165 results about "Nickel content" patented technology

The application discloses a method for improving the quality of high-nickel steel and belongs to the technical field of high-nickel steel continuous casting. The method comprises the following steps: continuously casting high-nickel steel liquid with a nickel content of not less than 3.5% in a continuous casting machine; controlling the temperature of a slab entering and leaving a two-cooling zone of the continuous casting machine and the opening shrinkage value of a casting roller of the two-cooling zone during the continuous casting process, so that the slab is pressed down and high-quality high-nickel steel is obtained; wherein the temperature of the slab entering and leaving the two-cooling zone of the continuous casting machine is 1100-1150 DEG C and 800-900 DEG C respectively, and the opening shrinkage value of the casting roller of the two-cooling zone of the continuous casting machine is 1.6-4.5 mm. The method provided by the application realizes solute element redistribution, slows down the defects of element central segregation, and thus improves the quality of high-nickel steel.

A brake disc for a disc brake may have a braking band made of gray cast iron or steel, provided with two opposite braking surfaces, each of which defines at least partially one of the two main faces of the disc. The disc is provided with a base layer constituted by steel having a nickel content of at most 15% which covers at least one of the two braking surfaces of the braking band.

The invention relates to steel for liquefied natural gas and a manufacturing method thereof, the steel comprises the following components in percentage by weight: 0.03-0.10% of C, 0.10-0.30% of Si, 0.8-1.5% of Mn, less than or equal to 0.005% of S, less than or equal to 0.006% of P, 5.0-6.5% of Ni, 0.10-0.30% of Mo, 0.1-1.0% of Cr and the balance of Fe and other inevitable impurities, and the components also need to simultaneously meet the following conditions: more than or equal to 10.5% of 4C + 2Ni + Mn-5Mo-0.5 Cr; and not less than 2.0% of 5C + 1.1 Mn + 1.8 Cr + 3.5 Mo. Under the condition of low nickel content, the steel plate has high deformation allowance in a low-temperature environment of-196 DEG C, so that the steel plate has high service safety; the yield strength of the steel plate is larger than or equal to 585 MPa, the tensile strength is 680-820 MPa, the ductility is larger than or equal to 18%, the impact energy at the temperature of-196 DEG C is larger than or equal to 150 J. The performance of the steel plate is similar to that of traditional 9Ni steel, but the cost is lower, and the steel plate can be used for manufacturing land storage tanks and containers of liquefied natural gas (LNG) and LNG transport ships.

The invention discloses a method for low-temperature synthesis of an ultra-high nickel single crystal positive electrode material based on a molten salt fluxing agent method, which comprises the following steps: mixing an ultra-high nickel precursor with the nickel content of more than or equal to 90% with a lithium source according to a stoichiometric ratio, then adding a certain mass of sodium chloride (NaCl) as a fluxing agent medium, and fully grinding; the mixed material is subjected to temperature programming sintering in an oxygen-containing atmosphere, and the highest sintering temperature is controlled between 700 DEG C and 850 DEG C; and cooling, washing, drying and sieving the sintered product to finally obtain the small-size ultrahigh-nickel single-crystal positive electrode material with good dispersity. By introducing the low-melting-point molten salt fluxing agent, the growth temperature of the single crystal is remarkably reduced, lithium volatilization and abnormal growth and agglomeration of crystal grains are effectively inhibited, and the obtained single crystal particles are uniform in size (2 microns) and have a good layered structure and electrochemical performance. The method is simple in process, low in cost and suitable for large-scale production of the ultrahigh-nickel single-crystal positive electrode material for the high-performance lithium ion battery.

The present application relates to the technical field of nuclear fusion device, disclose a kind of welding method of fusion device cooling pipe, wherein, the welding method of fusion device cooling pipe includes the following steps: preparation two cooling pipes to be welded;Welding adapter on the welding surface of one of the cooling pipes, the nickel content of the adapter is higher than the nickel content of the cooling pipe;The radial interior of adapter and the welding surface to be welded of adapter are polished;Two cooling pipes are matched, so that the welding surface of another cooling pipe is connected with the welding surface to be welded of adapter;Self-fusion welding is carried out on the adapter and another cooling pipe.The welding method of fusion device cooling pipe of the embodiment of the present application not only solves the problem of excessive magnetic permeability of the cooling pipe, but also improves the welding quality and welding qualification rate of the cooling pipe.

