21 results about "Tailings" patented technology

The invention discloses a benefication method for recovering specularite. The method comprises the processes of primary grinding, grading, primary low intensity magnetic separation, and tailings discarding by primary high intensity magnetic separation; rough concentrate pre-classification by the primary low intensity magnetic separation and the primary high intensity magnetic separation, secondary grinding, secondary low intensity magnetic separation to obtain concentrates, secondary high intensity magnetic separation to obtain concentrates; and selective flocculation desliming secondary conducted on high intensity magnetic separation tailings (middlings), and anionic reverse flotation. The method further comprises the step of arranging a cylindrical slag separating sieve before the primary high intensity magnetic separation. With the advantages that the iron concentrate grade and the iron recovery are high, the loss of granular iron minerals is low, the mineral process flow is short, concentrates and tailings can be obtained in advance and the energy consumption of the benefication is low, the invention can be used not only for selecting specularite ores, but also for selecting weakly magnetic iron minerals, such as hematite, goethite, siderite, limonite, and the like.

The invention provides an asphalt modified thermoplastic polyolefin water-proof coiled material and a preparation method thereof; the coiled material is characterized by consisting of an upper surface layer, a main body layer and a reinforcing layer; the upper surface layer is made from white or colored thermoplastic polyolefin with excellent ultraviolet radiation resistance, the main body layer is made from black asphalt modified thermoplastic polyolefin, and the reinforcing layer consists of a middle reinforcing layer and a surface lining layer which are arranged as required. The asphalt modified thermoplastic polyolefin water-proof coiled material has the advantages of good processing property, excellent mechanical property, high tension strength, good dimensional stability, strong puncture resistance, good ultraviolet radiation resistance, small specific gravity, capacity of realizing convenient seam suturing welding of the main body and recoverable tailing and excessive materials, and the like.

The invention provides a slow-release compound fertilizer, which is a spherical or near-spherical granular compound fertilizer having a layered structure, wherein the innermost layer is a nitrogenous fertilizer layer; the intermediate layer is a potassic fertilizer layer; the outer layer is a mineral layer containing phosphorus; proportions of nitrogen, phosphorus and potassium are determined according to thicknesses of the fertilizer layers. The invention further provides a production method of the slow-release compound fertilizer. Tailing pulp is generated after heavy metals, manganese and iron are recycled from leached residues of production enterprises for electrolyzing manganese metal and manganese dioxide. The production method comprises the following steps of: adding flocculating agent, the weight of which is 0.01-0.02% of that of tailing mud, into the obtained tailing pulp, carrying out filter pressing by using a belt filter press, wherein the moisture content of filtered mud is 40-50%; and then, adding phosphatic fertilizer into the filtered mud, uniformly mixing, and carrying out calendering forming three times and roller-crushing calendaring granulating once by adopting a fertilizer granulator and drying to obtain the slow-release compound fertilizer.

The invention discloses a method and system for treatment of kiln slag including lead and zinc. The method includes the steps that (1) the kiln slag including lead and zinc is dried, so that a kiln slag dried material is obtained; (2) the kiln slag dried material, pulverized coal and binder are mixed, so that a mixed material is obtained; (3) the mixed material is subjected to pelletizing treatment, so that mixed pellets are obtained; (4) the mixed pellets are fed to a feeding zone of a rotary hearth furnace, the mixed pellets are reduced through a preheating zone and a high-temperature zone of the rotary hearth furnace in sequence, smoke dust containing silver, zinc oxide and lead oxide is exhausted from the preheating zone, and the obtained metallized pellets are discharged from a discharging zone; and (5) the metallized pellets are subjected to ore grinding magnetic separation treatment, and metal iron powder and tailings are obtained. By the adoption of the method, carbon, iron, lead, zinc and silver in the lead and zinc kiln slag can be recycled comprehensively; and moreover, the recovery rate of the iron can reach 80%, the volatilization rate of the zinc can reach 96%, the volatilization rate of the lead can reach 95%, and the volatilization rate of the silver can reach 90%.

