58results about How to "Increase monomer dissociation" patented technology

The invention discloses a high-voltage electric pulse pretreatment method for intensifying the leaching of difficult-to-treat gold ore, and belongs to the technical field of the processing of minerals of gold ore. According to the method, the high-voltage electric pulse crushing pretreatment is realized by utilizing the differences of the dielectric properties of different minerals in ore; a high-voltage electric pulse discharge crushing device is used for carrying out selective crushing on gold-containing ore; gold and a gangue mineral in a gold-containing material are prompted to generate a micro crack and a running crack at an interface; a crystal of a gold-containing mineral is completely dissociated into monomer mineral particles; in this way, the exposed surface area of the gold is increased; therefore, the contact probability of cyanide and a gold grain is increased, so that the sufficient improvement of the leaching rate of the gold is facilitated.

The invention discloses a mineral processing method for efficiently recovering fine-grained low-grade magnetite. Iron concentrate I and tailings I can be obtained by weak magnetic separation with a magnetic induction intensity of 1100-1300Oe; iron concentrate II and tailings II can be obtained from tailings I by strong magnetic separation with a magnetic induction intensity of 0.9-1T; iron concentrate I and iron Concentrate II is combined and ground to -0.045mm, accounting for 75-85% to obtain fine-grained ore II; fine-grained ore II is subjected to weak magnetic separation with a magnetic induction intensity of 1000-1200Oe to obtain iron concentrate III and tailings III; Iron concentrate IV and tailings IV are obtained by strong magnetic separation with a magnetic induction intensity of 0.560-0.783T, and iron concentrate III and iron concentrate IV are combined to obtain a total concentrate, and tailings II and tailings IV are combined to throw tailings. The invention has the characteristics of short process flow, less grinding amount, high beneficiation efficiency, iron recovery rate and high concentrate grade.

The invention discloses a separation process for copper sulphide ore with superfine disseminated grain sizes. The separation process comprises the steps that collectors are added in the coarse grinding process and give full play to the fresh surfaces of minerals, the action efficiency of the collectors on the mineral surfaces is improved, a part of copper ore which is subjected to monomer separation is obtained through quick floatation, rough concentrate is then subjected to low concentration and medium rotating speed concentration operation for two times to obtain high-grade copper concentrate 1, middlings 1 and middlings 2, roughing tailings are subjected to three-section scavenging operation to obtain middlings 3, the middlings 1, the middlings 2 and the middlings 3 are combined and enter ultrafine grinding operation, ultrafine grinding products are subjected to regrinding concentration I and regrinding concentration II operation, and copper concentrate 2 is obtained. The effect of treating the copper sulphide ore with the superfine disseminated grain sizes is good, adaptability is high, and high-grade concentrate products can be obtained.

The invention relates to a calcified-carbonized high-iron red mud recycling iron and tailings cementation method which comprises the process steps of (1) drying and dewatering high-iron red mud treated through a calcification-carbonization method; (2) grinding a slag former and red mud mixture, directly spraying and blowing to a vortex center of a vortex stirring smelting reduction high-temperature furnace without sintering, and rolling into a molten pool; (3) carrying out vortex stirring in the molten pool at 1300 to 1600 DEG C, and meanwhile, feeding a gas-state reducing agent for reducing for 10 to 60min; (4) obtaining reduced molten iron and a melted slag, and carrying out overflow separation; (5) adding ferrochrome and ferromanganese into the molten iron, and smelting into wear-resisting cast iron; (6) adjusting compositions of the melted slag in the vortex stirring high-temperature furnace so as to enable the melted slag to meet the cement requirement; and (7) cooling, crushing and grinding the melted slag so as to directly obtain a cement clinker. According to the calcified-carbonized high-iron red mud recycling iron and tailings cementation method provided by the invention,the utilization rate of the red mud is 100 percent, and the extraction rate of the iron is more than 90 percent.

An ore dressing technology for increasing the quality and recovery rate of ore concentrate includes such steps as crushing, rolling, grinding, and separating. Another two approaches are also disclosed.

