321 results about "Carbonatation" patented technology

The invention provides a method for preparing high base number (TBN400) synthetic calcium alkyl-benzene sulfonate. The method comprises the following steps of: adopting a mixed acid of long-chain linear alkyl-benzene sulfonic acid and high-boiling heavy alkyl-benzene sulfonic acid, calcium oxide and/or calcium hydroxide, low-carbon alcohol, alkaline-earth metal halide or nitrate, and a mixture of alkaline-earth metal alkylphenol or alkaline-earth metal alkylphenate and polyisobutylene succinic anhydride for a neutralization reaction in the presence of a solvent and cutback oil at a temperature of between 40 and 80 DEG C; then, passing through carbon dioxide to a product of the neutralization reaction at a temperature of between 40 and 60 DEG C for a carbonation reaction; and producing high base synthetic alkyl-benzene sulfonate with a total base number (TBN) of 400mgKOH/g by adopting a process of a one-step method. The product is divided into high-base number (TBN400) synthetic alkyl-benzene sulfonate containing chlorine and high-base number (TBN400) synthetic alkyl-benzene sulfonate without the chlorine. The product produced by adopting the method with low viscosity, small turbidity, easy filtration, light color and no skin formation has the advantages of excellent high-temperature detergency, excellent anti-foaming property and excellent heat storage stability.

The invention relates to a method for preparing calcium sulfonate with high base number. In the method, alkyl benzene sulfonic acid and/or petroleum sulfonic acid serve as raw materials, low molecular alcohol serves as accelerating agent, calcium oxide and/or calcium hydroxide serve as calcifying agent; firstly, neutralization reaction is carried out to generate calcium sulfonate; then carbonation reaction is carried out for twice, post-treating agent is added for reaction; finally, alcohol, water, solvent and solid residue are removed to obtain the calcium sulfonate with high base number. The product of the invention is especially suitable for preparing lubricating grease, can shorten conversion time of calcium sulfonate crystal form, improve high-temperature bproperty and anti-moisture performance of the lubricating grease and satisfy the demands of high-performance lubricating grease.

The invention discloses a carbonated steel slag aggregate and a preparation method thereof. The method comprises the following steps: sieving steel slag subjected to iron separation, taking particles with size between 0.5-25 mm particle for high pressure water flushing, and naturally drying the particles; immersing the dried steel slag particles in a mixed solution of 20-300 g/L caustic soda and 60-300 g/L sodium carbonate for 24 h, and maintaining the temperature at 20-60 DEG C; draining the soaked steel slag particles, immediately placing the particles in a sealed carbonation reactor, and introducing CO2 gas with purity over 99.9% for curing at the temperature of 70-90 DEG C for 0.5 h, and with the CO2 gas pressure at 0.2-0.5 MPa; cooling the steel slag particles subjected to carbonation treatment under natural conditions to room temperature, so as to obtain the carbonated steel slag aggregate. The steel slag aggregate treated by the method has compact surface structure to reduce water for concrete mixing; free magnesium oxide and free calcium oxide are conversed into carbonate precipitation to eliminate the hidden trouble of adverse stability; CO2 can be stored stably; the amount of natural aggregate is reduced to save nonrenewable resources; and the method has easily available raw materials and simple process.

The invention relates to a method for catching carbon dioxide by a pressurized fluidized bed combustion combined recycle generating system, which is a method for catching the carbon dioxide by using CaO generated by calcining limestone or dolomite aiming at a gasification/semi-coking pressurized fluidized combustion combined recycle generating system of a coal pressurized part, coal enters into a pressurized fluidized bed gasification furnace using air as gasifying agent so as to be gasified to generate coal gas and semicoke, the coal gas is combusted after being purified to produce high-temperature fuel to enter a combustion turbine for applying work and generating electricity. Exhaust gas containing CO2 enters into a carbonatation furnace and a calciner double fluidized system, CO2 in the exhaust gas is catched by using circulation carbonatation/calcining reaction of CaO. Steam produced by a coal gas cooler and the double fluidized bed system enters into the turbine system for applying work and generating electricity, therefore, a fuel gas/steam combined recycle generating system catching CO2 is formed. The system has high generating efficiency and low energy consumption, and can realize near-zero exhaust of a plurality of pollutants of SO2, CO2 and the like.

