62results about How to "Does not affect recovery" patented technology

The invention provides an inhibitor for pyrrhotite flotation. The inhibitor comprises sodium carbonate, sodium pyrosulfite and triethylene tetramine, pyrrhotite in pulp can be effectively and selectively inhibited, meanwhile basically no affect is brought to the flotation of pentlandite and copper pyrite, and the inhibitor is particularly suitable for the flotation and separation of minerals difficult to select such as high content of pyrrhotite and low quality of cooper-nickel; and the invention further provides a preparation method and an application method of the inhibitor for pyrrhotite flotation, the operations are extremely simple and convenient, and excellent industrial prospect is provided.

The invention provides a method for extracting and preparing corosolic acid from plants, which comprises the steps of poaching and removing water-soluble substances, extracting basic organic solvents of total triterpene acids and enriching and purifying macroporous absorption resin of corosolic acid. Plants containing corosolic acid are adopted as raw material and the water-soluble substances are removed after boiled by pure water; regarding filter residue 30 to 60 percent of basic ethanol or methanol water solution is adopted to extract total triterpene acids and go through settling separation under the condition that pH is 4.5 to 7.5 to obtain crude products of total triterpene acids which are fully dissolved by 85 to 100 percent of ethanol or methanol and undissolved substances are removed; filtered liquor goes through the absorption and elution of macroporous absorption resin; the final concentration of ethanol or methanol in the elution liquor of corosolic acid is adjusted to be less than or equal to 50 percent and pH value thereof is adjusted to be less than or equal to 7.0; corosolic acid is obtained through settling separation under the condition. The method has simple preparation technique, high separation and purification efficiency, easy industrial production, low production cost and relatively great generalization.

The invention discloses a method for preventing gob-side entry rock burst through side-drawing filling. The method comprises the following steps: additionally arranging a bracket for supporting behind a stope face bracket; constructing, exploding and drilling holes in entry sides behind the support bracket at certain intervals, wherein shallow holes are pre-cracking holes for loosening coal, and deep holes are throwing holes for throwing loosened coal into the entry; filling a part of the entry to form a pressure relief protection zone, and forming a wedged clamping anti-burst structure through top plates and bottom plates; tunneling in a previous mining surface filling entry following the mining surface gob-side entry, supporting by using a shed, carrying out guniting on the surface of the entry behind a tunneling head, and reinforcing and preventing and extinguishing fire in partial areas by taking backfill grouting measures. A novel anti-burst technical system for performing explosion, filling, in-situ tunneling and supporting behind the mining surface is established.

The invention discloses a method for improving recovery rates of gold and silver from chalcopyrite. The method comprises the steps of: firstly crushing raw ore until the granularity is smaller than 12mm, adding quicklime, grinding, adding water to obtain ore pulp, then adding a collector and a foaming agent for chemical regulation, stirring, entering rough concentration for copper floatation, and carrying out scavenging, concentration and other steps on the ore pulp after rough concentration to obtain gold-silver-containing copper concentrate with high gold and silver grades. According to the invention, on the basis of ensuring traditional copper concentration economic and technical norms, the gold and silver recovery rates are improved by improving gold and silver grades in the copper concentrate, and the recovery rates of the accompany gold and silver in the chalcopyrite reach 85.11% and 89.97%, respectively; and the method is simple, the onsite production is easy to operate and the comprehensive utilization rate of ore resources is improved.

The invention provides a coking wastewater advanced treatment and evaporative crystallization zero discharge process which comprises the following steps: A) sequentially performing flocculation treatment, catalytic ozonation treatment, biological activated carbon filter treatment, multi-medium filtration, ultrafiltration treatment and first reverse osmosis concentration treatment on coking wastewater subjected to biochemical treatment, so as to obtain first treated water and first concentrated water; (B) sequentially subjecting the first concentrated water to two-stage softening treatment and second reverse osmosis concentration treatment to obtain second treated water and second concentrated water, wherein the first-stage softening adopts chemical softening and microfiltration combined filtration treatment, the second-stage softening adopts resin softening; and C) carrying out evaporative crystallization on the second concentrated water to obtain third treated water and crystal salt. The process is reasonable in linkage, stable, efficient and safe to operate and good in treatment effect, the treated water can be used as production process water or circulating cooling water replenishing water, finally zero emission of the coking wastewater is achieved, and economic benefits are remarkable.

