38 results about "Ash preparation" patented technology

The invention relates to a method for preparing ZnO from blast furnace gas ash through microwave roasting pretreatment and ammonia leaching, and belongs to the technical field of hydrometallurgy. The method comprises the steps that 1, microwave roasting pretreatment is conducted, specifically, Na2CO3 with the blast furnace gas ash mass being 5-20% is added into the blast furnace gas ash to be uniformly mixed, a mixed material is obtained, microwave roasting is conducted on the mixed material for 0.5-2 h at the temperature of 200 DEG C-600 DEG C, and a roasted product is obtained; 2, mixing and leaching are conducted on the roasted product through ammonia water with the total ammonia concentration being 3-6 mol / L and a NH4HCO3 solution for 0.5-1.0 h at the temperature of 25 DEG C-45 DEG C, then solid-liquid separating is conducted, washing treatment is conducted on solid slag through a 5% ammonia water solution for many times, and leaching liquid and leaching residues are obtained; and 3, the ZnO is prepared after purifying and impurity removing, ammonia distillation and crystallization and microwave calcining are conducted. According to the method for preparing the ZnO from the blast furnace gas ash through microwave roasting pretreatment and ammonia leaching, ferrous metallurgy smoke dust containing zinc can be cleanly and efficiently utilized, the recovery utilization rate of secondary resources is increased, and meanwhile a high-quality ZnO product is prepared with low energy consumption.

The invention discloses a method for efficient and harmless treatment of copper cyanide wastewater in mines, comprising the following steps: step 1, preparation of modified straw ash: adding straw ash to deionized water and ultrasonically dispersing for 30-40 minutes, and the ultrasonic power is 300-40 minutes 400W, then add ferric chloride and aluminum chloride in turn and continue to stir for 20-30min. The modified straw ash used in the present invention is treated with raw materials such as ferric chloride and aluminum chloride, then compounded with modified bentonite, and finally through the establishment of a blending system. The use of straw ash has the potential of resource reuse. The effect is in line with the concept of environmental protection. The modification of bentonite is poured with a modified liquid. The modified liquid can form a pore structure in the bentonite, so that the straw ash enters the bentonite, and finally seals the pores with the microsphere emulsion to prepare the material. Has a strong specific adsorption capacity.

The invention discloses a method for preparing a non-sintering cementitious material by using waste incineration fly ash: (1) mixing silicon slag and blast furnace slag, grinding and sieving to obtain a mixed silicon material, mixing graphite powder and waste incineration fly ash, Obtaining graphite fly ash; (2) mixing sodium hexametaphosphate, mixed silicon material and graphite fly ash to obtain a gelled precursor material; (3) dissolving the gelled precursor material in water, and performing low-temperature plasma irradiation while stirring, Drying, grinding and sieving to obtain secondary cementitious material; (4) mixing aluminum hydroxide waste with alkali slag, grinding and sieving to obtain aluminum activator; (5) mixing aluminum activator and secondary cementitious material Evenly, get gelling material. The preparation process does not require high-temperature sintering, which greatly saves process energy consumption; the cementitious material can achieve a maximum solidification rate of 99.24% of heavy metals, a removal rate of 98.75% of chlorine, and a removal rate of 98.37% of dioxins; The axial compressive strength is as high as 50.68MPa.

The preparation of a kind of descaling and antiscaling agent used in the deashing water system provided by the present invention is prepared raw materials in parts by weight, consisting of 28-35 parts of itaconic acid-styrenesulfonic acid-acrylic acid copolymer, 27 parts of polyol phosphate -36 parts, 16-23 parts of glycolic acid, 19-25 parts of pure water; its best preparation: 30 parts of itaconic acid-styrenesulfonic acid-acrylic acid copolymer, 30 parts of polyol phosphate, 20 parts of glycolic acid, It is composed of 20 parts of pure water; when preparing, add pure water first, then put its components into the reaction kettle in turn, stir for 40-50 minutes, and control the temperature at 20-35°C to obtain the product; among them, itaconic acid-styrenesulfonic acid- For the synthesis of acrylic acid copolymer, take 10-14 parts of itaconic acid, 5-7 parts of styrenesulfonic acid, 3-5 parts of isopropanol, and 30-38 parts of pure water, put them into the reaction kettle in turn, stir, and heat to 95°C , dropwise add 22-25 parts of acrylic acid and 2 parts of ammonium persulfate solution (dilute with 18 parts of water first), control the dropwise addition within 30 minutes, keep warm for 110-122 minutes, drop to room temperature and discharge, pH value 1.5-2.5 , It can be obtained when it is light yellow transparent liquid. This product is used for descaling and antiscaling of ash removal water in power plants and reinjection water in oil fields, and the dosage is 5-10mg / L.

The invention provides a liquid-phase hydration method separation ash treatment process comprising the following steps: (1) a sodium carbonate monohydrate wet material is prepared with a liquid-phase hydration method; (2) the sodium carbonate monohydrate wet material is added into a heavy ash fluidized bed, and drying is carried out, such that heavy ash is obtained; tail gas produced in the heavy ash fluidized bed is separated in a cyclone separator, such that separation ash and dust-containing air are obtained; (3) the separation ash is added into a separation ash fluidized bed, and drying is carried out, such that heavy ash and separation ash tail gas are obtained; and the separation ash tail gas is subjected to cyclone separation again in the cyclone separator. The process provided by the invention has the following advantages: separation ash is subjected to the drying treatment on the basis of an original liquid-phase hydration method heavy ash preparation process, such that separation ash alkali content is improved, and heavy ash product quality is improved; a situation of low separation ash total alkali content and the restriction on variety alkali production of prior arts are solved.