Disclosed herein are a nickel-based lithium metal composite oxide, a method of preparing the same, and a lithium secondary battery including a positive electrode including the same. The nickel-based lithium metal composite oxide includes: secondary particles including an aggregate of primary particles, in which a nickel content in the nickel-based lithium metal composite oxide is 50 mol% or more, the secondary particles including large secondary particles having a particle size of 10 m or more and small secondary particles having a particle size of 5 m or less, the nickel content in the large secondary particles is greater than the nickel content in the small secondary particles, the nickel content in the large secondary particles is 85 mol% to 99 mol% based on the total content of the transition metal in the nickel-based lithium metal composite oxide, and the nickel content in the small secondary particles is 75 mol% to 89 mol% based on the total content of the transition metal in the nickel-based lithium metal composite oxide.

This invention discloses a 440MPa grade steel plate with ultra-low temperature toughness and its preparation method, belonging to the field of steel materials technology. It solves the contradiction between insufficient strength and toughness grades and excessive nickel content in existing low-temperature steels. The composition of the 440MPa grade steel plate with ultra-low temperature toughness, by mass percentage, includes: C: 0.030%–0.085%, Si: 0.18%–0.38%, Mn: 0.95%–1.35%, P: ≤0.010%, S: ≤0.003%, Cr: 0.01%–0.25%, Mo: 0.01%–0.15%, Ni: 3.20%–4.25%, Cu: 0.12%–0.85%, Nb: 0.008%–0.035%, Al: 0.02%–0.036%, Ti: 0.008%–0.022%, with the balance being Fe and other unavoidable impurities. The steel plate of this invention exhibits excellent strength and low-temperature toughness.

A process for steam reforming a hydrocarbon feedstock containing one or more nitrogen compounds, including passing a mixture of the hydrocarbon feedstock and steam through a catalyst bed of one or more nickel steam reforming catalysts disposed within a plurality of externally heated tubes in a tubular steam reformer, each tube having an inlet to which the mixture of hydrocarbon and steam is fed, an outlet from which a reformed gas containing hydrogen, carbon monoxide, carbon dioxide, steam, ammonia and methane is recovered. The steam reforming catalyst at least at the outlet of the tubes comprises nickel dispersed over a porous metal oxide surface present as a coating on a non-porous metal or ceramic structure The nickel content of the metal oxide coating is in the range of 5 to 50% by weight and the thickness of the coating is in the range of 5 to 150 micrometres.

The invention relates to a method for measuring and analyzing nickel, silicon and phosphorus in nickel-containing pig iron, in particular to the technical field of detection and analys.The measuring and analyzing method comprises the steps that a nickel-containing pig iron sample is drilled, sampled and separated through a hard alloy drill bit, and a test sample is obtained; sequentially carrying out acid dissolution, solid-liquid separation and constant volume on the obtained test sample to obtain a test solution; measuring the contents of nickel, silicon and phosphorus in the obtained test solution by adopting a full-spectrum direct-reading inductively coupled plasma emission spectrum; a standard curve used in the full-spectrum direct-reading inductively coupled plasma emission spectrum measurement is obtained by dissolving a gradient nickel-containing pig iron standard sample to a constant volume. According to the determination and analysis method provided by the invention, the detection process is designed, so that the nickel, silicon and phosphorus elements in the nickel-containing pig iron with the nickel content of 8-15% can be jointly determined, and a scientific data basis is provided for production management and control.

The present application relates to big data measurement technical field, specifically for the intelligent measurement method and system of concealed nickel ore body nickel content based on big data, including the following steps, obtains response sequence and constructs difference structure, extracts boundary mutation analysis trend increment, purifies path ratio and determines the generation of measurement record.In the present application, the mutation characteristics in response change are identified by constructing difference direction trend, the effective data segment is screened by combining numerical difference and path response stability, the noise optimization and trend purification of complex change path are realized, the abnormal area of nickel content distribution is accurately positioned based on the comprehensive comparison of space distance and response amplitude ratio, the matching ability of space information and response relationship is enhanced, the identification precision of nickel content abnormal area in deep invisible area is improved, the measurement deviation caused by single numerical dependence is avoided, the measurability and practicality of the result are ensured, and the continuity intelligent identification and efficient measurement of unexposed target are realized.