A technology for producing sodium bicarbonate from mirabilite comprises steps as follows: mirabilite and distillation waste liquor mixed liquor is used as a raw material, sodium carbonate is added to the solution after absorption of ammonia, magnesium, iron and calcium ions in the solution are removed after the solution is subjected to a precipitation reaction at 15-50 DEG C, and a refined solution is obtained; carbon dioxide is added to the refined solution for carbonatation, and sodium bicarbonate solids and heavy alkali mother liquor are obtained through separation after the refined solution is subjected to a replacement reaction at 15-50 DEG C; lime is added to the heavy alkali mother liquor, and ammonia gas, carbon dioxide, calcium sulfate and distillation waste liquor are obtained after distillation reaction at 15-120 DEG C; ammonia gas and carbon dioxide are recovered to ammonia absorption and carbonatation procedures respectively; the distillation waste liquor and mirabilite in Step A are mixed to be recycled. The technology has the characteristics that mirabilite is directly utilized, ammonia is recycled, the comprehensive utilization rate of distillation waste liquor waste is high, the production cost is low, the waste residue discharge is low, the technology is environment-friendly, and the like.

The present invention provides a method of carbonatation treatment for steel slag, and comprises the steps: in a boiling-bed reactor, under the temperature of 350 to 800 DEG C and the pressure atmosphere 0.1 to 3.6 and under the condition of 5 to 25 percent of the vapor, the steel slag with the particle diameter being less than or equal to 15 mm reacts with the carbon dioxide for two to twelve hours. The present invention adopts the one-step carbonization in the boiling bed to substitute the conventional reactions with a hydration step and then a carbonization step, thus greatly shortening the carbonization time of the steel slag; the industrial waste gas and the stack gas (the valid compositions are carbon dioxide, and containing certain vapor when the temperature of the gas is more than 100 degrees centigrade) are used as the gas source, which reduces the exhaustion of the greenhouse gas carbon dioxide and adequately uses the surplus heat, while completing the carbonization of the steel slag; moreover, the operation is flexible and convenient, and the carbonization degree of the steel slag can be controlled according to the requirements of different application areas of the steel slag.

Despite the excellent properties associated with Magnesium OxyChloride (Sorel) based cements and Magnesium OxySulfate based cements, water and corrosion resistance has been limiting factors for achieving greater commercial applications. Such issues can be addressed by incorporating various alkali metal phosphates, such as Magnesium mono- or dihydrogen phosphate (MgHPO₄ or MgH₂PO₄) with alkali metal fatty acids; such as Magnesium Stearate; and metal or alkali metal sulfates such as Aluminum Sulfate or Magnesium Sulfate. Water resistance is further enhanced by either pre-carbonating the mix water or the liquid magnesium chloride phase of the cements, or by adding a carbonate into the powder phase. Accelerated cure of this system has also been obtained by using various inorganic metal oxides. Additionally, improved corrosion resistance is achieved through the use of certain phosphates, zeolites, nitrites and other novel additives.

The invention discloses a method for preparing high-purity lithium carbonate from salt lake brine. The method comprises the following basic processes in sequence: concentrating the salt lake brine to quickly separate crude lithium carbonate; gradually alkalizing at different grades; precisely controlling the precipitating point; and carbonating to obtain high-purity lithium carbonate, wherein if the metal ion is completely precipitated, the prepared lithium carbonate has the purity up to 99.9% and can be directly applied to the production of lithium batteries; and the recovery rate of Li<+> is also up to about 80%. The method is simple in technology and process, lower in cost, and easy for industrial production; few chemical agents are used in the technology; especially, new metal ion impurity cannot be introduced while ammonia water serves as the alkali liquor; and the technological process is carried out in closed loop, so that ammonia exhausted in firing can be immediately recovered and then returned to the production line to be continuously utilized, except for the precipitated slag, and substances are not discharged to the outside any more, and as a result, no disadvantage influence is brought to the outside environment.

The invention belongs to the preparation of inorganic metallic compound and the processing filed of mineral resource, in particular to a preparation method for titanium dioxide (titanium pigment) through high titanium slag and sodium hydroxide without pollution. The invention is characterized in that the high titanium slag is taken as the raw material; the high titanium slag and the sodium hydroxide having temperature range from 350 DEG C to 550DEG C are reacted to prepare a medium product; the medium product is then washed through water(or carbonatation), acid solubled, reduced, hydrolyzed and burned to prepare anatase or rutile titanium dioxide. The alkali circulation, the acid circulation and the separation technology of the invention greatly reduce the production energy consumption, simplify the production process, reduce the device investment, and increase the technology maneuverability, thereby providing an effective method for the comprehensive use of titanium resource and the preparation of titanium dioxide(titanium pigment).

