87results about How to "Reduce pulping costs" patented technology

The invention provides a device and method for preparing light alloy semi-solid slurry through air-cooling multi-tube stirring. The device comprises a crucible for containing light alloy melt, an air-cooling multi-tube stirring mechanism and a lifting mechanism. The air-cooling multi-tube stirring mechanism comprises a stirring mechanism body and an air supply mechanism. The stirring mechanism body is composed of a stirring motor, a multi-tube stirring rod and a bevel gear drive group which are arranged on a lifting platform. The multi-tube stirring rod is supported and positioned through a bearing. The air supply mechanism is composed of an air guide tube and an air supply device. One end of the air guide tube is combined with the air supply device, and the other end of the air guide tube is inserted into the multi-tube stirring rod. Multiple stirring pipes are filled with air entering the air guide tube. The device is simple in structure, convenient to use, high in efficiency, safe, reliable, wide in applicable scope in alloy and especially suitable for preparing large-volume semi-solid alloy slurry, the melt temperature, the stirring speed, the number of the stirring tubes, the inner diameter, the wall thickness, the stirring time and air ventilation quantity can be accurately controlled, and industrial application and popularization are facilitated.

The present invention belongs to the field of chemical and papermaking, and is the process of producing pulp with potassium compound-containing digestion preparation for cellulose material. The production process includes the following steps: digesting cellulose material with potassium compound-containing digestion preparation to obtain mixture of paper pulp and pulp making waste liquor; extracting pulp making waste liquor and washing pulp material; concentrating pulp making waste liquor; and spray drying the concentrated waste liquor to produce organic potash fertilizer, which is further produced into re-mixed organic fertilizer with other chemical fertilizer material. The said technology can utilize papermaking waste liquor comprehensively at low cost and avoid the pollution to water.

The invention discloses waste water coal coke slurry and a preparation method and a use thereof. The waste water coal coke slurry comprises the following components by weight percent: 20-60% of petroleum coke, 5-40% of low-grade coal, 25-35% of industrial waste water and 0-10% of water. The waste water coal coke slurry prepared by the preparation method can fully utilize the water, organic matters and macromolecular compounds in industrial waste water, reduce the adding quantity of a dispersant and eliminate the need of adding a stabilizer; the shortcomings that water coke slurry is poor in stability and difficult to catch fire and gasify are overcome; and the complementarity of physical and chemical properties of the low-grade coal and the petroleum coke is reasonably utilized, and the shortcomings of low mixture ratio of the petroleum coke in the slurry prepared by mixing the low-grade coal with the petroleum coke and low concentration of the formed slurry are further overcome. The prepared waste water coal coke slurry has better flowability and stability, is easy to store, convey and atomize, can be used as raw material for burning or gasification, and has potential large-scale industrial application prospects.

The invention discloses a kraft pulping process of camphorwood. The kraft pulping process comprises the following preparation steps that 100% camphorwood pieces are taken out for peeling, chipping andscreening operations, sent into a cooking pot for cooking operation, put into a scrubber for washing operation, sent into a pressure screen for screening operation, carried out bleaching operation byusing hydrogen peroxide, and sent into a slurry tower for storage operation. According to the kraft pulping process of the camphorwood, the purpose is that the camphorwood pieces after stewed camphorand camphor oil can be reused, process flow and process parameters can be made according to the material characteristics of camphorwood, the pulping cost is low, the pulp quality is good, and needs of high-grade paper production can be fully met.

The invention provides a device and method for preparing a large-diameter semi-solid alloy billet. The device comprises a material pouring crucible used for containing molten alloy, a slurrying chamber, a stirring rod and an air duct, and the material pouring crucible is linked with the upper end of the slurrying chamber; the stirring rod is arranged in the slurrying chamber, and a cavity for containing semi-solid alloy slurry is formed between the outer wall of the stirring rod and the inner wall of the slurrying chamber; the stirring rod is of a hollow structure, and the air duct is inserted into the stirring rod; and a slurry outlet is formed in the bottom of the slurrying chamber, and the lower portion of the slurrying chamber is combined with a large-diameter collection crucible used for containing the semi-solid alloy billet. According to the device and method for preparing the large-diameter semi-solid alloy billet, strong stirring and rapid cooling of the molten alloy can be achieved by adjusting an interval between the outer wall of the stirring rod and the inner wall of the slurrying chamber, the ventilation amount in the air duct and the stirring speed of the stirring rod, the prepared semi-solid slurry directly outflows from the slurry outlet formed in the bottom of the slurrying chamber, the outflow velocity of the slurry can be precisely controlled by moving the stirring rod in the axial direction, the preparation volume of the semi-solid slurry is not limited by the size of the slurrying chamber, and the preparation efficiency of the slurry is high.

