31results about How to "High degree of decomposition" patented technology

The invention discloses lactobacillus plantarum which was collected in China General Microbiological Culture Collection Center on 25th, Sep., 2013. The collection number is CGMCC No.8242, and the collection address is No. 3, 1 Beichen West road, Chaoyang District, Beijing, Institute of Microbiology, Chinese Academy of Sciences. The lactobacillus plantarum provided by the invention has high activities of peptidase and aminotransferase. When the lactobacillus plantarum used as an auxiliary leavening agent is added into a cheddar cheese model, contents of water-soluble nitrogen, 5% PTA-SN and 12% TCA-SN in cheese are higher, protein decomposition degree can be improved effectively, flavoring characteristics of aged cheddar cheese can be formed in a short period of time, sensory scores of nut and sulphur taste of the aged cheese in the cheddar cheese model are increased, ripening period of cheddar cheese is shortened and the cost of storage can be saved.

The invention provides a method and a system for drying aerobic organisms in urban raw garbage by the aid of hot air. Organic matters in the urban raw garbage are decomposed into moisture and other inorganic matters by the aerobic microorganisms in the urban raw garbage with high-temperature biological conditioners by the aid of oxygen provided by the hot air and a formed high-temperature environment, heat is released, most of the moisture is heated and evaporated into steam by the high-temperature environment and the heat, the steam is exhausted in a wet and hot waste gas form, garbage leachate is formed by an additional part of the moisture and drained, and the purpose of drying the aerobic organisms in the urban raw garbage is achieved. The system comprises an urban raw garbage aerobic organism drying bin, a hot-air auxiliary drying device, an air feeder, an exhaust fan, a liquid delivery pump and the like. The method and the system further can be optimized by means of automatic control, waste gas preheating, photocatalytic sterilization and deodorization and the like. The method and the system for drying the aerobic organisms by the aid of the hot air have the advantages that the decomposition degree of the organic matters in the urban raw garbage and moisture evaporation capacity are high, a drying process is short, a drying effect is obvious, and the garbage is treated in a harmless, reducing and stable manner.

The invention discloses an active lactobacillus beverage preparation method and an active lactobacillus beverage prepared therethrough. The preparation method comprises the following steps: homogenizing, sterilizing and cooling fresh milk or reconstituted milk as a raw material, inoculating a starter, adding 0.01-1mass% of aseptic light calcium carbonate, and fermenting at 28-42DEG C for 48-72h to prepare a fermented milk base material; and diluting the obtained fermented milk base material with sterile water according to a volume ratio of the fermented milk base material to water of 1:1-1:9, homogenizing at 30-40DEG C under a pressure of 17-25MPa while (without) adding a sweetener and / or an essence, and filling at 10-20DEG C to obtain the active lactobacillus beverage. The active lactobacillus beverage obtained through the preparation method contains a high quantity of live bacteria, and the preparation method enhances the degradation degree of fermenting strains to milk proteins, allows the content of milk protein peptides in the active lactobacillus beverage to be high, and realizes the stability and difficult layering of the active lactobacillus beverage.

The invention discloses a high-effective pleurotus nebrodensis culture medium with algas, which includes the following components, by weight, sugarcane residue, brewer's grain, alginic acid-polyacrylamide composite porous micro-spherical loofah sponge fibers, chlorella powder, sargassum, hydrilla verticillata powder, kelp powder, cyanobacteria powder, algae residue, grateloupia filicina, cellullase, algal polysaccharides, yeast and lactic acid bacteria. The pleurotus nebrodensis culture medium is prepared from the algas, which are rich in nutrients and bio-active substances, as a main material, so that cultivation period of the culture medium is reduced effectively. During the preparation process of the culture medium, the yeast and the lactic acid bacteria are employed to carry out mix-fermentation, thereby enriching fermentation products. The porous substance is used for supporting the fermentation bacteria so that transmission of heat and nutrients are improved and activity time of the fermentation bacteria is increased. The culture medium is increased in decomposition degree of substrates, is improved in abundance and balance of the nutrients and provides fundament to short-period high-effective cultivation of the pleurotus nebrodensis.

The invention discloses a cracking furnace for a tire. The cracking furnace for the tire comprises a cracking furnace body, a connection tube, a spherical tank, and a separation tower; the connection tube is connected with the cracking furnace body and the spherical tank; a spiral separation plate is arranged in the spherical tank, and the bottom of the spherical tank is provided with a discharge port which is connected with the cracking furnace body; the separation tower is arranged on the top of the spherical tank; a condenser is arranged on the top in the separation tower; a distributor is arranged underneath the condenser; and the condenser is provided with a separation port which is connected with external transfer tanks. The cracking furnace for the tire has the advantages of high decomposition degree, high product quality, low fuel consumption, low environmental pollution and the like.

