184results about How to "Solve stacking problems" patented technology

The invention belongs to the technical field of comprehensive utilization of waste resources from the aluminum industry and specifically discloses a comprehensive utilization method of aluminum ash. According to the comprehensive utilization method of aluminum ash, metallic aluminium is extracted from aluminum ash through an ore grinding method; the aluminum ash obtained after aluminium extraction undergoes catalytic deamination; the aluminum ash obtained after deamination is mixed with alkali and granulation forming is then carried out; and the granulation product is sintered and the sintered product is finally dissolved out. By the above method, useful components in the aluminum ash can be recovered to the maximum; ammonia gas which has been ignored for a long time is effectively recovered; components such as aluminium oxide, villiaumite and the like are recovered and utilized to the maximum; pollution of aluminum ash processing to the environment is avoided; atmospheric dust pollution is avoided; atmospheric pollution is also avoided due to ammonia gas recovery; pollution of aluminum ash stacking to underground water and soil is avoided due to extraction and recovery of fluoride salt; and environmental safety during the treating process is guaranteed.

A construction method for a precast energy pile is characterized in that a heat transfer tube is embedded into a hollow steel tube, the hollow steel tube replaces a traditional solid reinforcement and serves as a main reinforce ement of the precast pile, and for being connected with the heat transfer pipe in the precast pile, a heat transfer elbow and a heat transfer tube joint are embedded into a precast pile shoe and a precast pile cap. As the heat transfer tube is embedded into the hollow steel tube, the technical problems of mutual interference, poor concrete compactness, reinforcement corrosion, effect on the overall bearing capacity of a pile foundation and the like caused by binding and embedding of the heat transfer tube and the main reinforcement are effectively solved. Moreover, the embedded tube is higher in survival rate, a large number of piles are conveniently stacked and safely transported, construction period is short, and underground space and construction cost are saved.

The invention discloses a method for preparing a gypsum building block with titanium gypsum. The method comprises the following steps: crushing titanium gypsum to fine powder of which grain size is less than 80mu m, dewatering and drying at 180-220 DEG C; mixing the dried titanium gypsum powder, semidry FGD residues, light-weight aggregate, paper fibre, gypsum booster, retarder and water reducing agent evenly according to a certain ratio, then adding water to stir evenly; pouring the evenly mixed slurry in a standard mould, performing vibro-moulding; and performing natural curing for 2 hours, demoulding, and airing to obtain the gypsum building block. The gypsum building block prepared by the method of the invention is characterized by small volume, low density, high strength and softening coefficient and the like; and the physical performance of the prepared gypsum building block completely meets the national building material industry standard JC/T698-1998. The method for preparing the gypsum building block with titanium gypsum provided by the invention provides a new application way of titanium gypsum and solves the stacking problem of titanium gypsum and the environmental pollution problem.

The invention relates to a sylvite solid mine backfilling technology, in particular to a manufacturing method of a coagulation salt for sylvite solid mine backfilling. The manufacturing method of the coagulation salt for the sylvite solid mine backfilling comprises the following steps of: mixing and uniformly stirring magnesium oxide, a magnesium chloride saturated solution and sodium chloride salt particles contained in tailings according to the mass ratio of 1.00:(0.80-1.20):(5.00-15.00) to form a first slurry; also mixing and uniformly stirring the magnesium chloride saturated solution and the sodium chloride salt particles according to the mass ratio of 1.00:(8.00-15.00) to form a second slurry; finally pouring the first slurry and the second slurry, carrying out press forming, and then solidifying for 12-24 hours; and conserving under the condition that environmental temperature and humidity is less than 70 percent to prepare a coagulation salt block, wherein the coagulation salt block structurally comprises an outer layer (1) and an inner core (3). The invention has simple manufacturing process, low cost and good social benefit and economic benefit, solves the problems of pollution and stack caused by the tailings on the vegetation of a surrounding environment and realizes the requirements for clean production and environmental protection.