The invention provides a mineral separation and enrichment method for a primary scandium ore. The method comprises the steps of crushing, ore grinding, low-intensity magnetic separation, high-intensity magnetic roughing and scavenging, concentrate regrinding, high-intensity magnetic concentration and the like. A scandium concentrate obtained by using the method disclosed by the invention is subjected to wet-metallurgy scandium extraction, so that the scandium ore resource becomes a developable and utilizable resource, the production efficiency of wet-process scandium extraction can be effectively increased, the consumption of various auxiliary materials such as acid and alkaline required by wet-process scandium extraction and the production cost can be remarkably reduced, and environment pollution caused by a wet-process scandium extraction process is reduced. Meanwhile, the produced tailings can be recycled in the industries such as building materials, the chemical industry, ceramics and glass, so that the comprehensive recycling value of the resource is increased, and the ecological and environment protection influences caused by tailing accumulation and storage are reduced.

The invention relates to a gravity separation-flotation combined beneficiation process for phosphate ores. The gravity separation-flotation combined beneficiation process for phosphate ores comprisesthe following steps: feeding phosphate ore pulp into a three-segment spiral chute gravity separation process to obtain reselected concentrate and reselected tailings; feeding the reselected concentrate into a desilicication reverse flotation process to obtain desilicicated concentrate and desilicicated tailings; feeding the desilicicated concentrate into a magnesium removal reverse flotation process to obtain double reverse concentrate and magnesium removal tailings; feeding the reselected tailings into a thickener to be concentrated to obtain a thick bottom flow; feeding the thick bottom flowinto a direct flotation process to obtain direct flotation concentrate and direct flotation tailings; feeding the direct flotation concentrate into a reverse flotation process to obtain direct and reverse concentrate and reverse flotation tailings; combining the desilicicated tailings, the direct flotation tailings and the reverse flotation tailings to obtain final phosphate tailings; and combining the double reverse concentrate with the direct and reverse concentrate to obtain the final phosphate concentrate. The process has the advantages that the desilicication reverse flotation is free ofslurry interference, the silicate removal efficiency is high, direct flotation is free of coarse grain level interference, the consumption of a reagent is low, the yield of a foamed product floatingin the beneficiation process is low, and a flowage structure is good in stability and high in controllability.

The invention discloses high-volume industrial solid waste composite Portland cement and a preparation method thereof. The high-volume industrial solid waste composite Portland cement is prepared fromthe following raw materials in parts by weight: 85-115 parts of cement clinker, 5-6 parts of modified desulfurized fly ash and 0.05-0.1 part of a grinding aid, wherein the cement clinker is preparedfrom the following raw materials in parts by weight: 95-95.9 parts of a fired cement raw material and 4.1-5 parts of coal ash; the cement raw material is prepared from the following raw materials in parts by weight: 42.5-45 parts of carbide slag, 15-17 parts of iron tailings, 5-6 parts of fly ash, 35-40 parts of limestone and 2 parts of iron ore powder. According to the invention, industrial solidwastes such as carbide slag, iron tailings, desulfurized fly ash and the like are fully utilized, so that the preparation of the high-volume industrial solid waste composite Portland cement is realized, the problems that the industrial solid wastes such as carbide slag, iron tailings, desulfurized fly ash and the like occupy a large amount of land resources and cause serious environmental pollution are solved, and the utilization rate of the industrial solid wastes is improved.

The invention discloses a preparation method of a pyrite tailing ceramsite proppant. Pyrite tailings are subjected to calcination pretreatment and petroleum drilling effluent steeping, the composition and content of raw materials from which ceramsite is prepared are optimized, the physical and chemical performance of the ceramsite is adjusted, and then the pyrite tailing ceramsite proppant with high pressure resistance and low density is prepared.