The invention discloses a copper-sulphur separation and ore dressing method for high-sulphur copper ores. The copper-sulphur separation and ore dressing method comprises the following steps: crushing, grinding and grading high-sulphur copper raw ores, feeding a grading overflow to a low-intensity magnetic separation operation, pre-selecting low-intensity magnetic concentrates, that is, pyrrhotites, and discharging low-intensity magnetic tailings; feeding the low-intensity magnetic tailings to a copper flotation operation, obtaining copper concentrates with a Cu grade of greater than 18% and a copper recovery rate of greater than 85%, and discharging copper flotation tailings, wherein during the copper flotation operation, lime is used as a pH regulator and a pyrite inhibitor, butyl xanthate is used as a collector, and No. 2 oil is used as a foamer; and feeding the copper flotation tailings to a flotation sulphur dressing operation to obtain sulphur concentrates, and throwing final tailings. The copper-sulphur separation and ore dressing method disclosed by the invention has the advantages of being stable in ore dressing indexes, low in medicament consumption, clean and environment-friendly, simple and convenient to operate, easy to operate and manage in the field, and the like; and the pyrrhotites are pre-selected through the low-intensity magnetic separation, the interference of the pyrrhotites on the copper flotation is eliminated, thus copper flotation indexes are greatly improved, the phenomena of high fluctuations of a copper concentrate grade and a copper recovery rate are avoided, and energy-saving and consumption-reducing effects are remarkable.

The invention discloses a universal rapid detection method for micromolecule poisonous and harmful materials in powdery food. The method is characterized by comprising the following steps of performing simple and universal extraction and purification on a liquid milk sample to obtain a loading solution; preparing a mixed standard solution and making a matrix-adding standard curve; then measuring the micromolecule poisonous and harmful materials in the liquid milk by high performance liquid chromatography-triple quadrupole tandem mass spectrometry combination; and finally performing concentration calculation. The method has the advantages that the pretreatment and instrumental analysis processes have strong compatibility for compounds with different physicochemical properties; detection efficiency is high; operability is strong; detection limit can meet all subjected target objects; and detection cost is reduced.

The invention relates to a high-efficiency image collection and compression method. The method includes: adopting an image detector array to acquire a quantized digital image; utilizing a lower sampling module to acquire thumbnail data of an original image; acquiring data of the original data after dimension reduction through a compression sensing module; sequentially outputting the thumbnail data and compression sensing dimension-reduction data through a compressed data output module according to a preset compression ratio to form code stream used for transmission or storage; after the compressed data are stored and transmitted, completing reconstruction of the original image through an image reconstruction module. By the high-efficiency image collection and compression method, complexity of conventional image compression is lowered effectively, and the defect that a reconstruction step is needed to realize image looking-back on the basis of conventional compression sensing data is overcome.

The invention belongs to the technical field of arterial blood pressure measurement, and discloses a high-accuracy continuous non-invasive blood pressure measuring device with the self-adaptation calibration function. A photoelectric sensor is adopted for detecting pulse waves, reverse bias voltage is provided for a light receiving tube, the sensitivity and stability of the light receiving tube are enhanced, quite weak pulse wave signals can be detected, and the waveform quality of the detected signals can be improved; a broadband filter is adopted, and it is ensured that pulse wave shapes are distortionless; due to the technologies, correcting variables can be correctly extracted from pulse waves. The device recognizes propagation time PTT related to systolic pressure and diastolic pressure from pulse waves, and extracts various variables according to pulse wave form changes to recognize various anomalous changes of self-adaptation correction PTT in real time; on the basis of an existing mathematic model, blood pressure can be measured in a high-accuracy, continuous and noninvasive mode under the complex clinic condition, and calibration and repeated standardization can be achieved not depending on conventional methods such as cuff oscillography.

A valve with spherical wedge flap has an opening-closing set of spherical wedge flap and a sealing set of spherical wedge. The diameter of spherical wedge is slightly greater than that of spherical seat and the center of said spherical seat is slightly higher than reference plane, so controlling the valve easily. Its fastening hoop connection method features that the joint, sealing hoop, grasp hoop and nut are used. Its advantages are efficiency sealing and reliable joint.

The invention provides a paste strip grouting combined filling mining method for a coal mine goaf. The method comprises the steps that 1, before working face stoping, a grouting roadway is tunneled above a working face; 2, paste filling mining is conducted in a filling area (1); 3, gob-side entry retaining is conducted in a transportation roadway of an unfilled area (2); 4, grouting drill holes are formed in the unfilled area (2) of the grouting roadway; 5, after the working face is pushed by a certain distance, grouting filling is conducted on the unfilled area (2) of the grouting roadway; and 6, the steps 2-5 are repeated till mining of a mining area is completed. According to the paste strip grouting combined filling mining method for the coal mine goaf, under protection of a filling hydraulic support, paste strip filling is conducted, and grouting filling is conducted on the unfilled area through the grouting roadway; and according to the method, pressed coal under the three conditions can be liberated, the coal recovery rate is increased, and the problem of emission of mine/power plant waste such as coal gangue/coal ash can be solved.