The invention relates to a complex copper-lead ore beneficiation separation method adopting a middling returning and regrinding technology, comprising the following steps of: carrying out ore grinding on raw ores, and then carrying out copper roughing; carrying out copper choiceness by adopting flotation on rough concentrates obtained through the copper roughing; and carrying out copper scavenging on tailings obtained through the copper roughing. The complex copper-lead ore beneficiation separation method is characterized in that in the copper-lead separation process of the copper choiceness, middling chosen in a first copper choiceness process is returned to a first copper scavenging process, and the middling chosen in a second copper choiceness process and the middling chosen in a third copper choiceness process are intensively returned to the copper roughing process, therefore, the influence of impurities on grades is prevented, and the purpose of enhancing the grades of the copper concentrates is achieved; in the copper scavenging process, concentrates subjected to primary choiceness are reground, and ore charges are conveyed to the copper choiceness process to form selective milling after regrinding, thereby not only enhancing the dissociation degree of copper-lead ores but also preventing overgrinding, and enabling the copper concentrates to obtain higher recovery rate.

The invention discloses a method for improving ore grinding efficiency through electric pulse ore pretreatment, and belongs to the technical field of mineral processing. According to the method, high-voltage electric pulse crushing pretreatment is achieved through dielectric property differences of different minerals in ore, high-voltage pulse outputs energy with the extremely high power density, electricity is discharged to ore through a high-voltage electrode, multiple microcracks are formed on the interfaces between gangue minerals and useful minerals in ore, accordingly, the strength of ore is lowered, the dissociation characteristic is improved, the ore grinding efficiency can be improved, energy consumption can be reduced, and separation indexes can be modified and improved.

The invention relates to a coarse and fine separation-gravity concentration-magnetic separation combined beneficiation process for processing Anshan type iron ores. The process comprises fine crushing, one-stage closed loop ore grinding, coarse and fine grading, gravity concentration and magnetic separation. The process is characterized in that the process is improved such that fine-crushing-ball-milling-grading flows are replaced by roll milling-ball-milling-grading flows; an edge tail product of a coarse screw is added into a fine grain product for selection; pre-grading before a regrind mill is cancelled; and two-stage continuous weak magnetic separation is adopted for the processed fine grain product for taking the concentration, and a reverse flotation operation is replaced by a finegrain gravity concentration operation subsequently. The grade of raw ores is 27-31%, the final concentrate grade is 66.5-67.3%, and the final tailing grade is 7-8.5%. The process has the advantages that 1) the ore grinding efficiency is improved and the machine-hour is increased; 2) the edge of the coarse screw is classified in fine grain product treatment, so that the loss of magnetic fine iron ores in scavenging is reduced; 3) qualified concentrate is yielded by two-stage weak magnetic separation, so that the production cost is lowered; and 4) reverse flotation is replaced by fine grain gravity concentration, so that the agent cost and the ore pulp warming energy consumption are saved.

The invention discloses a beneficiation method capable of recycling valuable metal from tin magnetic pyrite. The method comprises graded ore grinding work, magnetic separation work, thick flotation work and reselection work. The method has the beneficial effects that a bar grinding machine is adopted to grade ground ore in advance, over pulverizing of tin stone can be reduced, the single separation degree of the tin stone can be increased, and the precondition is provided for effective recycling of the tin stone; secondly, magnetic separation is adopted to remove the magnetic pyrite with the large proportion and the higher iron containing rate, floatation is adopted to remove the magnetic pyrite with the large proportion and the higher sulphur containing rate, disturbance of heavy mineral is reduced, and the advantage is created for subsequent reselection and separation of tin stone; thirdly, the middling re-grinding and reselection flow is adopted, energy consumption of ore grinding can be reduced, over pulverizing of the tin stone is reduced, the single separation degree of tin stone can be improved, the cost is low, and industrial production is easily achieved; fourthly, secondary pollutions in the production process are not needed, and the method is friendly to the environment.

The invention discloses a combined process for recovering antimony, lead and gold from multi-metal tailings. The combined process comprises the following steps: (1) pretreating the tailings, specifically, the tailings are put in a stirring barrel for slurry mixing and scrubbing, and then a flocculating agent is added for selective flocculation; (2) performing superfine purification classificationby using a superfine purification classifier to remove fine mud below 2 microns; and (3) allowing settled sand to enter a hydrocyclone for classification, grinding the classified underflow, returningto the hydrocyclone for classification, and performing classified overflow for flotation to obtain mixed concentrate. According to the process disclosed by the invention, the recovery rate of valuableelements in the tailings is greatly improved and the desliming effect is greatly improved through the measures of pretreatment of the tailings, superfine purification desliming, construction of a selective grinding loop and the like.

