The invention belongs to the technical field of arsenic-containing solid waste treatment and discloses an antimony smelting arsenic-alkali residue and smelting off-gas comprehensive treatment method with processes of wastes against one another. The method mainly comprises the six working procedures including the soaking, sieving and pulverizing procedure, the leaching procedure, the neutralizing procedure, the arsenic removing procedure, the alkali making procedure and the innocent treatment procedure, and treatment with processes of wastes against one another and innocent treatment of arsenic-alkali residue are achieved. The longstanding problem of environment pollution of the arsenic-alkali residue, that plagues the national antimony smelting industry, is thoroughly solved, and environmental risks caused by stockpiling of the arsenic-alkali residue are eliminated; and meanwhile, valuable elements are separated, enriched and effectively recovered.

Antimony smelting arsenic-alkali residue and smelting off-gas comprehensive treatment method

The invention relates to a method for recycling and treating arsenic slag resources by freezing and separating arsenic and alkali in alkaline slag water extract. The method comprises the following steps of adding water into alkaline slag, pulping, leaching with water, introducing CO gas to convert NaOH in the slurry into Na CO , evaporating and concentrating the separated Na CO -containing arsenic alkaline water extract, cooling, freezing and crystallizing, dissolving the separated wet crystals, cooling, freezing and recrystallizing again to obtain sodium carbonate, concentrating the separated arsenic-containing mother liquor, carrying out secondary freezing crystallization treatment, precipitating arsenic by using a Na S saturated aqueous solution, maintaining the pH value at1-2 by using H SO , adding pulverized coal into filter residues separated from an arsenic precipitation mixed solution, and carrying out oxidation incineration to obtain As O , and convertingthe filtrate with lime. According to the method, arsenic and alkali in the alkaline slag water extract are separated through freezing crystallization, Na CO .10H O is obtained through freezingrecrystallization, and Na S is used for precipitating arsenic, so that arsenic slag resources can be well recycled.

Method for recycling and treating arsenic slag resources by freezing and separating arsenic and alkali in alkaline slag water extract

Disclosed is a method for removing sulfur from sulfur-containing flue gas by using an arsenic industrial alkali residue to produce sodium sulfite. The method includes the following steps: adding waterinto the arsenic industrial alkali residue, carrying out circulated beating and then filtration by pressure, adding excessive lime into a filtrate for arsenic precipitation and adding a sodium sulfide solution for purifying, filtering the filtrate by pressure, introducing a lye into a desulfurization absorption tower to carry out an absorption and desulfurization reaction on the sulfur-containingflue gas, and carrying out filtration by pressure to obtain supernatant liquid containing sodium sulfite and sodium sulfate; adding appropriate amount of SO2 and excessive lime into the supernatant liquid, reducing the sodium sulfate in the supernatant liquid into sodium bisulfite, adding a sodium hydroxide solution into a filtrate after filtration by pressure to adjust the pH value to convert the sodium bisulfite to sodium sulfite; and finally, carrying out evaporation and supersaturated crystallization, centrifugal dehydration and crystal drying to obtain the sodium sulfite product having amass concentration of more than 90%. The method can realize the harmless and resource disposal of the arsenic industrial alkali residue in large-scale industrialization. The sodium sulfite product has the advantages of high production quality and stable content. The treatment of waste by waste is realized, and the full value recovery of sulfur in the arsenic industrial alkali residue and the sulfur-containing flue gas is realized.

Method for removing sulfur from sulfur-containing flue gas by using arsenic industrial alkali residue to produce sodium sulfite

Provided is a method for producing sodium sulfite by removing sulfur from sulfur-containing flue gas using industrial alkali residue containing arsenic, comprising, circulating and slurrying the industrial alkali residue containing arsenic with water, then performing pressure filtration, purifying the filtrate by adding excessive amount of lime to precipitate arsenic and adding a sodium sulfide solution, then performing pressure filtration, adding the alkali solution in the desulfurization absorption tower to absorb and desulfurize the flue gas containing sulfur, performing pressure filtration to obtain a clear solution containing sodium sulfite and sodium sulfate; adding appropriate amount of SO 2 and excessive amount of lime to this clear solution to reduce the sodium sulfate in the clear solution to sodium bisulfite, after performing pressure filtration, adding sodium hydroxide solution in the resulting filtrate to adjust the pH value so as to convert sodium bisulfite to sodium sulfite; finally, performing supersaturated crystallization by evaporation, dehydrating by centrifugation, drying the crystal to obtain a sodium sulfite product with mass concentration≥90%

Method for producing sodium sulfite by removing sulfur from sulfur-containing flue gas using industrial alkali residue containing arsenic

The invention provides an alkaline-leaching arsenic-removing method for arsenic-containing materials, belongs to the technical field of wet-process metallurgy, and aims to solve the problems that an existing arsenic-containing material treatment way has problems of being poor in operation environment, high in energy consumption, low in arsenic recovery rate, liable to generate secondary pollutionon environment by obtained products, relatively high in production cost, complex in process, not beneficial for economical production, and the like. The alkaline-leaching arsenic-removing method comprises the following steps: S1, weighing the arsenic-containing materials; S2, adding reaction liquor into the arsenic-containing materials in a liquid-solution mass ratio being 3:1 to 12:1, adopting water bath in a reaction process, wherein a water bath temperature is 25-95 DEG C, and reaction liquor at least comprises a sodium carbonate solution with concentration being 100-300g/L; and S3, filtering the reacted solution after reacting for 2-5 hours, thereby obtaining leach residues and leach liquor. The reaction liquor in step S2 further comprises a sodium sulfide solution with concentration being 0-100g/L.