The invention relates to an oxidative degradation method for cyanide in cyaniding tailings. The oxidative degradation method comprises the steps that the mass percentage of the water content of the cyaniding tailings obtained after filter pressing is controlled to be 20-30%, stirring is conducted, and three or more of cement, aluminum powder, sulphur powder, sodium perborate and sodium chloride are added, wherein the amount of added chemicals accounts for 2.2-7.7% of the dry weight mass percent of the cyaniding tailings; a trolley is loaded with the materials and then put into a high-pressurereaction still, and after vacuum extraction is conducted on the materials in the high-pressure reaction still, steam is introduced; and after the temperature is raised to 180-200 DEG C, the pressure is maintained for 4.5-10 hours, depressurization is conducted so that the ammonia-containing steam is exhausted, and the residual cyaniding tailings in the high-pressure reaction still can be convertedinto another type of ordinary solid waste through hazardous waste toxicity identification. The degradation method is good in cyanogen removal effect; cyanogen removal is irrelevant with the initial concentration of cyanogen and is relevant with the time and temperature; the cyaniding tailings obtained after treatment can meet the environment protection requirement and be directly reused as a secondary resource; and by means of hazardous waste toxicity leaching identification, the PH value is 7-9, and the density of the total cyanide is 2 mg/L.

The invention discloses a method for extracting iron from iron tailing, comprising following steps: (1) adding water into iron tailing to be mixed into ore pulp; (2) ultra-fine processing said ore pulp; (3) adding organic acid or its salt into ore pulp after step (2) for magnetic selection in the magnetic separator. The invention is a new clean producing ore selection process with lower cost and high extraction rate while extracted iron has high grade. Therefore, the invention has higher technique and economic value, which can improve the ore selection level, economic benefit, release the lack of iron rich ore, to reduce the power consumption of steel manufacture and generate large benefit to corporation.

A method for concentrating platinum and palladium from platinum-palladium flotation concentrates is composed of the following steps of adding sulfur of which the mass accounts for 0.2%-10% of the platinum-palladium flotation concentrates according to the mass ratio (1:3-9) of the platinum-palladium flotation concentrate to sulfuric acid solutions with the concentration of 150-250 g/L; leaching for1-5h under the oxygen partial pressure of 0.5-1.0 MPa, at the leaching temperature of 120-160 DEG C, pH of less than 0.5, and the stirring speed of 400-600 r/min; after leaching, maintaining the original stirring speed, cooling to 108-114 DEG C at the rate of 0.2-0.5 DEG C/min, and holding for 1-3h; continuously cooling to room temperature at the rate of 0.4-1.0 DEG C/min and the stirring speed of 150-300 r/min; and filtering to obtain leachate and leaching residues, and screening the leaching residues with a 100-mesh screen to obtain platinum-palladium concentrates and tailings. The method is simple in operation, and the purposes of concentrating precious metal including platinum and palladium as well as three-phase separation of base metal including copper, nickel, zinc, iron and silicate tailings are achieved synchronously; and the content and enrichment ratio of the precious metal in the platinum-palladium concentrates are high, and the subsequent separation cost is reduced obviously.

The invention discloses a preparation method of a multi-function zeolite-tailing water absorbing and storing nutrient bag for desert. The main point of the technical scheme is that the multi-functionzeolite-tailing water absorbing and storing nutrient bag for desert is a cylindrical cloth bag made of geotextile, the upper part of the cylindrical cloth bag is open and is used for adding a multi-function zeolite-tailing water absorbing and storing nutrient conditioner for desert, and the bottom of cylindrical cloth bag is a closed round bottom. After the water absorbing and storing nutrient conditioner in the multi-function zeolite-tailing water absorbing and storing nutrient bag for desert absorbs water and is expanded, sealing packaging is carried out for obtaining the finished product ofthe multi-function zeolite-tailing water absorbing and storing nutrient bag for desert. The multi-function zeolite-tailing water absorbing and storing nutrient bag for desert is suitable for variousgreening plants in a desert, and can timely provide water and nutrition required in the plant growth process, so that the survival rate of the planted various greening plants is improved, normal growth and development in the desert is ensured, the large-area afforestation rate in the desert is accelerated, the ecological environment of desertification land is improved, and the spread of desertification is prevented.