The invention relates to the field of material surface treatment, in particular to a chemical polishing solution and a polishing method. The chemical polishing solution is suitable for the ferro-nickel alloy with the nickel content of 20-60% and the doped element content of less than 1%, and comprises an accelerant, a first acidic agent, a second acidic agent, a corrosion inhibitor, a brightener and a solvent. The first acidic agent comprises at least one of sulfuric acid, hydrochloric acid, nitric acid, phosphoric acid and hydrofluoric acid, and the content is greater than or equal to 5%. The second acidic agent comprises at least one of ammonium bifluoride, ammonium fluoride, formic acid, benzoic acid, acetic acid, propionic acid, butyric acid, lactic acid, oxalic acid, malonic acid, tartaric acid, malic acid and citric acid, and the content of the second acidic agent is 1%-50%. The total content of the first acidic agent and the second acidic agent is 6-60%. The accelerant is used for oxidizing metal nickel and metal iron, and the content of the accelerant is 0.01%-5%. And the content of the corrosion inhibitor is 0.1-5%. By combining the accelerant, the first acid agent, the second acid agent and the corrosion inhibitor, the dissolving speed of the nickel phase and the iron phase is balanced, the surface flatness is improved through the brightening agent, and the polishing effect is improved.

The application discloses an improved iodine oxidation-dimethylglyoxime spectrophotometry for detecting the content of nickel in steel, which comprises the following steps: obtaining an acidolysis solution by acidolysis of the steel to be detected; then diluting the solution to obtain a mother liquor to be detected; mixing the mother liquor to be detected with an ammonium citrate solution, water, an iodine solution, ammonia water and a dimethylglyoxime solution to obtain a chromogenic solution to be detected; and placing the chromogenic solution to be detected below a critical temperature to perform spectrophotometry to obtain the content of nickel in the steel to be detected. The application controls the adding amount of the ammonium citrate and the dimethylglyoxime in the chromogenic solution to be detected and the chromogenic temperature, so that the stable time of the absorbance of the chromogenic solution to be detected is greater than or equal to 60 minutes, the detection of the content of copper in the steel to be detected is less than or equal to 0.2%, and the probability of the result of the detection of the content of nickel in the steel to be detected (0.10%-50%) exceeding the allowable error of a navigation mark is less than or equal to 5%.

A copper alloy wire formed from a copper alloy containing iron, phosphorus, tin, and auxiliary elements, the remainder comprising copper and unavoidable impurities, the auxiliary elements being two or more elements selected from the group consisting of zinc, nickel, and chromium or being only zinc, the iron content being 0.1-1.0 mass%, and the balance being copper and unavoidable impurities. The content ratio of phosphorus is from 0.1 mass% to 0.6 mass% (inclusive), the content ratio of tin is from 0.1 mass% to 0.4 mass% (inclusive), the content ratio of zinc when zinc is contained is from 0.005 mass% to 1.40 mass% (inclusive), the content ratio of nickel when nickel is contained is from 0.005 mass% to 0.70 mass% (inclusive), the content ratio of chromium when chromium is contained is from 0.005 mass% to 0.20 mass% (inclusive), and the balance of zinc and unavoidable impurities. The mass ratio of the total content of iron, nickel, and chromium to the content of phosphorus is 3.0-7.0.

The invention provides a method for smelting nickel-containing steel grade by using a diamond wire, which comprises the following steps: adding the diamond wire, scrap steel and molten iron into a converter for oxygen blowing smelting to obtain converter molten steel; the converter molten steel is transferred into a steel ladle for deoxidation treatment, and deoxidized molten steel is obtained; transferring the deoxidized molten steel into a refining furnace for desulfurization and deoxidation to obtain refined molten steel; the refined molten steel is subjected to nickel adjusting treatment, and nickel-containing molten steel is obtained; and the nickel-containing molten steel is subjected to continuous casting treatment, and the nickel-containing steel billet is obtained. Wherein the absolute value of the difference value between the actual nickel content in the nickel-containing molten steel and the target nickel content in the nickel-containing molten steel is not larger than 0.005%. According to the method provided by the invention, the diamond wire is added into the converter along with the scrap steel and the molten iron, and the diamond wire is molten through oxygen blowing smelting, so that the nickel yield is ensured, the use amount of the nickel-iron alloy is greatly reduced under the condition that the nickel content in the prepared nickel-containing steel grade reaches the preset target value, the cost is reduced, and the production benefit can be effectively improved.

