1065 results about "Gravity separation" patented technology

A system of reciprocating bottom hole sucker rod pumps, situated in an oil well, to produce an oil rich stream to surface and inject a water stream to a same wellbore disposal zone. Two pumps vertically in tandem are actuated by a single sucker rod string. Separate intakes for each pump are situated so as to allow for gravity to segregate oil and water in the wellbore before reaching the intakes. Both streams are produced out of the pumps on the upstroke. Injection of the water stream is facilitated by an outer housing around the bottom pump to redirect flow to a disposal zone.

The invention provides an efficient separation method for low-grade and complex iron ores. The method is characterized in that the complex iron ores of different grades and species are classified, so as to obtain lump ores and mineral powder which are balled, dried and preheated; reduction roasting, cooling, ball milling, magnetic separation, ball milling and magnetic separation or reverse flotation are performed in turn, so as to obtain iron ore concentrate or reduced iron powder; classification treatment is to crush and screen the iron ores with iron-containing grade between 50 and 56 percent and then dry and preheat obtained ores; fine-grained mineral powder is ground, washed, ground, deslimed and separated so as to obtain the iron ore concentrate and slime containing 58 to 60 percent of iron; the slime which is washed, deslimed, and separated is dewatered and dried and is added to and well mixed additives, so as to be balled then; the iron ores with the iron-containing grade between 40 and 50 percent are crushed and screened so as to obtain the lump ores which are directly dried and preheated, while the fine-grained mineral powder is obtained through dry-type grinding and then is added to and well mixed the additives so as to be balled then; and the iron ores with the iron-containing grade between 25 and 40 percent are crushed and screened so as to obtain the lump ores which are dried and preheated, while the fine-grained mineral powder is subjected to grinding, gravity separation or high-gradient magnetic separation and reverse flotation, so as to obtain coarse iron concentrate powder which is added to and well mixed with the additives and then is balled.

The invention discloses a process for treating mixed-type iron ore. The process comprises the following steps: raw ore is crushed and then subjected to primary grinding and primary grading which form closed circuit grinding; after primary overflow is subjected to crudeness / fineness grading and coarse grains are sorted through a gravity separation device, spiral chute concentrate is fed into a fine screen with large mesh size, and undersize products are coarse-grain concentrate; after gravity separation tailings are subjected to tailings discarding through intermediate-magnetism sweeping, intermediate-magnetism sweeping concentrate, gravity separation middlings and oversize products are merged into coarse-grain middlings; the middlings are fed into an open-circuit grinding system consisting of secondary grading and secondary grinding and reground, and then return to crudeness / fineness grading; fine grains after crudeness / fineness grading are sorted through a magnetic separation device; magnetic separation concentrate is fed into the fine screen with small mesh size, and the undersize products are fine-grain concentrate, while the oversize products are fine-grain middlings which are directly fed into two-stage grinding so as to be reground; fine-grain concentrate and the coarse-grain concentrate are merged into final concentrate; and intermediate-magnetism sweeping tailings and the magnetic separation tailings are merged into final tailings. The process has the advantages of good flow stability, easy operation and capability of effectively recovering the mixed-type ore and fully utilizing mixed-type ore resources.

The invention relates to a method for separating fine cassiterite, which is characterized by comprising the following steps of: grinding a raw ore, performing size mixing, and performing flotation on a sulfide ore; performing magnetic separation on tailings of the sulfide ore subjected to flotation, and grading the tailings subjected to magnetic separation into particles of +0.043mm and particlesof -0.043mm; performing gravity separation on the particles of +0.043mm by using a spiral chute and a shaker to obtain a shaker cassiterite concentrate; desliming the particles of -0.043mm by using acyclone to obtain cyclone settled sand; performing size mixing, primary flotation roughing, primary flotation scavenging and primary flotation cleaning on the cyclone settled sand to obtain a flotation coarse concentrate; performing gravity separation on the flotation coarse concentrate by using a centrifugal ore separator to obtain a centrifugal gravity separation cassiterite concentrate; and mixing the shaker cassiterite concentrate and the centrifugal gravity separation cassiterite concentrate to obtain a total cassiterite concentrate. Roughing is performed by the spiral chute, so that theprocessing capacity in a unit area is greatly improved, the occupied area is saved, and separation efficiency is high; and flotation roughing and gravity separation cleaning are combined, so that theconsumption of a flotation agent is low, cost is low, the ore separation enrichment ratio is 5 to 10, and the recovery rate of the cassiterite is high.

