1603 results about "Tunnel kiln" patented technology

Disclosed are a high-performance expansion cement clinker, a manufacturing method of the cement clinker, a series concrete expansion agent and a manufacturing method of the concrete expansion agent. The high-performance expansion cement clinker is made as follows: firstly, 50-90 wt% of limestone, 1-20 wt% of bauxite, 5-30 wt% of gypsum and 1-5 wt% of iron powder are grinded together into raw meal, then the raw meal is calcined at 1250-1400 DEG C in a rotary kiln, a tunnel kiln or a roller kiln to get the cement clinker. The cement clinker is milled alone or in combination with sulfur calcium aluminate cement clinker, calcium aluminate cement clinker, anhydrite, calcined gangue, alunite, calcined kaolin and hydration heat inhibiting additives until the specific surface area reaches 200-400m2/kg, so as to get the series concrete expansion agent. The high-performance expansion cement clinker disclosed in the invention is calcium hydroxide-hydrated calcium aluminate sulfate double-expansion source expansion clinker, which is fast in expansion rate and high in expansion efficiency and uses less bauxite of scarce resources; besides, the calcination temperature is low to avoid calcium oxide dead burning, so the preparation is safe and reliable.

The invention relates to a chemical industrial waste salt refining process which comprises the following steps: pretreating high salt wastewater generated in the production process of aminobenzene ether and p-nitrophenol so as to adjust the pH value, adsorbing by using activated carbon, kieselguhr or macroporous resin, removing organisms and organic salts in the wastewater, reducing the COD of the wastewater, neutralizing the high salt wastewater, performing multi-effect evaporation or mechanical recompression so as to evaporate and crystallize, and centrifuging a solid salt; performing high-temperature calcination on the centrifuged solid salt in a rotary kiln or a tunnel kiln, thereby decomposing and oxidizing the organisms at a high temperature, further thoroughly combusting the tail gas generated through calcination in a heat accumulation type tail gas combustion furnace, preheating and recycling the tail gas, performing spraying absorption, dissolving the calcinated salt with water so as to prepare a saturated solution, filtering by using a precise filter, directly supplying the filtrate to ionic membrane caustic soda for use, or performing multi-effect evaporation or mechanical recompression on the filtered saturated salt water so as to evaporate, crystallize and purify, and performing centrifugation, thereby obtaining high-quality solid sodium chloride.

The invention relates to a novel industrialized method for comprehensively utilizing vanadium titanium iron ore concentrate. Raw material, an additive and a solid reducing agent are made into a higher-density round ingot through a full automatic press after being mixed evenly by an edge mill; the mixed material is charged into a gradient alloy can and is directly reduced in a tunnel kiln; and after being crushed, the reduced ingot is ground and is magnetically separated to obtain high-quality sponge iron with 92 to 96 percent of TFe and material containing abundant vanadium and titanium with 2.8 to 3.4 percent of V2O5 and 48 to 49 percent of TiO2. After being cold formed, the sponge iron is used for electric steelmaking or is sold as iron powder through deep processing. The material containing abundant vanadium and titanium can be used for producing V2O5 with the purity more than or equal to 98.5 percent through a simplified wet method vanadium extraction process; and vanadium slag with the TiO2 content more than or equal to 48 percent can be used as sulfuric acid method titanium white or other industrial raw materials. The method can greatly improve the capacity of the tunnel kiln and the service life of a charging vessel, has high comprehensive utilization degree, reliable technology, investment conservation and low production cost, energy conservation and emission reduction, and little pollution, and creates conditions for industrialization.

