67 results about "Hazardous metals" patented technology

A temperature management indictor having simple structure is provided, which, not containing a hazardous metal, especially mercury among others, is safe and excellently durable, especially durable against light and repetition of heating and cooling cycle, is capable of indicating specific temperature ranges by means of reversible color changes, and also is able, as need be, to indicate an arrival at a specific temperature by means of an irreversible color change. A temperature management indicator 10 comprises; a reversible temperature indicating member 14 including reversible temperature indicating pigment particles devoid of mercury, which reversibly undergoes color changes at a predetermined temperature, wherein in the reversible temperature indicating member 14, the reversible temperature indicating pigment particles contain an iron-containing complex compound and are dispensed to be dispersed in a resin thereof.

The invention provides a method for removing hazardous matters in plating bath of an ageing copper foil, aiming at overcoming the defects of the traditional industrial processing method that ageing plating bath is discharged, which seriously pollutes environment and activated carbon has poor absorbability for CI<-> and poisonous metal and the absorption of the activated carbon does not have selectivity and copper sulphate with high concentration in the plating bath is also absorbed, thus being easily saturated, having short period, etc. The method uses a purification processing unit, adopts absorption combining activated carbon and ion exchange resin. On the premise that the plating bath is not discarded, hazardous metal ions such as Zn, Fe, Cr, Pb, Sb, As, etc. and organic pollutants with comparatively high concentration in the plating bath are removed. Highly acidic ion exchange resin and weakly alkaline ion exchange resin are respectively contacted with a regenerant and are produced after reaching saturated absorption. The method for removing hazardous matters in plating bath of the ageing copper foil has the advantages that on the premise that the plating bath is not discarded, the hazardous metal ions, Cl<->, organic pollutants with comparatively high concentration in the plating bath are removed; the method for removing hazardous matters in plating bath is characterized by high purification rate, strong selectivity and having resin reproduced that can be reused and does not pollute environment, etc., thus having good economic benefits.

The invention discloses a method and a device for purifying and recycling a chromium electroplating solution and a waste solution thereof. The method directionally solves the problem of metal pollutions and comprises the following steps: adopting a purification apparatus to effectively eliminate various harmful metallic impurities such as copper, zinc, nickel, iron and the like; concentrating the solution after the purification; and finally recycling the solution into an electroplating bath, wherein the recycling rate reaches more than 95 percent. Simultaneously, through an automatic control system, the electroplating bath, a recovery tank, the purification apparatus, a concentrating device, an analysis meter and the like are combined together organically to achieve full automatic operation. The method and the device solve the problem that the chromium electroplating solution cannot be recycled in clean production for years in China. The method avoids a large quantity of chromium-containing wastewater discharges, effectively saves additional supplementation of chromic anhydride at the same time, and obtains double produce effects of recycling economy and clean production.

The invention discloses a method for testing the destructive effect and the performance impact of alkali metal and zinc vapor to coke. The method comprises the following steps: uniformly mixing excessive active carbon powder and alkali metal carbonate or zinc oxide, arranging the mixture in a corundum crucible internally provided with a step, arranging a porous corundum gasket on the step in the crucible, arranging a reacting coke sample on the gasket, covering a cover, keeping a container in a sealing state; arranging the container in a constant-temperature region of a muffle furnace, raising the temperature to 1300 DEG C at a certain rate, keeping the temperature for 90min to ensure that metal steam is completely absorbed by coke; after reacting, recording the mass of a coke sample with the particle size being more than 23mm, calculating the specific gravity of the pulverized coke; and testing a thermal state performance of a sample which is eroded by metal vapor. The method is capable of singly representing a direct destructive effect of the metal vapor to the coke, is beneficial to finding a relationship between the steam enrichment and the coke performance, and provides a quantization basis for reasonably controlling an alkali load and a zinc load which are charged in a blast furnace.

The invention relates to a method for treating incinerated fly ash with harmful heavy metals, and provides a method capable of enabling waste particularly harmful heavy metals especially to be separated from the fly ash generated by a garbage incinerator. The invention is characterized in that quartz sand and water are added in the waste incinerated fly ash with harmful heavy metals, and using a wet turbine taper for screening and separating the harmful heaving metals.

