47results about How to "Improve grade rate" patented technology

The invention discloses a selective zinc oxide leaching and weak acidic zinc sulfide flotation smelting and selection combining process. For oxygen and sulfide mixed lead zinc ore, a zinc wet-method smelting process and a zinc flotation process are combined, zinc oxide in the ore is partially and selectively leached out by the first wet-method smelting process, and then zinc sulfide in the ore is floated out by the flotation process. In order to overcome the difficulty in treating the oxygen and sulfide mixed lead zinc ore, the invention provides the smelting and selection combining process which is short in process flow, reliable in technology, easy to operate and control, relatively low in material consumption and energy consumption for production, high in metal reclaiming efficiency, relatively good in economic benefit and high in practicability, the recovery of lead and zinc in the low-grade complex difficultly-selected oxygen and sulfide mixed lead zinc ore can be greatly improved, and the total recovery of lead and zinc can be up to over 90 percent.

The invention discloses a cleaning treatment process for cowhide, which orderly comprises process steps of soaking, liming, reliming, non-ammonium deliming softening and so on. The process is mainly characterized in that: soaking enzyme is mainly adopted in the step of the soaking, which greatly reduces the use level of a surfactant and the content of COD and BOD. Compared with the prior hair burning method, the liming and the reliming are characterized in that: a hair-saving liming process changes the process thought; the liming expansion is performed after hair saving and hair filtration, which reduces the content of ammonia nitrogen, the COD, the BOD and solid waste in wastewater. And waste liquid after the liming realizes recycling and achieves zero discharge. A non-ammonium deliming softening system is adopted, which reduces the content of the ammonia nitrogen in the wastewater. The use level and the discharge of sulfide and lime which are used to produce leather by the cowhide are reduced by 50 percent or so, an ammonium salt deliming process is saved, the content of the ammonia nitrogen is reduced by more than 90 percent, and the COD and suspended substances are reduced by more than 85 percent.

The invention provides a full grain leather polishing mending cream, which comprises the following components in mass percent: 2-20% of thermal expansion hollow microspheres, 10-30% of modified protein adhesive, 10-30% of fischer tropsch wax emulsion, 1-10% of silicon resin emulsion, 0.1-2% of thickener, 0.1-2% of preservative, 10-30% of water, and 15-45% of multiple curable aqueous hyperbranched polyurethane inorganic nanometer material hybrid coating agent. The invention uses the multiple curable aqueous hyperbranched polyurethane inorganic nanometer material hybrid coating agent which has high cushion resistance performance and is suitable for polishing. At the same time, silicon resin with cushion resistance and smoothness and high melting point wax is added to improve the polishing property of the mending cream greatly. By applying the full grain leather polishing mending cream provided by the invention to the slight mending of full grain leather, brush complement and polishing of coarser grain can greatly improve the rate of finished leather and added value, and increase the economic benefit of enterprise.

The invention discloses a method for manufacturing back-coated skin-imitated synthetic leather. The method comprises: coating wet-process PU slurry onto the surface of base cloth to form a base green body; after solidifying and washing the base green body, coating foaming slurry on the back of the base green body; washing and drying the base green body and foaming the base green body to form wet-process crust leather; and finally grinding the back of the wet-process crust leather and carrying out dry-process release paper pattern transfer to the front of the wet-process crust leather, wherein the foaming slurry comprises foaming resin ST-1030 or ST-1040, dimethylformamide (DMF), a foaming agent and so on. The method uses the prior synthesis device and research on special foaming slurry to carry out once forming process of the skin-imitated synthetic leather, namely, the method simplifies the prior post processing processes for producing skin-imitated synthetic leather such as pile coating, real leather powder coating and suede foaming into a wet-process once forming process.

The invention discloses a production technology of an embossed blanket product for improving the grade and class rate of a blanket. The product comprises a blanket bottom surface which is different in patterns consisting of a concave surface and a convex surface; the production technology comprises the steps: a half-finished blanket is conducted with adjustment of printing, and then put into an embossing machine to form an embossed blanket product by heating and embossing for certain time duration. A special device comprises that: the both sides of an upper machine frame and a lower machine frame are provided with an oil tank; a large sheet is arranged on the upper machine frame; tools with different dimensions are arranged under the large sheet; the interior of the large sheet is provided with an electric heating tube above which is provided with a thermal-insulating layer; and the upper machine frame is provided with a reinforcing rib. The production technology has the advantages that: the fuzzy appearing of the surface of the blanket product can be changed, defects of little spots and colorization on the surface of the blanket can be overcome so as to form natural beautiful elegant embossed patterns, improve the luxurious and aesthetic degrees of the blanket product, further increase the class of the blanket products and create economic value.

The invention discloses a magnesium refining method, and the magnesium refining method includes contact of a melted magnesium material and titanium tetrachloride and then standing, and is characterized in that the contact temperature is 750-850 DEG C. The invention also provides a titanium sponge preparation method which is characterized by comprising refining of the melted magnesium material and contact of the refined melted magnesium material with titanium tetrachloride under technical conditions of magnesiothermy reduction production of sponge titanium, and a method for refining of the melted magnesium material is the magnesium refining method provided by the invention. By using the magnesium refining method provided by the invention, high purity magnesium can be obtained, and by using titanium sponge preparation method for production of the sponge titanium, a sponge titanium product with high qualification rate and high grade rate can be obtained.