The invention provides a process and device for lime calcining by cement kiln tail. The device comprises a cement kiln tail preheating unit, a decomposition furnace, a cyclone separator and a coolingunit. The preheating unit is formed by connection of multistage preheating cyclones, the last-stage cyclone of the preheating unit is replaced by the cyclone separator, and a discharging port of the penultimate-stage cyclone of the preheating unit is connected with a feeding port of the decomposition furnace. An air inlet of the cyclone separator is connected with a strip airflow outlet of the decomposition furnace, a bottom discharging port of the cyclone separator is connected with a feeding port of the cooling unit, and an air outlet of the cooling unit is connected with a conical air inletof the decomposition furnace. The process and the device have advantages of low cement kiln transformation, small floor space, high raw material and fuel adaptability, stability in operation and highproduct quality.

The invention relates to a preparation method of high heat-resistant antibacterial toy paint, and belongs to the technical field of paint preparation. The preparation method comprises the following steps: using aloe leaves and rice leaves as raw materials to prepare a reaction mixture, then mixing the reaction mixture with ginkgo leaves and ginkgo tree roots and fermenting, adding aluminum chloride to obtain a reaction filtrate, and finally mixing the reaction filtrate with an organic solvent and other auxiliary agents and stirring to obtain the high heat-resistant antibacterial toy paint. Byextracting nutrients from the aloe leaves and generating organo-functional groups such as carboxyl groups, hydroxyl groups, phenolic hydroxyl groups on the surface, the adhesion between various molecules inside the paint is enhanced, and the adhesion between the paint and the toy material is improved. Meanwhile, the ginkgo tree grows a large amount of ginkgo biloba endophytic bacteria during the fermentation process, which helps to improve the antibacterial property. By introducing aluminium ions into the aloe nutrients and various fiber components, aluminium oxide grows on the surface of fiber and then toughness of the fiber is enhanced. Meanwhile, the toy paint has good heat resistance and has a wide application prospect.

The invention discloses a pleurotus eryngii cultivation material containing pleurotus eryngii residues and a preparation method thereof, and belongs to the field of edible fungus cultivation materials and preparation methods thereof. The cultivation material is prepared from the following raw materials in parts by mass: 55.0-65.0 parts of a fermented main material, 8.0-12.0 parts of soybean meal, 6.0-9.0 parts of corn meal, 18.0-22.0 parts of wheat bran, 1.0-3.0 parts of lime and 1.0-3.0 parts of light calcium carbonate. The fermented main material is mainly prepared by mixing and fermenting bagasse, mushroom residues, corncobs and saw dust in a mass ratio of 1 to 1.1 to 2 to 2. The preparation method comprises the following steps: A, cleaning pleurotus eryngii residues; B, screening the pleurotus eryngii residues; C, prewetting; D, mixing, composting and fermenting the bagasse, residues, corncobs and saw dust; E, turning; F, screening the mixed material; and E, adding the soybean meal, corn meal and other auxiliaries. According to the cultivation material, the raw material cost can be remarkably reduced, and the cultivated pleurotus eryngii has the advantages of high yield, high quality, small budding amount, low pollution and improved biological efficiency.

The invention discloses an industrial method for co-producing potassium sulfate and sulfur dioxide through CO2 mineralization by using potassium feldspar-waste gypsum. The method comprises the following steps of (1) preparing composite pellets with a core-shell structure from potassium feldspar, waste gypsum and a carbonaceous reductant, wherein a core is prepared from the waste gypsum and the carbonaceous reductant and the molar ratio of Ca / C is 1:(1-3); and an outer layer is prepared from the potassium feldspar and the waste gypsum, the mass ratio of CaSO4 / KAlSi3O8 is (1-3):1; (2) roasting the composite pellets in a rotary kiln, controlling the standing time within a temperature zone of 800-1100 DEG C to be 0.5-2h to obtain a roasted residue and an SO2-containing flue gas, cooling the flue gas for preparing sulfuric acid; (3) soaking the roasted residue obtained in the step (2) into water to obtain a leaching agent containing K2SO4 and leaching residues of CaSiO3 and Ca(OH)2; and (4) adding water to the obtained leaching residues for slurry mixing and then carrying out CO2 mineralization reaction. The carbonaceous reductant is prevented from being oxidized by virtue of the composite pellets, and meanwhile, CaSO4 of the outer layer is partially reduced by using CO released from core reaction, so that potassium extraction and CO2 mineralization are promoted.