The invention relates to a plastic-bottle recovery processing system, belonging to the waste recovery system. The invention comprises: an open-washing unit; a PVC label-removing unit connected with open-washing unit; a crush unit connected to the PVC label-removing unit; and a water-medium gravitational separation unit connected to the crush unit. The invention has simple structure, easy operation, lower labor, automation recovery, and better benefits.

The invention relates to a comprehensive recovery process for lithium-containing polymetallic ores with associated fine-grained niobium-tantalum. The process comprises the steps of raw ore crude grinding, settlement for desliming, flotation, agglomeration and magnetic separation, gravity separation and the like. The process provided by the invention is particularly applicable to the comprehensive recovery of lithium-containing polymetallic ores which contain a great amount of slime, are located in mining areas at low temperature all through the year, are low in grade of associated niobium-tantalum minerals and are fine in disseminated grain size, the process is advanced, reliable, simple, reasonable and highly targeted, the requirement on raw ore grinding fineness is not high, the regrinding amount is small, the operation cost is low, the comprehensive recovery rate is higher and the industrialization prospect is good.

A liquid purification and separation apparatus for separation of pollutants in stormwater runoff is disclosed. This apparatus utilizes gravitational separation and tortuosity, resulting from a plurality of baffles both perpendicular to and oblique to the primary water flow direction, to trap substances less-dense and more-dense than water. The apparatus features improved resistance to pollutant remobilization through treatment of water volume rather than flow rates, using vertically stacked water columns of varying depths to settle small particles. An overflow structure diverts excessive liquid without interfering with purification and separation, and can be placed integrally within or external to the apparatus receptacle.

The invention relates to a technique for roasting and dressing laterite nickel ore. The technique comprises the following steps that: raw ore is crushed, sieved and then roasted for the first time by use of a kiln; cold roasted sand powder is ground into fine powder; the fine powder is mixed well with carbonaceous additives and chlorinating agents and then pelletized to be pellets in a disk pelletizer; the pellets are dried by use of afterheat flue gas of the kiln and then enter a second kiln so as to be roasted; neutral or weak reducing atmosphere is adopted in the roasting process to inhibit the reduction of iron in laterite ore; roasting temperature is controlled below soft melting temperature; the roasted pellets are quenched with water under an airtight condition; water-quenched roasted sand is ground and then dressed so as to obtain nickel-cobalt concentrate; iron in tailings is recovered through high intensity magnetic separation and gravity separation; tail gas of a pellet-roasting kiln is subjected to vortex dust collection, neutralized with lime mortar and concentrated and then passes through a washing tower; and most of chlorinating agents are recovered after water-film dust removal. The technique is characterized by strong raw-material adaptability, simple process flow, low cost, environment-friendly property and the like.

The invention discloses a method for separating and recycling the materials of each component in a waste printed circuit board (PCB), and is characterized by subjecting the waste PCB to vacuum pyrolysis, shear breakage, screening classification, gravity separation and medium-temperature calcination, so that all materials of components in the waste PCB can be separated and recycled to obtain organic pyrolytic oil, metal mixtures and glass fiber; wherein, the recycled organic pyrolytic oil can be used as fuel oil or chemical materials, the recycled metal mixtures can be used as metallurgical materials, and the recycled glass fiber can be used as glass fiber processing materials or fillers, thereby achieving the purpose of recycling all resources. The method of the invention can effectively separate and recycle all materials of components in the waste PCB, and has the characteristics that the technological method is simple, feasible, efficient and pollution-free. Therefore, the invention is of great social, economic and environmental benefits.