The invention relates to an iron powder production method by using a tunnel kiln to reduce concentrate pellets containing carbon vanadium ferrotitanium with titanium slag and vanadium pentoxide as combined products. Concentrate pellets are made from vanadium-titanium iron concentrate through crashing and damp milling. The iron powder and tailings are obtained by putting the concentrate pellets into the tunnel kiln to be reduced, crashing, wet-grinding, magnetic separation and gravity separation. The tailings are soaked with titania waste acid to eliminate remnants magnesium and iron. Then the tailings are filtrated and dried to obtain a new material. And then the new material is added with sodium salt to do salt roast and then to be soaked by water, then titanium slag and sodium vanadate are obtained respectively after the water soaking. At last, the vanadium pentoxide is obtained by ammonium vanadate precipitating and calcination deaminase to the sodium vanadate liquid. The invention eliminates the disadvantage of high energy consumption by electric furnace smelting and bad separating effect of vanadium and titanium, difficult control of vanadium and titanium trend and low yield rate of extracting vanadium and titanium through converter blowing iron molten, etc. The invention has the advantages of high yield rate of vanadium, titanium and iron and high resources utilization rate and explores a novel practical way for comprehensive utilization of vanadium, titanium and iron concentrate ore.

The invention relates to non-oriented electrical steel and a production method thereof. The non-oriented electrical steel comprises the following chemical compositions in percentage by weight: less than or equal to 0.008 percent of C, 0.15 to 2.2 percent of Si, less than or equal to 0.008 percent of Al, 0.15 to 1.5 percent of Mn, 0.004 to 0.15 percent of P, less than or equal to 0.008 percent of S, less than or equal to 40PPm of [O], less than or equal to 0.005 percent of N, less than or equal to 0.008 percent of Ti, and the balance of iron and inevitable impurities. The production method comprises the following steps of: smelting by using a converter and performing vacuum treatment; continuously casting into slabs with the thickness of 50-90 millimeters; soaking in a tunnel kiln; continuously rolling by using seven mills; coiling; performing pickling; performing cold rolling; performing recrystallization annealing; and obtaining the steel for later use. The alloy is reasonable in design and is not needed to be subjected to calcium treatment; the procedures are simple; the cost is reduced; the defect of low casting property in thin slab continuous casting-continuous rolling production can be effectively overcome; the advantages on cost and magnetic property of the non-oriented electrical steel in the thin slab continuous casting-continuous rolling production are fully shown, and the market competitiveness of the product is greatly improved.

The invention relates to a foam ceramic formed by adopting the rich tuff as the raw material and fluxing agent, foaming agent, and antioxidant as the additives at a temperature of 1,050 DEG C to 1,200 DEG C. The density of the foaming layer ranges from 300kg/m to 500kg/m<3>. The invention can form the following glazed ceramic series products after one-time calcinations: (1) the uneven culture glazed series are prepared by placing tuff blazing block or high-intensity foaming blazing block on the foaming layer; (2) the crystallite glass glazed series are formed by placing water quenched crystallite glass granules below the foaming layer; (3) the crack glazed series are formed by placing micro-hole foaming glazed powder on or below the foaming layer; the product can be produced in a crystallite glass crystallization kiln or an internal-combustion air brick tunnel kiln; with the unique decoration effect and good thermal insulation performance effect, the foam ceramic can be used for thermal insulation decoration, scenery decoration, etc.

A production technology of preparing manganeisen from low grade manganese mine. Low grade manganese mine with a metal manganese content of 15-30% is dried, added with reducing agent, catalyst, solvent and bonding agent and mixed well to prepare a composite material; the low grade manganese mine composite raw material is placed in a rotary kiln or a tunnel kiln, heated to 400+/-80 DEG C by energy of gas or natural gas with an air excess coefficient controlled at 0.9-1.0, with a heating speed of 1-4 DEG C / min at a normal temperature, wherein the furnace is kept in a weak reducing atmosphere, and insulated for 0.5-5 h; then the low grade manganese mine composite raw material is heated to 750+/-80 DEG C with a heating speed of 2-5 DEG C / min and insulated for 0.5-5h; finally the low grade manganese mine composite raw material is heated to 1100+/-150 DEG C and insulated for 0.5-6h; gas pressure in the furnace is kept at 0.12-0.15 MPa during heating and insulation; after the reaction, the material is cooled and treated with magnetic separation to obtain the manganeisen and tailings. The manganeisen comprises 15-20% of metal Fe, 65-75% of metal Mn, less than 5% of gangue, 1.0-6.5% of carbon, less than 0.15% of phosphor and less than 0.15% of sulfur, can be used as a raw material for smelting of high-quality manganeisen by a converter or an electric furnace and has low cost and wide application prospect.