The invention relates to an edible fungi cultivation nutrient for improving lignin conversion rate and a method for cultivating edible fungi using the nutrient. The edible fungi cultivation nutrient for improving the lignin conversion rate is mainly prepared from the following components in parts by mass: 18 to 40 parts of starch, 10 to 30 parts of vegetable protein, 20 to 45 parts of salt, 0.2 to1 part of betaine and 10 to 25.8 parts of sodium acetate. A nutrition regulation concept of ''combining inside and outside'' initiated in the edible fungi cultivation provided by the invention is very suitable for the growth and development of edible fungi, and can produce obvious economic benefits, and the edible fungi produced are environmentally friendly and pollution-free. The first domestically-developed idea of ''internal and external regulation'' and ''bacteria treatment with bacteria'' (good bacteria consume miscellaneous bacteria) of the edible fungi cultivation nutrient for improving the lignin conversion rate and the method for cultivating edible fungi using the nutrient achieves the ability to promote the disease resistance and production increase of the edible fungi, and theedible fungi produced meet the requirements of pollution-free products. The edible fungi cultivation nutrient for improving the lignin conversion rate and the method for cultivating edible fungi usingthe nutrient are suitable for factory production of edible fungi and production of export products.

The invention belongs to the technical field of the wine yeast, and particularly relates to sandalwood-type wine yeast and a preparation method thereof. The sandalwood-type wine yeast is prepared by smashing, mixed-fermenting and drying 60-70 parts of basic cereals and 30-40 parts of Chinese herbal medicine components, wherein the Chinese herbal medicine components mainly comprise the following raw materials by weight: 5-10 parts of cassia twig, 5-10 parts of pericarpium citri reticulatae, 4-8 parts of red dates, 3-7 parts of emberiza tristrami swinhoe, 3-6 parts of small honeylocust, 3-6 parts of clove, 3-6 parts of angelica sinensis, 2-6 parts of wild Chrysanthemum, 2-6 parts of chamomile, 2-5 parts of beautiful millettia root, 2-5 parts of fructus gardenia, 2-5 parts of cayenne pepper and 1-5 parts of liquorice. The preparation method for the sandalwood-type wine yeast is simple and easy to operate. The prepared sandalwood-type wine yeast has the characteristics of stable quality and safety, and is capable of effectively improving the sense acceptability of the wine.

The invention provides a camellia mycorrhizal seedling substrate and a use method thereof. The seedling substrate is prepared from vermiculite, peat, coal cinder, mycorrhiza fungi, coco coir and a water-retaining agent; the seedling substrate is divided into two layers, the vermiculite, the peat, the coal cinder and the mycorrhiza fungi are mixed to be uniform to serve as a lower layer substrate body, and the coco coir and the water-retaining agent are mixed to be uniform to serve as an upper layer substrate body. When the substrate is used, the lower layer substrate body is laid first, camellia seedlings are planted in the lower layer substrate body, then the upper layer substrate body is laid, watering is conducted thoroughly, and water is supplemented in time. The substrate is good in physical and chemical property and low in cost, the substrate preparation and use steps are few, the cultivated camellia seedlings are high in survival rate and less in disease and pest damage, plantsgrow strongly, and the requirements of commercial camellia seedlings are met.

The invention belongs to the technical field of rainwater utilization and provides a method for collecting rainwater for roof greening. The roof greening rainwater collection method comprises the following steps: (1) building a sash with a height of 8-12cm on the roof; (2) setting a plurality of rows of grid groups in parallel in the sash grid, and the grid groups include the first row of adjacently arranged grid and the second row of grids; the first row of grids is filled with mixture, and the raw materials of the mixture include expanded vermiculite, peat, compound fertilizer and plant seeds; the top of the second row of grids is sealed with the first open-hole membrane, and the A second perforated film is pasted around; multiple channels are opened between the first row of grids and the second row of grids; (3) collecting rainwater. The method is simple to operate, not only can effectively collect roof rainwater, avoiding damage to the roof caused by accumulated rainwater, but also can directly use the collected rainwater for roof greening, saving time and labor and beautifying the environment.