A low-and medium-pressure blasting method for pulping the broad-leaf wood includes proportioning the alkali (1-6 wt%), Na-S compound (1-16 wt%), assistant (0-1 wt%) and broad-leaf wood (rest), stirring at ordinary temp -90 deg.C for 0-24 hr, treating at 140-220 deg.C and 0.8-2.28 MPa for 3-15 min, and sudden blasting. Its advantages are high strength, output rate, whiteness, toughness and rinsability, and low energy consumption.

The invention discloses a ternary copolymer coal water slurry dispersing agent represented by a structure general formula (I), wherein m is 5-30, n is 5-30, p is 5-20, h is an integer of 4-20, R is H or the following groups, X is -N(CH3)2, -N(CH2CH3)2 or the following groups. According to the present invention, a hydrophilic three-dimensional film is formed on the surface of coal particles to produce effects of wetting and absorption on a solid-liquid interface so as to produce a dispersion effect to the system, the prepared dispersing agent has characteristics of coal concentration increase, coal stability increase and viscosity decrease, a coal water slurry preparation cost is low, and the method is suitable for industrial production.

The invention discloses a continuous cooling snake-shaped flow channel semi-solid rheo-die casting device. The continuous cooling snake-shaped flow channel semi-solid rheo-die casting device comprises a snake-shaped flow channel fixed die and a snake-shaped flow channel moving die. The snake-shaped flow channel fixed die is matched and connected with the snake-shaped flow channel moving die through a guide post. A snake-shaped flow channel is formed at the joint between the snake-shaped flow channel fixed die and the snake-shaped flow channel moving die. The snake-shaped flow channel moving die is connected with an electric cylinder. The snake-shaped flow channel fixed die and the snake-shaped flow channel moving die are each internally provided with a plurality of cooling water channels. Each cooling water channel is of a transverse U-shaped structure. One end of each cooling water channel is provided with a water channel sealing block. According to the continuous cooling snake-shaped flow channel semi-solid rheo-die casting device, the multiple cooling water channels are formed on the periphery of the snake-shaped flow channel; water is used as a cooling medium to continuously cool the snake-shaped flow channel; in the using process, the temperature difference between the snake-shaped flow channel and an alloy solution can be kept large, and then the chilling action of the snake-shaped flow channel dies on the later part of alloy solution is maintained. Nucleation is promoted. The pulp making effect is substantially improved.

The invention relates to a method for improving stability of water-coke slurry. The water-coke slurry is prepared from the raw materials, including petroleum coke, activated sludge, water and a dispersing agent. The method comprises the steps of (1) sieving petroleum coke through a sieve, and remaining petroleum coke of which the particle size is less than 0.8mm; (2) dissolving the dispersing agent into water, and uniformly agitating for later use; (3) integrally uniformly mixing the dispersing agent solution obtained in step (2) and activated sludge, pouring into a ball mill tank together with the petroleum coke processed in step (1), wherein the quantity ratio of large balls to small balls in the ball mill tank is 30: 150; a ball mill rotates at the speed of 230 to 380r/min; the ball milling costs 30 to 50 minutes; (4) filtering the slurry obtained by ball milling through a sieve with 40 meshes so as to remove impurities and large particles and obtain water-coke slurry. According to the method, the activated sludge is doped into the water-coke slurry to greatly improve the stability of the water-coke slurry, so that the problem of poor stability of the water-coke slurry can be completely solved; meanwhile, a new treatment way is provided to the activated sludge of a melting plant, and the sludge treatment cost of the melting plant can be reduced.