The invention discloses a method which takes marbles as raw materials for producing calcium oxide and relates to a production method of the calcium oxide. The marbles having the content of the CaCO3 that is more than 95 percent and the whiteness that is higher than 92 percent are chosen as the raw material, and the marbles are broken into 20 to 300mm<3>; the ores are put into a tunnel kiln, a puffing kiln, a rolling plate kiln or a drawer kiln and are preheated for 6 to 10 hours in a preheating section, and the temperature in controlled under 0 to 600 DEG C, and then the ores are put into a calcination section and are heated and calcined for 8 to 12 hours by gas fuels or solid fuels, and the temperature is controlled under 600 to 1100 DEG C, finally the ores are put into a cooling section to be cooled. The method for producing calcium oxide of the invention solves the problem that fuels and raw materials are mixed together so that the calcium oxide cannot be produced by marbles in the traditional calcining craft. Under the non-selection circumstance, the effective purity can be increased by 5 percent and the whiteness can be increased by 9 percent by using marbles for producing the calcium oxide.

A method of using nickeliferous laterite to reduce ferronickel directly in tunnel kiln relates to a method of reducing ferronickel. Comparing with high furnace smelting ferronickel and electric furnace smelting ferronickel having problems such as great invest, high manufacturing cost and produced ferronickel with high carbon content, the method of the invention is finished as: selecting nickeliferous laterite as material, the nickeliferous laterite contains 0.75-2.60% by weight of nickel, 8.00-55.0% by weght of iron; adding weight ratio of nickeliferous laterite and reductant as 1.00:0.25-0.55 into reducing pot, then putting the reducing pot in tunnel kiln, through preheating and stoving, heating reducing, cooling, taking off to get qualified reduced directly nickeliferous laterite. The invention selects natural nickeliferous laterite as material to reduce nickeliferous laterite, having advantages such as technology which easy to control, simple operation, low dissipation of energy, environment protection without pollution, low manufacturing cost, low installion cost and produced ferronickel with low carbon content.

The invention provides an energy-saving ceramic tunnel furnace. A kiln body is provided with a peheating zone, a clinkering zone and a cooling zone, wherein the clinkering zone is vertically provided with two baffle walls at two ends of a high-temperature zone of between 1,300 and 1,380 DEG C, and the baffle walls are fixed on a kiln top by using a metal hanging piece; the upper part of the high-temperature zone is isolated from the upper parts of other temperature zones, so that the temperature of the high-temperature zone is relatively stable, the temperature of the upper and lower parts is more uniform, and thus the tunnel kiln is favorable for sintering products and saving fuel gas. A combustion system is controlled by adopting full-automatic air/fuel ratios, the fuel gas and combustion air enter a fuel gas burner through precise control and mixing to be combusted in the kiln completely, so that the highest heat value is obtained, surplus air is prevented from entering the kiln, and fuel is saved. A smoke exhaust fan and a combustion fan are controlled by adopting frequency control of motor speed, so that the stability of kiln pressure, the pressure of the combustion air and sintering atmosphere is maintained, the quality of the products is improved and electricity is saved.

The invention relates to a method for producing potassium-calcium fertilizer by using potassium feldspar, limestone and phosphogypsum, and belongs to the technical fields of three-waste treatment and chemical engineering technical field. The method comprises that: the feldspar, the limestone and the phosphogypsum are mixed in certain proportion, subjected to grinding, ball forming or block forming and then baked in a rotary kiln, vertical kiln or tunnel kiln, and the sintered grog is crushed and packaged into products of the potassium-calcium fertilizer. One of main raw materials for producing the potassium-calcium fertilizer is industrial waste residue phosphogypsum, and the method has more advantages than the prior methods for producing the potassium-calcium fertilizer.