The invention discloses a urease-nanogold composite material with adjustable urease activity as well as a preparation method and application of the composite material. The composite material is formedby combining urease and nanogold, wherein the mass ratio of the urease to the nanogold is (0.5-1.5):(0.5-1.5). The urease modified nanogold synthesized by method can effectively control the catalyticactivity of the urease through a photothermal effect; a mixture of urea and phenol is used as a substrate, and under laser irradiation conditions, the degree of decomposition of the substrate by theurease-modified nanogold within the same reaction time is greatly improved; and the irradiation power of laser is changed, the degree of decomposition of the substrate by the urease-modified nanogoldchanges, and the catalytic activity of the urease can be adjusted by changing the laser power.

The invention provides a technology suitable for anaerobic treatment of swine wastewater and belongs to the field of environmental protection. Traditional swine wastewater treatment technologies mostly adopt an up-flow type anaerobic fluidized bed, have a good treatment effect and are mature, but can only be suitable for small-scale swine wastewater treatment; for large-scale swine wastewater treatment, hydraulic retention time is short and the treatment effect is heavily affected to the limitation of height. A cross-flow type anaerobic fluidized bed is adopted to replace the traditional up-flow type anaerobic fluidized bed for swine wastewater treatment, the length-width ratio of the cross-flow type anaerobic fluidized bed is 2-10 times, a partition wall is arranged in the middle, guide walls are arranged at the two ends, and a thruster is arranged. The swine wastewater moves in the horizontal direction, so that the hydraulic retention time can be designed as required and is generally5-45 days, the swine wastewater treatment effect is guaranteed, meanwhile, project investment and construction difficulty can be reduced, and operational management is convenient. The technology is suitable for the anaerobic treatment of the swine wastewater with various water volumes and concentrations, and is also suitable for the anaerobic treatment of other organic wastewater, especially, theanaerobic treatment of the organic wastewater with high and medium concentration.

The invention discloses a synergistic illumination and fermentation efficient panus giganteus culture medium and a preparation method of the synergistic illumination and fermentation efficient panus giganteus culture medium. The synergistic illumination and fermentation efficient panus giganteus culture medium is prepared from the following raw materials according to parts by weight: 2-5 parts ofstarch microsphere, 2-5 parts of chitosan porous microsphere, 20-30 parts of fish meal, 10-20 parts of peanut meal, 5-10 parts of beef extract, 12-25 parts of peptone, 15-30 parts of corn starch, 25-40 parts of wheat bran, 1-2 parts of bacillus subtilis, 2-3 parts of photosynthetic bacteria, 1-3 parts of yeast powder, 5-10 parts of glucose, and 300-450 parts of water. The disclosed synergistic illumination and fermentation efficient panus giganteus culture medium has the characteristics that the temperature is raised fast, the fermentation speed is high, the decomposing degree of a substrate is high and the nutrient substances of the culture medium are balanced, and the rich nutrient substances capable of being absorbed and used conveniently are provided for panus giganteus; the development and the growth of sporocarp of the panus giganteus are helped to be promoted in the growth process of the sporocarp in the cultivation of the panus giganteus, and the guarantee is provided for the efficient cultivation of the panus giganteus.

The invention belongs to the technical field of distiller's yeast, and specifically discloses a sandalwood-type distiller's yeast and a preparation method thereof. The sandalwood-type distiller's yeast of the present invention is mainly made of 60-70 parts of basic grains and 30-40 parts of Chinese herbal medicine components through pulverization, mixed fermentation and drying; wherein, the Chinese herbal medicine components mainly include the following raw material components in parts by weight: 5‑10 parts of cinnamon sticks, 5‑10 parts of orange peel, 4‑8 parts of red dates, 3‑7 parts of white eyebrows, 3‑6 parts of saponins, 3‑6 parts of cloves, 3‑6 parts of angelica, 2‑6 parts of wild chrysanthemum 2-6 parts of chamomile, 2-5 parts of Niu Dali, 2-5 parts of gardenia, 2-5 parts of pepper and 1-5 parts of licorice. The preparation method of the sandalwood-type distiller's koji is simple and easy to operate, and the quality of the prepared sandalwood-type distiller's koji is stable and safe, and can effectively improve the sensory acceptance of liquor.

