10 results about "Cyanide level" patented technology

The invention discloses a mechanism for detecting the content of cyanide in solid waste, and belongs to the technical field of cyanide detection.The mechanism comprises a supporting bottom plate and a cylinder installed on the upper surface of the supporting bottom plate, a shaft rod of a stirring assembly is arranged at the inner bottom end of the cylinder in a bearing penetrating mode, and a servo motor is further installed on the supporting bottom plate through a motor support; the lower end of a shaft rod on the stirring assembly is connected with the shaft end of a servo motor through a first belt transmission structure, a feeding hopper is arranged on the barrel, a reciprocating telescopic mechanism is further arranged on the barrel, and a discharging door is further arranged on the barrel. When the cyanide gas detection device is used, gas can be extruded to a detection part of the detection assembly, so that cyanide gas can be in full contact with the detection assembly, the accuracy of a detection result is improved, in addition, in the process of detecting the cyanide content, the cyanide gas can be conveyed to the treatment tank to be treated, and the detection efficiency is improved. Therefore, the energy consumption of the detection mechanism is reduced, and energy conservation and emission reduction are facilitated.

The invention provides a cyanide-containing wastewater resource recovery and cyclic utilization method, and belongs to the technical field of environmental protection and water treatment. According to the method, firstly, copper is collected through sulfuration under the weak acid condition with the pH being 5-6, so that a copper-cyanogen complex ([Cu (CN) 43-]) in wastewater is converted into a mixed material of copper sulfide (CuS) and cuprous cyanide (CuCN), and primary recovery of copper is achieved; and then, adding a pH regulator 2 to control the pH of the reaction system to be 9-11, adding a separation agent to control the ORP of the reaction system to be-400mV to-200mV, and carrying out a separation reaction. In the process, cuprous cyanide reacts with free cyanide (CN <->) to generate a soluble copper-cyanogen complex, and copper sulfide is retained, so that cuprous cyanide is accurately separated from the copper-containing material, the content of cyanide in the material is reduced, and the obtained copper-containing material meets the requirements of industrial product quality standards and pollution control standards; the problems that in the prior art, the cyanide content in the copper-containing material obtained by recycling copper from the cyanide-containing wastewater exceeds the standard, and the environmental risk is high in storage, transportation and comprehensive utilization are solved.

The application discloses a cyanide-containing slag tailing pond groundwater environment risk early warning system, a groundwater monitoring well subsystem comprises a plurality of groundwater monitoring wells; a timing sampling control subsystem is used for controlling the pumping time, flow and frequency of a water pump in each groundwater monitoring well; a color reaction subsystem comprises a color developing device and is used for monitoring the color developing reaction of the groundwater sample; a color sensing subsystem comprises a light source and a color sensor, the light source is irradiated towards the color developing device, and the color sensor is used for collecting the emergent light signal of the color developing device after the color developing reaction; a central control platform comprises an early warning subsystem and an emergency disposal response subsystem, the early warning subsystem receives the color sensor signal and divides the risk grade according to the obtained signal; the emergency disposal response subsystem executes corresponding detection and repair responses according to the risk grade made by the early warning subsystem; the application realizes the rapid detection of the cyanide content in the groundwater around the cyanide-containing slag tailing pond and the feedback and early warning of the environmental pollution risk grade.

The application belongs to the technical field of cyanide detection, and specifically relates to a method for detecting cyanide based on inherent internal standard surface-enhanced Raman scattering substrates, which comprises the following steps: S1. Preparing a cyanide standard curve: taking the cyanide concentration as the horizontal coordinate, the ratio of the peak intensity at the characteristic peak of cyanide with different concentrations to the peak intensity at the internal standard peak of a bare silver SERS chip as the vertical coordinate, establishing a linear regression equation, and obtaining the cyanide standard curve; S2. Detecting experimental precision; S3. Quantitatively detecting the cyanide content: detecting the SERS signals of the cyanide sample to be measured and the bare silver SERS chip, comparing the SERS signals with the cyanide standard curve in step S1, and obtaining the cyanide content to be measured. The inherent peak of the bare silver SERS chip is used as an internal standard reference, the curve equation of the ratio intensity of the characteristic peak of the sample to be measured to the internal standard peak of the substrate and the concentration is established, the determination coefficient R 2 Better, eliminate the deviation caused by certain systematic errors, more accurate quantification, combined with the characteristics of rapid detection of Raman spectrum, the cyanide is rapidly detected.

