46results about How to "Less investment in building a factory" patented technology

Provided is a method for the production of lithium carbonate by applying multi-bittern-adding method, and using carbonate type bittern and sulfate type bittern( or magnesium-containing bittern) as raw material, which comprises applying the first bittern-adding step by mixing carbonate type bittern with sulfate type bittern, CO32- and Mg2+ ions in the bittern reacting with each other completely to produce basic magnesium carbonate, evaporating and concentrating the bittern, applying solid-liquid separation to remove the precipitation of basic magnesium carbonate, and to obtain lithium-enriched bittern; applying the second bittern-adding step by mixing the lithium-enriched bittern with carbonate type bittern which is evaporated and concentrated to a lithium ion saturation concentration or a concentration close to the lithium ion saturation concentration, so as to produce lithium carbonate by Li+ ion contained in the mixed bittern, applying solid-liquid separation to remove the precipitation of lithium carbonate, washing the obtained precipitation of lithium carbonate with hot water, drying, and then to obtain lithium carbonate product. The method is simple, the raw material can be easily obtained, and the yield is high.

Iron ore powder composite agglomeration process. In the present invention, the fine-grained iron concentrate is separately separated and prepared into pellets, and then mixed with coarse-grained iron-containing ore powder and other raw materials, spread on a traditional sintering machine for roasting, and is made of acidic pellets embedded in high-alkalinity sintering Composite ironmaking charge composed of ore. With the present invention, the existing iron-containing raw materials can be fully and rationally utilized; the shortcomings of poor air permeability and difficult sintering of the material layer in the sintering process of the fine-grained concentrate are overcome; Disadvantages of segregation; significantly reduce sintering energy consumption and save investment in plant construction.

The invention relates to a method for decomposing semi-hydrated phosphogypsum, which comprises the following steps of: A. suspended state preheating of the semi-hydrated phosphogypsum: adding a semi-hydrated phosphogypsum material into a suspended state preheating system, carrying out heat exchange with high-temperature smoke in a suspended state, and after dehydrating the semi-dydrated phosphogypsum, forming anhydrous phosphogypsum; B: suspended state thermal decomposition and desulfuration of the anhydrous phosphogypsum: leading the anhydrous phosphogypsum to enter a suspended state thermaldecomposition system connected with an outlet of the suspended state preheating system, simultaneously adding a reducing agent with the weight ratio of (0.01-0.4):1 to the semi-hydrated phosphogypsuminto the suspended state thermal decomposition system and finishing the high-temperature decomposing and desulfurizing process of phosphogypsum; and C. cooling of materials. The method for decomposing the semi-hydrated phosphogypsum can overcome the defects of low decomposing rate and low desulfurizing rate of CaSO4, and the like in the traditional production method and solves the problem of increasing shortage of natural lime and limestone resources while effectively utilizing a sulphur element in the phosphogypsum at high quality.

It relates to an automatic continuous doughmaker. The doughmaker which is used for processing flour dough. It comprises: upright dough mixer, main material box, auxiliary material box, the upright dough mixer, electromotor and feeding member, the gearing system and speed control eletromotor installing on the base, helical conveyers on bottoms of main material box and auxiliary material box, the feed inlet at the lower part of the upright dough mixer linked with main material feed conveyer, the feed outlet of the auxiliary material box communicating with the main material box, the water inlet in the lower part of the upright dough mixer, the feed outlet of dough mixer in the upper part, the main shaft of upright dough mixer driven by driving electromotor, helical feed conveyers of main material and auxiliary material driven by the speed control eletromotor, providing material for the next process in the noodle production line.

The invention relates to an automatic dough mixer, which is a mixing machine with vertical installation parts for dough preparation in the noodle production line, vertical dough mixer, main material box, vertical dough mixer drive motor and feeding material The speed-regulating motor driven by the transmission system of the mechanism is installed on the machine base. The outlet of the main material box on the bottom plate of the main material box is connected with the shell of the main material screw conveyor. The outlet of the main material screw conveyor is connected with the vertical and The main material inlet of the noodle machine is connected. The main shaft of the vertical noodle kneading machine is equipped with a vertical noodle kneading machine material spiral lifting device and a vertical noodle kneading machine material stirring and elevating paddle arranged in a spiral line. The vertical noodle kneading machine The lower part of the vertical kneading machine is equipped with the main material inlet and water inlet, and the vertical kneading machine is equipped with a vertical kneading machine outlet on the upper part of the vertical kneading machine. The kneaded dough enters from the bottom of the noodle kneading machine, and the kneaded dough is discharged from the top of the vertical noodle kneading machine, and is fed to the next step of the cooking machine in the noodle production line, which can realize the planar layout of the host part of the noodle production line, the installation height of the machine is low, and the investment in building the factory is small. , easy to operate, which is conducive to improving the working efficiency of the noodle production line.

