34results about How to "Reduce the amount of slurry" patented technology

The invention relates to a technological method for a drilling fluid solid control circulation system, in particular to a technological method for the treatment of drilling fluid produced during oil and gas drilling. The technological method for the drilling fluid solid control circulation system adopts the following device components: a special concentration treatment device I, a special centrifugal machine, an oil field mud pump I, a special cyclone set I, a special concentration treatment device II, an oil field mud pump II, a special cyclone set II, a special concentration treatment device III, an oil field mud pump III, a storage box, an oil field mud pump IV, a special filter press (or a special stacked spirals), a solid-phase mud cake collection barrel (or a mud transfer tank), and a circulating fluid storage tank. The technological method for the drilling fluid solid control circulation system has the following benefits: desanding, mud removal, destabilization and gel breaking in a circulating and classification manner are achieved through the two-stage special cyclone sets, so that the classifying effect is remarkable; circulating concentration is achieved through the three-stage special concentration treatment devices, so that the concentration effect is remarkable; the treated drilling fluid is recycled; treated solid-phase mud cakes or highly-concentrated mud are / is directly transported away.

The invention discloses a sizing method for high-strength and high-modulus silicon carbide fibers. The sizing agent is prepared as follows: deionized water, epoxy resin slurry and hydrophilic softener are mixed in a mass ratio of 26-28:4-6 : 1-3 mix and stir evenly to obtain sizing agent; pre-drying: turn on the oven, and raise the temperature to 100 ℃ ~ 130 ℃; sizing: wind the silicon carbide fiber on the yarn bobbin, enter the sizing agent through the sizing roller, and remove the sizing agent The silicon carbide fiber is poured into the sizing tank for sizing treatment to obtain the sizing fiber; after drying the sizing fiber in the oven, the sizing fiber is wound on the yarn winding drum through the tension controller and the guide roller. It solves the problems existing in the prior art that the silicon carbide fibers are prone to hairiness and breakage during the sizing process, and the sizing agent is not suitable.

The invention discloses a construction method for pouring concrete through the back of a steel pipe. The technical scheme includes preparation work, pouring of the first-stage concrete, pouring of the second-stage concrete, grouting construction and anti-corrosion treatment. Install exhaust pipes and grouting pipes on the top of the annular layer that penetrates the steel pipe and concrete pipe, and build walls at both ends of the annular layer to seal. A plurality of ash filling ports are opened at the top of the pierced steel pipe. The pouring pipe is connected with the ash pouring port, and the first stage concrete is poured; when the height of the concrete is close to the middle height of the pierced steel pipe, the pouring pipe is moved to the next ash pouring port, and the pouring steps are repeated. Install the pouring pipe again and start pouring the second stage concrete. When the next ash pouring port is evenly and stably leaking grout, stop pouring, the pouring pipe moves to the next ash pouring port, and the pouring ash pouring port is permanently blocked. Inject grout into the grouting pipe to fill the top cavity. Carry out anti-corrosion treatment on the ash filling port. The invention has the advantages of making poured self-tight concrete more plump and reducing the amount of grouting.

The invention discloses a recycled concrete and a preparation method thereof, and relates to the technical field of concrete. Its technical points are: its raw materials include the following components in parts by weight: cement 280-300 kg / m 3 ; fly ash 70‑90 kg / m 3 ; sand 800‑820 kg / m 3 ;Glaze modified recycled coarse aggregate 790‑810 kg / m 3 ;Natural gravel 190‑210 kg / m 3 ;Admixture 8‑10 kg / m 3 ; water 155‑165k kg / m 3 . The recycled concrete in the invention has the advantages of improving the slump and mechanical strength of the recycled concrete.

