37results about How to "Reduce stacking area" patented technology

The invention relates to a preparation for a fly ash-based geopolymer and an application method thereof. The method mainly comprises the following steps: excitant solution and fly ash are mixed and stirred to paste; the paste is injected into a mold frame for molding; the molded product is maintained; the excitant solution is 2mol/L-5mol/L of silicate solution or water glass solution with the solid content to be 25-40% and the modulus to be 1.0-1.5. The preparation and the application method of the fly ash-based geopolymer fully use the industrial waste fly ash, which has the advantages of reducing cost, being favorable for environmental protection, reducing energy consumption and convenient application; the product obtained has the excellent characteristic of geopolymer.

The invention discloses a sludge curing agent and application thereof. The sludge curing agent is suitable for curing treatment on high-water-content sludge in town sewage treatment plants, rivers andlakes. The sludge curing agent comprises the following raw materials in percentage by weight: 26 to 44 percent of silicon aluminum iron calcium oxide, 19 to 37 percent of calcium oxide, 13 to 30 percent of special cement, 5 to 25 percent of polyacrylamide and 0.2 to 3 percent of chitosan. The sludge curing agent realizes sludge curing and stabilization through the chemical property of the industrial waste and the mutual activity excitation; the water content of the sludge is effectively reduced, the early-stage compressive strength and the flexural strength of the sludge are improved, and mechanical operation during backfilling is facilitated; heavy metal in the sludge is adsorbed by the chitosan, organic matters are degraded, the pathogene is deactivated, pollution is reduced and stink can be eliminated; and the sludge curing agent is low in price and simple in curing process, and the cured sludge does not cause secondary pollution.

The invention discloses a process for producing pellet by mixing and processing hematite, siderite and vanadium titano-magnetite concentrate, comprising the following steps of: proportioning, mixing, granulating, sieving, drying, preheating and roasting. The specific process conditions are adopted for proportioning, mixing, granulating, sieving, drying, preheating and roasting so that the mixed hematite and siderite and the surface submarginal vanadium titano-magnetite which are difficult to utilize can be well processed and produced into the pellet, wherein the mixed hematite and siderite has the iron concentrate (TFe) grade of 56%, the phosphor content of 0.21-0.35% and the silicon dioxide content of 9.34-10.12%, and the surface submarginal vanadium titano-magnetite has the iron concentrate (TFe) grade of more than 56%, the phosphor content of 0.015% and the silicon dioxide content of 9.13%. Therefore, the advantages of the mixed hematite and siderite and the surface submarginal vanadium titano-magnetite are complemented, and the mixed hematite and siderite and the surface submarginal vanadium titano-magnetite meet the smelting requirement. The invention effectively enhances the utilization rate of the ores and can bring high economic benefit for enterprises and decrease the land occupation of stacked waste ores and the adverse effect on environment.

The invention discloses a mining method with mining-dressing and filling treatment, which includes design of main gangue sources for a little gangue working face, and gangue-reducing measures; ganguesorting system arrangement and equipment, and sorting process; filling-cooperated caving-type coal efficient stoping system arrangement and equipment, and production process; environmental influence pretreatment and pre-control measures before and after gangue filling; design principle and steps of the mining method with 'mining-dressing and filling treatment'. The method herein helps solve the long-range conveying problem of gangue, reduce underground gangue lifting cost, reduce mine auxiliary lifting and surface coal washery burden, effectively treat coal gangue to reduce surface piling areaof coal gangue, reduce mine ecological environment damage, protect the ecological environment; gangue filling and coal efficient stoping face has high unit production under high unit efficiency, therequirements of modern mines for production capacity can be met, and the method herein has a good application prospect.

