode current analysis coefficient is calculated according to the anode current distribution factor of the preset measurement point, a guide production strategy is generated, real-time and accurate collection and detection of the anode current are achieved, and dynamic and accurate analysis of the anode current is achieved according to time sequence changes and current data changes. Production is guided for anode effect forecast, hammer head long ladle forecast, homogenization polar distance, alloy mother liquor fluctuation forecast and the like.

To provide a method for producing a fluorine-containing compound, hardly causing an anode effect when producing the fluorine-containing compound such as fluorine gas by electrolyzing an electrolytic solution.SOLUTION: The method for producing a fluorine-containing compound includes an electrolysis step of electrolyzing an electrolytic solution using an anode and a cathode to produce a fluorine-containing compound. The electrolytic solution contains hydrogen fluoride, a metal fluoride, and a complex ion represented by the chemical formula [MXn] m -. In the chemical formula [MXn] m -, M represents an ion of a d-block element having 4 or more and 8 or less electrons in the outermost d-orbital, X represents a halogen atom, m representing the valence of the complex ion is an integer of 1 or more and 5 or less, and n representing the number of X's is an integer of 2 or more and 10 or less.SELECTED DRAWING: None

The invention discloses an aluminum electrolysis anode effect identification method and device based on multiple time windows, and relates to the technical field of aluminum electrolysis, the method comprises the steps that a target aluminum electrolysis cell is divided into multiple areas, and each area comprises at least one pair of anodes; sampling the cell voltage and the region current of each region according to a set sampling period, traversing each region in sequence in a circulating manner, and when traversing the current region, obtaining a region current time sequence and a cell voltage time sequence at the current moment and within a set duration before the current moment; on the basis of multi-time window data, whether the aluminum electrolysis anode effect occurs in the current area or not is identified according to the resistance difference of the equivalent area, the cell voltage variation coefficient and the cell voltage average value, if yes, anode effect early warning is given out, the number of times of aluminum oxide blanking is set for the current area and the area adjacent to the current area, and if not, the next area is traversed; and all the regions are traversed. The aluminum electrolysis production stability can be improved.

The invention provides a doped modified carbon anode for inhibiting an anode effect as well as a preparation method and application thereof, and belongs to the field of aluminum electrolysis. The doped modified carbon anode comprises the following raw materials: a carbon material, an adhesive and a dopant, the dopant comprises at least one of chloride, fluoride and carbonate, and the mass of the dopant is 5-30% of the total mass of the carbon material and the adhesive. The doping agent is added into the carbon anode, so that the critical current density of the carbon anode can be improved, and the anode effect in the aluminum electrolysis process is inhibited. And moreover, the emission of strong greenhouse gas-perfluorocarbon gas can be reduced, and the green and efficient production of electrolytic aluminum can be realized.

The utility model discloses a polarity-variable power supply device for a four-electrode direct-current submerged arc furnace, which relates to the technical field of submerged arc furnace power supply and comprises an electrode I, an electrode II, an electrode III and an electrode IV, the working polarity between the first electrode and the second electrode is adjusted through a polarity adjustable device, the working polarity between the third electrode and the fourth electrode is adjusted through a polarity adjustable device, and a first rectifying device and a second rectifying device are arranged on the two sides of an electrode set formed by the first electrode, the second electrode, the third electrode and the fourth electrode respectively. And water coolers are arranged on the first rectifying device and the second rectifying device. The first rectifying device and the second rectifying device are matched with each other, the polarity adjustable device is utilized, the anode effect in the production process of the direct-current electric furnace is obviously improved, electrode roasting is facilitated, production is guaranteed, the furnace does not need to be shut down during polarity switching, the switching time is short, and the polarity adjustable device is matched with the water cooler, so that the working temperature is low, the loss is small, and more energy is saved.