The invention provides a method for preparing a manganese sulfate electrolyte by leaching pyrolusite through sulfur dioxide. According to the main concept, the method comprises the steps that only a part of an anolyte and whole-process pyrolusite are used for preparing a fluid, and after the fluid reacts with the sulfur dioxide, a high-concentration manganese sulfate solution is obtained; after the other part of the anolyte is neutralized and subjected to liquid-solid separation, a low-concentration manganese sulfate solution with the manganese sulfate concentration being identical to that ofthe prior anolyte is obtained; and the two manganese sulfate solutions are blended to obtain the qualified electrolyte with the manganese sulfate concentration meeting electrolysis requirements. By adopting the method, the utilization efficiency of the sulfur dioxide and the pyrolusite in the leaching process can be improved, and the capital construction cost and operation cost of a leaching technology and a leachate impurity removing technology are lowered.

The invention discloses a dual-circulation absorption tower. The tower comprises a front absorption tower and a main absorption tower. A flue gas channel between the towers is arranged between a second flue gas outlet of the front absorption tower and a first flue gas inlet of the main absorption tower. A circulating pump for pumping out the slurry in a slurry pond is respectively arranged on the main absorption tower and the front absorption tower. An outlet tube of the circulating pump is connected to a spray layer. A forced oxidation device for forced oxidation of the slurry in a first slurry pond is not arranged on the main absorption tower, while the forced oxidation device for forced oxidation of the slurry in a second slurry pond is arranged on the front absorption. The dual-circulation absorption tower also comprises a slurry pump for discharging the product generated by the main absorption tower into the slurry pond of the front absorption tower. The inventive dual-circulation absorption tower has simple structure and low cost, can realize a SO2 removal efficiency more than 95% only through a two-step method without increasing the circulating pump number or the chemical additive used amount.

The invention discloses a method for effectively improving the mineral processing efficiency of wolframite. The method comprises the following steps: after raw ores of the wolframite are crushed, the wolframine and impurities are fully separated through the flow of multistage grinding-size grading-strong magnetic separation; and the wolframite is enriched in quantity by a high gradient magnetic separator before being floated, so that the separation of the wolframite and the impurities is realized, tailings of the wolframite is discarded in quantity before the wolframite is floated, and efficiency of the technological process is further improved. The method has the following main characteristics that (1) the flow of multistage grinding and size grading creates conditions for the strong magnetic enrichment and the tailing discarding operation; (2) the mineral processing process is improved, and the flotation feeding index is enhanced; (3) the flotation reagent dosage and the production cost are reduced, and the efficiency of the whole technological process is improved; and (4) the full dissociation and the beforehand tailing discarding of minerals are realized through the novel process, so that the flotation flow is simplified, the efficiency of the whole technological process and the wolframite mineral processing index are enhanced, and the comprehensive utilization ratio of resources is improved.

A kind of asynchronous co-separation process of poor and difficult nickel-copper ore of the present invention adopts cyclone centrifugal separation ore dressing technology, and selects a part of nickel in advance in the grinding circuit before flotation of low-grade poor and difficult separation copper-nickel sulfide ore The gangue and metal minerals with low copper content, fine particle size and meeting the conditions of the second-stage flotation are allowed to directly enter the second-stage flotation, so as to improve the recovery rate of nickel-copper metal and the quality of the concentrate. The present invention applies the process of pre-grading grinding products by centrifugal gravity beneficiation equipment to the ore grinding circuit of the copper-nickel ore beneficiation process. The invention can improve and enhance the flotation operation efficiency of each stage, reduce process energy consumption, achieve the purpose of improving the final copper-nickel separation index, and is economical, applicable, simple and has good beneficiation effect.

The present invention is fiber strand aggregating device for air slide, and its novel design is its aggregating roller with new splitting guide flute and porous aggregating flute. It is installed between the front jaw and the spinning section in the drawing area of spinnin frame, and the air slide fiber strand aggregating device and the front roller form one fiber jaw. By means of the additional aggregating air flows, one flow field for fiber inside the guide flute and the aggregating flute is provided. By means of splitting and guide of the guide flute and the aggregating flute and the aggregation of fiber strand in the aggregating flute, the fiber strand is twisted closely in the aggregating flute. The yarn of the present invention has improved axial parallel degree, decreased hairy feather amount outside the yarn and raised yarn strength.