The present invention relates to a green recycled building material. The material is characterized in that: the method for producing the green recycled building material comprises the following steps: 1, carrying out mechanical crushing on building wastes from building demolition to obtain recycled sand with a fine sand state; 2, adopting the recycled sand to prepare concrete and mortar, and adding an additive, such that the performances of the concrete mixture meet the following requirements, wherein a ratio of the recycled sand to the additive is 97:3, and the requirements comprise that: the strength grade is C20, the water cement ratio is 0.60-0.62, and the collapsing degree (cm) is 5.0. With the green recycled building material of the present invention, the environmental pollution due to the discharged wastes during the building demolition process is effectively solved, the shortage problem of the natural sand source is solved, and the problems of area occupying due to urban waste stacking, and environmental pollution are reduced. The experiment results show that: performances of compressive strengths, mechanical properties, freezing resistance, carbonization properties and the like of the masonry mortar and the concrete reach or exceed the design standards, wherein masonry mortar and the concrete are prepared by using the recycled sand. In addition, significant economic benefits and significant social benefits are provided.

The invention relates to anti-radiation mineral admixture containing barium slag. The anti-radiation mineral admixture comprises, by mass, 50%-60% of the levigated barium slag, 20%-30% of coal ash, 10%-15% of levigated mineral powder, 0.5%-1% powder polycarboxylic acid water reducer, 0.1%-0.3% of polypropylene fiber, 5%-10% of silica fume and 0.5%-1% of thickener. The anti-radiation mineral admixture has the following advantages that a barium slag reuse way is provided; good radiation resistance is achieved; the anti-radiation mineral admixture can replace part of cement to be used in concrete, and the production cost of the concrete is lowered; the anti-radiation mineral admixture containing the barium slag is simple in preparing method, easy and convenient to prepare, low in cost and suitable for being produced on a large scale.

The invention relates to a process for sand washing with stone dust. The invention is characterized in that the process for sand washing with stone dust comprises the following steps: (1) performing filtering and water scrubbing to separate out fine sand, soil particles and water; (2) sending the separated rough sand into a crusher for crush with water; (3) separating the sand, soil particles and water which are recrushed, refiltered and rescrubbed and the mixture of the sand, soil particles and water which are crushed, refiltered and scrubbed at the first time; (4) separating the mixture of sand, soil particles and water and then obtaining the finished sand and the finished soil particles which can be used to improve soil, wherein the water can be recycled for use. The invention performs three-waste treatment and processing to the waste stone dust generated during the production in a quarry, uses the stone dust which contains dust, fine sand and rough sand in the quarry as the raw materials to produce the building sand, thereby not only saving the problem concerning the shortage of the natural fine aggregate resource, but also being favorable for the environment protection in a aggregate production place and reducing the stacking place of the quarry waste and the environmental pollution.

The invention discloses a composite modified cement stabilized regenerative aggregate base mixture and a preparation method thereof. The base mixture is prepared from the following raw materials in parts by weight: 100 parts of aggregate, 3 to 7 parts of cement, 0.09 to 0.49 part of composite modified material, 0.2 to 1.2 parts of rubber granules, 0.05 to 0.2 parts of basalt fibers and 5.6 to 6.6parts of water. The composite modified cement stabilized regenerative aggregate base mixture added with fibers and rubber has excellent mechanical strength, such as drying shrinkage, temperature shrinkage, frost resistance and compression resistance. The invention further discloses the preparation method for the composite modified cement stabilized regenerative aggregate base mixture added with fibers and rubber, the sources of the raw materials used by the preparation method are wide, prices are low, the preparation process is simple, and the preparation method has economic and social benefits.

