Abstract: The present disclosure provides a method and an apparatus for modeling a digital model of a production system, wherein the method comprises: dividing a process flow of the production system according to the process to obtain a plurality of process units to be constructed and link units; determining the process relationship between the process units, and constructing a digital model architecture, a flow model and an environment model; and constructing a digital model corresponding to the system flow according to the digital model architecture, the flow model and the external environment. With the solution of the present disclosure, it is able to realize the modeling of the process flow for complex production systems and improve the process control efficiency of the production system.

Abstract: The invention relates to the technical field of process industry, and discloses a modeling method, a generating method, a device and a medium of a link unit. The modeling method comprises the following steps: build an inlet pipeline model; build an outlet pipeline model; build a functional equipment group model to obtain a digital model of a link unit, wherein the functional equipment group model comprises at least one functional equipment, and the types of functional equipment include at least one of the following: a buffer, a stirrer and a pressurizer, and whether each functional equipment is connected to a communication pipeline is controlled by a equipment regulator. The present disclosure can be used to integrate pipelines, buffers, stirrers, pressurizers, regulators, etc. between processes. The structured link unit greatly simplifies the building process of complex production system models.

Abstract: The present disclosure provides a melt electrospinning device. The melt electrospinning device includes a melting unit, a spinning unit, an electrostatic generating unit, a collection unit, and a sealed cavity. A lining of the melting unit is made of a material having a melting point greater than 500° C. The spinning unit is connected to the bottom of the melting unit and includes a spinneret made from a conductive material having a melting point greater than 500° C. The melt electrospinning process is performed in the sealed cavity. The present disclosure further provides a melt electrospinning method.

Abstract: The invention provides a method and a device for controlling a production system based on a simulation model, belonging to the technical field of industrial process control. The main purpose of the invention is to improve the accuracy of identifying bottlenecks in the production system through a simulation model and to solve the problem that the existing operation rate obtained by simple estimation based on experience has a large error. The method comprises the following steps: connecting simulation modules based on the process flow of the production system to generate an initial simulation model, and optimizing the initial simulation model based on the maintenance parameters of the production system to obtain an optimized simulation model; Based on the optimized simulation model, identify the bottleneck of the production system or determine the operation rate of the production system.

Abstract: Provided are a method and a system for processing a rare earth concentrate ore. The method comprises (1) mixing the rare earth concentrate ore and concentrated sulfuric acid, thereby obtaining a mixed slurry and a first fluorine-containing gas; (2) mixing the mixed slurry and an initiator liquid for acidolysis, thereby obtaining a clinker and a second fluorine-containing gas; (3) subjecting the clinker to leaching with water, thereby obtaining a leached slurry; (4) subjecting the leached slurry to a solid-liquid separation, thereby obtaining a filtrate and a leached slag, and recycling the leached slag to step (2) for acidolysis again.

Abstract: Provided is a device for continuously decomposing a rare earth concentrate ore. The device includes a body, a bidirectional propeller and a driving assembly. The body has a material inlet, two liquid inlets and two exhaust gas outlets disposed at the top of the body, two material outlets disposed at the bottom of the body and a heat preservation chamber provided inside a side wall of the body. The bidirectional propeller is provided in the body and extends along a length direction of the body. The driving assembly is connected to the rotating shaft.

Abstract: A method and apparatus for preparing a composite, in which the angle between the apparatus base and the apparatus body is adjusted by the elevator device, the solid raw material is loaded into the reactor by the solid feeding device, the main reaction gas, the auxiliary gas and the carrier gas are introduced from the front gas intake unit into the main reaction zone at a preset ratio, followed by the active material deposited on solid particles, the post-processing reaction gas is introduced from the middle gas intake unit to the post-processing reaction zone to form a functional layer on the active material, the prepared composite powder is separated and collected from the gas-solid mixture in the collection device. The exhaust gas is released from the exhaust manifold into an exhaust gas treatment system after minority powder filtered by the filter.

Abstract: A method and apparatus for preparing a composite, in which the angle between the apparatus base and the apparatus body is adjusted by the elevator device, the solid raw material is loaded into the reactor by the solid feeding device, the main reaction gas, the auxiliary gas and the carrier gas are introduced from the front gas intake unit into the main reaction zone at a preset ratio, followed by the active material deposited on solid particles, the post-processing reaction gas is introduced from the middle gas intake unit to the post-processing reaction zone to form a functional layer on the active material, the prepared composite powder is separated and collected from the gas-solid mixture in the collection device. The exhaust gas is released from the exhaust manifold into an exhaust gas treatment system after minority powder filtered by the filter.

