46results about How to "Improve the quality of selection" patented technology

A beneficiation method for ultrafine fraction cassiterite is characterized in that a swirler is used for desliming to obtain swirler settled sand and deslimed tailings; sulfide ores are separated from the swirler settled sand so that the sulfide ores and desulfurized tailings are obtained; iron is removed from the desulfurized tailings by means of magnetic separation to obtain iron ore concentrate and deironed tailings; flotation tin concentrate and flotation tailings are obtained after secondary roughing flotation, secondary scavenging flotation and tertiary blank concentration flotation for the deironed tailings; and a table concentrator is used for performing gravity concentration for the flotation tin concentrate to obtain tin concentrate, tin middlings and table concentration tailings. The grade of the tin concentrate is higher than 40%, the tin recovery rate of the tin concentrate is higher than 50%, the grade of the tin middlings ranges from 1% to 3%, the tin recovery rate of the tin middlings is higher than 15%, and the overall tin recovery rate of the tin concentrate and the tin middlings is higher than 65%. The beneficiation method for the ultrafine fraction cassiterite is high in recovery rate, low in production cost, high in tin grade and applicable to recovery of the ultrafine fraction cassiterite with the silt content ranging from 10% to 30%.

The multi-metal cassiterite sulfurizing tail concentrating method includes: graded tail throwing with combineed screw concentrating machine and screw chute; floating of the rest tail with phenyl halogenated quaternary ammonium salt and black butyl amine as collecting agent to recover sulfurized mineral of Pb, Sb, Zn, etc and sulfurized mineral oxide of Pb, Sb, Zn, etc while leaving the cassiterite and gangue inside the trough; and recovering cassiterite with sodium carbonate and carboxymethyl polyvinyl alcohol as combined gangue dispersing and inhibiting agent and through stepped floating process. Compared with traditional method, the method has concentrating grade raised by 1-3 times, comprehensive tail loss of about 10 % and 10 % raised recovering rate of Pb, Sb, Zn, Sn, etc.

The invention relates to the technical field of ore beneficiation, and in particular relates to an extremely lean magnetite beneficiating process. The process is characterized by comprising the following steps of: 1) carrying out wet pre-beneficiation on raw ores with grain sizes being 0-5mm and concentration being 35-45%; 2) processing the concentrates obtained through wet pre-beneficiation with a primary closed-circuit milling system formed by primary ball milling and primary classifying and discarding the tailings obtained through wet pre-beneficiation; 3) carrying out first-stage magnetic separation on overflow obtained through primary classifying; 4) processing the concentrates obtained through first-stage magnetic separation with a secondary closed-circuit milling system formed by secondary ball milling and secondary classifying; 5) carrying out second-stage magnetic separation on overflow obtained through secondary classifying; 6) carrying out third-stage magnetic separation on concentrates obtained through second-stage magnetic separation; 7) taking the concentrates obtained through third-stage magnetic separation as the final concentrates with grades being 63-64%; and 8) discarding the final tailings formed by the tailings obtained through first-stage magnetic separation, second-stage magnetic separation and third-stage magnetic separation. The process has the following characteristics that: 30% of tailings are discarded by adopting the pre-beneficiation method, thus improving the beneficiation feed grade of the ores to 16-18%, reducing the quantity of the ores entering the ball mill by 30% and obviously lowering the ore beneficiation cost; and the energy is saved and the economic benefits are obvious.

Disclosed is a scheelite beneficiation method. The scheelite beneficiation method is characterized by sequentially including the following steps of scheelite rough concentration, scheelite rough concentrate normal temperature pretreatment and scheelite pretreatment concentrate heating concentration. As for scheelite rough concentration, according to scheelite ore feeding, one time of rough concentration, two to three times of fine concentrations and two to three times of scavenging are performed to obtain scheelite rough concentrate and scheelite rougher tailings; as for scheelite rough concentrate normal temperature pretreatment, according to scheelite rough concentrate, one time of rough concentration, two to three times of fine concentrations and two to three times of scavenging are performed to obtain scheelite pretreated concentrate and shceelite preheated tailings; as for scheelite pretreatment concentrate heating concentration, scheelite pretreated concentrate is concentrated to 60%-70% in concentration; heating is performed to reach 80 DEG C to 95 DEG C, and according to scheelite pretreated concentrate, one time of rough concentration, two to three times of fine concentrations and two to three times of scavenging are performed to obtain scheelite concentrate and scheelite heated tailings. According to the scheelite beneficiation method, concentrated and heated ore quantities can be reduced, good indicators in beneficiation of scheelite concentrate can be achieved, and the scheelite beneficiation method is applicable to flotation of scheelite in which the WO3 content is 0.06%-0.85%, the CaCO3 content is larger than or equal to 10% and CaF2 content is larger than or equal to 5%.

