32results about How to "Deactivation" patented technology

The invention relates to a beneficiation process for polymetallic sulfide ores containing secondary copper, belonging to the technical field of mineral processing. The method of the present invention is as follows: take iron powder with a particle size of 10-150 μm and prepare a 1%-10% suspension; add iron powder to the mill or stirring tank according to 0.1%-1% of the ore solid mass in the pulp Suspension, followed by the conventional flotation method to obtain the final concentrate product; the iron powder added to the mill and the mineral particles form a primary battery, so that the free copper ions in the slurry are replaced, reducing the impact of free copper ions on sphalerite The activation of pyrite and pyrite makes the difference in buoyancy between minerals larger, and the intercontainment phenomenon of concentrate products is small, thereby improving the index of mineral processing products. The method of the invention has the advantages of good flotation index, saving chemicals, simplifying the ore dressing process and the like.

The invention relates to a method for preparing liquid sodium silicate through copper and sulfide tailings. The liquid sodium silicate product is prepared with the step that the copper and sulfide tailings are graded through a whirlcone. Raw materials are wide in source, the technology is simple, energy consumption is low, practicability is high, the problem that the copper and sulfide tailings are large in emission load is relieved, waste is turned into valuable things, the purposes of reclamation and reduction of the tailings are achieved, and the method has good social benefits and economic benefits.

The invention discloses a method for eliminating copper ions in secondary copper sulphide multi-metal ore pulp solutions and belongs to the technical field of mineral processing. The method is characterized in that the beneficiation process of the method sequentially comprises the steps that raw ore is ground till monomer separation is conducted, and the ground raw ore is fed into a stirring groove; copper powder is added into the stirring groove, added with hydrochloric acid, heated and stirred; and pulp conditioning and dosing are conducted, common floatation is carried out, and concentrate products are obtained. According to the method for eliminating the copper ions in the secondary copper sulphide multi-metal ore pulp solutions, the hydrochloric acid and the copper powder react with Cu2+; a coordination compound [CuCl2]-, capable of stably staying in a water solution, of Cu(I) can be generated; and the Cu2+ is removed before floatation operation is conducted, sphalerites, pyrites, magnetic pyrites and other sulfide minerals are prevented from being activated through the ion Cu2+, and good beneficiation indexes can be acquired through the common floatation process. The method for eliminating the copper ions in the secondary copper sulphide multi-metal ore pulp solutions has the advantages of being good in beneficiation index, capable of saving medicaments and the like.

The invention relates to a method for ore dressing, in particular to a method for the ore dressing of a copper-lead-zinc poly-metallic sulfide ore. The method consists of crude ore dressing, ore grinding, copper-lead bulk flotation, copper-lead separation and zinc flotation, wherein in the process of the copper-lead bulk flotation, ore dressing reagents BP, No.25 aerofloat and ethylic-butyl xanthate are adopted as collecting agents for copper and lead ores, and zinc sulfate, sodium carbonate and sodium sulfide are adopted as inhibitors for zinc ores; and in the process of the copper-lead separation, active carbon is adopted to perform reagent removal, sodium sulfite, CMC and water glass are adopted as the inhibitors for lead ores, and No.Z-200 as the collecting agent for copper ores. The method has good metallic mineral separation effect and high metal recovery rate, is simple, is easy to operate, and is suitable for popularization and application.

The invention discloses a combined inhibitor and a separation method for separating copper sulfide ore containing kaolin. The combined inhibitor includes sodium percarbonate and lignoxanthate in a mass ratio of (70.0-95.0):(5.0-30.0). The separation method of the present invention is aimed at the copper sulfide ore containing kaolin, by adding polyacrylate to inhibit the kaolin in two stages, and the copper-sulfur mixed flotation obtains the copper-sulfur mixed concentrate; for the copper-sulfur mixed concentrate, the combined inhibitor and The form of lime combination inhibits the flotation of copper minerals from pyrite, achieves the separation of copper and sulfur under low alkalinity, and achieves the purpose of obtaining better technical indicators.

