40results about How to "High iron removal rate" patented technology

The invention discloses a system for circularly grinding and deironing reclaimed rubber. The system has the beneficial effects that firstly, tires coarsely ground into blocks are firstly ground into coarser particles by a rubber coarse grinder, and then magnetic separation is carried out; compared with existing systems for directly grinding rubber into powder and then carrying out magnetic separation, the system has the advantages that steel wires are not completely ground into iron powder, the magnetic separation efficiency is high, and the iron removal rate is high; secondly, the coarse particles are subjected to magnetic separation in full-magnetic rollers before reaching a rubber powder grinder, the rubber particles containing iron are completely removed, and the rubber containing iron can return to the rubber coarse grinder to be ground. Therefore, through two-time magnetic separation in the full-magnetic rollers, the steel wire removal rate can be more than 99%. The system greatly reduces the content of iron powder in a finished rubber powder product and has high production efficiency.

The invention discloses a method for producing a middle supernatant by carrying out two-step pressure acid leaching on high-iron zinc sulfide concentrate, comprising the following steps: one-step pressure acid leaching: mixing and matching the high-iron zinc sulfide concentrate and the leached residue generated in the two-step pressure acid leaching; adding into a size mixing groove for mixing size; adding a proper amount of surfactant lignin; pumping the surfactant lignin and dilute sulphuric acid into a pressurizing kettle; controlling the temperature of the kettle; introducing industrial pure oxygen into the pressurizing kettle; controlling the pressure of the kettle; controlling the final concentration of the sulfuric acid to be 0.2-0.36mol / L in an ore pulp after the one-step pressureleaching; and filter pressing to obtain a supernatant as leaching agent of the two-step pressure leaching; two-step pressure acid leaching: pumping the high-iron zinc sulfide concentrate and the surfactant obtained in the one-step pressure acid leaching into the pressurizing kettle; controlling the temperature, introducing the industrial pure oxygen into the pressurizing kettle; controlling the pressure; and controlling the final pH value to be 4.8-5.2 in the ore pulp after the two-step pressure acid leaching to obtain middle supernatant of which the leachate contains more than or equal to 20mg / l of Fe for follow-up purifying and removing impurities, and the obtained leaching residue is returned to the one-step pressure acid leaching procedure.

The invention discloses a production device of rubber powder. Tires which are cut into blocks by coarse crushing are firstly ground into coarse particles by a rubber coarse crusher, and then magnetic separation is carried out on the coarse particles. Compared with an existing device which directly grinds the rubber into powder before magnetic separation, the production device of the rubber powder is capable of grinding a steel wire which is incompletely ground into powder, so that the magnetic separation efficiency is high, and iron removal rate is high. Furthermore, before reaching the rubber crusher, the coarse particles are subjected to magnetic separation through an all-magnetic drum, so that the iron-containing rubber particles are thoroughly removed and can return to the rubber coarse crusher to be crushed. After the magnetic separation is carried out by the all-magnetic drum for twice, the steel wire removal rate reaches up to more than 99%. After the rubber particles are ground into the rubber powder in the next step, little iron powder in the rubber powder is removed by an iron powder collection box, so that the content of the iron powder in the finished rubber powder product is greatly reduced, and the production efficiency is high. An elastic part in a second movable screen is replaced by a swing type structure formed by a swing arm and a portal frame, so that the screening efficiency is high, and the service life is greatly prolonged.

The invention discloses a device and a process of removing iron and silicon phases in a primary aluminum-silicon alloy by means of a one-step method. The process comprises the following steps: adopting a metal element manganese as an iron removing agent under the action of an alternating electromagnetic field; mixing the iron removing agent with a primary aluminum-silicon alloy raw material uniformly; heating and melting the mixture, wherein the silicon phase and the iron-enriched phase are solidified and enriched in the bottom under the joint action of a magnetic field force and temperature effect after cooling; pouring the melt in the upper portion; carrying out cooling and solidification on the melt to obtain a casting aluminum-silicon alloy meting the industrial standards; and finally,re-melting the primary silicon phase and the impure iron phase in the bottom to obtain a bottom alloy melt. Compared with a conventional natural precipitation method, the iron removal rate which is only 60% or above, the process disclosed by the invention is simple and rapid in flow of preparing the casting aluminum-silicon alloy, energy-saving and environment-friendly and low in production cost;the iron removal rate reaches up to 92%; and the silicon content of the obtained product is as small as 13% or below and the iron content of the obtained product is as small as 0.39% or below.