The invention discloses high-concentration coal water slurry and a preparation method thereof. The concentration of the high-concentration coal water slurry is 63-75wt%, and the mass ratio of dry basis coarse particle pulverized coal to medium particle pulverized coal to fine particle pulverized coal to additive in the coal slurry is (10-60): (10-50): (5-50): (0.5-5). The low-ash coal slurry withthe solid content of 10%-35% and the ash content of 1%-10% is prepared by taking inferior low-quality coal as a raw material through a micro-ore separation technology. The low-ash coal slurry is usedas a medium-particle coal slurry raw material and a fine-particle coal slurry raw material, and coarse-particle pulverized coal which is obtained by grinding clean coal and has the particle size of 150-500 microns is added into the low-ash coal slurry, high-concentration coal water slurry is prepared by adjusting particle size distribution of pulverized coal to be in three-peak distribution, the concentration range of the high-concentration coal water slurry is 63-75 wt%, the apparent viscosity of the high-concentration coal water slurry is 850-1300 mPa.s, the fluidity of the high-concentration coal water slurry is B or above, and the stability of the high-concentration coal water slurry is in level B or above. Low-ash coal slurry obtained by upgrading low-quality coal through a micro-mineral separation technology does not need to be subjected to filter-pressing dehydration treatment, re-crushing and re-dispersing of filter-pressing clean coal filter cakes do not need to be considered,and the cost can be greatly saved by directly pulping the low-ash coal slurry through micro-mineral separation.

The invention discloses biomass water-coal-slurry prepared by using livestock breeding wastes. The biomass water-coal-slurry is prepared by the following steps: uniformly mixing coal powder, the livestock breeding wastes and water; and adjusting the pH value to 7-9 by sodium hydroxide, wherein the mass ratio of solid matters in the livestock breeding wastes to dry base coal in coal powder is (0.15-1.5) to 100. By replacing additives and part of coal by means of the livestock breeding wastes, the livestock breeding wastes are used as resources, and meanwhile, the use level of coal and water in the pulping process is reduced. The biomass water-coal-slurry has the characteristics of low cost, simple process and environment friendliness. The mass percentage concentration of the obtained biomass water-coal-slurry is not less than 60% and the biomass water-coal-slurry meets the industrial requirements in size distribution, viscosity, pH value and stability.

The invention relates to a physical waste paper deinking technology. The technology comprises the following steps: 1, shredding: shredding waste paper with a shredder to form fragments; 2, fluffing: fluffing the waste paper fragments by a fluffer to form semi-fibers or fibers; 3, defibrination: defibering the fluffed semi-fibers or fibers by a defibrination machine to form single fibers; 4, washing: washing fiber raw materials; and 5, water precipitation reuse: allowing washing water to flow to a precipitating pool and naturally settle to form clear water, and reusing the clear water in above defibrination and washing operations. The technology allows the clean and effective deinking process of various books, newspaper, double-sided thick-ink posters, static duplicating paper and the like to be completed through a physical method without various chemicals comprising a deinking agent, an enzyme or the like, the deinking degree reaches 98%, and the paper pulp obtained after washing has a good whiteness and a high yield; and the pulp preparation cost is low, the washing water can naturally settle to form the clear water without adding any water treatment medicines, and the water reuse has no influences on deinking, so sewage-free discharge is completely reached.

The invention belongs to the technical field of pulping and papermaking and particularly relates to a method of preparing semi-chemical pulp with broadleaf wood slab. In the method, the broadleaf woodslab is used as a raw material and is pre-treated with alcohol; then through two-stage defibrination, washing and sieving, high-performance semi-chemical pulp is produced. In the method, the broadleaf wood slab, as the raw material, has abundant sources and is low in cost. With the alcohol as a main solvent for treating the broadleaf wood slab, alkali use amount is reduced, and cost of treating pulping black liquor is saved.

The invention discloses a method for preparing high-concentration coal water slurry by means of fine crushing and little grinding. The method includes steps of (1), mixing and stirring fine coal powder, water and additives with one another in mixing and stirring tanks to obtain slurry; (2), finely grinding the slurry by the aid of wet processes to obtain fine slurry A, feeding the fine slurry A back into the mixing and stirring tanks, mixing and stirring the fine slurry A, the fine coal powder, the water and the additives with one another to obtain finished coal water slurry, diluting a part of the finished coal water slurry by water and then finely grinding the diluted finished coal water slurry by the aid of wet processes to obtain fine slurry B, feeding the fine slurry B back into the mixing and stirring tanks in a circulation manner and carrying out mixing and stirring steps. The method has the advantages that the high-concentration coal water slurry is prepared by means of fine crushing and little grinding, the conventional single-rod/ball mill ore grinding slurry production can be replaced, slurry production energy consumption can be saved by 40-65%, accordingly, the slurry production cost can be obviously reduced, and the high-concentration coal water slurry is high in concentration, low in viscosity and good in flowability and stability.