The invention relates to a method used for separating minerals from weak magnetic iron tails, which is divided into six stages: primary sorting of strong magnetic minerals, separation of strong magnetic minerals, separation of weak magnetic minerals, separation of non-magnetic minerals, treatment of ore pulp water during the ore dressing process and treatment of finish tail sand. According to the magnetic susceptibility differences, specific gravitydifferences and floating differeces between minerals, magnetite, vanadium titano-magnetite, mixed ore of apatite and xenotime and hematite feldspar concentrate can be separated from the weak magnetic iron by using techniques of crude separation with a strong magnetic separator, refine separation with a weak magnetic separator, gravity separation, floatation, electric separation, etc. The method has advantages of standard production technique, low cost for industrialized production, great variety of separated minerals, stable quality and high separating efficiency, thereby having significant social and economic benefits.

The invention relates to an iron powder production method by using a tunnel kiln to reduce concentrate pellets containing carbon vanadium ferrotitanium with titanium slag and vanadium pentoxide as combined products. Concentrate pellets are made from vanadium-titanium iron concentrate through crashing and damp milling. The iron powder and tailings are obtained by putting the concentrate pellets into the tunnel kiln to be reduced, crashing, wet-grinding, magnetic separation and gravity separation. The tailings are soaked with titania waste acid to eliminate remnants magnesium and iron. Then the tailings are filtrated and dried to obtain a new material. And then the new material is added with sodium salt to do salt roast and then to be soaked by water, then titanium slag and sodium vanadate are obtained respectively after the water soaking. At last, the vanadium pentoxide is obtained by ammonium vanadate precipitating and calcination deaminase to the sodium vanadate liquid. The invention eliminates the disadvantage of high energy consumption by electric furnace smelting and bad separating effect of vanadium and titanium, difficult control of vanadium and titanium trend and low yield rate of extracting vanadium and titanium through converter blowing iron molten, etc. The invention has the advantages of high yield rate of vanadium, titanium and iron and high resources utilization rate and explores a novel practical way for comprehensive utilization of vanadium, titanium and iron concentrate ore.

The invention discloses a sorting and separation process for utilizing slag comprehensively. The process comprises the following steps of: crushing pretreated original slag in a wet method, performing magnetic separation to select crushed iron granules, and performing gravity separation on slag charge, so that light products, heavy products and intermediate fine materials are separated out by taking water as a separating medium; and purifying metal subjected to the gravity separation by an ore dressing table concentrator, and sorting the metal. In the process, four kinds of products are sorted by combining crushing equipment and gravity separation equipment under the hydraulic action, and also cay be recycled, wherein like natural gravels, the sorted intermediate fine material sand is a high-quality material for producing high-quality building materials; and in the key point of the process, metal substances in the slag are sorted and separated, so the problems of secondary pollution (including the radiation pollution of heavy metal) during application and the like are solved.

Various systems and methods are described that can be used as part of a process to separate bitumen from oil sands. The process may include adding a hydrocarbon solvent to a bitumen containing extract. The tailings from this process may contain a significant amount of solvent. The solvent may be recovered from the tailings with a tailings solvent recovery unit that utilizes negative pressure to significantly reduce the cost of the process in comparison to a conventional steam stripping unit. In one embodiment, the tailings may also separated prior to entering the tailings solvent recovery unit with a gravity separation apparatus or a cyclonic separation apparatus, such as a hydrocyclone.

The invention relates to a method for recycling iron and aluminum by particle size grading pretreatment of Bayer process red mud, belonging to the technology for recycling red mud resources. The method comprises the following steps: firstly, Bayer process red mud is graded in terms of the particle size by using a physical method into coarse red mud and refined red mud; the coarse red mud is processed using physical mineral dressing processes, such as magnetic separation, gravity separation and the like, in order to obtain iron ore having high iron quality and coarse-grained sand, which are made use of respectively; the refined red mud is mixed with sodium carbonate, limestone and carbon power and is then subjected to reduction sintering, and two processes of magnetizing reduction roasting of iron and soda lime sintering of aluminum are implemented synchronously by means of the control of sintering conditions; sodium aluminate is dissolved out of clinker through dilute alkali solution, dissolved slag is subjected to magnetic separation to recover iron ore concentrate, and after being subjected to dealkalized cleaning, the residual calcium silicon slag is applied to building material industry. The method realizes combined recovery of iron, aluminum and other elements, magnificently achieves the comprehensive utilization of the Bayer process red mud, is capable of effectively relieving environment pollution resulting from the accumulation of the Bayer process red mud, and has excellent economic and social benefits.

