799 results about "Clinker (waste)" patented technology

The invention relates to a multi-hole foam glass carrier for a fast mass transfer biological fluidized bed and a preparation method and application thereof, which belong to sewage disposal technology. The multi-hole foam glass carrier is prepared by using waste glass as a raw material to be composited with volcanic rocks, coal ash, coal gangue, furnace clinker, iron powder, aluminum powder, binding agents, foaming agents, foam stabilizer and fluxing agents by weight, and multi-hole foam glass is obtained by stages of preheating, fast sintering, foaming, fast cooling and annealing. The preparation process of the multi-hole foam glass carrier is simple in route, easy to control and low in cost, and the prepared carrier is stable in performance, high in porosity, large in specific surface area, resisting in impact, good in mechanical performance, high in biocompatibility, favorable to efficient fixing of the microorganism, and suitable to the fast mass transfer biological fluidized bed. The multi-hole foam glass carrier solves the problem that biological immobilization carriers in the prior art are easy to abrade, small in bio-film formation amount, low in mass transfer effects and the like in the fast mass transfer biological fluidized bed. The preparation method opens up new approaches for preparing the biological carriers, and fills blank spaces in using of foam glass materials in sewage disposal.

The invention relates to the field of building materials, and in particular relates to a concrete material for paving a road surface and a preparation method of the concrete material. The concrete material for paving the road surface comprises the following components, namely a gel material, aggregate and additives; the gel material consists of iron tailings, blast furnace slag, cement clinker and gypsum; the aggregate consists of waste rubber powder treated by NaOH, sand and pebbles; the additives comprise an air entraining agent, an early strength agent and a water reducing agent; and the waste rubber powder is neutral rubber powder which is a rubber powder suspension treated by using NaOH. The concrete material disclosed by the invention has the beneficial effects of achieving reasonable utilization of waste resources, effectively utilizing the iron tailing, waste rubber powder and other resources, solving the problem of treating the iron tailings, improving the performances, such as impact resistance, antifreezing property and anti-cracking property of concrete on the basis of saving the production cost, and prolonging the service life.

The invention relates to a steamed ecological water permeable environmentally friendly brick produced by waste ceramic residues and a manufacturing method thereof. The manufacturing method is characterized by comprising the following steps of: adding a lower brick material obtained by uniformly mixing waste ceramic residue powder, waste glass powder, garbage clinker powder, portland cement, calcium oxide, calcium sulfate, sodium chloride, a rosin hot polymer, calcium sulfonate, sodium aluminate and water to a double-axis mixing stirrer to stir into a wet state, and then vibrating, extruding and molding into a lower brick of the ecological water permeable environmentally friendly brick; uniformly coating a layer of fine material of an upper brick material obtained by uniformly mixing waste ceramic fragment powder, bentonite, talcum powder and water on the upper part of the lower brick by using a secondary spreader to manufacture a water permeable environmentally friendly brick blank under the pressure of 25-30Mpa; maintaining with steam; heating at constant temperature; and naturally cooling to manufacture the steamed ecological water permeable environmentally friendly brick product of the waste ceramic residues. The raw materials of the invention also can be manufactured into vegetation bricks of different specifications. The product has certain water permeability, air permeability and water retentivity, also has various functions of cooling, reducing noise, regulating the climate, eliminating the heat island effect of a city, improving the air quality, maintaining the surface water circulation, and the like and the advantages of high product strength, no pollution, low cost and good benefit and conforms to the requirements on saving energy, reducing emission, protecting environment and developing low-carbon economy.

The co-combustion process may comprise the following unit operations: routing of hot gas (10) generated in the clinker cooling process to a rotary kiln (1); use of part of the rotary kiln exhaust gas to dry solid wastes in rotary dryers; leading the gases from both the dryer and the combustion kiln to the secondary combustion chamber (2); use of additional fuel to boost up the secondary combustion chamber reaction temperature to as high as 1200° C.; primary dry gas scrubbing in a precalciner or precalciners (3, 3a); heat recovery (4) and power generation; secondary gas scrubbing (5) in a semi-dry scrubber; bag filtering after activated carbon injection and returning of all the collected ash and used carbon into the waste kiln and / or a cement kiln. Detrimental materials for cement processing generated by waste combustion can be by-passed to a scrubbing system and a cement kiln. Residue slag from waste kilns can be treated and reused.