The invention discloses a two-section sludge gas-generating treatment method and a two-section sludge gas-generating treatment device. The treatment device includes a sludge dewatering unit, a coal briquette manufacturing module and a sludge combustion treatment unit. In the invention, dewatered sludge is mixed with pulverized coal to manufacture coal briquettes and the coal briquettes are subjected to high-temperature pyrolysis in a two-section gas-generating furnace so that reduced coal gas can be produced through combustion of the sludge fully. Meanwhile, the coal briquettes are subjected to further dehydration and drying and anaerobic destructive distillation through high-temperature reduced coal gas. Destructive-distilled coal gas generated in the destructive distillation process is fed into the gas-generating furnace again for being used in combustion so that toxic and harmful substances in the destructive-distilled coal gas are completely eliminated. Meanwhile, harmful metal elements, such as copper, zinc, lead, chromium, arsenic and the like, which are not easy to deform, in the sludge enter into fused ash residue and are solidified after temperature decreasing, thereby satisfying a requirement of safe treatment.

An object of the present invention is to provide a structure of a metal collecting material for use in seawater or river water or industrial wastewater to give the most excellent adsorption efficiency. Another object of the present invention is to provide a process for efficiently separating and recovering valuable metals or noxious metals from a metal collecting material having collected said valuable metals from seawater or noxious metals from river water or wastewater with the least possible waste generation.

A metal collector according to an aspect of the present invention is formed by stacking at least partially alternate layers of a fibrous metal collecting material with a spacer for introducing a liquid to be treated into said collecting material, wherein the area of spacer side faces represents 25-75% of the total area of collecting material side faces and spacer side faces in the side faces of the stack. A process for eluting and recovering a metal from a metal collecting material according to another aspect of the present invention comprises the steps: (1) contacting the metal collecting material having absorbed a metal with a dilute eluent, (2) contacting the metal collecting material with an eluent more concentrated than in step 1 to recover the metal into the eluent; and (3) contacting a metal resorbing material with the eluate from step 2 to resorb the metal.

The invention provides a various resource wastes signal coloration, comprising a primary signal coloration and a secondary signal coloration, wherein, the primary category comprises twelve classes, the colors of red, orange, yellow, green, blue-green, blue, purple, pink, white, grey, brown and black are respectively taken as the signal coloration of hazardous and noxious substances, metal, wood-bamboo, glass, paper, appliance, seeds, textile products, plastic, masonry terracotta, compost and rubber; the secondary category is the close category of waste resources including various substances in the primary category according to the needs of waste product purchase and the waste circulation. The invention classifies the seven kinds of the primary category resources again and designs the secondary signal coloration which can be increased, decreased, separated and jointed. The signal coloration of each small category consists of the primary signal coloration of category and the secondary signal coloration representing the small category; the secondary signal coloration and the primary signal coloration can be distinguished by the rich color or light color, or the shape, the area and the combination. The general principle is to give prominence to the primary signal coloration in order to ensure that the people who drop litter can rapidly find out the primary category container and then the secondary category container.

The invention relates to a method for measuring leaching parameters of a dump leaching mineral pile at different depths. A parallel column leaching test system is formed by using two or more test columns with different lengths, wherein the number of the test columns and the number of measuring points of leaching parameters of a dump leaching mineral pile to be measured are the same; the ore loading height of each test column and the depths of the measuring points of the leaching parameters of the dump leaching mineral pile to be measured are the same. According to the method provided by the invention, a leaching solution and test ore samples of the dump leaching mineral pile at the different depths can be conveniently obtained, so that the leaching parameters, such as leaching rates of useful metals, concentrations, pH values and Eh values of a leaching agent and an oxidizing agent at different depths of the dump leaching mineral pile and the variation of the parameters along with the time are detected. Meanwhile, the invention further provides a method for detecting the leaching parameters, such as removal rates of harmful metals, recovery rates of the useful metals, concentrations, pH values and Eh values of the leaching agent and the oxidizing agent at different depths of the dump leaching mineral pile and the variation of the parameters along with the time for dump leaching treatment of solid wastes, harmful metal contamination soil and electronic wastes.

