52results about How to "Small scale of production" patented technology

The invention discloses an inkless ecological hot baking printing method and a printing head device. Ordinary printing paper is used, a printing head and the paper adopts either a direct contact mode or a non-direct contact mode. The inkless ecological hot baking printing method and the printing head device are characterized in that a heating element is arranged on the printing head, the color ofthe surface layer of the printing paper is changed through the heat energy of the printing head, so characters or patterns are formed. During the direct contact, the temperature of the printing head is set into 100 to 1000 DEG C, the stop time of the printing head is 0.1 to 100 ms, during the non-direct contact, the temperature of the printing head is set into 200 to 1000 DEG C, and the stop timeof the printing head is 0.1 to 100 ms. Ink powder or ink or paint is not needed, the printing effect can be reached through hot baking by only adopting the single ordinary printing paper, and good low-carbon energy-saving effects and social benefits are realized.

The invention relates to a method for extracting metallic thallium from thallium-containing slag, and belongs to the vacuum metallurgy technology field. The thallium-containing slag is adopted to extract the metallic thallium in a vacuum firing furnace based on three-step distillation; the vacuum degree is control between 8 to 40Pa, and the time is 30 to 60 minutes; three-step distillation temperatures respectively range from 450 to 600 DEG C, from 900 to 1100 DEG C, and from 700 to 850 DEG C; the purity quotient of the thallium which is extracted in the vacuum firing furnace can reach more than 99.9 percent; the coefficient of recovery of the thallium can reach more than 90 percent.

A process for preparing ammonium polyphosphate includes such steps as proportionally mixing polyphosphoric acid with the condensating agent chosen from urea, ammonium dicarbonate, melamine, bicynoamine, ammonium sulfate and their mixture, and reacting at 100-500 deg.C under 0.01-0.35 MPa for 5-210 min.

The invention belongs to the technical field of metallurgy, and particularly relates to a method for slagging steelmaking by side blowing of powder particle limestone in a top-bottom combined blown converter. The method of the invention comprises the following steps: arranging at least one side blowing spray gun at one side of a converter trunnion center line, wherein the installation site of the side blowing spray gun is located between a molten pool liquid level and a level 500 mm below the liquid level, an angle between the installation range of the side blowing spray gun and the installation site tangent plane is 10 degrees-75 degrees, the side blowing direction of the spray gun is that the included angle between the side blowing spray gun center line and a horizontal line is 10 degrees-60 degrees, the spray gun faces the bottom of the molten pool, the insertion depth of the side blowing spray gun is 0.1-0.6 times larger than the radius of the molten pool; blowing powder particle limestone with carrier gas through a center pipe of the spray gun by using the side blowing spray gun, blowing protective gas around the circular seam. The method of the invention directly sprays powder particle limestone into the molten pool through the side blowing spray gun; the limestone rapidly decomposes and rapidly participates in slagging reactions; limestone taken away by converter furnace gas is reduced; dust is minimized; and the utilization rate of limestone is improved.

The invention discloses a method for producing electrolytic nickel by leaching chemically precipitated nickel sulfide with pure oxygen, comprising the following steps: mixing and pulpifying chemically precipitated nickel sulfide and high pressure leachate based on the mass ratio of (8-10):1, performing one-stage atmospheric pressure leaching on the pulpified material, removing impurities from one-stage leachate and electrolyzing, producing electrolytic nickel and anolyte, mixing one-stage leached residue with anolyte for secondary pulpifying, further leaching by two-stage high pressure, and returning the obtained leached filtrate to one-stage pulpifying for utilization. The process technique has widely utilized resources, simple technical route, small investment, low energy consumption, no environment pollution, high leaching rate of nickel and cobalt, simple and convenient operation and low production cost, and provides an effective and economical way for producing electrolytic nickel in nickel sulfide concentrates.

The invention relates to a low energy consumption clean paper pulp extracting method and a papermaking process thereof, solving the problems that fibrous raw materials need to be boiled at high temperature and pressure in the pulp preparing and papermaking processes and chemical solutions produce a large quantity of black or red liquid in the pulp preparing and papermaking processes to cause great waste to resources and great pollution to the environment in the prior art. The invention adopts the following technical scheme: the low energy consumption clean paper pulp extracting method is realized by removing impurities from biomass raw materials rich of fiber, crushing, softening and soaking, separating organic matters, grinding and pulping, wherein a softening and soaking solution contains the following components in percent by weight: 10-20 sodium oxide, 3-5 sodium carbonate, 0.5-2.5 penetrating agent T, 0.5 magnesium oxide and 0.05-0.15 chelating agent EDTA. The papermaking processmatched with the method comprises the following steps: getting materials ready, rubbing to devillicate, soaking to react, separating liquid medicine, spirally squeezing pulp, refining with high consistency, removing slag, coarsely screening and making paper. The pulp preparing process has simple course, no high requirements on environment and equipment condition, easily popularized technology, norequirement on the scale of production, low costs for building production lines and purchasing equipment and less running expense.