Pyrite cinder production of chemical products
Xupei Yao, Ding Zhinong powders coal ash, pyrite slags, to design a new process new inorganic polymer flocculant prepared poly silicon iron aluminum salt (PAFCSi). Under strong alkali conditions, the Si-Al bond in the fly ash is opened, and Si is preferably eluted to form Na 2 SiO 3 . The strong alkali leached sodium silicate is polymerized under acidic conditions to obtain polymerized silicic acid; the Al and Fe mixture obtained by acid leaching fly ash residue and pyrite slag is polymerized with a certain concentration of NaOH to obtain polymerized iron and aluminum. The polysilicosilicate flocculant is obtained by copolymerizing polysilicic acid and polymeric iron aluminum in a certain molar ratio under specific conditions. In the preparation process, the effects of temperature, leaching solution concentration and leaching time on the leaching rate of silicon, iron and aluminum were investigated by orthogonal test. The optimum preparation conditions were as follows: temperature 100 °C, time 1 h, The concentration of the acid solution was taken as 4 mol/L. The prepared product PAFCSi can be used after being cured for 24 hours. The treatment effect of the two kinds of wastewater is obviously better than the commercially available products of mixed agglomerated aluminum (PAC) and polyferric iron (PFC), and the price is low, and has a good market prospect. Liu Wanyi and Wu Shangzhi introduced polyaluminum ferric chloride (PAFCS) prepared from pyrite slag and industrial waste gangue as raw materials. The composition is a composite inorganic polymer flocculant containing polynuclear polyferric iron and a combination of aluminum and chloride and sulfate, and thus has excellent properties of poly-iron and poly-aluminum. Because its raw materials are derived from industrial waste, its cost is lower, and it has broad application value in industrial water treatment. The polysilicate aluminum ferric coagulant (PSAP) was prepared by using kaolin and pyrite slag as raw materials. The process is simple and the process conditions are easy to control. Compared with the traditional coagulant, PSAF has a good effect, simple operation, non-toxicity, less dosage, good flocculation performance and wide application range. It is a promising polymer-inorganic hybrid. Coagulant. It has been reported in the literature that SW-type desulfurizer is prepared by using sulfuric acid slag as the main raw material, and its desulfurization performance is studied. Industrial desulfurization tests were carried out on biogas produced in sewage treatment of semi-water gas plants and wineries, and H2S in coke oven gas and water gas. After more than half a year of operation, it can prove that the H2S content can be reduced from 3000~5000mg/m 3 to 20mg/m 3 (according to national standards). When the sulfur capacity of the desulfurizer reaches 30%, it can be returned to the sulfuric acid production. For 3 months, its main performance has reached the level of similar products at home and abroad. Liu Changchun and Xu Xiaoying used the pyrite slag and hydrochloric acid to prepare water treatment agent polyaluminum ferric chloride (PAFC), which proposed a reasonable production process and production conditions. The experimental results on papermaking black liquor and tannery wastewater show that PAFC has faster sedimentation speed, tight floc, good stability, low corrosivity and low cost compared with coagulated aluminum (PAC). Qiu Huiqin from Shanghai University used pyrite slag and sulfuric acid as the main raw materials, added appropriate amount of aluminum hydroxide, and designed a new process to prepare inorganic composite polymer coagulation-polymerized ferric acid aluminum-aluminum (PFAS). The condensing properties were studied. The test results show that the coagulant has excellent properties of removing turbidity, decolorizing and removing COD Cr . It has a wider pH range than polymeric ferric sulfate (PFS) and polyaluminum chloride (PAC). When treating printing and dyeing wastewater, the COD Cr removal rate of PFAS is 10% to 20% higher than that of PFS and PAC. Document describes pyrite cinder prepared starting a new process to obtain a colloidal dispersion method ferric sulfate (PFS) using, followed by addition of sodium phosphate in solution to give PFS poly ferric sulfate (PFPS). The factors affecting the base degree of PFPS and the turbidity removal effect of PFS and PFPS were studied. The results show that the process of preparing PFS by colloidal dispersion method is unique, and no pollutant nitrogen oxides are produced. The experiment also showed that the flocculation effect of PFPS was significantly better than that of PFS. The best turbidity removal effect can be achieved when the PFPS dosage and the salt base are suitable. Li Mingyu and Ma Tongsen conducted an experimental study on the preparation of inorganic composite coagulant polymeric iron salt (FHPF) from pyrite cinder. The factors affecting the acid dissolution and iron polymerization of the slag were investigated. The results show that the concentration of sulfuric acid, reaction time and system temperature are the main factors affecting the dissolution rate of iron in pyrite cinder. Adding a suitable co-solvent during the sour acid dissolution process not only accelerates the acid leaching rate. It also improves the coagulation performance of the product. Yan Qishe and Li Mingyu studied the production of solid composite coagulant (PISC) with pyrite slag, sulfuric acid and other additives. The method has the advantages of simple process, simple operation, short production cycle, low equipment investment, low production cost and stable performance. When it is used to treat papermaking wastewater and domestic wastewater, the removal rate of COD Cr in wastewater can reach 75% and 80%, respectively. It shows high efficiency, high quality, low price, safe and non-toxic. The pyrite cinder is reduced to iron powder by carbon monoxide at a high temperature, and then mixed with pyrite powder (iron powder: pyrite powder = 1:2) and heated to obtain FeS. It is treated with waste water containing arsenic, the arsenic removal efficiency of 98%. 4 Feet Veneer Peeling Line is one of the normal size Veneer Peeling production line . the veneer produced is 4 feet size . the whole line include log cutting machine, log conveyor ,log debarker , garbage transfer device, wood core conveyor belt and veneer connecting machine. 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