The invention provides a method of preparing low iron-containing quartz sand for photovoltaic glass from pyrite type quartzite and a pickling purification apparatus. The method comprises following steps: washing collected pyrite-containing quartzite, crushing, and preparing sand by wet method; subjecting prepared sand slurry to magnetic separation and screening; collecting sand slurry of 24 to 120 meshes, subjecting the sand slurry to fine-washing, gravity separation, and magnetic separation, and removing water; transferring dewatered sand into the pickling purification apparatus, adding a mixed acid solution, and performing circulating pickling, wherein the mixed acid solution is heated to 75 to 90 DEG C, and circulating pickling is preformed for 3 to 4h at the temperature of 75 90 DEG C; and removing the mixed acid solution, washing the sand with clear water until the pH value is 7, and then dewatering so as to obtain low iron-containing quartz sand. The method is advanced in technology; the apparatus is scientific and reasonable in design; operation is convenient; automation degree is high; production amount is large; product quality is stable; production cost is low; large-scaled production of low iron-containing quartz sand is realized; economic benefits and social benefits of enterprises are increased by scientific and reasonable development and application of pyrite-containing quartzite.

The invention relates to a purifying and processing method of attapulgite clay minerals, which belongs to the technical field of the wet separating technique of minerals. The specific steps comprise utilizing spiral classifier for primary purification, utilizing cyclone classifier for secondary purification, employing gravity separation equipment for three-stage purification, concentration, drying and disintegration, thereby preparing ultrafine powders of the purified attapulgite clay minerals with the average particle size of 0.93-2.0 micron, and particle size of the largest particle is 3.5-5.0 micron. The method employs spiral classifier to remove the partly impure minerals with bigger particles in raw ores in advance, reinforcing the dispersion effect and the difference of suspension property of the attapulgites and impure minerals by means of surfactants, increasing separation factor, utilizing gravity separation equipment to separate the impure minerals and the attapulgite clay minerals efficiently, thereby overcoming the shortcomings that the prior art is difficult to achieve industrial production and obtain qualified purification products.

The invention belongs to the field of metallurgy, and in particular relates to a method for separating titanium, iron, vanadium and calcium from mixed titaniferous slag. The method comprises the following steps of: sufficiently mixing blast furnace liquid molten titaniferous blast furnace slag and converter vanadium-containing steel slag flowing out from slag discharge holes, so as to form mixed molten slag, blowing an oxidization gas into a mixed molten body, after the gas blowing is accomplished, naturally cooling down the molten slag, manually taking out the vanadium-containing metal iron which is settled to the bottom of the molten slag, further separating the rest vanadium-containing metal iron in a magnetic separation mode, and finally separating titaniferous ingredients in the molten slag from gangue phase by using a gravity separation method so as to obtain titanium concentrate and tailings the main phases which are perovskite phases, wherein the mass percentage of TiO2 in the titanium concentrate is 35-50%. According to the method, the physical thermal resource of the molten slag is sufficiently utilized, the efficiency is high, the energy is saved, and meanwhile the titanium ingredient, the iron ingredient, the vanadium ingredient and the free calcium oxide ingredient in the mixed molten slag are recycled, so that the purpose of comprehensive high-efficiency recycling on secondary resource is achieved.

The invention discloses a magnetic-gravity combined ore dressing technology for hematite, comprising the following steps of: carrying out dry magnetic separation and jigging gravity separation to obtain blast furnace lump ore, throwing the tailings of the lump ore, carrying out first-stage ore grinding, weak magnetic separation, strong magnetic separation and centrifugal gravity separation on middlings, and carrying out second-stage ore grinding, weak magnetic separation, strong magnetic separation and centrifugal gravity separation. According to the technology, part of qualified blast furnace lump ore (the iron grade is large than 54%) can be obtained in advance, the massive tailings (the iron grade is less than 12%) can be thrown out, the quantity of the ball-milled ore (the middlings) can be greatly reduced, and the grinding and separation energy consumption can be greatly reduced. The massive tailings which are thrown out can replace the macadam and the stone to be taken as the building material, so that the comprehensive utilization of the bulk quantity of the tailings resource can be realized, and the technology is prominent in emission reduction effect; and the whole ore dressing technology is the magnetic-gravity combined ore dressing technological process, so that the flotation reagents can not be consumed, the technology is very friendly to the work environment and the neighboring environment, the environment can be protected, the pollution of the beneficiation reagent to the environment caused by the flotation work can be avoided, and the technology is particularly suitable for the ore dressing of the medium and high-grade (the iron grade is more than or equal to 38%) hematite.