The invention discloses a method for preparing a porous ceramsite filter material from slate saw mud. According to a formula, a product prepared by the method comprises the following raw materials in percentage by mass: 60 to 80 percent of slate saw mud (a dry basis), 15 to 30 percent of dry slate powder and 5 to 10 percent of kieselguhr, wherein the raw materials are mixed and stirred into spherical particles, then calcined and cooled to obtain the product. The method has the advantages of simple process and low production cost, and has great significance to resource cycling and environmental protection.

The invention relates to a method for preparing light building material ceramic particle by utilizing slate sawn mud. The product formula includes: 60-100% of slate sawn mud (containing 30% of moisture) and 0-40% of slate dry powder; and 1-2% of sodium silicate binder is additionally doped. The manufacturing processing step includes that the slate sawn mud is filtered until moisture is less than 30%, the slate sawn mud and powder material obtained by sieving crushed slate are pre-stirred into bulk particles in a dual spindle stirring machine, so as to form cue ball, when the moisture contained in the slate sawn mud is less than 15%, the slate sawn mud also can be independently stirred and broken into particles in the stirring machine, then the cue ball is fed into a ball forming mill to be sprayed with mist water, and a small amount of binder is added, so that the particle forms a spherical particle with the diameter Phi of 5-30mm by rolling, then the material ball is fed into a rotary kiln to be calcined, the calcining temperature is 1100-1200 DEG C, and calcining time is 25-40min, and the fiery material ball taken out from the kiln is cooled by adopting a monocular cooling machine. The method has simple production technology and low cost, and the prepared slate sawn mud ceramic particle has high tube pressure strength and wide application.

The invention relates to an airflow classifying and airflow drying process for coking coal. In the process, coke oven flue waste gas is taken as a drying medium, the fluidization technology is adopted for drying the coal, and simultaneously the coal is classified into several classes according to particle sizes by an airflow separation principle. A device consists of a vibrating fluidized bed main body and a classifying collection device, wherein the vibrating fluidized bed main body comprises a primary air supply device, a vibrating main box body with an air distributing plate, a sedimentation classifying section and a drying section with a secondary air inlet; and the classifying collection device completes the final collection of small-particle materials through a group of dust collection devices or several groups of duct collection devices with different structures according to different requirements of the process on the classification of the particle sizes. The airflow classifying and airflow drying process has the advantages that: energy is saved, the wastewater generated in the coking process is reduced, the environmental pollution is lightened and the production capacity of the coke oven can be improved.

The invention discloses a centrifuging-free manufacturing method of a prestressed concrete pipe pile. Compared with the currently used centrifugal forming method, the manufacturing method has the advantages that one operation of inflating an air die is added and brings great affect on the manufacturing of the whole prestressed concrete pipe pile, the investment on plant construction is reduced, and the serious noise pollution of a centrifuging machine is also solved. The manufacturing method is free of residual slurry, so that the problem of pollution of slurry can be completely solved; the quality accident caused by insufficient concrete wall thickness can be avoided, thus the yield of the product is increased, and the production cost can be effectively reduced.

A method for producing potassium sulfate from magnesium sulfate-metachloride potassium-containing brine comprises the following steps: 1, injecting the magnesium sulfate-metachloride potassium-containing brine into a sodium chloride saltern, and naturally spreading sodium chloride saltern to precipitate primary carnallite ore and secondary carnallite ore; 2, mixing and decomposing the primary carnallite, water or brackish water and a conversion mother liquor, and carrying out conversion, floatation and separation to obtain picromerite concentrate and the conversion mother liquor; 3, mixing the secondary carnallite ore, water or brackish water and the above obtained potassium mixed secondary conversion mother liquor, and carrying out decomposition, separation and washing to obtain crude potassium chloride; and 4, mixing and converting the crude potassium chloride, the picromerite and the water or brackish water. The method has the advantages of no external addition of sulfate ions, no introduction of a floatation agent in the production process of the crude potassium chloride, removal of ore milling and floatation processes, convenience in operation, easiness in control, high raw material utilization rate, no pollution, and reduction of the factory building investment by 10-20%.