The invention discloses UHPC with high-volume mixed ceramic tile aggregate C160 and a preparation method thereof. The UHPC is prepared from the following components in percentage by weight: 757.5 kg/m<3> of cement, 151.4 kg/m<3> of silica fume, 37.9 kg/m<3> of fly ash, 151.0 kg/m<3> of ceramic tile powder, 46.4 kg/m<3> of a high efficiency water reducing agent, 212.2 kg/m<3> of aggregate, 848.6 kg/m<3> of quartz sand, 189.3 kg/m<3> of water and 156 kg/m<3> of steel fiber. The invention further discloses a preparation method of the UHPC. A curing method comprises the following steps: tightly wrapping a concrete test block with wet cotton cloth, and performing high-frequency intermittent watering curing or curing in water. The curing system is simplified, and evaporation of water in concretecan also be effectively prevented. The UHPC has the following technical advantages: waste ceramic tiles are recycled, consumption of natural materials is reduced, and effects of energy conservation and environmental protection are achieved; the ceramic tile powder has pozzolanic activity, and improves strength, durability, cracking resistance and flexural strength of the concrete. The ceramic tile powder with different particle sizes is added to fill gaps accumulated between quartz sand, so that the structure is more compact; the water-binder ratio and the high-efficiency water reducing agentare preferably selected, and the UHPC has the advantage of self-compacting.

The invention discloses a building hollow brick prepared by dredged sludge. The building hollow brick is prepared from the following raw materials in parts by weight: 10 to 28 parts of dredged sludge (weight after dehydration), 30 to 55 parts of coal gangue, 8 to 16 parts of quick lime, 4 to 8 parts of gypsum, 10 to 18 parts of water glass, 10 to 15 parts of cement, and an accelerator which is 0.2 to 0.4 percent of the total weight of the raw materials. The invention also discloses a method for preparing the building hollow brick by using the dredged sludge. The method comprises the following steps: processing raw materials, stirring and mixing, pressing for molding, and maintaining, thereby obtaining a finished product. By adopting the technical scheme, a great amount of coal gangue is consumed, and thus the floor occupation is gradually reduced; when the water content of the dredged sludge reaches a certain value, the dredged sludge can be used, so that the water consumption is reduced, the stacking time is reduced, and the occupied floor is further reduced; and meanwhile, a great number of harmful substances generated by decomposing organic matters in the naturally drying process of the dredged sludge are reduced, so that the environmental pollution caused by the harmful substances is avoided.

The invention relates to the field of water reducing agents, in particular to automatic production equipment of an environment-friendly polycarboxylic acid water reducing agent and a process thereof. The technical problems that existing polycarboxylate superplasticizer residues are attached to a conveying belt and can corrode the conveying belt, existing equipment is poor in cleaning effect on the conveying belt through brushes, and filtering matching is difficult to achieve in the feeding process are solved. According to the technical scheme, the automatic production equipment for the environment-friendly polycarboxylate superplasticizer comprises a first mounting plate, a dispersing system and the like; and a dispersing system is connected between the opposite sides of the two first mounting plates. The powder water reducing agent is driven to be sieved in a centrifugal mode, large-particle and blocky water reducing agents are subjected to collision type separation in the sieving process, the powder water reducing agent in the conveying process is turned over, and meanwhile the accumulated water reducing agent is subjected to vertical separation so as to reduce the accumulation area; and the polycarboxylate superplasticizer on the surface of the conveyor belt is removed in a mutual dislocation mode.

The invention discloses high-volume mixed ceramic tile aggregate C150UHPC (Ultra-High Performance Concrete) and a preparation method thereof. The high-volume mixed ceramic tile aggregate C150UHPC is prepared from the following components in proportions: 776.5kg/m<3> of cement, 155.3kg/m<3> of silica fume, 38.8kg/m<3> of pulverized fuel ash, 155.3kg/m<3> of ceramic tile powder, 46.6kg/m<3> of a superplasticizer, 217.4kg/m<3> of ceramic tile aggregate, 869.7kg/m<3> of quartz sand, 184.4kg/m<3> of water and 156kg/m<3> of steel fiber. The invention also discloses the preparation method of the high-volume mixed ceramic tile aggregate C150UHPC. A maintenance mode is characterized by tightly coating a concrete test block by using wet cotton cloth, and intermittently spraying water at a high frequency for maintaining, or maintaining in water. Not only a maintenance system is simplified, but also evaporation of water in concrete is effectively prevented. The high-volume mixed ceramic tile aggregate C150UHPC disclosed by the invention has the following technical advantages that waste ceramic tiles can be recycled, consumption of natural materials is reduced, and the effect of environmental protection is achieved; the ceramic tile powder has pozzolanic activity, so that the strength , the durability, the cracking resistance and the bending strength of the concrete are increased; due to the doping of the ceramic tile powder in different grain diameters, accumulation gaps between the quartz sand is remedied, and the structure is tighter; a water-glue ratio and the superplasticizer are preferably selected, so that the high-volume mixed ceramic tile aggregate C150UHPC has the advantage of self-compaction.