A gasification-liquefaction disposal method, system and equipment for MSW are disclosed. The method involves the MSW pretreatment of dehydrating and separating, thus reducing water and inorganic substance content of the waste. Then, the MSW is introduced into a plasma gasifier (23) by a carbon dioxide air-sealed feeding device (13) and gasified therein to obtain hydrogen-rich syngas. The hydrogen-rich syngas is then cooled, deacidified, dedusted and separated to obtain carbon dioxide. Then, the hydrogen-rich syngas is catalyzed to produce methanol product in a methanol synthesis reactor (52). The separated carbon dioxide is sent back to a carbonation reaction chamber (2007) of a gasification system to perform carbonation reaction with calcium oxide, thereby releasing heat to provide assistant heat energy for gasification and avoiding greenhouse gas from being discharged into environment. Exhaust gas is returned to the plasma gasifier (23) for remelting treatment, thus forming a closed-loop circulation production system and realizing the disposal of the MSW with zero discharge and no pollution, thereby avoiding dioxin pollution and converting the MSW to chemical raw materials and fuel needed by mankind The method, system and equipment are suitable for harmless and recycling disposal of MSW, industrial high polymer waste, composting waste and waste in waste sorting sites.

The invention provides a highly active potassium base solid absorbent for CO2 in the process of removing flue gas and a preparation method thereof. The solid absorbent takes hexagonal crystal system potassium carbonate as the active component, coal activated carbon or wood activated carbon or silochrom as a carrier; and the solid absorbent is made by a method of impregnation. The materials required by the absorbent is chemical medicine and carrier which are cheap and easy to be obtained; the preparation of the absorbent has simple process and low cost, the carbonatation temperature ranges from 60 DEG C to 80 DEG C, while the regeneration temperature ranges from 100 DEG C to 200 DEG C, and the absorbent belongs to a low-temperature absorbent. Under the temperature, the absorbent is not easy to lose activity, and can maintain a higher transformation ratio after multiple circulations. The highly active potassium base solid absorbent for CO2 in the process of removing flue gas and the preparation method provide a key technology for the application of the technique about removing the CO2 by a dry method for an alkali metal base absorbent and has a wide application prospect.

The invention discloses a method for preparing lithium carbonate and a ternary precursor by recycling a waste ternary lithium battery, and belongs to the field of solid waste recycling. Graphite and abinder carried in black powder obtained after pretreatment of a waste ternary battery are adopted as reducing agents, and the structure of the ternary material is destroyed through self-reduction phase inversion; lithium carbonate is converted into lithium bicarbonate which is easy to leach with water by adopting a carbonation water leaching method, so as to realize the preferential leaching of lithium; and sulfuric acid leaching is directly performed on the material subjected to lithium extraction without adding a reducing agent to obtain a nickel-cobalt-manganese solution. Copper, iron, calcium and other impurities in the solution are deeply removed through an impurity removal procedure, the content of aluminum and magnesium in the solution is controlled, then nickel, cobalt and manganese in the solution are extracted into an organic phase through synchronous extraction, a nickel sulfate solution, a cobalt sulfate solution and a manganese sulfate solution are obtained after reverseextraction is conducted through sulfuric acid, and a high-quality ternary positive electrode material precursor can be prepared after the metal proportion is adjusted. The method provided by the invention has the advantages of high recovery rate of valuable metals including lithium, nickel, cobalt and manganese, short flow, good product quality, economy and environment-friendliness.

The invention belongs to the field of the comprehensive utilization of coal series kaolin, and in particular relates to a method for preparation of ultrafine alumina and white carbon black through an alkaline method by utilizing coal-based kaolin. The method comprises the following steps: carrying out crushing, roasting, alkaline leaching and filtration on the coal series kaolin, thereby obtaining a sodium silicate solution and alkali leaching residues; carrying out carbonatation treatment on the sodium silicate solution, thereby obtaining an orthosilicic acid precipitate filter cake and a desilicication solution; aging and roasting the orthosilicic acid precipitate filter cake, thereby obtaining the white carbon black; treating the alkali leaching residues by utilizing a soda-lime sintering process; carrying out self-pulverization, water quenching and filtration on the sintered clinker aggregates, thereby obtaining a NaAlO2 solution; carrying out the carbonation treatment on the NaAlO2 solution; and finally roasting the carbonated NaAlO2 solution, thereby obtaining the ultrafine alumina. According to the production method, the requirement to equipment is low; and all byproducts are recycled, so that the zero discharge is realized and the energy consumption is low. Thus, the method is economic and environment-friendly. In addition, the comprehensive utilization rate of resources and the additional value of the product are high.