The invention relates to a method for checking the arachidonic acid content in milk and milk products. After a sample is processed, a gas-phase spectrum meter is used for check. The sample processing method comprises the following steps: step 1, normal hexane and absolute-methanol-potassium-hydroxide are added into the sample for carrying out etherification reaction; step 2, the solution obtained in step 1 is centrifuged or stands until the organic phase is clarified to extract the supernatant fluid to obtain a solution to be checked. Water is added into the solution after the etherification after step 1 or before step 2. For a solid or liquid sample, the sample is firstly processed as following: step A, ammonia water is added into the sample, and ethanol is added after reaction; step B, ether and sherwood oil are added for layer separation in a standing mode, the organic phase is taken and concentrated until a dried state, and the sample concentrated liquid is obtained. The method of the invention has the advantages of short extracting time, complete extraction, simple and convenient operation and high accurate rate, and is suitable for checking a great number of samples.

The invention belongs to the field of mining and relates to a sectional filling method of an old lane. The sectional filling method of the old lane comprises the following steps: A) drawing a stratigraphic relation layout diagram of a working face and the old lane and marking the positions of the old lane, the working face and other lanes, the shoring way of the old lane and other parameters in adetailed manner; B) selecting fly ash or slag ash and other radiation-free materials with lower sulfur content as filling materials, screening the filling materials, then bagging and putting into a well; C) filling the old lane in the position which is ahead of the working face 50m at least, and performing stage-by-stage step-by-step filling on the old lane from the working face to a terminal mining line; and D) performing sectional filling construction. The method has the beneficial effects that the sectional filling is adopted, the filling efficiency is high, the recovery and the filling donot affect each other, the filling cost is low, and the consumed time is short, thereby not only solving the problems of ground pressure occurrence of the working face, roof caving, subsidence of a support, loss of coal resources and the like during the recovery period, but also avoiding the defects of waste of the filling materials and long consumed time for filling.

The invention relates to a balloon system for postpartum recovery. The balloon system comprises a catheter, a main balloon, an auxiliary balloon, a main balloon liquid injection channel, an auxiliaryballoon liquid injection channel, a drainage channel, a main balloon pressure reducing valve, an auxiliary balloon pressure reducing valve, a pressure detector and a control system. The balloon systemcan be used for postpartum compression hemostasis and uterus recovery of a puerpera, implantation of other uterine supports can be reduced, and trauma to the puerpera is reduced.

The invention discloses an oxygen mask for medical use. The oxygen mask comprises a mask main body which is made from a transparent plastic material, wherein a square hole is formed in the lower side of the upper surface of the mask main body; a square cover is hinged to one side of the hole wall of the square hole; a groove is formed in the surface of the hole wall of the square hole, and a convex block corresponding to the groove is formed on the edge of the lower surface of the square cover; a baffle plate which is integrally molded with the mask main body is arranged in the middle of the inner cavity of the mask main body, and the baffle plate is arranged on the lower side of the bottom of an air duct plugging hole; and a soft curtain is connected to the lower end face of the baffle plate. By virtue of the structure provided with the square hole and the square cover, medical personnel can conduct an artificial respiration measure on a rescued patient without influencing oxygen delivery, so that the oxygen mask is conductive to patient rescue; the medical personnel can feed water to the patient by virtue of the square cover when the patient feels thirsty; and through the structure provided with the baffle plate and the soft curtain, infused oxygen is prevented from mixing with gas exhaled from the patient, so that the air quality is not influenced.

The invention discloses preparation and application methods of a combined regulator for roughing of low-grade scheelite. The combined regulator mainly comprises inorganic phosphate and organic phosphate, wherein the structure of the inorganic phosphate is as shown in a formula 1 which is described in the specification, and X in the formula 1 is in a range of 2-5; and the structure of the organic phosphate is as shown in a formula 2 which is described in the specification, and n in the formula 2 is in a range of 2-8. Under the condition of proper dosage and usage, a calcium-containing mineral can be efficiently separated on the premise of ensuring the recovery rate of a target mineral. The combined regulator is high in adaptive capacity and small in dosage, and precise separation of different calcium-containing minerals is achieved by regulating and controlling a component ratio.

The invention relates to the technical field of energy-saving comprehensive utilization of mineral resources, in particular to a method for optimizing low-grade laterite-nickel ore through gas-coal double-base direct reduction magnetic separation. The method comprises the following specific steps of raw material treatment, carrying out reduction roasting on a material and reduction coal mixture by using a gas-coal double-base direct reduction roasting kiln; cooling a laterite-nickel ore particle material subjected to reduction roasting and sequentially passes through a coal separation recycling system, a double-roller grinding system, a Raymond grinding system and a magnetic separation system to obtain a nickel alloy product, and the mass percent of nickel contained in the nickel alloy product is that Ni is greater than 8%. According to the method, the problems of low reduction efficiency, long reduction heating time, high heating temperature and poor heat preservation effect in the prior art are solved.