A method for removing metal impurities in hydrocarbon raw materials, the method comprises contacting the hydrocarbon raw materials containing metal impurities with a metal removal agent, wherein the metal removal agent contains organic carboxylic acid and organic phosphonic acid. Because the method provided by the invention contains organic carboxylic acid and organic phosphonic acid, it can effectively remove the iron element in the hydrocarbon raw material, and the iron removal rate is as high as 95%. The demetallization method provided by the invention also has the advantages of low cost, readily available raw materials and simple operation, and can effectively remove various metal impurity elements. In addition, since the demetallization agent used in the present invention does not contain nitrogen, sulfur, chlorine, or metal elements, it will not cause harm to subsequent treatment processes such as catalytic hydrogenation.

The invention provides a hydrogenation system for an iron containing hydrocarbon raw material and a method thereof. The hydrogenation system comprises a pretreatment reaction zone, a first gas-liquidseparation zone, a main reaction zone and a second gas-liquid separation zone, wherein the interior of the pretreatment reaction zone is provided with at least one fixed bed reactor; the interior of the fixed bed reactor along a material flowing direction is successively filled with at least one hydrogenation protective agent and at least one first hydrodemetallization agent; the interior of the main reaction zone is provided with at least one fixed bed reactor; and the interior of the fixed bed reaction along a material flowing direction is successively filled with at least one second hydrodemetallization agent and at least one hydrodesulfurization agent. The system provided by the invention has high iron tolerant capacity and iron intercepting capacity in the pretreatment reaction zone,and overcomes the problem of insufficient capacity of intercepting an iron containing compound during long-period operation of the pretreatment reaction zone in the prior art.

The invention discloses a regenerated rubber powder production device. The regenerated rubber powder production device is characterized in that tyre blocks formed through rough crushing of a tyre are crushed into coarse particles through a rubber coarse crushing pulverizer firstly, and the coarse particles are subjected to magnetic separation. Compared with the method that rubber is crushed into powder are then subjected to magnetic separation, a mode adopted by the device has the advantages that a steel wire is not fully smashed into iron powder, the efficiency of magnetic separation is high, and the iron removing ratio is high; before the coarse particles are delivered to a rubber powder crushing pulverizer, the coarse particles are subjected to the magnetic separation through an all-magnetic roller, so that iron-containing rubber particles are completely removed, and the iron-containing rubber can be crushed by the rubber coarse crushing pulverizer, therefore, through two-time coarse crushing pulverizer by the all-magnetic roller, the removing ratio of steel wire can reach above 99%, consequently, the content of iron powder is finished rubber powder is greatly reduced, and the production efficiency is high; an elastic part of a second moving sieve is replaced by an oscillating structure which is composed of an oscillating arm and a door-shaped frame, so that the screening efficiency is high, and the service life is greatly prolonged.

The invention relates to an electromechanical integration powerful electromagnetic iron removing machine which has compact and reasonable structure and high electromagnetic intensity and ensures that the iron removing separation fine powder grade can meet standard requirements. The powerful electromagnetic iron removing machine consists of a base, a shell, a motor, a coil, a magnetic pole, a magnetic tube, a tube, a vibrator, a cooler, a feed port, a discharge port, an iron discharge port, a feed back port and electromagnetic valves. A magnetic pole net is excited by heavy direct current. Thepowerful electromagnetic iron removing machine is controlled by a PLC, and the electromagnetic valves are connected to corresponding pipelines respectively. The powerful electromagnetic iron removingmachine is used for the iron removal and purification of wet potassium feldspar powder, natrium feldspar powder, lithium feldspar powder, kaolin powder, figuline slurry, quartz sand powder and glaze.