The invention provides a fluorite lean ore color sorting upgrading-tailing pre-sorting method. The method comprises the following steps that (1) fluorite lean ore is crushed through two sections of closed circuits, and crushed products are -15 mm; (2) the crushed products are screened to obtain oversize products and undersize products, wherein the size of sieve pores is 5 mm, and the oversize products enter a first section color sorter for fluorite upgrading and sorting to obtain lump ore concentrates; (3) tailings sorted through the first section of color sorter enter into a second-section color sorter for tailing discarding sorting to obtain lump ore tailings and lump ore middlings; and (4) the undersize products in the step (2) and the lump ore middlings in the step (3) are mixed and ground, and then flotation is conducted. According to the method, the raw ore amount entering a ball mill is greatly reduced by pre-upgrading and sorting and pre-tailings-discarding of a large quantityof hard minerals, so that the beneficiation feed grade is improved, over-crushing of the hard minerals to the fluorite in the ore grinding process is reduced, so that the production cost is reduced, and the sorting quality is improved.

The invention relates to a prescreening process added before floatation operation. The prescreening process is characterized in that the process comprises: adding the prescreening process during thickness classification operation before floatation; condensing floatation fed ore through a large condensation well; carrying out purification treatment of condensation overfall; feeding condensation underset into a sieve to carry out screen separation; feeding minus mesh into floatation operation to carry out floatation; taking plus sieve and floatation operation tailings as floatation tailings; and taking floatation operation ore concentrate as floatation ore concentrate. A vibration sieve (with the sieve mesh ranging from 0.1 to 0.2 mm) is installed before floatation feeding to carry out screen separation of floatation fed ore; minus mesh is fed into a floatation operation feeding box to carry out floatation, while plus sieve and floatation operation tailings are combined as operation tailings; moreover, material overflowed during thickness classification operation before floatation is turned into floatation operation feeding material through magnetic separation operation. The prescreening process can eliminate coarse granule during floatation operation, thereby increasing floatation milling grade and treatment capacity of floatation operation and reducing the consumption of floatation reagent.

The invention relates to a beneficiation method of low-grade tungsten ore. A combined technology including crushing and screening, photoelectric sorting, fine screening, ore grinding and dual-temperature flotation is utilized. Qualified tungsten concentrate is obtained through three-stage tailings throwing, low-grade tungsten ore resources are utilized, tungsten can be efficiently recycled, the recovery rate of the tungsten ore W2O3 reaches 85% or above, the grading cost can also be reduced, and the comprehensive utilization rate of the resources is improved. The method has the advantages of being simple and feasible, high in operability and environmentally friendly and having important reference significance for utilization of other mineral low-grade ore, and is suitable for the mining and metallurgy industry to use.

The invention discloses a method for sorting low-grade titaniferous magnetite. The method includes the steps that an intermediately-crushed material is fed into dry-type magnetic separation operation,and dry-type magnetic separation tailings are discharged; dry-type magnetic concentrate is subjected to primary ore grinding, weak magnetic roughing and weak magnetic selection, and magnetite concentrate with the iron ore concentrate grade being larger than or equal to 60% is obtained; weak magnetic roughing and weak magnetic selection tailings are combined into ilmenite beneficiation ore; the ilmenite beneficiation ore is subjected to primary strong magnetic separation at first, obtained primary strong magnetic concentrate is fed into secondary ore grinding, secondary strong magnetic separation and weak magnetic separation deironing operations, secondary strong magnetic separation tailings are thrown out, and weak magnetic separation deironing products are discharged; and weak magnetic separation deironed tailings serve as titanium flotation ore, the one-roughing, four-selection and one-scavenging direct flotation process that middlings can return in sequence is adopted in titanium flotation, flotation scavenging tailings are thrown out, and titanium concentrate with the TiO2 grade being larger than or equal to 46% is obtained. The method for sorting the low-grade titaniferous magnetite has the advantages of being good in energy-saving effect, large in handling capacity, high in adaptability, high in comprehensive utilization rate, good in economic benefit and the like, and can be applied and popularized to similar mines.