The invention provides a voice control intelligent garbage can capable of achieving classification. The voice control intelligent garbage can comprises an intelligent scanning unit, a garbage classification detection unit, a mechanical drive unit, a prompt alarm unit, a central coordination unit, an independent power supply unit and a free moving unit. The intelligent scanning unit is used for scanning whether harmful metal exists in garbage or not. The garbage classification detection unit is used for detecting the dryness, wetness and rotting degree and weight of the garbage and conducting recognition and classification on the garbage. The mechanical drive unit is used for driving a movable base arranged at the bottom of the garbage can to move, a garbage can cover to be opened and closed and moving wheels to move. The central coordination unit is used for receiving a voice control instruction of a user and then sending the control instruction to the mechanical drive unit to controlthe opening and closing of the garbage can cover and the moving distance and direction of the garbage can. The free moving unit comprises the multiple moving wheels and an ultrasonic obstacle avoidingmodule. According to the voice control intelligent garbage can, the garbage classification efficiency is improved, intelligent putting is achieved, and the usage experience of the user is improved.

The invention discloses a detecting device and method for continuous wave terahertz real-time watermark imaging. The detecting device comprises a continuous wave terahertz radiation source, a collimating beam-expanding system, a high-resistance silicon wafer, an argon ion laser, an off-axis parabolic lens, a sample platform, a terahertz wave detector and a computer. According to the detecting device provided by the invention, the collimating beam-expanding system is utilized to collimate the terahertz wave into parallel beams; the off-axis parabolic lens is used for expanding the beams for the second time; after the beams penetrate through a sample, the beams are focused on the terahertz wave detector; the computer is used for performing real-time imaging display on the image; the turning-on/off control on the detecting device is realized by utilizing a fact that whether the argon ion laser beam illuminates on the high-resistance silicon wafer or not. The detecting device for continuous wave terahertz real-time watermark imaging provided by the invention has the advantages of compact structure, high response speed, convenient switching, real-time watermark imaging and significant practical application value, and is also capable of performing non-destructive detection on the hazardous metal hidden in the packaging articles such as newspaper, fabrics and plastics.

A process for treating neutralized waste solids from the processing of titanium-bearing ores, whereby the neutralized waste solids are contacted with an acid under conditions effective to dissolve at least some of the waste solids, and then residual undissolved solids are separated out prior to injection of the remainder into a subterranean waste disposal well. The process is particularly adapted to disposal of hazardous metal waste solids which have been deposited over time in a waste disposal pond but which are judged as posing a hazard for migration from the pond to surface and subterranean waters.

A rust-proof coating, which does not contain a hazardous metal such as chromium and is able to form a thin coating in which crack generation is inhibited even after a baking treatment at a high temperature, including based on the whole composition, 5 to 40% by weight of an organic silicon compound, 0.05 to 5.0% by weight of an organic titanium compound, 20 to 60% by weight of one or more metal powders selected from the group of zinc powder, zinc alloy powder, and aluminum powder, and 10 to 60% by weight of an organic solvent. A coating having excellent anticorrosive properties can be formed by coating the above-mentioned paint composition followed by heating at a temperature of from 200 to 400 degrees C.

The invention relates to the field of garbage classification equipment, in particular to a classification device for plastic garbage treatment and recovery. The classification device comprises a machine body and a classification cavity located in the machine body and provided with an upward opening, moving grooves in bilateral symmetry are formed in the end wall of the upper side of the classification cavity, baffles capable of moving left and right are arranged in the moving grooves, and first electromagnets which are in bilateral symmetry and attract each other after being powered on are arranged on the outer walls of the baffles and the moving grooves. The invention provides the classification device for plastic garbage treatment and recovery. According to the classification device, the amount of harmful metal elements such as mercury in the plastic garbage is detected through a metal detector, the harmful metal elements are classified into the corresponding garbage baskets to be treated through rotation of classification wheels, the plastic without metal parts is sealed in a closed space after being crushed, nutrient solution is supplied to plastic decomposition microorganisms in the plastic at intervals through extrusion of sponge blocks, the plastic containing metal is heated and decomposed through crushing and heating and then recycled in a unified mode, and the recyclability of the device is guaranteed.