The invention provides a method for comprehensively recovering gold, antimony and lead from flotation tailings, belonging to the technical field of resource comprehensive utilization. The method first removes the slime in the flotation tailings by gravity, then grinds the gravity concentrate and carries out mixed flotation of gold, antimony and lead, and then grinds the concentrate of mixed flotation to suppress antimony and float gold and lead The obtained concentrate is subjected to gold-lead separation flotation, and the obtained tailings are subjected to activated antimony separation to finally obtain gold concentrate, lead concentrate and antimony concentrate. This method pre-enriches coarse-grained minerals through the gravity-selection open-circuit process, throws away a large amount of slime in the flotation tailings, and avoids the adverse effect of the sludge on the subsequent flotation; the mixed flotation full-open-circuit process is beneficial to The continuous body enters the concentrate, which greatly improves the recovery rate of gold, antimony and lead, and at the same time prevents the secondary slime formed by grinding from entering the concentrate. This method has important economic value and environmental protection for the reuse of flotation tailings. benefit.

The invention refers to a process for the production of 2,3,3,3-tetrafluoropropene carried out starting from a starting composition comprising the stages of bringing the starting composition into contact, in the presence of a catalyst, with HF in order to produce a composition A comprising 2,3,3,3-tetrafluoropropene (HFO-1234yf), intermediate products B consisting of 2-chloro-3,3,3-trifluoropropene (HCFO-1233xf), 1,1,1,2,2-pentafluoropropane (HFC-245cb), and byproducts C consisting of E-1-chloro-3,3,3-trifluoro-1-propene (HCFO-1233zdE), trans-1,3,3,3-tetrafluoro-1-propene (HFO-1234zeE) and 1,1,1,3,3-pentafluoropropane (HFC-245fa); recovery of said composition A and purification of the latter in order to form and recover a first gas stream G1 comprising HCl, 2,3,3,3-tetrafluoropropene (HFO-1234yf), a part of the unreacted HF, a part of the intermediate products B and a part of the byproducts C; and a stream, which is preferably liquid, L1 comprising a part of the unreacted HF, a part of the intermediate products B and a part of the byproducts C.

The invention relates to a method for flotation separation of copper pyrites and arsenopyrite in copper rough concentrate, and belongs to the technical field of mineral processing. The mass percent concentration and pH of pulp of the copper rough concentrate are regulated, Na2S2O3, NH4Cl and CuSO4 are sequentially added to conduct conventional flotation to obtain a rough concentrate product, and the rough concentrate product is subjected to multiple times of concentration to obtain a final rough concentrate product. The method effectively eliminates the activation effect of copper ions to arsenopyrite, an AsO4NH4Cu-6H2O hydrophilic film generated after reaction prevent xanthic acid from being adsorbed on the surface of arsenopyrite. Meanwhile, a copper sulfide film is generated on the surface of copper pyrites, adsorption of xanthic acid on the surface of the copper pyrites is promoted, the hydrophobicity of the copper pyrites is improved, and thus the floatability difference between the copper pyrites and the arsenopyrite is improved.

One for SO removal at higher temperature 2 The preparation method of the catalyst is to formulate metal salts into a 1-20wt% aqueous solution, mix 1g of activated carbon fiber with 2ml of the aforementioned aqueous solution, leave it at room temperature for 12 hours, and take out the activated carbon fiber loaded with salts. After drying at room temperature, dry overnight at 120°C. Put 0.1g-2g of activated carbon fibers loaded with metal salts in the reaction furnace, and then raise the temperature of the furnace to 50-80°C, the SO 2 , O 2 and water vapor N 2 into the reaction furnace for SO 2 removal. The invention is simple to prepare and easy to operate, and the loaded metal salts can remove SO in the flue gas with high activity at a relatively high temperature such as 50-80°C without any treatment 2 , which has the advantage of low preparation cost.