An improved method and apparatus for cooling the under-car channel of a tunnel kiln while minimizing migration of air between the above-car and under-car channels involves controlling or equalizing the mass flow of cooling air directed through the under-car channel and in particular through individual undercarriage cooling zones which can match individual heating zones of the tunnel kiln.

The invention discloses a continuous recovery device and a continuous recovery process of vanadium, molybdenum and titanium in an SCR (selective catalytic reduction) waste catalyst, wherein a crusher is connected with a secondary magnetic separation device, the secondary magnetic separation device is connected with a tunnel kiln, the tunnel kiln is connected with a smasher, the smasher is connected with an alkaline leaching kettle, the alkaline leaching kettle is connected with a suction filtration groove, the suction filtration groove is connected with a vacuum evaporation tank, the vacuum evaporation tank is connected with a vanadium sedimentation reaction tank, and the vanadium sedimentation reaction tank is connected with a molybdenum sedimentation suction filtration groove; the alkaline leaching kettle is clamped outside the reaction kettle, a top overflow opening is positioned in the upper side of the jacket, a charging opening and a filling opening are positioned in the upper part of the reaction kettle, and the filling opening is guided to the middle part of the reaction kettle by virtue of a guide pipe. According to the continuous device disclosed by the invention, the production efficiency is effectively improved, thereby facilitating subsequent automatic and continuous production. A flat plate type flue gas denitrification catalyst is continuously recovered, infiltrating water is recycled, and the water yield is greatly saved.

The invention discloses a novel sludge brick making technique which comprises the following steps that municipal sludge is subjected to dewatering conditioning and desodoration treatment; heavy metal is controlled; treated sludge pug, clay and an additive are blended to form a material; the material is fed into a brute force extrusion mixer to be mixed fully, and is ground and homogenized by brute force roll grinding and aged; the aged brick making pug is fed into an adobe making workshop to be subjected to compression moulding for adobe making; the moulded adobes are fed into a drying room to be dried; and the dried adobes are placed in a back stage of a tunnel kiln to be sintered. According to the technique, the sludge from a sewage plant is mixed with the raw clay directly, so that energy resources consumed due to sludge drying are saved; targeted improvement measures are put forwards to solve the problems of sludge dewatering, odor control, heavy metal stabilization, etc.; the quality performance and the strength grade of sludge bricks are improved by methods of optimizing a sludge blending ratio and feeding the additive, etc.; the reduction, harmlessness, reclamation and industrialization treatment goals on the municipal sludge are realized; and the sludge bricks, serving as a product, have objective economic benefits.

The invention relates to a high temperature energy-saving tunnel kiln for physical thermal circulation application. A metal tube type air preheater is arranged in a medium temperature section furnace cavity in a tunnel kiln cooling zone; a silicon carbide air preheater made from non-metallic material is arranged in a high temperature section furnace cavity in the tunnel kiln cooling zone; wherein, one end of the metal tube type air preheater is connected with a blower and the other end thereof is connected with the silicon carbide air preheater; the other end of the silicon carbide air preheater is connected with a high temperature airpipe; then preheated combustion-supporting air is connected to a high temperature combustor by a high temperature airpipe air valve through the high temperature airpipe air; a group of forced cooling blowers are arranged at the low temperature section of the cooling zone to blow wind to the high temperature zone and high temperature blowers are arranged at the medium temperature section of the cooling zone to pump hot air to a gas pipe mounting groove to heat coal gas, excess heat in the gas pipe mounting groove is connected to a blank drying room and a blank drying shed by a pipeline; wherein, the blower arranged at a preheating zone pumps excess heat and waste gas from the cooling zone and a burning zone, which enters the blank drying shed by the pipeline.

