10results about How to "Improve concentrate grade" patented technology

The application provides a graphite ore flotation intelligent optimization method and system based on AI visual identification, and relates to the technical field of mineral processing. The method comprises the following steps: acquiring a flotation foam image in real time through an image acquisition module, extracting multi-dimensional features such as foam size distribution, stability, color depth, texture and flow rate after improved bilateral filtering denoising and adaptive histogram equalization enhancement, predicting the graphite grade, recovery rate and foam state category according to the features by an attention-enhanced ResNet50 model, dynamically generating an optimal reagent scheme by combining a safety constraint and a reward function through a reinforcement learning agent based on a deep deterministic policy gradient, and finally automatically adjusting a reagent feeding device by a control execution module to realize closed-loop optimization control. The application can accurately predict the indicators of the foam and dynamically optimize the reagent feeding scheme according to the indicators, and significantly improves the production efficiency.

The application provides a collector for apatite flotation and a preparation method and use method thereof, and relates to the technical field of mineral flotation. Raw materials of the collector comprise, in mass fractions, 50-100 parts of discarded cooking oil, 50-100 parts of cottonseed crude oil, 10-30 parts of oleic acid and 10-40 parts of nonylphenol polyoxyethylene ether. The collector provided by the application has a synergistic effect between multiple components, can effectively improve the defects of poor selectivity, low low-temperature solubility and insufficient dispersibility of traditional fatty acid collectors, improve the flotation recovery rate and concentrate grade of low-grade complex associated apatite, and reduce the dosage of gangue inhibitors.

This invention belongs to the field of mineral processing technology and discloses a method for promoting the sulfidation flotation of hemimorphic ore using ethylenediaminetetramethylenephosphonic acid (EDTA). Addressing the problem of low sulfidation efficiency and poor flotation effect in hemimorphic ore due to the shielding of surface zinc active sites by silica components, EDTA is added to the slurry for surface pretreatment before the sulfidation step. EDTA strongly chelates with zinc ions on the surface of hemimorphic ore, exposing and activating zinc sites, increasing surface reactivity, and promoting the formation of a denser and more continuous zinc sulfide film in subsequent sulfidation reactions. After EDTA pretreatment, a sulfidating agent, activator, collector, and frother are added sequentially for conventional flotation, resulting in a high-recovery hemimorphic ore concentrate. Single-mineral flotation tests show that this invention can increase the hemimorphic ore flotation recovery rate from 52.31% in traditional methods to over 87.28%, offering advantages such as simple process and environmental friendliness, providing a new approach for the efficient utilization of zinc oxide ore.

This invention discloses a low-nickel matte grinding and flotation process to improve copper-nickel recovery, comprising the following steps: S1, grinding; S2, roughing treatment; S3, cleaning treatment; S4, scavenging treatment; S5, regrinding and re-selecting the middlings; S6, merging the first concentrate from step S3 with the second concentrate from step S5 to obtain the final copper-nickel concentrate. This low-nickel matte grinding and flotation process utilizes a specially modified collector, combined with a closed-loop process of roughing-scavenging-middling regrinding and re-selection, and a differentiated step-by-step reagent dosing system, to achieve efficient and synergistic recovery of copper and nickel metals from low-nickel matte. The process flow is complete, and the process parameters at each stage are reasonably matched. While ensuring the acquisition of high-grade copper-nickel concentrate, it minimizes the loss of valuable metals in the tailings, significantly improving the final copper-nickel recovery rate. The overall technical effect is superior to traditional flotation methods using a single collector or simple mixed reagents.

The invention provides a fine fraction flotation machine with an inflation system and a using method of the fine fraction flotation machine. The fine fraction flotation machine comprises a groove body, a foam groove, a scraper component, an ore pulp annular pipe, an air annular pipe, a plurality of inflator assemblies and a tailing box. The ore pulp ring pipe and the air ring pipe are concentrically arranged at the top of the tank body, and the inflator assemblies are evenly arranged along the ore pulp ring pipe and used for fully mixing ore pulp and air in a pipeline and shearing the mixture to form fine bubbles, and then the fine bubbles are evenly sprayed into the cross section of the tank body through the branch pipes. No mechanical stirring exists in the tank body, turbulent flow is rapidly weakened after mixed fluid enters the tank body, and efficient static separation of mineralized bubbles and gangue minerals is achieved. The collision probability and the recovery rate of fine-grain minerals can be remarkably improved, gangue entrainment is effectively restrained, the concentrate grade is guaranteed, the inflation amount is adjustable, the structure is simple, operation is stable, and the flotation device is suitable for flotation operation of the high-concentration fine-grain minerals.