Apparatus in fluid communication with a water leg portion of a hydrocarbon-contaminated water, e.g., a water leg portion of a produced water stream or an offshore drilling or production platform sump tank for conveying water, separated from oil, into contact with non-woven fiber / particulate polymer coalescing media-containing canisters such that the hydrocarbon droplets and other organic material droplets commingled with the sump tank or produced water will be coalesced by passage through the coalescing media. The canisters preferably are provided in a plurality of stacks in each vessel. Solids that do not pass through the canisters are accumulated at the bottom of the vessel and easily drained through a drain port. The water and hydrocarbons will pass through the coalescing media within the canisters and will be separated easily from each vessel, e.g., by gravity separation, sot that the water can be conveyed back to the ocean water without contamination.

A liquid purification and separation apparatus for separation of pollutants in stormwater runoff is disclosed. This apparatus utilizes gravitational separation and tortuosity, resulting from a plurality of baffles both perpendicular to and oblique to the primary water flow direction, to trap substances less-dense and more-dense than water. The apparatus features improved resistance to pollutant remobilization through treatment of water volume rather than flow rates, using vertically stacked water columns of varying depths to settle small particles. An overflow structure diverts excessive liquid without interfering with purification and separation, and can be placed integrally within or external to the apparatus receptacle.

Small amorphous silica particles are used to provide a relatively large surface area upon which silica will preferentially adsorb, thereby preventing or substantially reducing scaling caused by deposition of silica on evaporative cooling tower components, especially heat exchange surfaces. The silica spheres are contacted by the cooling tower water in a sidestream reactor, then separated using gravity separation, microfiltration, vacuum filtration, or other suitable separation technology. Cooling tower modifications for implementing the invention process have been designed.

The invention relates to a benefication method for bastnaesite. The benefication method for the bastnaesite is characterized by comprising the following steps: grinding and classifying the raw ore; performing magnetic separation to obtain magnetic concentrates and tailings; performing gravity separation on each grade of strong magnetic concentrate by using a table concentrator respectively to obtain table concentrates, table middlings and table tailings; combining each grade of table concentrate and table middling and performing high-gradient magnetic separation to obtain magnetic bastnaesite concentrates and magnetic middlings; combining the magnetic middlings and the table tailings; grinding the ores; performing closed-circuit flotation comprising one-time rough concentration, three-time scavenging and three-time concentration; and returning the middlings sequentially to obtain flotation bastnaesite concentrates and flotation tailings. The magnetic bastnaesite concentrates and the flotation bastnaesite concentrates are rare-earth total concentrates; the rare earth oxide (REO) grade of the rare earth is more than 65 percent; and the total recovery rate reaches 75 to 86 percent. According to the benefication method for the bastnaesite, fully-wet non-dust operation is adopted; separation efficiency is high; occupied area is small; production is performed continuously; flotation is performed at normal temperature; and environmental pollution is avoided. The benefication method for the bastnaesite is applicable to benefication of light rare earth minerals existing in the form of the bastnaesite.

A compact, low footprint water separation system for use in subsea well operations. A subsea production tree has a vertical passage and at least one laterally extending branch. A subsea gravity separation device having a hollow toroidal body detachably is mounted around and connected to the production tree. An inlet on a first side portion of the separation device is connected to the at least one laterally extending branch of the production tree and admits production fluid. The production fluid flows through the separation device where it passes through a separation unit. After passing through a separation unit, less dense fluid is discharged through an upper outlet and more dense fluid is discharged through a lower outlet. The upper and lower outlets are positioned opposite the first side portion of the separation device.

A liquid purification and separation apparatus for separation of pollutants in stormwater runoff is disclosed. This apparatus utilizes gravitational separation and tortuosity, resulting from a plurality of baffles both perpendicular to and oblique to the primary water flow direction, to trap substances less-dense and more-dense than water. The apparatus features improved resistance to pollutant remobilization through treatment of water volume rather than flow rates, using vertically stacked water columns of varying depths to settle small particles. An overflow structure diverts excessive liquid without interfering with purification and separation, and can be placed integrally within or external to the apparatus receptacle.