Abstract: A system for testing a rheological behavior of a slurry comprises a first stirring reactor, a second stirring reactor, a material supply pipe, a driving device, and a pressure detection member. The driving device has a first state and a second state. In the first state, the driving device drives a slurry in the first stirring reactor to be outputted to the second stirring reactor. In the second state, the driving device drives the slurry in the second stirring reactor to be outputted to the first stirring reactor. The pressure detection member is used to measure a pressure level in the material supply pipe.

Abstract: The present disclosure discloses a method and device for removing iron in an iron-containing solution in hydrometallurgy. This method comprises the steps of: adding an iron-containing solution in hydrometallurgy into a reactor through a first homogenizing distributor, controlling concentration of the ferric iron in the reactor below 1 g/L, controlling pH of the solution in the reactor to be 2.5˜4, the temperature to be 65˜100° C., and the reaction duration to be 1˜3 hours, performing solid-liquid separation for the solution after reaction, and removing the iron in the iron-containing solution in hydrometallurgy in the form of goethite.

Abstract: Disclosed is a fuming furnace with a lead collecting and discharging function, the fuming furnace comprising a furnace body; the furnace body is provided with a hearth therein and a tuyere thereon; the bottom of the hearth forms a molten pool; the furnace body is further provided with a slag discharging outlet and a lead discharging outlet thereon; the furnace body comprises a furnace bottom water jacket and a hearth water jacket; the furnace bottom water jacket is provided with a refractory brick layer at the inner wall thereof; the refractory brick layer is provided with a lead collecting and discharging channel therein for collecting and discharging lead; the lead collecting and discharging channel is in communication with the lead discharging outlet, and the lead collecting and discharging channel is in communication with the molten pool via joints between the refractory bricks forming the refractory brick layer.

Abstract: The present disclosure discloses a refractory protection layer for a metallurgical furnace, which includes a insulating layer, a permanent layer built with a refractory brick and arranged on the insulating layer, a working layer built with a refractory brick and arranged on the permanent layer, and a first anti-permeation layer made of ramming mass and arranged on the working layer. The refractory protection layer for the metallurgical furnace described in the present disclosure embodiments has both high temperature resistance and good permeability resistance.

Abstract: The present disclosure discloses a lance, including a lance head having: a first tube; a second tube, in which the first tube is fitted over the second one; and a through hole tube, in which the through-hole tube has a plurality of axial through holes, a second channel is defined by the first tube, the second tube and the through hole tube, and a first channel is defined by an inner cavity of the second tube and the plurality of axial through holes; an air inlet tube in fluid communication with the second channel; and an air inlet seat connecting with the second tube and having an air inlet channel which is in fluid communication with the first channel. The lance according to the present disclosure can spray uniform gas and can reduce energy consumption. The present disclosure also discloses a multi-fluid lance device equipped with the lance.

Abstract: A lance including: a central pipe having a wear-resistant ceramic layer coated on an inner wall thereof; a central casing pipe having a casing pipe groove in an outer wall thereof, in which the central casing pipe is fitted over the central pipe; an intermediate pipe fitted over the central casing pipe, in which a combustion-supporting gas chamber is formed between a front part of the central pipe and the intermediate pipe, and an intermediate pipe groove is formed in an outer wall of the rear part; and an outer casing pipe fitted over the intermediate pipe, in which a cooling medium chamber is formed between a front part of the intermediate pipe and the outer casing pipe, and a cooling medium injection channel is defined by an inner wall of the outer casing pipe and the intermediate pipe groove.

Abstract: The invention provides a lance including: a central pipe having a wear-resistant ceramic layer coated on an inner wall thereof; a central casing pipe having a casing pipe groove in an outer wall thereof, in which the central casing pipe is fitted over the central pipe and has a length less than that of the central pipe; a central pipe fitted over the intermediate pipe, in which a combustion-supporting gas chamber is formed between a front part of the central pipe and the intermediate pipe, an external diameter of a rear part of the intermediate pipe is greater than an external diameter of a front part of the intermediate pipe, and an intermediate pipe groove is formed in an outer wall of the rear part; and an outer casing pipe fitted over the intermediate pipe, in which a cooling medium chamber is formed between the front part of the intermediate pipe and the outer casing pipe, and a cooling medium injection channel is defined by an inner wall of the outer casing pipe and the intermediate pipe groove.