The invention relates to a novel dry-mixed plastering mortar which is composed of the following components in percentage by mass: 20-50% of limestone, 0-30% of limestone tailing, 20% of iron tailing, 15% of yellow sand, 9-25% of cement and the balance of admixture. The admixture is composed of a modifier and a thickener, wherein the modifier is one or mixture of more of cellulose ether, water reducer, air entraining agent, retarder, starch ether and polyvinyl alcohol; and the thickener is mortar thickening powder. The invention effectively utilizes the limestone tailing and iron tailing, solves the problem of placement of the limestone tailing and iron tailing, and avoids the environmental damage of the limestone tailing and iron tailing; the invention lowers the cost of the dry-mixed plastering mortar; and the produced dry-mixed plastering mortar has excellent properties and can effectively substitute natural sand.

The invention relates to the field of building materials, in particular to preparing dry powder mortar by utilizing precision casting waste sand. The dry powder mortar is prepared by mixing 13-35 percent of cement, 3-4 percent of pulverized fuel ash, 30-40 percent of yellow sand, 2.7-3.4 percent of mortar thickening powder, 0.01-4 percent of admixture, and 30-40 percent of precision casting waste sand. In the invention, the dry powder mortar is prepared on the premise of ensuring the same dry powder mortar performance through pretreating the precision casting waste sand by utilizing the precision casting waste sand as an aggregate to replace part of yellow sand. Thus, not only the stacking problem of the precision casting waste sand can be solved but also the cost of the dry powder mortar can be reduced, thereby promoting the popularization of the dry powder mortar and meeting the environmental protection policy for energy saving and emission reduction in China.

The invention provides a method for preparing ferronickel byproduct active smelting electric furnace grain slag through red mud and nickel laterite ore. The method is characterized by comprising the following steps that 1, proportioning is carried out, specifically, raw materials include the red mud, the nickel laterite ore, coke powder and lime; and 2, reduction smelting of a smelting electric furnace is carried out, specifically, clusters formed through the raw materials prepared in the step 1 are conveyed into the smelting electric furnace for reduction smelting, slag and iron separation is completed through slag pre-making, melting and reduction, a furnace slag layer is formed, the furnace slag is discharged out of a slag opening regularly and subjected to water quenching or air-cooling pelletization, and the active smelting electric furnace grain slag is obtained. The smelting electric furnace grain slag prepared through the method can serve as a mixed material applied in the cement production process, the cement performance is improved, the variety and labels of cement products are adjusted, and the production cost is reduced; and meanwhile, the slag can be used for producing a concrete admixture independently or by being combined with other raw concrete admixture materials, and the resource utilization of the ferronickel byproduct active smelting electric furnace grain slag prepared through the red mud and the nickel laterite ore is effectively achieved.

The invention discloses a process of directly forming and utilizing coal slime of a coal cleaning plant. The process comprises the following steps: directly transporting the coal slime from a filter-pressing workshop of the coal cleaning plant to a dosing machine; adding a certain amount of raw coal and an adhesive in percentage by mass; adopting a double-roller forming machine or a screw extruder to form after stirring and uniformly mixing. According to the process disclosed by the invention, the filter-pressing coal slime is not needed to be dried, and can be directly transported to a forming site, so that the coal slime is prevented from occupying land and being polluted. The forming process is simple, a briquette coal product is good in mechanical strength, so that the calorific value of the coal slime briquette coal can be adjusted by matching with the raw coal, and therefore, the use requirements of different users are satisfied. The process disclosed by the invention can be used for effectively solving the problems that the coal slime of the coal cleaning plant is in excess of demand, occupies land, and is polluted.