The invention belongs to the technical field of forklift equipment, and particularly relates to a multifunctional clamping system for a forklift, which comprises a base plate module, two groups of moving adjusting modules are slidably connected in the base plate module, and clamping modules for clamping and gathering goods are rotatably connected in the moving adjusting modules. By arranging the clamping modules capable of being gathered, scattered light objects can be conveniently gathered, and therefore the efficiency of the forklift for transporting the scattered small objects is improved. Two first gear motors are fixed to the upper portion of the back face of a bottom plate, motor shafts, located in the bottom plate, of the first gear motors are in transmission connection with first rope winding wheels, two second guide wheels are fixed to the inner top face of a second square pipe, and one end of a first traction rope is wound around the outer wall of each first rope winding wheel; the other end of the first traction rope sequentially passes through the second guide wheel, the third guide wheel and the first guide wheel on the same side to be fixedly connected with the traction shaft, in this way, the second rotating frame connected with the clamping module drives the clamping module to swing by controlling the first gear motor, and therefore the object stacking area is reduced.

The invention provides an alkaline activity inhibition material based on active sandstone aggregate and a preparation method of the alkaline activity inhibition material. By adopting the sandstone aggregate with potential alkaline activity, sandstone powder with the specific surface area of (645 to 950) m<2>/kg is prepared through twice grinding of a vertical mill and a ball mill, and the sandstone powder is uniformly mixed with medium heat cement and nano SiO2 in a certain proportion. The inhibition material is prepared from the following raw materials in percentages by weight: 75% to 87% of the medium heat cement, 10% to 20% of the sandstone powder and 3% to 5% of the nano SiO2. The alkaline activity inhibition material prepared in the invention has the technical advantages that the raw materials are easy to get, the machinability is good, the preparation technology is simple, the alkaline activity inhibition effect is obvious, and the preparation process is free of pollution to the environment, and is beneficial to large-scale production and application of engineering.

The invention relates to a plastic refractory for repairing a furnace lining of a medium-frequency induction furnace and a preparation method of the plastic refractory. According to the technical scheme, 63.0 wt%-78.0 wt% of vanadium iron slag, 12.0 wt%-17.0 wt% of basalt, 8.0 wt%-13.0 wt% of bauxite and 2.0 wt%-7.0 wt% of bentonite serve as raw materials, a binding agent accounting for 4.0 wt%-5.5 wt% of the raw materials is added, the raw materials are mixed to be uniform, and the plastic refractory for repairing the furnace lining of the medium-frequency induction furnace is obtained. The vanadium iron slag comprises the following main chemical components: more than or equal to 83.5 wt% of Al2O3, more than or equal to 9.0 wt% of MgO, less than or equal to 5.0 wt% of CaO, less than or equal to 0.3 wt% of SiO2, less than or equal to 0.2 wt% of Fe2O3 and less than or equal to 0.2 wt% of IL. Therefore, the method has the characteristics of environmental friendliness, simple process and low production cost; and the prepared plastic refractory for repairing the furnace lining of the medium-frequency induction furnace is convenient in construction mode, high in bonding strength, excellent in slag resistance and long in service life.