The invention provides a novel, steam-assisted production methodology and associated compositions and methods of use in the manufacture of carbonatable or non-carbonatable metal silicate or metal silicate hydrate (e.g., calcium silicate or calcium silicate hydrate) compositions. These metal silicate compositions and related phases are suitable for use hydraulic, partially hydraulic or non-hydraulic cement that sets and hardens by a hydration process, a carbonation process or a combination thereof, and may be applied in a variety of concrete components in the infrastructure, construction, pavement and landscaping industries.

The invention discloses an ammonia circulation-based method and device for carbonating fixation of CO2 in coal-fired flue gas. The method comprises the following steps that ammonia water is sprayed for absorbing CO2 in the coal-fired flue gas, part of absorption liquid generated in reaction is recycled for use, the rest of the absorption liquid flows into a regeneration pool through tower bottom so as to be reacted with added carbide slag slurry to be converted into calcium carbonate and ammonia water, after sediment through a sedimentation basin, supernatant liquor which is rich in ammonia flows into an absorption liquid mixed pool, and then a proper amount of ammonia water is added into the absorption liquid mixed pool so as to be sent to a CO2 absorption tower through a pump for reuse, after filtration of calcium carbonate sediment in the sediment pool, calcium carbonate is recycled, and the filtrate is sent to the absorption liquid mixed pool for reuse. According to the method, CO2 in the coal-fired flue gas is directly converted into calcium carbonate under normal temperature and pressure by taking ammonia water as an absorbent and taking carbide slag as a regenerant. Compared with the technology that CO2 of high concentration is obtained by ordinary ammonia water absorption and regeneration and carbonation seal is performed, the method has obvious technical economy advantages.

The invention discloses a method and device for immobilizing CO2 in industrial tail gas by enhancing mineral carbonation. The device comprises a packed column absorber, a mineral leaching tank, a carbonation reactor and a belt type filter. The method comprises the steps of: enabling the industrial tail gas containing CO2 to enter the packed column absorber filled with immobilization carbonic anhydrase, rapidly transforming the CO2 into HCO3<-> under the catalysis action of the carbonic anhydrase; with a weak acidic solution containing the HCO3<-> as a mineral leaching agent, effectively leaching calcium ions from minerals in the mineral leaching tank under the action of ultrasonic waves to form a slurry enriching Ca<2+>; introducing the slurry enriching Ca<2+> into the carbonation reactor, adding a calcium-containing alkali material, regulating the pH of the slurry to be 7-9 to ensure that the HCO3<-> is transformed into CO3<2->, and generating a carbonation reaction with the Ca<2+> leached from the minerals to generate CaCO3. The invention can promote the CO2 to be rapidly transformed into the HCO3<->, can promote the calcium ions to be leached from the minerals and the carbonation reaction, and further realizes that the CO2 in the industrial tail gas is immobilized through direct carbonation under normal pressure.

The invention discloses a method for extracting aniline, sodium carbonate and potassium carbonate from mixed caustic sludge in the production of indigo, which relates to a comprehensive treatment technology in the production of indigo. The adopted technical proposal is that the mixed caustic sludge forms aniline vapor and water vapor after calcination, water is on the upper layer and aniline is on the lower layer by natural settling after condensation, aniline is drawn out and put into a reaction kettle to produce sodium sulfanilate, dry mixed alkali produced is dissolved with water and filtrated, and CO2 is introduced for carbonatation treatment so as to produce potassium carbonate and sodium carbonate which are separated out after concentration, and finally the potassium carbonate and the sodium carbonate are dried, calcinated, naturally cooled and packaged. The method of the invention is characterized by simple extraction method, easy purchase of equipment, low cost, realization of cyclic economy, thus being beneficial to 'recycle and reclamation' and environmental protection. The method of the invention is applicable to the comprehensive treatment of indigo production industry.