This invention discloses a hydrocyclone pressure adaptive control method based on a soft-sensor model of slurry flow rate and concentration, comprising the following steps: A. Establishing the soft-sensor model and constructing a training dataset: A pressure transmitter, frequency converter, and current sensor are installed on the outlet pipe of the hydrocyclone feed pump; a current sensor is installed on the motor of the feed pump; and a pressure transmitter is installed on the hydrocyclone feed pipeline. Historical datasets are synchronously collected and correlated within an initial period, and manual timed sampling is also performed. This invention achieves indirect and accurate measurement of key parameters: It creatively utilizes the operating data (speed, current, pressure, liquid level) of existing equipment such as pumps and pipelines, and constructs a high-precision soft-sensor model of flow rate and concentration through advanced machine learning algorithms. This model estimates the slurry flow rate and concentration, which are difficult to measure online using traditional instruments, in real time with low cost and high reliability, breaking through the information bottleneck of hydrocyclone optimization control.

The invention relates to the technical field of intelligent mineral processing, and discloses a mineral flotation performance prediction method and system based on a graph neural network, and the method comprises the steps: 1, obtaining multi-source flotation data, and carrying out the alignment according to discrete moments, and obtaining a standardized flotation input sample; step 2, constructing a dynamic heterogeneous flotation relation graph comprising various types of nodes, process edges and time sequence edges; step 3, establishing a relationship conservation constraint and screening a propagation path to obtain a constraint propagation graph; step 4, calculating a structure ambiguity index and identifying ambiguity sample pairs; 5, carrying out graph neural network message passing to obtain final depth features of the nodes; 6, ambiguity separation is carried out, and grade, recovery rate and comprehensive performance prediction values are obtained; and step 7, constructing a joint objective function, obtaining a prediction model, and outputting a prediction result and an ambiguity metric value. According to the method, effective modeling of the complex process relation in the mineral flotation process and high-precision prediction of the flotation performance are achieved.

The present application relates to a kind of tailings classification scanning device, belong to mineral separation technical field.The device includes: tailings separation unit, with the separation cylinder upper end of mineral separation equipment is connected or with separation cylinder, including tailings overflow weir, configured to discharge tailings in the separation cylinder from the tailings overflow weir;Tailings classification unit is arranged in the periphery of the tailings separation unit, including tailings classification overflow weir, configured to discharge the tailings classified processing, to obtain tailings of different levels;The height value of the tailings classification overflow weir is less than the height value of the tailings overflow weir.The present application can realize the multistage separation of tailings, to obtain different grade and the stable component content of tailings, to reduce the waste of mineral resources, improve the component content qualified rate of each grade product.

The invention relates to the technical field of flotation agents, in particular to a steric hindrance group mixed flotation agent and application of the steric hindrance group mixed flotation agent to flotation separation of quartz and feldspar. According to the technical scheme, the steric hindrance group mixed flotation agent is composed of dodecyl dimethyl benzyl ammonium bromide (BDAB) serving as a collecting agent and sodium dodecyl benzene sulfonate (SDBS) serving as an inhibitor, and the mass ratio of the sodium dodecyl benzene sulfonate to the dodecyl dimethyl benzyl ammonium bromide is 1: 1.1-1: 1.5. According to the neutral flotation method, efficient separation of quartz and feldspar can be achieved under the normal-temperature condition, and environmental pollution and equipment corrosion are avoided; the adopted composite flotation agent is low in toxicity, good in water solubility and small in dosage, the separation selectivity is remarkably improved through sequential addition and steric hindrance synergistic effect, high-grade quartz and feldspar concentrate can be obtained through one-time flotation, the technological process is simple and stable, implementation is easy, and the method is suitable for resource utilization of silicate tailings.

This invention belongs to the field of metallurgical solid waste resource utilization technology, specifically disclosing a method for the comprehensive recovery of copper and iron from copper slag flotation tailings. The method involves magnetic roughing and magnetic scavenging of the copper slag flotation tailings, merging them to obtain a mixed magnetic concentrate; the mixed magnetic concentrate is regrinded to a final density of -0.038 mm (80%–95%); the regrinded product enters the flotation system, using a combination of dimethyl sulfoxide and dispersant red at a mass ratio of 1:6–8 as collectors, and undergoes two roughing, two cleaning, and two scavenging processes to obtain copper concentrate; the copper-removed tailings from the flotation process undergo two roughing and three cleaning magnetic separations to obtain iron concentrate; the middlings from the three cleaning stages are combined with the magnetic scavenging tailings to form the final tailings. This invention processes copper slag flotation tailings with a copper grade of 0.22%–0.31% and an iron grade of 40%–45%, yielding copper concentrate with a copper grade of 6.8%–8.1% and a recovery rate of 43%–48%, and iron concentrate with an iron grade of 54%–60% and a recovery rate of 69%–79%. This invention eliminates the need for roasting, achieves co-recovery of copper and iron, and features a compact process, strong reagent selectivity, and stable performance indicators.