The invention discloses a method for producing low-alkali Portland cement by using industrial solid waste and aims to overcome the problem that alkali content in cement produced by using traditional methods is high. The method comprises the following steps: A, preparation of the raw materials of 70 to 75% of mining debris of limestone, 7.0 to 12.0% of granulated blast-furnace slag, 6.0 to 10.0% of rejects of silica and 8.0 to 12.0% of converter steel slag; B, clinker calcination; and C, cement grinding. The method provided in the invention has the following characteristics: rejects of silica are used as a silico-regulating material, and not only the characteristic of low alkali content of the rejects of silica is made use of, but also the silica modulus N of the clinker can be adjusted by adjusting the proportion of the rejects of silica so as to inhibit the probability of skinning of a preheater and ring formation in a rotary kiln caused by excessively good burnability of materials. Lime kiln ash, the granulated blast-furnace slag and the converter steel slag are subjected to high temperature calcination, so alkali in the above-mentioned materials greatly volatilizes; therefore, alkali content in the raw materials is decreased, thereby meeting compounding requirements and creating conditions for production of low alkali cement.

The invention relates to a method for adjusting and controlling a feeding mode of lime-dried municipal sludge cooperatively treated with a cement kiln. The method comprises the following steps: producing cement clinker by virtue of an existing novel dry-process cement clinker production line; recycling lime-stabilized sludge; specifically, conditioning the sludge with the water content being more than 80% by using lime, drying by virtue of residual heat of flue gas until the water content of the sludge is less than 35%, directly feeding the dried sludge to a vertical mill or a predecomposition kiln to serve as substitute raw material and fuel for cement raw materials, homogenizing, and firing in a rotary kiln to obtain the cement clinker, wherein the additive amount of the lime-dried sludge is 1wt%-21wt% of the cement raw materials; feeding from a proper feeding hole according to the components of the lime sludge, and effectively adjusting and controlling the cement raw materials to keep the cement production line stable and ensure good clinker quality. According to the method, the efficiency of cooperatively treating the lime-dried sludge with the cement kiln is improved, the sludge treatment capacity is high, the secondary pollution is alleviated, the consumption of calcium carbonate in the cement raw materials can be reduced, microelements in the sludge take the effect of a mineralizing agent, and the clinker can be conveniently fired. The method can provide a reference for study on cooperative treatment of solid wastes and the like during industrial production by the cement kiln.

The invention discloses a method and a system for preparing sulfoaluminate cement from all solid wastes pretreated by aluminum ash. The method comprises the following steps of: heating aluminum ash tocarry out a heat treatment on aluminum ash at a temperature of not lower than 900 DEG C; homogenizing and mixing processed aluminum ash with red mud, desulfurized gypsum and carbide slag, drying themixed materials by using hot gas generated by the heat treatment, carrying out raw powder proportioning and grinding on the dried materials, and calcining the materials after raw powder proportioningand grinding to obtain sulfoaluminate cement clinker; wherein the aluminum ash comprises secondary aluminum ash or the aluminum ash is secondary aluminum ash. The tail of the rotary kiln is not proneto ring formation, the condenser is prevented from being blocked, long-time operation is guaranteed, and bauxite can be completely replaced.

The invention belongs to the technical field of building materials, and discloses cement concrete preventing corrosion of chlorine salt and a preparation method thereof. The concrete comprises a concrete gel material, yellow sands, stones, water and a water reducer, wherein the gel material comprises the following components in percentage by weight: 20-50% of ardealite, 30-60% of slag, 1-20% of steel slag and 1-20% of clinker. C30 mobile cement concrete, C40 mobile cement concrete and C40 hard concrete can be prepared by the method provided by the invention. The chlorine salt corrosion preventing performance of the cement concrete is remarkably superior to that of common silicate cement concrete or slag silicate cement concrete. The preparation method provided by the invention is simple. Various solid wastes can be effectively and reasonably utilized, and the condition that the cost and consumption of the existing cement concrete are high is reduced. Meanwhile, the cement concrete prepared by the invention further has excellent chlorine salt corrosion preventing performance.