The invention provides a production method of a high-performance special aluminum alloy profile and belongs to the technical field of aluminum alloy processing. The method comprises the following steps: step 1, furnace baking; step 2, burdening/feeding, wherein raw materials are fed into a furnace according to the proportion requirement; step 3, smelting, wherein solid raw materials are subjected to homogenization heat treatment; step 4, filtering, wherein the gas content in the melt is further reduced, and non-metallic inclusions and various harmful metal impurities are reduced; and step 5, casting. According to the method, furnace baking operation is carried out according to parameters such as preset time and speed before smelting, so that the temperature of a furnace body is uniformly and slowly increased, and cracking of a furnace lining due to rapid cooling and rapid heating is avoided. In the four stages, i.e., before/during smelting, during filtering and during casting, the production process of the aluminum alloy profile is optimized and the hydrogen content is reduced to be less than 0.1 cm<3>/100g by controlling parameters such as furnace baking time, smelting temperature, casting speed/temperature, cooling speed and the like, so that cast ingot grains are refined and the performance of the alloy profile is improved.

The invention relates to a transition metal oxide material for water pollution treatment. The transition metal oxide material can remove harmful metal ions such as chromium (VI), arsenic (V), lead (I1), uranium (VI) and cadmium (I1) in water to reach the drinking water standard. Chromium (VI) and arsenic (V) can be adsorbed to 10 ppb or below, and lead (II), cadmium (II) and uranium (VI) can be adsorbed to 1 ppb or below. The general formula of the adsorbent is MxOy, wherein M is selected from one or two transition metal elements of Zr, Ti, Fe, Mn, Mo, W and the like; and 1 < = x < = 2 and 1 <= y < = 5. The material is prepared by adopting a micro-etching technology, and has the characteristics of rich pore structures, high-density hydroxyl, high specific surface area and the like throughaccurate selective etching, so that the adsorbent has strong adsorption capacity on harmful ions, and an efficient removal effect is achieved. In addition, the material has good cyclic utilization performance, the synthesis process is simple, the cost is low, and the material has a wide prospect in the aspect of water pollution treatment.

The invention belongs to the technical field of harmlessness and recycling of metallurgical and bulk industrial smelting slag waste, and discloses a harmless and reduction method of smelting slag richin fayalite. The harmless and reduction method mainly adopts a hot alkali depolymerization-diluted acid enhanced leaching process, and includes the following steps that (1) the smelting slag rich infayalite is crushed and pulverized into powder, and the smelting slag is depolymerized with a hot alkaline solution to obtain depolymerized slag; and the alkaline solution is a sodium hydroxide solution or a potassium hydroxide solution; and (2) the depolymerized slag in the step (1) is subjected to agitation leaching reaction with a mixed system of diluted acid and oxidant to obtain a leaching solution and harmless and reduced slag. The test results show that the harmless and reduction method treats copper smelting slag rich in fayalite, harmful metals in the copper smelting slag are extracted, the leaching rate of the harmful metals As and Pb in the treated copper smelting slag reaches 99.7% and 99.9%, and the reduction rate of the copper smelting slag can reach 57%.

The present invention relates to providing a treatment method capable of stabilizing harmful metals, especially lead, in waste materials, especially fly ash. It is characterized in that adding and mixing water glass and water to waste containing harmful metals and stirring.

The invention relates to the field of drinking water safety guarantee, in particular to an electric microfiltration device system for synchronously removing hardness and harmful metal in drinking water. In the electric microfiltration device system for synchronously removing the hardness and the harmful metal in the drinking water, a feed liquid pool is connected with a first pump body through a guide pipe, the first pump body is connected with a cathode chamber through a guide pipe, the cathode chamber is connected with a pressure gauge through a guide pipe, the pressure gauge is connected with a second pump body through a guide pipe, and the second pump body is connected with an anode chamber through a guide pipe; and the anode chamber is connected with the third pump body through a conduit. According to the invention, calcium carbonate is precipitated by using the strong alkaline atmosphere in the cathode chamber, the membrane surface and the membrane holes, harmful metal ions generate co-precipitation in the precipitation process, and generated insoluble crystals are synchronously intercepted by the microfiltration membrane. And the cathode effluent flows through the anode chamber to ensure that the overall effluent is neutral and reaches the drinking water standard. When the membrane flux is obviously reduced, the cathode and the anode can be reversed, and reverse water flow is applied to the membrane electrode, so the membrane flux can be completely recovered.