37results about How to "Fully roasted" patented technology

The invention relates to a manganese ore roasting rotary kiln system, comprising a batching system, a feeding system, a rotary kiln, a tail gas dedusting system and a gas burner, the batching system includes a batching belt scale, the batching belt scale is provided with a quality detection device, and the feeding system includes Disc feeder and feeding chute, tail gas dust removal system includes cooler, bag filter, induced draft fan and chimney, gas burner includes gas burner and control valve group, cooler is equipped with kiln tail gas detection device, outlet The kiln tail gas detection device detects the content of various flue gases in the kiln tail gas, and the quality detection device detects the quality of manganese ore for batching. When the smoke content in the kiln tail gas exceeds the preset value, it means that the roasting reaction in the rotary kiln is insufficient. By adjusting the disc feeder and the feeding chute, feed the rotary kiln to increase the quality of manganese ore in the rotary kiln, so that the roasting reaction in the rotary kiln is more sufficient, thereby reducing the discharge of flue gas, saving costs and resources, and reducing environmental pollution.

The invention discloses a method for preparing mixed rare earth chloride from Baiyan Obo rare earth concentrate, comprising: mixing Baiyan Obo rare earth concentrate with concentrated sulfuric acid at a mass ratio of 1:(0.7-1.5) and performing three-stage roasting to obtain rare earth roasting ore; after leaching and removing impurities, the obtained rare earth roasted ore is filtered and slag removed, and the filtered filtrate is extracted and transformed to obtain raffinate and loaded organic phase; the loaded organic phase is back-extracted with hydrochloric acid to obtain mixed rare earth chloride solution. The invention adopts low-temperature external heat roasting and the heat source and materials move countercurrently, effectively reducing energy consumption; the three-stage roasting method can further promote the full decomposition of rare earth concentrates, avoid materials sticking to the kiln, and at the same time make the materials roast more fully and effectively reduce tail gas discharge; continuous leaching and countercurrent impurity removal can effectively improve the recovery rate of rare earth concentrate.

The invention discloses a method for recycling waste foundry sand through a compound roasting device. The method for recycling the waste foundry sand through the compound roasting device comprises thefollowing steps that S1, materials enter a receiving tank through a material uniformizing plate, then enter a feeding protection device through an impeller and finally enter a horizontal combustion chamber; S2, the materials are blown and boiled through hot air from the bottom of the combustion chamber to flow from one end of the combustion chamber to the other end of the combustion chamber, andthree-stage roasting is conducted in the flowing process of the materials, wherein the temperature for the first stage of roasting is 300-400 DEG C, and the time for the first stage of roasting is 10-20 s; the temperature for the second stage of roasting is 600-800 DEG C, and the time for the second stage of roasting is 180-240 s; and the temperature for the third stage of roasting is 850-900 DEGC, and the time for the third stage of roasting is 10-20s; and S3, the roasted materials enter an air preheating chamber, exchange heat with cold air to be cooled to 200-300 DEG C and then are discharged, and high-temperature waste gas is exhausted after heat exchange. According to the method for recycling the waste foundry sand through the compound roasting device, the discharge temperature is lower than 300 DEG C, and the furnace temperature can be increased rapidly and can be increased to the material roasting temperature within 30 min; and the exhausted waste gas has a low temperature andcontains few hazardous substances.

The invention provides continuous quick roasting equipment for powder or particle materials, and the equipment is suitable for the field of lithium batteries. In the equipment, the to-be-roasted materials fall into roasting discs on the top from distribution hoppers, rotary shafts below the current roasting discs are controlled to rotate after roasting is carried out for a period of time, the materials in the discs are poured into roasting discs on the lower layer and continue to be roasted, similarly, the materials in the roasting discs on the second layer continue to be poured into roastingdiscs on the third layer, the operation is conducted repeatedly till the materials in roasting discs on the lowermost layer are poured out, finally the materials fall out of discharge hoppers at the bottom, and the process is carried out repeatedly; and if the current roasting discs contain the materials, only after the materials in the discs are poured to the roasting discs on the lower layer canthe roasting discs receive the materials from the roasting discs on the upper layer. As the materials scatter into the roasting discs of the lower layer when transferred from one roasting disc to thenext roasting discs, the materials are roasted in a furnace more safely through a plurality of cycles, the effect is better, and besides, as the materials are continuously roasted, the working efficiency is improved.