The invention relates to application of cold clay and a method using the cold clay to manufacture artistic furniture and craft tools. The application of cold clay is characterized in that the cold clay is seamlessly embedded with various logs rich in texture through casting under normal temperature and normal pressure, and stone-simulating and ceramic-simulating effects are achieved. The cold clay is used to manufacture the artistic furniture. The application of the cold clay and the method using the cold clay to manufacture the artistic furniture and craft tools have the advantages that the creative cold clay can sufficiently utilize natural raw materials such as industrial and mineral industry tailings, stone processing industry tailings and potting wastes so as to achieve minimum resource and energy consumption; meanwhile, various inorganic modifying materials are added according to certain proportion, and low-temperature die pressing, material condensation reaction, special dies and delicate polishing are used to form the high-strength, ecological and environment-friendly furniture shaping and casting material which has natural texture and is widely applicable to the manufacturing of the artistic furniture and craft decorations.

The invention discloses an efficient tailing sorting machine, and belongs to the technical field of tailing sorting. The efficient tailing sorting machine comprises a machine frame, a sorting device and a material receiving device. The sorting device comprises a feeding pipe, a material distributing tube, sorting taper tubes, a flow guide barrel and high-pressure flushing pipes. The material distributing tube is a vertically-installed round tube, and the top of the material distributing tube is connected with the feeding pipe. The multiple layers of the sorting taper tubes are evenly distributed on the outer wall of the material distributing tube concentrically and vertically. Material passing holes are circumferentially and evenly distributed in the tube wall of the material distributingtube and further located in the upper side of the taper top of each layer of the sorting taper tube. A blind plate is installed inside the lower section of the material distributing tube. The high-pressure flushing pipes are arranged above the sorting taper tubes. According to the efficient tailing sorting machine, a sorting technology for conducting waste recycling on tailings is provided according to a large quantity of discarded tailings produced in the mineral aggregate treatment process, the advantages of being high in treatment efficiency, good in sorting effect, small in floor area andthe like are achieved, the grade of valuable metal in the tailings can be further increased, favorable conditions are created for recycling the tailings, and the economic benefits and social benefitsare obvious.

The invention relates to the technical field of mineral separation, in particular to a comprehensive utilization method of pegmatite containing tantalum, niobium, cassiterite, feldspar and spodumene. The comprehensive utilization method of the pegmatite comprises the following steps: crushing and grinding raw ore, and then carrying out flotation, magnetic separation, reselection, concentration, dehydration, precipitation and clarification combined mineral separation process, so that valuable mineral resources such as mica, tantalum-niobium ore, cassiterite, feldspar, spodumene, building material sand and the like contained in the pegmatite can be recycled; the method has the advantages that the method is simple in process, high-quality recovery of spodumene concentrate and feldspar concentrate products and the like can be achieved, the comprehensive recovery utilization rate is high, nearly zero emission of tailings and tail water can be achieved, the method is suitable for large-scale production and application, and stable beneficiation indexes can be kept.

The invention discloses matte glaze prepared from gold ore tailing powder and processing equipment of the matte glaze. A processing method comprises the following steps: step 1, filtering and sortingore pulp by adopting gold ore tailing preparation equipment, and carrying out rapid separation of the ore pulp in a gold washing chute; step 2, filtering and cleaning the ore pulp obtained in the step1 multiple times to obtain a uniformly-mixed mixture; step 3, introducing the obtained uniformly-mixed mixture into a drying furnace through a feeding machine and a discharging pipe, and carrying outdrying; etc. According to the matte glaze prepared from the gold ore tailing powder and processing equipment of the matte glaze in the invention, the gold washing chute is used for realizing the effect of separating ore pulp; and meanwhile, a slurry pushing device is arranged on the gold washing chute, so the effect of automatic pushing and separating is achieved when deposited slurry on the goldwashing chute is cleaned, and thus, manpower is effectively saved, potential safety hazards are reduced, working efficiency is further improved, and the preparation efficiency of the matte glaze is improved.