The process of making high strength anticorrosive integrated plate material includes the following steps: forming narrow timber strip with wood leftover and low grade timber and through cutting, pressure dipping timber strip in modifying phenolic resin in solid content of 10-15 % and added preservative and serving as modifier and adhesive, stoving in a circular tunnel kiln at 90 deg.c for 30-40 min to reach water content of 12-15 %, arranging in a mold to form blank, cold pressurizing at 600-800 kg/sq m pressure, curing at 140-160 deg.c, ageing and cutting and finishing. The process is simple, and the produced plate material has density of 1-1.2, high strength, high anticorrosive performance, low cost and wide application.

The invention discloses a method for preparing cellphone parts in various colors with zirconia ceramics. The method comprises the following steps: zirconia powder or zirconia powder mixed with coloring agents is injection-molded or drily pressed to prepare blanks, the blanks are immersed for dewaxing, the dewaxed blanks are sintered at a high temperature in a tunnel kiln, the sintered blanks are selectively polished or not polished, then the blanks are resintered under the atmosphere of carbon reduction, and the blanks after being resintered are polished once more to obtain titanium silver zirconia ceramics cellphone parts or black zirconia ceramics cellphone parts; if the zirconia powder is mixed with the coloring agents, the blanks after being sintered at the high temperature in the tunnel kiln are directly polished to obtain zirconia ceramics cellphone parts with colors corresponding to the coloring agents, such as pink zirconia ceramics cellphone parts or yellow zirconia ceramics cellphone parts. The method for shaping and preparing zirconia ceramics cellphone parts through the injection molding process is simple; the consistency of the sizes and the specifications of the cellphone parts is high; the appearance of the cellphone parts is delicate; the tactility of the cellphone parts is good; the cost is low; the disadvantages that existing cellphone parts fade, the paint of the existing cellphone parts is peeled, the existing cellphone parts are scratched, the existing cellphone parts are easily broken and the like, are overcome; and the method can be widely applied to cellphones in mid-to-high price ranges.

The invention provides a method for comprehensively smelting sefstromite. The method fundamentally solves the problem that the vanadium content in molten iron is difficult to increase so as not to finally extract vanadium, a valuable resource, because the conventional blast furnace smelting cannot utilize one hundred percent sefstromite by directly reducing the one hundred percent sefstromite into vanadium-titanium sponge iron by a tunnel kiln direct reduction method. The method comprises the following steps of: when the vanadium-titanium sponge iron is smelted in an electric furnace, first reducing V2O5 in slag and putting the V2O5 into steel by controlling a reducing atmosphere and then scratching away oxides of difficultly reduced elements such as Si, Al, Ti, Ca, Mg and the like along with the slag to obtain high titanium slag; and oxidizing the vanadium in the molten steel into the slag by oxidizing and blowing to improve the V2O5 content in the slag so as to provide guarantee for subsequent vanadium extraction from the slag and extremely improve the recovery rate and the recovery economic value of the vanadium. The method can also produce high-quality molten steel for developing steel grade with high added value, so the valuable resource, namely the sefstromite can be fully, effectively and rationally utilized.

The process of continuously thermal decomposing waste tire in a gas burning kiln belongs to the field of solid waste treating technology. The process includes setting cleaned and air dried waste tire and catalyst in the thermal decomposing container on a push plate, pushing the container with a hydraulic device into the tunnel kiln via a sealing cabin, moving the push plate on rollers and pushing out the thermal decomposed product; condesing the gaseous product exhausted from the kiln top in a condensator to obtain mixed fuel oil or returning the gaseous product to the kiln for use as heat source; and collecting the carbon slag from the container for preparing carbon black filler and other material. The present invention can operate continuously, has great treating capacity, low power consumption and other advantages, and may be used in treating other solid wastes.