The invention discloses a method for recovering fine mud cassiterite. The method comprises the following steps of dispersing a fine mud cassiterite mineral in an agitator by using sodium hexametaphosphate as a dispersing agent, grading the fine mud cassiterite mineral by using a high frequency fine screen, recovering the graded fine mud cassiterite mineral through gravity separation by using a fine mud cassiterite table concentrator to obtain fine mud rough concentrates in different particle sizes, and combining the fine mud rough concentrates in different particle sizes and performing floatation recovery on the fine mud cassiterite to obtain a cassiterite concentrate. By the method, the fine mud cassiterite can be effectively recovered, and the fine mud cassiterite concentrate of which the cassiterite grade is 45.87-46.21 percent and the recovery rate is 52.51-56.75 percent can be obtained under the condition that the fed mineral has the cassiterite grade of 0.37-0.45 percent.

The invention relates to a combined mineral processing technology of low-grade laterite type weathering titanium placers and belongs to the technical field of mineral processing. The combined mineral processing technology includes subjecting raw materials with the titanium dioxide content of below 5% to low-intensity magnetic-high-intensity magnetic pre-treatment technologies, then gravity separation-regrinding-gravity separation, gravity separation-regrinding-flotation processing and regrinding-flotation processing. According to the combined mineral processing technology of the low-grade laterite type weathering titanium placers, by means of the low-intensity magnetic-high-intensity magnetic pre-treatment technologies, a large number of slurries which are rich in kaolin minerals can be cast, technological procedures can be simplified, obtained rough titanium concentrates have few slurries, and follow-up treatment can be easily performed, for example, the interference of the slurries is avoided when technologies such as flotation and tabling gravity separation are performed; the grade and the recovery rate of the obtained titanium concentrates are high, and high intensity magnetic separation is beneficial to recovery of fine-particle grade titanium particles; and by means of the technologies of gravity separation-regrinding-gravity separation, gravity separation-regrinding-flotation processing and regrinding-flotation processing, the recovery rate of titanium is high, simultaneously, the content of iron in mineral samples is increased, and additional values of products are improved.

Microcomposites comprising titanium dioxide (TiO2) nanoparticles embedded within cross-linked, thermally responsive microgels of poly(N-isopropylacrylamide) are disclosed. Interpenetrating linear chains of poly(acrylic acid) functionalize the nanoparticles for dispersal within the microgel framework. The microcomposites show rapid sedimentation, which is useful for gravity separation applications such as environmental remediation via photocatalytic degradation.The extent of loading of the TiO2 within the colloidal particles can be easily manipulated from 10% (weight) to a value as high as 75%. The microgel-titania composites showed rapid sedimentation, which is useful for gravity separation of these particles in photocatalytic applications. The settling of the microgel-titania composites occurred over minutes and was much faster than solid, impermeable spheres. As the content of TiO2 increased within the particles from 10% to 75%, the increased effective particle density led to significant decrease in the settling time from approximately 2200 seconds to approximately 100 seconds.

The invention discloses a comprehensive household garbage treatment process which comprises the following steps: crushing household garbage; screening, and respectively performing gravity separation and magnetic separation after screening, wherein combustible organic matters and light combustibles are separated in the gravity separation process, and soil and metals for greening are separated in the magnetic separation process; performing magnetic separation on materials subjected to gravity separation, wherein organic soil residues, inorganic matters and metals are separated in the magnetic separation process; performing a first treatment step on the organic soil residues; and performing a second treatment step on the combustible organic matters and light combustibles. The process is advanced, reasonable, high in degree of automation and high in treatment capacity, more recycled products with high quality are realized, treatment cost is low, aerobic fermentation treatment processes such as aging and curing and a relative odor concentration process are performed in a closed mode, the waste gas is treated in a centralized mode and is emitted on standard, the further environmental pollution in the household garbage treatment process is avoided, the household garbage is changed into valuable materials, and the recycled products with high market values are produced, so that household garbage harmlessness, reduction treatment and comprehensive resource utilization are realized.