The invention discloses a pillar pre-isolation sublevel stick-filling mining method and an ore body therefor. The pillar pre-isolation sublevel stick-filling mining method comprises the following steps of 1, dividing the whole mining area into multiple zones, dividing each one of the zones into a step-I stick chamber, a step-III stick pillar, a step-II stick chamber and a step-IV stick pillar orderly arranged along an ore growth direction, and 2, orderly carrying out stoping on the step-I stick chamber, the step-II stick chamber, the step-III stick pillar and the step-IV stick pillar, wherein the same-step stick stopes in all the zones are stoped simultaneously. The pillar pre-isolation sublevel stick-filling mining method has the advantages of low mining cost and high production efficiency.

The invention relates to a preparation method of a light-weighted autoclaved unburned block, which relates to the integrated utilization of a solid waste. Aerated concrete block waste is crushed into aggregate; dry FGD is mixed with the aggregate, added with water during the stirring and formed, to prepare an adobe; and the adobe is sent into steam to be cured, to prepare the light-weighted autoclaved unburned block. The preparation method of the light-weighted autoclaved unburned block has small finished product density, high strength and lighter weight, realizes the 'zero emission' of the dry FGD in a dry desulfurization process, solves the problem of enterprise product waste piling of the aerated concrete block, and reduces piling sites; the compressive strength and the flexural strength of the unburned block exceed the standard of a national autoclaved lime sand brick superior product; the weight of the produced autoclaved unburned block is 20 percent less than that of the traditional clay brick and autoclaved sand-lime brick on the basis of reaching all strength standards of the traditional red brick; no secondary pollution is produced, and the integrated utilization of resources is realized; and the process is simple, and the investment and treatment cost is low. The preparation method of the light-weighted autoclaved unburned block is universal.

The invention discloses heat-preservation and energy-saving bricks made from Taihu silt. The bricks comprise the following raw materials in percentage by weight: 25 to 45 percent of Taihu silt, 1 to 20 percent of illite, 1 to 15 percent of kaolin, 10 to 20 percent of waste clinker, 1 to 10 percent of quartz, 5 to 20 percent of feldspar, 1 to 5 percent of a dry-blend and 3 to 8 percent of water. The preparation method for the heat-preservation and energy-saving bricks comprises the following steps of preparing the Taihu silt; weighing the raw materials in percentage by weight, and rolling and kneading the raw materials into uniform clay strips; performing vacuum extrusion forming to obtain wet blanks, wherein the forming pressure is 2.0 to 4.0MPa; drying the wet blanks for 2 to 4 hours at 100 to 200 DEG C to obtain dried blank bodies; firing the dried blank bodies for 3 to 20 hours at firing temperature of 1,000 to 1,200 DEG C to obtain heat-preservation and energy-saving brick finished products. According to the heat-preservation and energy-saving bricks, the Taihu silt is effectively cleaned and stacked, and the fired products have the characteristics of heat preservation, waterproofness, shock resistance, durability and the like.

The invention discloses a preparation method of a sintered water permeable brick. The method comprises the following steps of: pre-processing raw materials, drying, crushing and pelleting, adding caking powder to manufacture mixed powder, compression moulding, and finally sintering, wherein the main raw material is sludge in Taihu Lake, and the pre-processing comprises the following steps of: a, excavating the sludge in Taihu Lake, drying and crushing the sludge, sieving in a 40-mesh sieve; b, sufficiently mixing 50-10wt% of sludge in Taihu Lake, 0-30wt% of bauxite, 0-20wt% of lithium feldspar in proportion, adding water, manufacturing the uniformly mixed pug with water content of 10-20wt%, pelleting by using a pelleting machine, wherein the granularity is 4-24 meshes; c, after moulding the particle, drying and then sintering, wherein the sintering temperature is 850-1200 DEG C, and the sintering time is 180min. By specially pre-processing the sludge in Taihu Lake, the subsequent pressing and high-temperature sintering can be performed to manufacture the water permeable brick, the water permeable brick is high in strength, and high in water permeable speed; and the dual purposes of recycling the sludge in Taihu Lake and improving the urban ecological environment is realized.