The application relates to the technical field of solar photovoltaic cells, in particular to a high-nickel conductive paste for N-type Topcon cells and a preparation method thereof, which is composed of, in mass percentage, nickel powder 40-80%, micron-level high-activity polycrystalline silver powder 5-50%, nickel powder sintering-aid glass powder 0.5-3% and organic carrier 5-12%. The nickel powder sintering-aid glass powder is low-Tg high-viscosity nickel powder sintering-aid glass powder after composition optimization; the low softening point ensures good fluxing effect; the high viscosity ensures the dispersion stability of silver-nickel particles and precisely controls the etching range, and meanwhile, the glass layer thickness after sintering is controlled in a proper range; through optimization of the nickel powder sintering-aid glass powder and the silver powder, the nickel doping amount is successfully increased to 40-80%, meanwhile, the cell efficiency is ensured to be better than or equivalent to that of pure silver paste, the reliability is good, and the paste truly has mass production capacity and value.

A process for steam reforming of a hydrocarbon feedstock containing one or more nitrogen compounds is described, the process comprising: passing a mixture of the hydrocarbon feedstock and steam through a catalyst bed consisting of one or more nickel steam reforming catalysts placed in a plurality of externally heated tubes in a tubular steam reformer, wherein each tube has an inlet to feed the hydrocarbon and steam mixture and an outlet to recover a reformate gas containing hydrogen, carbon monoxide, carbon dioxide, steam, ammonia and methane, and wherein at least at the outlet of the tube, the steam reforming catalyst is a structured steam reforming catalyst comprising nickel dispersed on the surface of a porous metal oxide present as a coating on a non-porous metal or ceramic structure, wherein the nickel content in the metal oxide coating is in the range of 5 to 50 wt.-% and the thickness of the coating is in the range of 5 to 150 micrometers.

A gas sensor comprises a sensor element extending axially with electrode pads on its surface at one rear end, metallic connection components that elastically contact the electrode pads, and a separator that holds the metallic connection components. The metallic connection components are made of an iron-based alloy and contain nickel in the range of 9.75 to 10.25 wt%, chromium in the range of 23.00 to 23.90 wt%, manganese in the range of 5.80 to 6.20 wt%, nitrogen in the range of 0.47 to 0.53 wt%, unavoidable impurities, and residual iron. The gas sensor can be manufactured at low cost and exhibits excellent reliability of the electrical connection between the metallic connection components and the sensor element at high temperatures.

An austenitic stainless steel material that has high strength and has excellent hydrogen embrittlement resistance in a high-pressure hydrogen gas environment is provided. An austenitic stainless steel material of the present disclosure has a chemical composition consisting of, in mass%, C: 0.100% or less, Si: 1.000% or less, Mn: 8.00 to 20.00%, P: 0.050% or less, S: 0.0050% or less, Cr: 18.00 to 30.00%, Ni: 10.00 to 25.00%, N: more than 0.350 to less than 0.700%, V: 0.010 to 0.200%, Nb: 0.010 to 0.300%, Al: 0.200% or less, and O: 0.0100% or less, with the balance being Fe and impurities, in which Fn1 defined by Formula (1) in the description is 18.0 or more when the content of Ni is less than 17.00% and is 22.0 or more when the content of Ni is 17.00% or more. In the steel material, a number density of (Cr, Nb) composite precipitates having an equivalent circular diameter of 50 to 500 nm is 1.00 / µm2 or more.

A positive electrode active material comprising: (1) a lithium nickel-cobalt-manganese-based composite oxide having a nickel content 90 mol. % or more among metals excluding lithium; and (2) a metal element M1 doped in the lithium nickel-cobalt-manganese-based composite oxide. The metal element M1 comprises Al and at least one of Zr or Ti. A weight of Al is 8,000 ppm or more based on a total weight of the positive electrode active material, and a total weight of the metal element M1 is 9,000 ppm to 12,000 ppm based on the total weight of the positive electrode active material. A method for preparing the positive electrode active material, and a positive electrode and a lithium secondary battery comprising the positive electrode active material are also disclosed.

(A) General formula Li 1+x TM 1-x a core material based on O2, wherein TM is a combination of Ni and at least two of Mn, Co and Al, and optionally at least one further metal selected from Mg, Ti, Zr, Nb, Ta and W, where x is in the range of -0.05 to +0.05, and the nickel content is in the range of 80 to 99 mol% of TM; (B) particles of cobalt compound(s) in which at least some of the cobalt is in the +III oxidation state; (C) a shell containing at least one oxide of B or W 1. A cathode active material comprising: The core material (A) is a polycrystalline material in which secondary particles are composed of primary particles, and particles (B) of a cobalt compound are concentrated on the surfaces of the secondary particles.