The invention relates to the technical field of electrolytic aluminum, in particular to an aluminum electrolysis cell bus structure which is characterized in that one ends of first to sixth power inlet side cathode soft belts are connected with a steel bar, and the other ends of the first to sixth power inlet side cathode soft belts are connected with one end of a second power inlet side bus; the other end of the second power inlet side bus is connected with one end of the second stand column bus, the other end of the second stand column bus is connected with one end of the anode large bus, and the other end of the anode large bus is connected with a next aluminum electrolysis cell through an anode guide rod. When the current in the old electrolytic cell is locally concentrated in a pole changing, anode effect and the like, the current can be quickly released at the outlet of the cathode soft belt, so that the current distribution returns to a normal state, the uniformity and the stability of the cathode current distribution can be improved, and the generation of black voltage is reduced, thereby saving energy, reducing consumption and saving cost.

The application discloses an emergency crust breaking and discharging system for an aluminum electrolysis cell, and relates to the technical field of aluminum electrolysis production control. The system comprises an emergency crust breaking and discharging device and an electrolysis cell actuator. The emergency crust breaking and discharging device is used for determining corresponding discharging data of the electrolysis cell according to online acquisition data corresponding to the electrolysis cell when it is monitored that the running condition of the electrolysis cell is an abnormal condition, generating a discharging control instruction corresponding to the discharging data, and sending the discharging control instruction to the electrolysis cell actuator, so that the emergency crust breaking and discharging device is used for controlling at least one electrolysis cell. The electrolysis cell actuator is used for receiving the discharging control instruction sent by the emergency crust breaking and discharging device, and automatically controlling the electrolysis cell in a single-point uniformity manner according to the discharging control instruction. Therefore, the discharging control response efficiency is improved, the concentration of aluminum oxide in the electrolysis cell is balanced, the occurrence of furnace bottom precipitation and anode effect is avoided, the electrolysis cell can still be stably operated in an emergency state, and the safety of the electrolysis series is ensured.

The application provides a large-scale aluminum electrolysis cell local anode effect prediction method, and belongs to the technical field of aluminum electrolysis. The method comprises the following steps: obtaining an anode rod current sequence, and performing fluctuation monitoring on the obtained anode rod current sequence; if fluctuation of the anode rod current is monitored, tracking prediction is performed on the anode rod current in the region where the anode rod is located and where no fluctuation occurs by using an ARIMA model, and tracking prediction is performed on the anode rod current in the region where the anode rod is located and where fluctuation has occurred by using an LSTM-GRU hybrid neural network, wherein ARIMA represents an autoregressive moving average model, LSTM represents a long short-term memory neural unit, and GRU represents a gated recurrent unit; and the local anode effect grade in the region is determined based on the tracking prediction results of the ARIMA model and the LSTM-GRU hybrid neural network. By using the application, the prediction accuracy of fluctuating current and the prediction accuracy of local anode effect can be improved, and the calculation amount is reduced.

The invention provides a machine vision-based aluminum electrolysis cell crust breaking position recognition and blanking cylinder precise collaboration method and system, and belongs to the technical field of machine vision, and the method comprises the following steps: collecting an aluminum electrolysis cell visual image and infrared temperature data through double-point complementation, fusing to construct a real-time three-dimensional model, and precisely determining a crust breaking scheme; binocular vision ranging is adopted to calculate crust breaking time, an initial blanking scheme is generated in combination with blanking historical data, blanking parameters are dynamically corrected on the basis of a real-time blanking hole contour fitting result, and crust breaking and blanking closed-loop precise cooperation is achieved. Millimeter-level positioning of the crust breaking position is achieved, the material feeding accuracy is improved, the anode effect occurrence rate and production energy consumption are reduced, the device is suitable for the severe working conditions of high temperature, strong magnetism and high dust of the aluminum electrolysis cell, and the electrolytic aluminum production efficiency and the intelligent level are remarkably improved.