The invention provides a low-grade copper-molybdenum ore copper-molybdenum separation method giving consideration to backwater utilization, which comprises the following steps: carrying out copper-molybdenum bulk flotation on copper-molybdenum ore to obtain copper-molybdenum bulk concentrate and tailings; the tailings are subjected to concentration and filter pressing, and low-water-content tailings are obtained; and the copper-molybdenum bulk concentrate is concentrated, pulp mixing is conducted, then copper-molybdenum separation operation is conducted, and molybdenum concentrate and copper concentrate are obtained. According to the invention, sodium hydrosulfide and sodium thioglycollate are combined for use, so that the use amount of sodium hydrosulfide is greatly reduced; a pulp mixing and stirring barrel is arranged before the copper-molybdenum separation operation, the concentration of floating pulp is stabilized, meanwhile, sodium hydrosulfide is adopted for adjusting the potential of the pulp, and through the modes of sodium hydrosulfide reagent removal, high-concentration concentration reagent removal, aeration reagent removal, stirring friction washing and the like, residual reagents in the copper-molybdenum mixing operation in the pulp are reduced. According to the method provided by the invention, copper and molybdenum can be well separated.

The invention relates to a single-roller high-pressure and high-frequency vibrating roller milling crusher which comprises a roller milling crusher main piece, a drive device, a stand, a feeding funnel and a guide plate; the roller milling crusher main piece is installed on the stand and is connected with the drive device and hydraulic devices. The single-roller high-pressure and high-frequency vibrating roller milling crusher is characterized in that the roller milling crusher main piece comprises two bearing seats which are arranged on stand rails respectively, an extrusion roller which is installed on the bearing seats, a fixed extrusion plate which is slantingly arranged on the surface of the extrusion roller correspondingly, and high-frequency vibration exciters which are installed onthe two sides of the bearing seats respectively and perform vibration in a horizontal direction; the bearing seats are connected with the hydraulic devices through springs respectively; the extrusionroller is connected with the drive device through a center axis. The single-roller high-pressure and high-frequency vibrating roller milling crusher has the advantages that 1) the fixed extrusion plate replaces a fixed roller of a high-pressure roller mill, and the equipment cost is lowered; 2) the high-frequency vibration exciters on the bearing seats enable the crushing effect to be better; 3)the springs for connecting the bearing seats with the hydraulic devices respectively enable equipment to be strong in adaptability and reliable in performance.

The invention relates to a grinding method for improving the quality of copper concentrate and reducing impurities, belonging to the technical field of non-ferrous metal mineral processing. In order to solve the problem that the monomer dissociation effect of the existing grinding method is not good, high impurity content in the copper concentrate, the grinding method includes the steps of inputting copper ore into a ball mill to perform rough grinding under the action of a rough grinding medium, inputting the roughly ground product into a hydrocyclone for classification, making settling sandreturn to the ball mill for further rough grinding, enabling the ore particles with certain particle size to enter a pulp stirring tank with the overflow of the hydrocyclone, making the particles enter a roughing flotation machine after stirring for roughing, and obtaining copper rough concentrate after roughing and enabling the copper rough concentrate to enter a horizontal sand mill for fine grinding under the action of fine grinding medium, wherein 80% of the copper concentrate product has particle size less than 25 [mu]m. The invention improves the degree of monomer dissociation, obtains copper concentrate with copper > 25%, silicon < 10% and aluminum < 2%, effectively reduces the content of silicon and aluminum impurities in the copper concentrate, improves the concentrate quality andincreases the product benefit value.

The invention provides a high-voltage pulse pretreatment method for reinforcing cassiterite crushing and sorting, a high-voltage pulse device is adopted, and the high-voltage pulse pretreatment methodcomprises the following steps that (1), a water pump is started, water continuously enters a pulsating insulation cylinder body, and is discharged from a water outlet of a product collector; (2), cassiterite ore is conveyed into a pulse insulating cylinder body through a ore feeding bin and is accumulated on a screen, and the top of the cassiterite ore is in contact with a high-voltage electrode;(3), a power supply is turned on, and discharging is carried out between the high-voltage electrode and a high-voltage negative electrode to enable the cassiterite ore to be broken; (4), through therotation of an eccentric wheel, the lifting of the water flow acts on the ore on the screen, and a small particle part moves downwards; and (5), the crushed cassiterite ore enters the product collector. The method can be used for improving the useful mineral content of crushed products, the monomer dissociation degree of the crushed products is improved, the energy consumption in the subsequent processing process is reduced, and the enterprise cost is reduced.