This invention relates to a production method for high SiMnSi by an external furnace method including 1, preparing materials: crusing FeSi powder into the size of 0-10mm, taking Mn slags from a solution with 18-20%Mn and 1.0-1.2 alkali to be put standby under 1480-1510deg.C, 2, inpouring the FeSi and the Mn slags into a waving bag in the proportion of 1:6-9, starting the bag for 9-17 minutes and keeping still for 9-12 minutes then raking up slags to be cast and arranged then to be sent to the storeroom.

The invention relates to a radiating method in a sponge titanium producing process by a magnesium method, comprising the following steps: a radiating device is arranged on a large cover of a reactor,and cooling media are continuously led into the radiating device in a reducing process to radiate in the large cover of the reactor. By using the method, when sponge titanium is reduced, because a reaction liquid level has high temperature (generally about 950 DEG C), heat directly radiates on the large cover of the reactor by heat radiation, the temperature of the large cover of the reactor quickly rises, the cooling media are continuously led into a cooling medium inlet of the radiating device and flow out of a cooling medium outlet, thereby realizing effective heat exchange and achieving the radiating effect of the radiating process in the sponge titanium production.

The invention discloses a method for preparing a high-silicon silicon-manganese alloy. According to the embodiment of the invention, a manganese-containing raw material is subjected to primary smelting to obtain a liquid-state non-standard manganese-silicon alloy; a silicon-containing raw material is subjected to secondary smelting to obtain a liquid-state silicon mixture, wherein in the secondary smelting, graphite carbon rods are used for fluxing; and the liquid-state non-standard manganese-silicon alloy and the liquid-state silicon mixture are subjected to alloying treatment to obtain the high-silicon silicon-manganese alloy. By using the method disclosed by the invention for producing the high-silicon silicon-manganese alloy, the coke consumption is low, the electricity consumption is low, the cost is remarkably reduced, and the obtained high-silicon silicon-manganese alloy is high in grade and product competitiveness; and moreover, by using the graphite carbon rods for fluxing during a smelting process, the smelting time is remarkably reduced, and the production energy consumption is further reduced.

The invention provides a recovery system for metal in slag of a high-carbon ferro-chrome electric furnace, and relates to a slag separation and recovery system suitable for large and medium-sized high-carbon ferro-chrome electric furnace industries. The recovery system for metal in slag of the high-carbon ferro-chrome electric furnace comprises a conveyor, a jaw crusher, a double-layer vibrating sieve, a cone crusher, a three-layer washing sieve, a tailing dry-discharging and dewatering sieve, a magnetic separator, a slag bin, a metal bin, a sawtooth wave jigger, a rod mill and a ball press machine. The recovery system for metal in slag of the high-carbon ferro-chrome electric furnace has the characteristics of being novel in structure, easy and convenient to machine, small in occupied area, capable of relieving labor intensity, high in production efficiency, capable of reducing labor cost and being matched with environmental protection facilities and the like, and thus is a novel recovery system for metal in slag of the high-carbon ferro-chrome electric furnace which is economical and practical.

The invention discloses a method for increasing quality of cathode silver power, aiming to solve the problem that the copper impurity in the cathode silver power exceeds standard. The method comprises the following steps: preparing cathode silver power by controlling the compositions of electrolyte to comprise 90-120g/l of Ag, 8-10g/l of HNO3 and less than 35-60g/l of Cu, and using 20-28g/l of dilute nitric acid to dissolve, soak and rinse the cathode silver power when the copper content in the electrolyte is more than 35g/l, wherein the soaking temperature is 40-50 DEG C, the soaking time is 2h, and the rinsing temperature is 80-90 DEG C. By using the method of the invention, the cost of the 1# cathode silver is reduced and the mass of the product silver ingot is increased. The method has the advantages of low operating intensity, simple equipment, low production cost, capability of not changing the original processing equipment, and the like.

The invention provides a method for washing an electrolytic manganese polar plate. The method comprises the following steps: putting a passivated electrolytic manganese polar plate into an ultrasonic washing groove; putting the electrolytic manganese polar plate into a water washing groove to be washed by clean water; conveying the electrolytic manganese polar plate into an air drying groove to be aired; drying in a drying oven and blowing in an air blowing groove by strong air; conveying the electrolytic manganese polar plate into a stripping region to be finished; putting the stripped electrolytic manganese polar plate into an anode liquid immersion groove to be immersed and then putting into a plate washing groove to be activated by a plate washing solution; conveying the electrolytic manganese polar plate into the ultrasonic washing groove to be washed by the clean water and putting into the water washing groove to be washed by the clean water; and finally, conveying the electrolytic manganese polar plate into the air drying groove to be aired by the strong air and conveying the electrolytic manganese polar plate into a plate reserving region for later use. The method has the advantages that the method is simple and easy to operate; impurities on the surfaces of the electrolytic manganese polar plate and the stripped polar plate are removed effectively and the washing effect is good; the electrolytic manganese polar plate does not need to be washed by a lot of industrial water to realize water saving, energy conservation and environmental protection; the grade rate of a product is also improved and the grade rate of a C-grade product can be up to 60%-63%; the washing effect is good, the falling of an electrolytic manganese sheet is reduced to the greatest extent and the yield of the product is improved.