The application provides an anode effect early prediction method based on an adversarial shapelet learning, which is applied to diagnosis and prediction of fault positions and fault signal trends.The steps are as follows: firstly, an adjacency matrix of an anode current signal is calculated according to the position relationship of anodes of an aluminum electrolytic cell; secondly, a shapelet learning classifier with an adaptive spatial structure is acquired according to the adjacency matrix of the anode current signal, and a multi-head adversarial neural network is constructed; finally, the adversarial neural network is optimized by using an adaptive network shapelet learning method, so that an adversarial neural network model is obtained; and a classification result is obtained by inputting an input time sequence into the adversarial neural network model.The self-adjusting adjacency matrix is established as an adaptive network and a diversity regularization constraint for subsequent subsequence feature learning; and the adversarial network is combined with the shapelet learning method, so that the interpretability of the shapelets is strengthened.

The invention relates to the technical field of epoxy zinc-rich coatings, in particular to an intelligent self-repairing epoxy zinc-rich coating based on an MOFs material and a preparation method of the intelligent self-repairing epoxy zinc-rich coating. The intelligent self-repairing epoxy zinc-rich coating based on the MOFs material comprises the following components in percentage by mass: 0.25%-1.0% of a BTA (at) ZIF-8 / CNTs composite material, 40%-60% of zinc powder, 30%-45% of epoxy resin and 10%-15% of a curing agent. The BTA-coated ZIF-8 / CNTs composite material is introduced as a functional filler, the structural compactness and corrosion resistance of the coating are enhanced while the sacrificial anode effect of the zinc powder is maintained, the service life of a metal matrix in a complex service environment can be remarkably prolonged, and the coating is suitable for various fields such as ocean structures, bridges and petrochemical devices. The method has wide application prospects in the field of metal matrix surface protection.

The invention provides a composite anode for molten salt electrolysis as well as a preparation method and application of the composite anode. The composite anode comprises the following components in percentage by mass: 0.01%-10% of metal magnesium, 0.1%-6% of metal fluoride, 0-3% of metal oxide and the balance of nickel. The preparation method comprises the steps that nickel and magnesium are subjected to vacuum melting to form nickel-magnesium alloy and pulverized; carrying out ball-milling mixing on the alloy powder, metal fluoride and metal oxide; the mixed powder is subjected to hot press molding at the temperature of 600-1500 DEG C and the pressure of 50-60 MPa; processing into an anode profile; and immersing into a hydrofluoric acid solution with the concentration of 10%-45% to carry out surface passivation treatment. The composite anode is suitable for preparing fluorine gas or nitrogen trifluoride through electrolysis. Through the synergistic effect of magnesium alloying and fluoride / oxide, the corrosion resistance and structural compactness of the anode are remarkably improved, the anode effect approaches to zero, the service life is prolonged to 300 days or above, the current efficiency is high, and the technical problems that an existing carbon anode and an existing nickel anode are short in service life, rapid in dissolution and serious in pollution are effectively solved.

The invention discloses a crust breaking hammer head for aluminum electrolysis and a preparation method. The technical problem that in the prior art, the sticky bag cleaning efficiency of a hammer head is not high is solved. The crust breaking hammer head comprises a hammer body, a core body and a hammer handle, the hammer body is provided with a first end and a second end which are oppositely arranged in the axial direction, the first end of the hammer body is blocked, the second end of the hammer body is open, the hammer body is provided with a cavity, and the cavity extends towards the first end of the hammer body along the second end of the hammer body; the core body is arranged in the cavity of the hammer body and is in interference fit with the cavity of the hammer body; the hammer handle is connected with the second end of the hammer body and blocks the second end of the hammer body. Wherein the thermal conductivity of the core body is greater than that of the hammer body, and the corrosion resistance of the hammer body is greater than that of the core body. Therefore, the hole opening rate of the fire holes can be increased, the anode effect occurrence frequency is reduced, and the cleaning efficiency is improved; and corrosion of the crust breaking hammer head and repeated impact on the crust breaking cylinder caused by blockage of the crust breaking head can be reduced, so that the service life of the crust breaking hammer head is prolonged, and the production cost is reduced.