The present application relates to the technical field of special austenitic stainless steel preparation, and particularly relates to an economical easy-to-cut high-formability austenitic stainless steel and a preparation method thereof. The economical easy-to-cut high-formability austenitic stainless steel is composed of the following components: 5.5-6.8% of Ni, 1.5-3.5% of Mn, 16.5-18.5% of Cr, 0.15-0.20% of S, 0.8-1.5% of Cu, 0.01-0.03% of RE, 0.12-0.25% of Ca, 0.002-0.005% of Mg, C<=0.08%, Si<=1.0%, N<=0.05%, and the balance of iron and inevitable impurities. In the present application, the content of nickel is reduced to 5.5-6.8%, the material cost is reduced by 20-25%, the cutting force is obviously reduced, the tool life can be effectively prolonged, and the excellent mechanical properties and corrosion resistance are combined.

The invention relates to the technical field of metallurgical engineering, in particular to a production method of nickel-iron alloy for metallurgy. The method comprises the following steps that the high-nickel-titanium metallurgical waste is divided into a plurality of categories according to the nickel content and the titanium content; and the multiple types of waste materials are subjected to smelting and post-treatment correspondingly, and finished nickel-iron alloy products with different nickel contents are obtained. According to the method, high-valued recovery of nickel and titanium resources in the waste is achieved through fine classification, multi-stage refining control and vacuum purification of the waste, the produced high-purity nickel-iron alloy can be directly used for smelting high-end maraging steel, degradation use is effectively avoided, the raw material cost is remarkably reduced, and the resource utilization rate is increased.

The invention relates to the technical field of solar photovoltaic cells, in particular to high-nickel-content conductive paste for an N-type Topcon cell and a preparation method of the high-nickel-content conductive paste, and the high-nickel-content conductive paste comprises the following components in percentage by mass: 40-80% of nickel powder, 5-50% of micron-sized high-activity polycrystalline silver powder, 0.5-3% of nickel powder co-sintering glass powder and 5-12% of an organic carrier. Wherein the nickel powder sintering-assisted glass powder is low-Tg high-viscosity nickel powder sintering-assisted glass powder subjected to component optimization, the low softening point ensures a good fluxing effect, the high viscosity ensures the dispersion stability of silver-nickel particles, the etching range is accurately controlled, and meanwhile, the thickness of a glass layer after sintering is controlled within a proper range; according to the invention, through optimization of sintering of the nickel powder with the assistance of the glass powder and the silver powder, the nickel doping amount is successfully increased to 40-80%, meanwhile, it is ensured that the battery efficiency is superior to or equivalent to that of pure silver paste, the reliability is good, and mass production capacity and value are truly achieved.

The invention relates to a low-nickel high-iron-copper alloy glass mold material and a preparation method thereof, and relates to the field of alloy materials and preparation thereof, and the low-nickel high-iron-copper alloy glass mold material comprises the following components in percentage by weight: 4.00 to 6.50 percent of Ni, 8.5 to 11.00 percent of Al, 0.00 to 1.00 percent of Zn, 3.00 to 5.00 percent of Fe, 0.00 to 0.20 percent of Sn, 0.00 to 0.50 percent of Si, 0.00 to 0.10 percent of Pb, and the balance of Cu and inevitable impurities. The preparation method comprises the following steps that smelting is conducted at the temperature of 1250-1300 DEG C according to the composition proportion, and alloy liquid is obtained; the alloy liquid is poured into a mold at the temperature of 1200-1250 DEG C, a casting mold is subjected to heat preservation and cooling for 2-3 h and taken out, and a blank is obtained; and cutting and shaping the blank, carrying out heat treatment, and cooling to obtain the low-nickel high-iron copper alloy glass mold material. By regulating and controlling the composition and the preparation process, the nickel content in the glass mold material is reduced, and meanwhile, the good wear resistance, hardness, thermal stability and heat-conducting property of the material are kept.

The invention relates to the technical field of high-strength steel material welding, in particular to a stranded low-temperature phase change welding wire and a preparation and welding method thereof. A stranded structure formed by the center wire and the peripheral wires is adopted, the chemical component proportion of the whole welding wire is accurately controlled by changing the number, the diameter and the combination mode of the center wire and the peripheral wires, particularly, the chromium content is controlled to be 9%-12%, and the nickel content is controlled to be 8%-11%; the martensite phase transformation starting temperature of weld metal is accurately set in an ideal interval from 200 DEG C to room temperature, beneficial pressure stress is actively generated by utilizing martensite phase transformation of the weld metal in the specific temperature interval, inherent welding residual tensile stress is counteracted, and active and in-situ regulation and control of the welding residual stress are achieved; in addition, a magnetic field unit is applied in the martensite phase transformation process, and the regulation and control effect of the residual stress is further improved.