The invention discloses a method for clean method for producing sodium bicarbonate and sulphur by means of Glauber salt wet method for reducing the emission of CO2 and avoiding the discharge of wastewater, which comprises the following steps: A, sodium sulphide preparing process, B, hot carbonatation process, C, sulphur preparing process, D, cold carbonization process, and E, mother liquor purifying. Glauber salt coal is reduced and calcined into sodium sulphide, and the sodium sulphide solution is heated and carbonized into a mixed solution with the soda as the main component by use of sodium bicarbonate, then the mixed solution is cold-carbonated by CO2 to separate out NaHCO3 crystal, which is dried to finally obtain the soda in conformity with relevant standard. The production method has the advantages of simple process, environmental friendliness, no pollution, full circulation of the mother liquor, and no wastewater discharged.

The invention discloses a preparation method of a carbon dioxide composite calcium-base absorbent. Citric acid and nitrate are used as raw materials to prepare the composite calcium-base absorbent doped with other metal oxides by a sol-gel process. The preparation method comprises the following steps: by using calcium nitrate as the main raw material, other metal nitrates as a modifier and citric acid as a complexing agent, carrying out solution mixing, dehydrating by evaporation to obtain a gel, drying and carrying out heat treatment on the gel, and calcining at 800 DEG C in an air atmosphere for 3 hours, thereby obtaining the carbon dioxide composite calcium-base absorbent. The carbon dioxide composite calcium-base absorbent prepared by the method disclosed by the invention has high carbon dioxide absorption capacity and stable reaction activity, and has high CO2 capture rate in multiple-circulating calcining/carbonating reaction process; and the carbon dioxide composite calcium-base absorbent has favorable properties in the aspects of CO2 capture efficiency, mechanical strength, caking resistance and the like in the circulating calcining/carbonating process.

The invention discloses a method for preparing sodium carbonate by supplementing CO2 to flue gas. The method comprises the following steps: carrying out de-dusting, desulfurizing and cooling on CO2-containing flue gas, increasing the pressure to be 0.05-0.35 MPa, directly filling the flue gas into the middle and the upper part of a sodium carbonate preparation carbonizing tower, producing a carbonation reaction, enabling a reaction product to continue to pass through the lower section of the carbonizing tower to finish the carbonation reaction with high-concentration CO2-containing gas to obtain sodium hydrogen carbonate, and calcining sodium hydrogen carbonate to obtain sodium carbonate. According to the method, during sodium carbonate production, the problem of CO2 deficiency is successfully solved, the equipment investment and the power consumption are greatly reduced, the CO2 emission is reduced, the utilization rate of sodium chloride is high, both the energy consumption and the cost are low, and the economic feasibility is high.

The invention discloses a method for modifying the surface of nano calcium carbonate. The method comprises the steps that 1, lime milk is added to a bubbling carbonatation reaction kettle, mixed gas containing carbon dioxide is introduced to the reaction kettle for a carbonatation reaction, carbonatation is conducted till the pH is equal to 7.0, carbonatation is completed, and a nano calcium carbonate suspension solution is obtained; 2, a stabilizer is added to the nano calcium carbonate suspension solution, the temperature is controlled within 50-60 DEG C, and heat preservation is conducted for 20-30 min; 3, a fatty acid modifier is heated and melted in water, an emulsifier is added to the fatty acid modifier, stirring is conducted for 10-30 min, and a modifier emulsion is obtained; 4, the nano calcium carbonate suspension solution obtained in the second step is added to the modifier emulsion, stirring is conducted for 30-60 min, and then through filter-pressing dehydration, drying and smashing, a nano calcium carbonate product is obtained. The prepared nano calcium carbonate has the advantages of good dispersity and processability, low oil absorption value, high thixotropy and activation rate, good stability, pH value close to neutral and the like. The method is low in production cost and simple in technology, facilitates industrial production and has good economic, social and ecological benefits.

The invention discloses a novel method for comprehensively utilizing potassium feldspar. According to the method, NaOH-Na2CO3 is used for being mixed with sub-molten salt to decompose the potassium feldspar, and potassium feldspar decomposing mother liquid and kankrinite are obtained; the potassium feldspar decomposing mother liquid is subjected to carbonatation and filtration to obtain filter liquid containing potassium bicarbonate and salic filtering slag; filtering liquid is subjected to evaporation, crystallization and drying, and potassium carbonate can be obtained; meanwhile, the salic filtering slag is subjected to supplementing addition of KOH, Al(OH)3 and H2O for regulating the mixture ratio of the K2O/SiO2, the Al2O3/SiO2 and the H2O/SiO2; at a certain temperature, aging and crystallization are performed for a period of time; W molecular sieves are synthesized. The method has the characteristics that the decomposing temperature is low; the potassium ion dissolving rate is high; the decomposing mother liquid can be easily acidified; the product added value is high; the raw material utilization rate is high; no waste liquid and no waste slag are produced. The method conforms to the green production principle, and has good potential economic benefits.