The invention relates to a sewage treatment plant sludge sintered brick. Sintering raw materials include the following components in the absolute dry state in parts by weight: 20-30 parts of riverway sludge or deep foundation pit soil, 25-35 parts of sewage treatment plant sludge, 20-30 parts of coal gangue or coal slag, 10-20 parts of dry powder additives and 5-10 parts of mineral slag and/or furnace slag. The preparation process comprises the following steps of: mixing the sintering raw materials in proportion, and aging for 5-7 days till the water content is 13-18 percent by weight; then carrying out semihard extrusion forming to make a green brick, and then drying; and then roasting through a tunnel kiln, stably increasing temperature for 2-4 DEG C/min, and slowly roasting at 900-1000 DEG C for 7-9 hours by adopting small fire. The obtained sintered brick meets the standard of a GB13544-2011 porous sintered brick and has good self-heat preservation effect without desquamation or cracking or hoarseness.

The invention discloses a resourceful cyclic utilization technology for household and building rubbish. The technology comprises the steps that firstly, the rubbish is fermented, percolate treatment is conducted, the rubbish is conveyed into a pyrolysis gasifier, and methane is used for supporting combustion; secondly, the rubbish is combusted, and coke residues are stored and left for use; thirdly, high-temperature smoke is subjected to heat absorbing and recycled to be guided into a tunnel kiln for air drying of sintered green bricks; fourthly, the coke residues and fly ash are conveyed to the tunnel kiln for brick sintering; fifthly, recycled water and process cooling water are used for green brick manufacturing and stirring, and high-temperature steam is used for power generation; sixthly, the building rubbish is roughly broken, impurity removing is conducted, secondary fine breaking is conducted, impurity removing is conducted, and recycled aggregate is screened and used; seventhly, the recycled aggregate with the particle size being 3 mm-10 mm is used for manufacturing hollow blocks; and eighthly, recycled fine powder with the particle size being smaller than 3 mm is used for brick sintering. The resourceful cyclic utilization technology has the beneficial effects that the household rubbish, the building rubbish and the brick sintering technology are organically combined, waste water reaching the standard, the coke residues, the fly ash, the high-temperature smoke, steam and generated electricity are utilized in rubbish treatment and brick sintering, the rubbish is thoroughly utilized, secondary pollution is eliminated, the household rubbish and the building rubbish are cyclically utilized, and waste is turned into wealth.

The invention relates to a mobile tunneling kiln, comprising kiln body; moving wheel set on the two side of kiln body, by which kiln body is set on the ground railway; and power equipment set on the kiln body. Kiln body can be controlled manually and move in any time by the power equipment set on the kiln body in the invention. It is simple structure, low cost and good efficiency when power equipment is hydraulic device. Several doors of said kiln body is sealed in segmentation so that temperature in kiln body is improved quickly and adjusted or controlled.

The invention discloses a manufacturing method of high performance water percolation brick through using the wasted material, which is characterized in that the preparation technological process step goes as follows: (1) the sanitary equipment product, each kind of defective goods of wall and floor brick product and the abrasive dust of the polishing brick is carried on recycling, depositing, and ingredient examination; (2) the sanitary equipment product, each defective good of wall and floor brick product and the abrasive dust of the polishing brick is crashed to grains smaller than 10 mesh size (smaller than 1.65mm); (3) the crashed grains is as the aggregate for producing the water percolation brick, and then a certain quantity of abrasive dust of the polishing brick, clay, melting agent raw material, organic supplement and little pore forming agent are added and mixed equally to produce the powder material; (4) the powder materials are suppressed to formation on the 800-1,000 tons press through dried for 1-7 hours in the tunnel drying kiln and burned for 16-18 hours in the 1,100-1,200 DEG C tunnel kiln; (5) the finished product is carried on the quality examination and is sealed. The invention solves the problem of the recycling of all broken ceramics and the waste materials in the ceramic production process and has good promoted value.