The invention relates to a microwave high-temperature roasting reduction method for nickel-containing sludge, which mainly uses a double-cavity microwave high-temperature roasting method to fully utilize the waste heat of high-temperature roasting, so that the heated nickel-containing sludge can be dehydrated again before entering the microwave field , and at the same time achieve the best microwave absorption state, effectively avoid the slow temperature rise phenomenon caused by poor material absorption characteristics in the low temperature stage, increase the heating efficiency, and can effectively eliminate the disadvantages of a small amount of microwave radiation leaking from the gas outlet in traditional equipment. In the present invention, dry air is introduced during the heating and roasting process, so as to fully preheat the nickel-containing sludge and improve the high-temperature roasting effect of the nickel-containing sludge. The invention utilizes microwave heating technology to enrich valuable metals, and at the same time peels off the coating layer formed by gelled insoluble matter and gangue components in the material, providing conditions for the extraction of valuable metals in waste residues.

The invention pertaining to the field of metallurgy and chemical industry technology provides a method of recovering indium and germanium from alkalescence smudgy slags.The method comprises processes of neutralizing, scouring, drying, briquetting, high-temperature reducing and volatilizing, oxidizing, dust collecting and the like. The method has advantages of simple technological operation, smallequipment investment, no-generation of secondary pollution and the like.

The invention discloses a low-grade iron ore beneficiation equipment and a method thereof. The equipment includes a No. 1 furnace, a No. 2 furnace, and a cooling reduction system. The roasted material enters the cylinder of the No. 1 furnace through the top of the No. 1 furnace for distribution, dehydration, drying, preheating and low-temperature roasting. After low-temperature roasting, the roasted material and reducing agent enter the No. 2 furnace, where they are mixed and reduced, and then enter the cooling reduction system. The reduced roasted material passes through the reduction pipe of the cooling reduction system for secondary supplementary reduction, and then passes through the cooling pipe for cooling, and then is sent to the quenching pool for quenching operation. Cloth, dehydration, drying, preheating, low-temperature roasting, unloading, reduction, secondary reduction and cooling operations are all carried out in a rotating state. The invention can overcome the technical defects of poor beneficiation effect on low-grade iron ore, low beneficiation recovery rate and large waste of resources in the existing beneficiation method.

The invention relates to a necking-type rotary kiln for vanadium extraction of stone coal. The technical scheme adopted by the invention is as follows: a left necking-section kiln body, a straight barrel-section kiln body and a right necking-section kiln body of a kiln body (3) are of a coaxial overall structure; a material outlet (9) is formed at a position adjacent to the left end of the kiln body (3), and a material inlet (1) is formed at a position adjacent to the right end of the kiln body (3); the left end of the interior of the kiln body (3) is coaxially and fixedly provided with a sleeve-type burner (10), and the center of the end face of the right end of the kiln body (3) is provided with a fume outlet (2); the excircle of the straight barrel-section kiln body is provided with a first jockey pulley group (6) and a second jockey pulley group (4); the first jockey pulley group (6) is mounted on a foundation platform (8) by virtue of a rotation pair (7); a bracket of the second jockey pulley group (4) is articulated with a piston rod of a hydraulic cylinder (5). The necking-type rotary kiln for vanadium extraction of stone coal has the characteristics of prolonging the burning time of materials in the rotary kiln, regulating the inclination angle alpha of the central line of the rotary kiln and improving the low-price vanadium conversion rate.