The invention provides a disease-and-pest-resistance camellia seedling cultivating medium and an application method thereof. The seedling cultivating medium is prepared from vermiculite, peat, coal residues, tobacco sticks and a water-retaining agent, and is divided into two layers, the vermiculite, the peat and the coal residues are mixed to be uniform to serve as the lower-layer medium, and thetobacco sticks and the water-retaining agent are mixed to be uniform to serve as the upper-layer medium. When the disease-and-pest-resistance camellia seedling cultivating medium is used, the lower-layer medium is laid, camellia seedlings are planted into the lower-layer medium, then the upper-layer medium is laid, land is thoroughly watered, and moisture is supplemented in time. The disease-and-pest-resistance camellia seedling cultivating medium is good in physical and chemical property and low in cost, medium preparing and using steps are simple, organic materials are not required to be fermented and aged, the survival rate of cultivated camellia seedlings is high, few diseases and pests occur, plants grow robustly, and the requirement of commercialized camellia seedlings is met.

The invention belongs to the technical field of as-fired coal preheating and active coke regenerating devices, and particularly relates to a hot waste gas as-fired coal preheating and active coke regenerating device which comprises a crusher, a feeding hopper is arranged at the top of the crusher, a roller is rotationally arranged in the crusher, a first motor capable of enabling the roller to rotate is installed on one side face of the crusher, and a second motor capable of enabling the roller to rotate is installed on the other side face of the crusher. The device comprises a crusher, a vibrator is arranged below the crusher, a vibrating plate is movably arranged in the vibrator, and springs distributed in the axial direction of the vibrating plate are arranged at the bottom of the vibrating plate. The furnace coal can be further uniformly preheated, so that the working efficiency of the device and the decomposition degree of the furnace coal are improved, and a crusher device capable of crushing the furnace coal is additionally arranged in the device, so that the furnace coal with different sizes can be further uniformly heated, and the device is convenient to use.

The invention relates to the field of food enterprise wastewater treatment, in particular to a method for treating wine chateau wastewater. The method comprises the following steps: mixing wastewaterwith domestic sewage which is added with a disinfectant and is subjected to anaerobic fermentation treatment, carrying out anaerobic treatment, and carrying out aeration treatment. By combining anaerobic treatment and aeration and utilizing the action of anaerobic bacteria, organic matters are hydrolyzed, acidified and methanated, so that the organic matters in the wastewater are removed, the biodegradability of the wastewater is improved, the subsequent aerobic treatment is facilitated, the operation is stable, the treatment efficiency is high, the process flow is simple and convenient, the energy consumption is low, and meanwhile, the zero emission of the wastewater is realized.

The invention relates to an edible fungi cultivation nutrient for improving lignin conversion rate and a method for cultivating edible fungi using the nutrient. The edible fungi cultivation nutrient for improving the lignin conversion rate is mainly prepared from the following components in parts by mass: 18 to 40 parts of starch, 10 to 30 parts of vegetable protein, 20 to 45 parts of salt, 0.2 to1 part of betaine and 10 to 25.8 parts of sodium acetate. A nutrition regulation concept of ''combining inside and outside'' initiated in the edible fungi cultivation provided by the invention is very suitable for the growth and development of edible fungi, and can produce obvious economic benefits, and the edible fungi produced are environmentally friendly and pollution-free. The first domestically-developed idea of ''internal and external regulation'' and ''bacteria treatment with bacteria'' (good bacteria consume miscellaneous bacteria) of the edible fungi cultivation nutrient for improving the lignin conversion rate and the method for cultivating edible fungi using the nutrient achieves the ability to promote the disease resistance and production increase of the edible fungi, and theedible fungi produced meet the requirements of pollution-free products. The edible fungi cultivation nutrient for improving the lignin conversion rate and the method for cultivating edible fungi usingthe nutrient are suitable for factory production of edible fungi and production of export products.

The invention discloses lactobacillus plantarum which was collected in China General Microbiological Culture Collection Center on 25th, Sep., 2013. The collection number is CGMCC No.8242, and the collection address is No. 3, 1 Beichen West road, Chaoyang District, Beijing, Institute of Microbiology, Chinese Academy of Sciences. The lactobacillus plantarum provided by the invention has high activities of peptidase and aminotransferase. When the lactobacillus plantarum used as an auxiliary leavening agent is added into a cheddar cheese model, contents of water-soluble nitrogen, 5% PTA-SN and 12% TCA-SN in cheese are higher, protein decomposition degree can be improved effectively, flavoring characteristics of aged cheddar cheese can be formed in a short period of time, sensory scores of nut and sulphur taste of the aged cheese in the cheddar cheese model are increased, ripening period of cheddar cheese is shortened and the cost of storage can be saved.