Provided is a method for manufacturing an anode where the anode effect is not likely to occur even when an electrolytic solution containing hydrogen fluoride and a metal fluoride is electrolyzed and used for electrolytically synthesizing fluorine gas. The method for manufacturing an anode for fluorine gas electrolytic synthesis includes an anodic treatment step. The anodic treatment step is a step of immersing not only an anode (21) that is an anode substrate including a carbon material but also a cathode (22) in a mixed liquid (10) for manufacturing an anode containing hydrogen fluoride, a metal fluoride, and potassium hexafluoronickelate (IV) and causing a current to flow between the anode (21) and the cathode (22) to perform an anodic treatment of the anode substrate such that nickel fluoride is attached to a surface of the anode substrate.

The invention relates to the technical field of aluminum fluoride, in particular to an ultralow-impurity high-purity aluminum fluoride crystal material and a preparation method thereof. The method comprises the following steps: reacting ultrapure water, hydrofluoric acid and aluminum hydroxide to obtain fluorine-containing aluminum mother liquor; after hydrogen peroxide is added for oxidation and filtration, deep purification is performed through a three-section series bed system, and a bed is filled with fluorine-balanced chelating resin treated by hydrofluoric acid or ammonium fluoride; evaporating and concentrating the purified mother liquor under reduced pressure, adding seed crystals for crystallization, washing with hydrofluoric acid and ethanol, and drying and roasting under nitrogen. The product is extremely low in impurity content, uniform in crystal granularity and good in fluidity, the anode effect can be remarkably reduced in aluminum electrolysis, and the current efficiency and the operation stability are improved.

This invention discloses a sulfur-bonded anti-corrosion structure for reinforced concrete and its preparation method. Through the chemical bonding effect of the sacrificial anode anti-corrosion layer and the bonding layer, the mechanical interlocking effect of the rough surface of the reinforced concrete, and the interface densification achieved by preheating and synergistic casting, the interface bonding strength reaches ≥3.0 MPa, an improvement of over 60% compared to traditional processes, effectively solving problems such as debonding and hollowing. The sacrificial anode anti-corrosion layer provides dual protection functions of physical shielding and electrochemical protection. Even if the coating is partially damaged, the reinforced concrete can still be protected through the sacrificial anode effect, fundamentally preventing electrochemical corrosion between the reinforced concrete and sulfur. The anti-corrosion life is more than twice that of traditional processes, making it suitable for harsh environments such as chemical plants and high-salt-spray environments. The coating application and preheating casting processes are simple to operate, requiring no complex equipment, and can meet the needs of rapid setting and early strength projects. It is applicable to various engineering scenarios such as roads, bridges, hydraulic structures, and chemical industrial park floors.

The invention discloses a graphene-zinc powder composite material with an anti-corrosion effect and a preparation method of the graphene-zinc powder composite material, and belongs to the technical field of metal powder surface modification. The preparation method comprises the steps of preparation of modified graphene, preparation of cation modified PEG-PLA micelle sol, preparation of composite sol, preparation of graphene-zinc powder composite mixed liquid and forming. The silane coupling agent modified graphene and the cationic micelles are directionally attached and cooperated, so that the interfacial compatibility and the coating compactness are improved, and the problems of agglomeration and pore defects are solved; a dual anti-corrosion system is constructed by means of physical barrier of graphene and sacrificial anode effect of zinc powder, and collaborative optimization of adhesive force, conductivity and low water absorption rate is realized by combining water-borne epoxy resin. The composite material is uniform in dispersion, excellent in coating compactness, low in water absorption rate, capable of effectively blocking moisture permeation and erosion, outstanding in corrosion prevention long-term effect and suitable for metal corrosion prevention requirements of high-humidity, ocean and other humid complex working conditions, and the corrosion prevention technology is promoted to develop towards the low-permeability and high-durability direction.