This invention relates to a method for preparing sulfur concentrate powder using high-silica cyanide tailings, belonging to the field of gold cyanide tailings treatment, and includes the following steps: (1) adding water to the high-silica cyanide tailings to make a slurry, quickly adjusting the pH of the slurry to 1-2, and then adding a composite cyanide removal agent under stirring and dispersion aeration conditions; (2) acidifying the aerated slurry, adding an adjuster to adjust the pH of the slurry back to 7-8; (3) adding a collector and a frother to the pretreated material and performing flotation; (4) the pyrite-containing slurry particles float with the bubbles, are scraped off by a scraper, and after being carefully selected, sulfur concentrate slurry is obtained, and after pressure filtration and drying, sulfur concentrate is obtained; (5) the slurry after scavenging flows into the tailings slurry tank, and after pressure filtration and drying, tailings are obtained. The method of this invention has a good cyanide removal effect, and the cyanide content in the treated tailings and sulfur concentrate is less than 0.5 mg / kg, reducing the hazardous characteristics of tailings to general solid waste, and realizing the complete resource utilization of waste.

The utility model discloses a cyanide measuring device which comprises a support module, a driving module, a stabilizing module and detection modules, the driving module and the stabilizing module are both installed on the support module, and the detection modules are respectively installed on the driving module and the stabilizing module. The support module comprises a bottom plate, and a driving support, a first stabilizing support and a second stabilizing support which are installed on the bottom plate. The cyanide measuring device disclosed by the utility model is linked through the bracket module, the driving module, the stabilizing module and the detecting module, so that the content of cyanide in equipment is automatically detected, and the cyanide measuring device has the advantages of stable structure, high safety, high efficiency and the like.

The invention belongs to the technical field of grain processing, and particularly relates to a method for reducing the M value in the sorghum treatment process, the M value is the sum of the content of daumatin and cyanide in sorghum, the method comprises at least one round of grain moistening operation unit, and the grain moistening operation unit comprises the steps that 1, water feeding treatment is conducted, specifically, water is fed into the sorghum, so that the sorghum is moistened; 2, carrying out oxygen isolation treatment, namely carrying out oxygen isolation treatment on the wet sorghum in an oxygen isolation environment; in the method, the total duration of the oxygen isolation treatment is 24-54 hours from the beginning of the first oxygen isolation treatment. The M value in the sorghum product is reduced by isolating oxygen in the sorghum treatment process; cyanide is controlled from the front end of sorghum treatment, and a control point is moved forwards; the M value can be greatly reduced without adding a chemical reagent, and the method is a positive exploration for effectively controlling cyanogen substances in a brewing system and edible or feed.

The invention belongs to the technical field of cyanidation leaching tanks, and particularly discloses an environment-friendly cyanidation leaching tank with a circulating system, which comprises a base, and a leaching mechanism, a preprocessing mechanism and a circulating mechanism which are fixedly mounted on the outer wall of the top of the base through bolts, an interlayer plate and a heat conduction inner layer are integrally formed in the leaching tank, and a main shaft is rotationally connected to the inner wall of the top of the leaching tank through a bearing; the problems that after cyanide and ore are added into a cyanidation leaching tank at a time, air is inflated slowly, so that the reaction of the cyanide and base metal in the ore is accelerated, a large amount of cyanide is consumed, and a solution is polluted are solved; the circulating mechanism can pump out a solution in the leaching mechanism, the pH value of the solution is detected through the pH value sensor so as to judge the content of cyanide in the solution, and then cyanide in the circulating tank is added into the solution through the dosing pipe according to needs and sent back into the leaching mechanism.

The application provides a method for treating high-cyanide coking wastewater, and belongs to the technical field of wastewater treatment. The method is that the high-cyanide coking wastewater is sequentially subjected to pretreatment, oxidation and photolysis treatment, physical and chemical treatment, biochemical treatment, resin treatment and electrolysis treatment, so that the cyanide content of the treated water is below 0.2 mg / L. The method of the application sequentially passes through six treatment procedures to treat the cyanide in the wastewater, and the cyanide content in the treated wastewater can be below 0.2 mg / L, so that the cyanide removal effect is good.

The invention relates to a method for preparing sulfur concentrate powder from high-silicon cyanidation tailings, and belongs to the field of gold cyanidation tailings treatment.The method comprises the following steps that 1, water is added into the high-silicon cyanidation tailings to prepare ore pulp, the pH of the ore pulp is rapidly adjusted to be 1-2, then a composite cyanogen removal agent is added, and stirring and dispersion aeration are carried out; (2) adding an adjusting agent into the acidified and aerated ore pulp, and adjusting the pH value of the ore pulp back to 7-8; (3) adding a collecting agent and a foaming agent into the pretreated material, and carrying out flotation; (4) ore pulp particles containing pyrite float upwards along with bubbles and are scraped out by a scraper, sulfur concentrate pulp is obtained through concentration, and sulfur concentrate is obtained after filter pressing and drying; and (5) the scavenged ore pulp flows into a tailing pulp tank, and tailings are obtained through filter pressing and drying. According to the method, the cyanide breaking effect is good, the content of cyanide in the treated tailings and sulfur concentrate is smaller than 0.5 mg / kg, the dangerous characteristic of the tailings is reduced to common solid waste, and complete recycling of the waste is achieved.