Alkaline-leaching arsenic-removing method for arsenic-containing materials

The invention provides a technique for producing sodium sulfite products by absorption of SO2 flue gas through arsenic-containing industrial alkali residue water alkali liquor and arsenic removal purification. The technique comprises the following steps: pulverizing arsenic-containing industrial alkali residues, adding water, pulping and then carrying pressure filtration; adding a sodium sulphideaqueous solution in obtained leachate, carrying out filter pressing after treatment through p-phenylenediamine to obtain arsenic-containing leached clear alkali liquor; pumping the clear liquor into aspraying and desulfurizing tower to absorb SO2 flue gas so that the pH value of absorbing liquor to be reduced to 6.2-6.4; adding the arsenic-containing leached clear alkali liquor and adjusting thepH value to be 10.5-11.5, then adding a polymeric ferric sulfate aqueous solution and carrying out arsenic precipitating; carrying out filter pressing to separate liquid from solid; carrying out concentration and evaporation of the clear liquor and then crystallizing; and separating motor liquid and then drying to obtain the sodium sulfite products of which the mass concentration is greater than or equal to 96%. On the premise of ensuring industrial stable production and increasing the content of the sodium sulfite products, the technical process and parameter selection are optimized, obvioustechnological progress is obtained, if 20,000 tons of alkali residues are produced every year in the whole country, about 35,000,000 yuan of economic benefit can be increased, the total amount of arsenic As treated harmlessly by arsenic removal can be 6%* 20,000= 1,200 tons per year, 4,250 tons of sulfur is removed every year, and huge environmental protection benefit can be produced.

Technique for producing sodium sulfite products by absorption of SO2 flue gas through arsenic-containing industrial alkali residue water alkali liquor and arsenic removal purification

The invention provides a method for preventing the furnace shutdown accident caused by tuyere blockage due to backward flow of slag during sudden power failure of a fuming furnace. According to the method, an air compressor and a large-volume air storage tank are arranged to be connected with the fuming furnace, a standby diesel generator and an automatic control cabinet controlling overall operation are arranged, and the standby diesel generator is connected with an air blower of the fuming furnace and the air compressor; when an external power source is in power failure suddenly, the large-volume air storage tank is instantly and automatically controlled to blow air to the fuming furnace for delaying, meanwhile a circuit is switched to a standby power generation mode, the standby dieselgenerator is started and supplies power to the air blower of the fuming furnace, then normal air use of the fuming furnace is guaranteed, meanwhile, the large-volume air storage tank stops work, and the air compressor starts and supplements air to the large-volume air storage tank. According to the method, the air compressor and the large-volume air storage tank are used for air supplementation and delay during power failure, the standby diesel generator is started to supply power, it is avoided that during power failure of the fuming furnace, since slag flows backwards to block a tuyere, thefurnace shutdown accident is caused, and the situation that due to sudden power failure, the slag flows backwards into the tuyere of the fuming furnace, and furnace shutdown is caused can be effectively avoided.

Method for preventing furnace shutdown accident caused by tuyere blockage due to backward flow of slag during sudden power failure of fuming furnace

Disclosed is a processing method for producing a sodium sulfite product by SO2 flue gas absorption and arsenic-removal purification using a leaching solution of an arsenic-containing industrial alkaline residue. The method comprises: crushing an arsenic-containing industrial alkaline residue, adding water, pulping, and filter pressing to obtain a leaching solution; adding sodium sulfide aqueous solution and p-phenylenediamine into the leaching solution, followed by filter pressing to obtain a clear arsenic-containing alkaline leaching solution for standby; pumping the clear solution into a spray desulfurization tower to absorb SO2, so as to reduce pH value of a resulting absorption solution to about 6.2-6.4, followed by adding the clear arsenic-containing alkaline leaching solution to adjust the pH value to about 10.5~11.5; adding a poly-ferric sulfate aqueous solution for arsenic precipitation and filter pressing so as to perform liquid-solid separation, followed by concentration and evaporation of the clear solution, and then crystallization to separate the mother solution, and finally drying, thereby obtaining a sodium sulfite product having a mass concentration greater than or equal to 96%.

Processing method for producing sodium sulfite product by so2 flue gas absorption and arsenic-removal purification using leaching solution of arsenic-containing industrial alkaline residue

Mo Yunhua

Papers

Technique for producing sodium sulfite products by absorption of SO2 flue gas through arsenic-containing industrial alkali residue water alkali liquor and arsenic removal purification

Method for recycling and treating arsenic slag resources by freezing and separating arsenic and alkali in alkaline slag water extract

Method for preventing furnace shutdown accident caused by tuyere blockage due to backward flow of slag during sudden power failure of fuming furnace

Processing method for producing sodium sulfite product by so2 flue gas absorption and arsenic-removal purification using leaching solution of arsenic-containing industrial alkaline residue