The low-grade nickel ore circulating heap leaching equipment provided in this invention includes: atmospheric pressure heap leaching pool, a number of acid pools corresponding one-to-one with the atmospheric pressure heap leaching pool, and an acid circulation structure. The discharge outlet of the atmospheric pressure heap leaching pool is connected to the acid pool, and the acid circulation structure is connected to the atmospheric pressure heap leaching pool and the acid pool. It is used to detect the nickel content in the acid pool and guide the liquid from a certain acid pool to a certain atmospheric pressure heap leaching pool based on the detection results. In this way, the circulating drip irrigation of acid solution can be realized to realize circulating leaching of nickel ore, so that the nickel in the acid solution can be gradually enriched, and the leaching of nickel can be realized without increasing the amount of acid solution, effectively reducing the treatment cost of low-grade nickel ore.

An electrolyte, a battery cell, and a vehicle with a vehicle battery is provided. The electrolyte includes a ternary salt, dual-cyclic solvents, a linear carbonate solvent, and quaternary additives. The ternary salt includes lithium hexafluorophosphate (LiPF6), lithium bis(fluorosulfonyl)imide (LiFSI), and lithium difluoro(oxalate)borate (LiDFOB). The dual-cyclic solvents include ethylene carbonate (EC) between 0-30% by volume and fluoroethylene carbonate (FEC) between 0-30% by volume. The linear carbonate solvent includes at least one of ethyl methyl carbonate (EMC), dimethyl carbonate (DMC), or diethyl carbonate (DEC). The linear carbonate solvent is between 60-80% by volume. The quaternary additives include vinylene carbonate (VC) between 0.5-2% by weight, trimethylsilyl (TMSi) between 0.25-1% by weight, bis(2,2,2-trifluoroethyl) carbonate (DFDEC) between 0.5-2% by weight, and succinic anhydride (SA) between 0.25-1% by weight.

A three-dimensional printing kit can include a binding agent including a binder in a liquid vehicle and a particulate build material including from about 80 wt % to 100 wt % stainless steel particles having a D50 particle size from about 5 μm to about 125 μm. From about 75 wt % to 100 wt % of the stainless steel particles can be austenitic stainless steel particles including from about 10 wt % to about 12.3 wt % nickel, from 10 about 10 wt % to about 20 wt % chromium, from about 1.5 wt % to about 4 wt % molybdenum, and up to about 0.08 wt % carbon. The austenitic stainless steel particles can have an equivalent nickel content from about 10 wt % to about 15.5 wt %.

The application provides a double-layer coated full-concentration gradient positive electrode material and a preparation method and application thereof. The double-layer coated full-concentration gradient positive electrode material comprises a base material, a connecting layer on the surface of the base material, and a rock salt layer on the surface of the connecting layer away from the base material. The base material comprises a high-nickel ternary material, and the nickel content gradually decreases from the core to the surface of the base material, and the manganese content and the cobalt content gradually increase. The connecting layer comprises a metal oxide, and the rock salt layer comprises a cobalt-rich rock salt phase material. The double-layer coated full-concentration gradient positive electrode material is modified by constructing a full-concentration gradient structure base, a rock salt layer, and a connecting layer, which is beneficial to improving the structural stability, cycle performance, and rate performance of the material.

The application discloses a low grade nickel ore cycle leaching method and system, the method includes the following steps: the raw ore is divided into mud type ore and particle ore; The mud type ore is sent to several atmospheric pressure heap leaching pools, and the grain type ore is sent to atmospheric pressure stirring leaching pools. Drip irrigation of acid solution to multiple atmospheric pressure heap leaching pools and recovery of the leaching solution of each atmospheric pressure heap leaching pool; The nickel content concentration in the leaching solution of each atmospheric pressure heap leaching pool was detected. According to the nickel content concentration in the leaching solution of each atmospheric pressure heap leaching pool, the leaching solution of a certain atmospheric pressure heap leaching pool was drip-irrigated into another certain atmospheric pressure heap leaching pool. This application provides a low grade nickel ore cycle leaching system, including a ore washing module, a gravity beneficiation module, a churn leaching module and a heap leaching module. The low grade nickel ore cycle leaching method and system provided in this application can realize the cycle leaching of nickel ore and gradually enrich nickel in the acid solution. On the premise of not increasing the amount of acid solution, the nickel leaching can be realized and the processing cost of low grade nickel ore can be effectively reduced.