The invention discloses a zircon sand rapid alkali-fusion decomposition device, which comprises: a stirring cabin, a spiral mixing roll, a driving mechanism, an oscillation generating mechanism and azircon sand screening mechanism. A stirring cavity is arranged in the stirring cabin, and an oil circuit used for heating the stirring cavity is arranged in the inner wall. The spiral mixing roll is arranged in the stirring cavity of the stirring cabin. The driving mechanism is used for driving the spiral mixing roll to rotate for stirring. The oscillation generating mechanism is used in reciprocating axial displacement for oscillating a material in the stirring cavity during rotation of the spiral mixing roll. The stirring cabin is provided with a feed inlet and a discharging port which are communicated with the stirring cavity, and an oil inlet and an oil outlet which are respectively communicated with two ends of the oil circuit. The oil circuit is spirally arranged outside the stirringcavity. The zircon sand screening mechanism is used for screening particle size of the material. Through the oscillation generating mechanism for axial displacement of the spiral mixing roll to oscillate the material in the stirring cavity during rotary stirring, the problem that the degree of fusion of zircon sand and alkali liquor is not high and zircon sand is incompletely decomposed can be effectively solved, purity of the zircon sand alkali-fusion decomposition is greatly enhanced, and product quality is improved.

The invention discloses a lactobacillus plantarum with high peptidase activity and the application of the lactobacillus plantarum, and belongs to the field of microorganism. The lactobacillus plantarum provided by the invention is preserved in the China General Microbiological Culture Collection Center on September 25, 2013, with the preservation number of CGMCC No.8243, and the preservation address of No.3 Building, NO.1 Beichen West Road, Chaoyang District, Beijing 100101, China, which is the location of the Institute of Microbiology of Chinese Academy of Sciences. The lactobacillus plantarum serving as an adjunct culture is added into the raw milk, higher viable count is maintained in the period of maturity, the degradation of cheddar cheese protein is speeded up, the content of free amino acids is increased, and finally, the maturing of the cheese and the formation of the flavor are speeded up.

The invention discloses a preparation method of an algistat containing gingko endophyte, and belongs to the technical field of water treatment. Ginkgo biloba endophyte extracted from ginkgo bark and leaves is attached to algistat components; the ginkgo biloba endophyte has good sterilization and bacteriostasis capability; the pollution of the algistat to the environment can also be reduced by utilizing the gingko endophyte; meanwhile, plant fibers, lignin and other components are extracted from the ginkgo barks and leaves; carbonized fibers are generated in the subsequent carbonization process; meanwhile, carbonized micro-particles formed by carbonizing sugar molecules are embedded into the carbon nano-particles; the algae removal efficiency of the algistat is enhanced; the effect is quick; a silicon dioxide component is also introduced into the fiber component; silicon dioxidete components are adsorbed in the plant fibers, silicon dioxide nano-molecules are generated in a carbon fiberstructure again after the pH value is adjusted and high-temperature treatment is conducted, the surface roughness of carbon fibers is improved, meanwhile, the carbon fibers are coated and protected to a certain extent, the growth environment of the gingko endophytes is protected, and the algae removal time efficiency of the algistat is improved.

The invention discloses a method of utilizing potassium feldspar-waste gypsum to mineralize CO 2 Industrial process for the co-production of potassium sulfate and sulfur dioxide. The method includes the following steps: (1) Potassium feldspar, waste gypsum and carbonaceous reducing agent are made into composite pellets with a core-shell structure, wherein the inner core is waste gypsum and carbonaceous reducing agent, and the Ca / C molar ratio is 1: 1~3; the outer layer is potassium feldspar and waste gypsum, CaSO 4 / KAlSi 3 o 8 The mass ratio is 1-3:1. (2) Put the composite pellets in a rotary kiln for roasting, and control the residence time in the temperature zone of 800-1100 ° C for 0.5-2 hours to obtain roasted slag and SO-containing 2 Flue gas, the flue gas is used to make sulfuric acid after cooling. (3) The roasted slag obtained in step (2) is immersed in water to obtain 2 SO 4 The leaching solution and CaSiO 3 , Ca(OH) 2 of leaching residue. (4) Add water to the leach slag obtained in step (3) and then conduct CO 2 mineralization reaction. The invention avoids the carbonaceous reducing agent from being oxidized by means of the composite pellets, and utilizes the CO released from the inner core reaction to form the outer layer of CaSO 4 Partial reduction is carried out, which promotes the extraction of potassium and CO 2 mineralization.