The invention relates to a high base number (TBN300) sulfuration alkylphenol calcium and a preparation method thereof; the chemical structural formula of the sulfuration alkylphenol calcium is shown at right, and alkyl phenolic compound, shielding phenolic compound, calcium oxide and/or calcium hydroxide and sulfur are put into a system containing solvent and diluent oil to have sulfuration/neutralization reaction to generate phenate intermediate; carbon dioxide is pumped into the system to have carbonatation reaction; alkyl polylol is added to take part in the reaction when the sulfuration/neutralization reaction is carried out, or the alkyl polylol is respectively added to take part in the reactions when the sulfuration/neutralization reaction and the carbonatation reaction are carried out; long chain carboxylic acid is added to take part in the reaction when the sulfuration/neutralization reaction or the carbonatation reaction is carried out, or the long chain carboxylic acid is respectively added to take part in the reactions when the sulfuration/neutralization reaction and the carbonatation reaction are carried out; the products are refined to prepare the finished goods. The sulfuration alkylphenol calcium is characterized by high base number, low viscosity and precipitation number, good heat storage stability, and the like; as having excellent cleanliness, hydrolysis invariability, alkali retentivity and good inoxidability, the sulfuration alkylphenol calcium causes no environmental protection problem when in use, and belongs to environment-friendly products; as one-step technique is adopted, the reactions are moderate, and filtration is easy.

The invention discloses a preparation method of all-solid-waste-based carbonated unfired lightweight aggregate, which comprises the following steps: (1) grinding active component type solid waste, lightweight filling type solid waste and alkali-activated solid waste, and mixing to obtain mixed solid waste powder; and (2) granulating the mixed solid waste powder and water to obtain particles, pre-curing the particles, and then carrying out CO2 mineralization curing to obtain the all-solid-waste-based carbonated unfired lightweight aggregate, wherein the active component type solid waste comprises blast furnace slag, steel slag or furnace slag; the light filling type solid waste comprises fly ash, river mud or red mud; and the alkali-activated solid waste comprises carbide slag. The raw materials are all selected from solid wastes, the alkali-activated solid wastes are used for replacing traditional quick lime, sodium hydroxide, water glass and the like as an alkali activator, and a CO2 mineralization strengthening technology is adopted, so that the carbon sequestration potential of the solid wastes is fully exerted, natural resources are saved, and the all-solid-waste-based carbonated unfired lightweight aggregate with good compressive strength is prepared.

A comprehensive iron-aluminium paragenetic mineral utilization method belongs to the technical field of metallurgy. The comprehensive iron-aluminium paragenetic mineral utilization method is carried out according to the following steps: iron-aluminium paragenetic mineral is ground and made into pellets, and reducing gas is filled to pre-reduce the pellets, so that pre-reduced mineral is obtained;the pre-reduced mineral and lime are put into a reduction and melting furnace, and with oxygen as carrier gas, pulverized coal is jetted to carry out melting and reduction, so that molten iron and high-temperature aluminium-containing molten slag are obtained; the high-temperature aluminium-containing molten slag is cooled to normal temperature and naturally powdered, so that slag is obtained, and the slag is put into sodium carbonate solution and leached, so that leachate and leaching residue are obtained; the leachate is desiliconized under normal pressure and desiliconized under medium pressure, so that refined liquor is obtained; CO2 is filled into the refined liquor to carry out carbonation decomposition, so that decomposed mother liquor and aluminium hydroxide are obtained, and the aluminium hydroxide is roasted, so that alumina is produced; sodium carbonate is added into the decomposed mother liquor to replenish alkali, and the produced sodium carbonate solution is used for leaching. The comprehensive iron-aluminium paragenetic mineral utilization method not only can guarantee the high-efficiency dissociation and extraction of iron and aluminium, but also is feasible technically and economically, and the iron-aluminium paragenetic mineral resource in China is effectively and comprehensively utilized.