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

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 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.

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.