The invention relates to the technical field of copper-tin ore beneficiation, in particular to a copper-tin ore separation process which is characterized by comprising the following separation steps: (1) dense medium separation: crushing raw ore of copper-tin ore, and sequentially removing light-specific-gravity minerals with the specific gravity lower than that of copper minerals and tin minerals in the ores; (2) copper recovery: carrying out copper flotation on the ore pulp subjected to ore grinding treatment to obtain copper concentrate and copper tailings; (3) tin recovery: regrinding the copper tailings, feeding the copper tailings into a table concentrator, and separating to obtain tin rough concentrate, tin middlings and tailings; and (4) tin rough concentrate desulfurization: carrying out desulfurization flotation on the obtained tin rough concentrate, and separating to obtain tin concentrate and sulfur concentrate. The method has the advantages that the selected grade is high, the concentrate index is ensured, the production cost is reduced, the economic benefit is improved and the like.

The invention discloses a power transmission line path selection method and system. The method comprises the following steps: acquiring preposition information of power transmission line design; initializing a power transmission line component according to the power transmission line preposition information; constructing a standardized database covering a component attribute value range accordingto the power transmission line preposition information; importing a topographic map, and marking power transmission line path constraint condition information on the topographic map; according to thepower transmission line component and the power transmission line path constraint condition information, carrying out path scheme preliminary design to obtain a plurality of alternative path design schemes; designing a scheme for each alternative path according to a standardized database, and counting the corresponding production cost; and sorting and outputting the alternative path design schemesaccording to the production cost from low to high.

The invention discloses an intelligent magnetic iron ore separating method and device. The method comprises the following steps that the lowest grade and the particle size range of to-be-separated magnetic iron ore are confirmed; the magnetic field intensity and position of a magnetic source capable of making the lowest-grade magnetic iron ore in the to-be-separated magnetic iron ore generate a detectable signal are determined; signal acquisition is conducted on the ore randomly selected from the to-be-separated magnetite ore to obtain signal acquisition data, and the signal acquisition data are preprocessed to obtain preprocessed data; dimension transformation is conducted on the preprocessed data to generate corresponding ore samples, and the ore samples are divided into a training set and a test set; the training set is trained, and a model is tested through the test set to judge whether the test result meets the current mineral separation standard or not; and if yes, the deep learning model is trained successfully, and the deep learning model and a data acquisition system are embedded into an automatic separation device to conduct magnetic iron ore separation. The selected grade of the to-be-separated magnetite ore is expanded, and the ore utilization rate is increased.

The invention relates to a method for refining valuable metal minerals in tailings. The method comprises the following operating steps: with an aqueous solution of sodium hexametaphosphate as a dispersant, dispersing the tailings, grading fine granules of the tailings according to the size of granularity, carrying out gravity separation on the graded tailings, and refining valuable metals obtained after gravity separation. According to the method disclosed by the invention, the tailings are processed by adopting simple process flows, the tailing resources are sufficiently utilized, multiple valuable metal minerals in the tailings are enriched, and thus the beneficiation feed grade of the flows is improved and relatively high concentrate grade and recycling rate can be obtained; meanwhile, the flow processing capability is also improved and the equipment load is alleviated. According to the method, fewer dispersant is used, the process flows are simple and easy to operate, the energy consumption is reduced, and thus the processing cost of the tailings is reduced and the economic benefit for site selection is increased.

The invention provides a tailing pre-discarding method for andalusite ore separation. The tailing pre-discarding method comprises the following steps: 1) andalusite crude ores are crushed until the particle sizes are not more than 20 mm; 2) the crushed raw materials are burned in a high-temperature furnace at the burning temperature of 700-900 DEG for 10-20 minutes, and then the crushed materials are cooled to room temperature in a cooling bed; and 3) the cooled materials are subjected to dry process selective ore grinding, ore grinding products are subjected to dry process grading so as to remove tailing discarding materials, and the residual materials enters into the sequent ore separation work to carry out separation and purification. According to the invention, some gangue minerals are removed by tailing discarding before separation, so that water resources are saved, the sequent separation efficiency is improved, and the ore separation cost is reduced.