137 results about "Loss on ignition" patented technology

The invention relates to a decarbonization technology of coal fly ash with over-standard loss on ignition, original ash of the coal fly ash is sent to an ash storage tank of a treatment plant by a bulk tank car and sent to an ore pulp pre-processor after the measurement, an automatic dosing machine also adds a dispersant and a compound flotation agent into the ore pulp pre-processor for carrying out mixing and stirring, the output of the ore pulp pre-processor after the treatment enters a coal ash special flotation column, carbon particles are separated from the fly ash by the floatation, the carbon particles and the fly ash which are respectively collected are respectively concentrated by a concentrator, filtered by a filter and dehydrated, thus becoming fine coal powder and the coal flay ash with the low loss on ignition. The decarbonization technology can fully utilize the coal fly ash stacked by a power plant, thus generating substantial economic benefits; the coal fly ash during the operation can achieve the zero emission, which can protect environment, increase efficiency and save investment.

The invention relates to a formula of body mud of high-glass-phase stoneware and a preparation process of the body mud. The formula comprises the following chemical components by mass percent: 60.0-67.0% of SiO2, 10.0-14.0% of Al2O3, 8.0-12.0% of MgO, 0.5-2.0% of CaO, 1.0-2.5% of K2O, 0.5-2.0% of Na2O, 3.0-5.0% of BaO and 4-6.5% of loss on ignition. The body mud is prepared according to the formula and the high-glass-phase stoneware is prepared through the processes of body preparing, glazing, firing and the like. By constructing phase equilibrium between polycrystalline phases and material phases in the stoneware body material, the stoneware body material is endowed with the process properties of low firing temperature, short firing time, wide range, low shrinkage, high glass phase and light weight and the economic and technical indexes of energy conservation, consumption reduction and efficiency increase. The body mud has application prospects in the production fields such as top-grade household porcelains, art porcelains, heat insulation porcelains and the like.

A digital resin sand regeneration system comprises a vibrating knockout device, a magnetic separation device, a vibrating crushing device, an intermittent grinding regeneration unit, a conveying device, a sand storehouse, a dedusting device, a computer control system, etc. The main working principle is as follows: waste sand blocks are vibrated and crushed into smaller blocks and scattered sand by the knockout device; magnetic separation is performed to remove iron beans and flash; crushing is performed by the crushing device to obtain granular scattered sand; stripping, grading and temperature adjustment are performed by the intermittent grinding regeneration unit to remove micro powder included in the sand, and the sand temperature is adjusted to a temperature required by the process; and the sand is conveyed to the sand storehouse to keep in reserve. Through the additionally installed computer control system which comprises a material level sensor, a temperature sensor, a pressure sensor, and a corresponding electric control component, the whole production line can realize the target control of technological parameters and stock sand amounts; mainly-controlled technological parameters are: stripping rate (loss on ignition, LOI), micro powder content, sand temperature and sand amount; and technical guarantee is provided for the digital production management of the whole factory. Digital control of molding resin amount, hardening stripping time, and sand using amount is basic guarantee for solving energy saving and consumption reduction, improving productivity, and increasing yield.

The invention discloses a mineral powder modified by sintering dry desulphurization ash and a preparation method thereof. The 7-day activity index of the mineral powder modified by sintering dry desulphurization ash is more than 80%, the 28-day activity index is more than 100%, the specific surface area is more than or equal to 400 m2/kg, the sulfur trioxide content is less than or equal to 4.0%, the chloride ion content is less than or equal to 0.06%, the loss on ignition is less than or equal to 3.0% and the motility ratio is more than or equal to 100%. The mineral powder is made from the following raw materials in percentage by weight: 95 to 99% of blast-furnace slag powders and 1 to 5% of sintering dry desulphurization ash. The 7-day activity index and 28-day activity index of the modified mineral powder are greatly increased as compared with the common mineral powders, the requirement for specific surface area is reduced, and the energy consumption for milling slag powders can be reduced effectively. When applied to premixed concrete, the modified mineral powder is excellent in durability indices such as carbonization resistance, freeze resistance and chloride ion infiltration resistance, can effectively improve the working performance of concrete and improve the early-stage shrinkage crack resistance of hardened concrete.

The invention discloses a carbon reducing, sulfur reducing, iron removing and iron ore concentrate recovering method for coal ash with unburned carbons and higher SO3 and Fe (hematite) contents. With the unburned carbons in the coal ash as reducing agent, dry coal ash raw materials (9%+/-1% of loss on ignition and 9.5%+/-1% of SO3 content) mixed beforehand are reduced and roasted for 15-30 minutes at 900 DEG C, then are quickly separated from oxygen for water quenching and cooling; the iron ore concentrate is magnetically separated by a wet low-intensity magnetic separator. Gypsum (CaSO4) in the coal ash is converted to CaS after reducing and roasting, so that the SO3 content is reduced; the hematite with weak magnetism is converted to a magnetite with strong magnetism; weak magnetic separator is adopted to separate. The carbon, Fe and SO3 contents of the treated coal ash are respectively reduced below 5.3%, 5% and 1.32%; the coal ash can be directly used in the fields such as production of cement and concrete; at the same time, the iron ore concentrate with 48-53% of TFe level is obtained, and can be used as iron smelting raw materials or dense medium powder in industries such as coal dressing. The method has the advantages of prominent overall economic efficiency, no need of adding reducing agent, fewer auxiliary facilities, short process flow and easy realization of industrialization.

The invention discloses an inorganic high performance fiber composite material, prepared from the following raw materials in parts by weight: 450-900 parts of cement with the mean grain size of 30-60 mu. m and strength grade not less than 42.5, 180-360 parts of active mineral admixture with the mean grain size of 0.1-60 mu. m, loss on ignition being less than or equal to 3.0 percent, and a 28-day activity index not lower than 90 percent, 70-120 parts of inert admixture with the mean grain size of 0.1-60 mu. m, 850-1250 parts of sand with the continuous grading grain size of 0.16-4.75mm, 25-32 parts of water reducer with a water reducing rate greater than 30 percent, 130-150 parts of water, and 50-120 parts of copper plating end hook-shape steel fiber with the diameter less than 0.20mm and length of 12-14mm. The composite material is relatively low in overall price, uniform in fiber distribution, high in compressive strength and flexural strength, good in tenacity and suitable for being popularized and used in the constructional engineering industry.

This invention relates to nanoscale silicate anti-oxidation coating for steel billet annealing. The coating is composed of: composite binder 20-30 wt.%, composite phosphate curing agent 8-12 wt.%, and composite aluminosilicate filler 58-72 wt.%. The coating can resist 1500 deg.C high temperature. The coating does not need any surface treatment, and can be directly sprayed onto the surface of steel billet, and cured at normal temperature for 10 min. Before annealed and hot-rolled, the coated steel billet is water-quenched for several seconds so that the coating layer is removed without any trace, and the surface quality is improved. The coating can reduce the loss-on-ignition of various steels, thus can be used for surface protection of refractory materials used as furnace kiln lining. Besides, the coating can also be used as inner and outer wall coating, and metal surface (bridge, bridge pier and dam) coating with water, corrosion and oxidation resistance.

The invention discloses a mineral blending material for producing a PHC (Pyrolysis Hydrocarbon) tubular pipe free from a high pressure steaming process. The mineral blending material comprises the components in percentage by weight as follows: 60-80% of superfine blast furnace slag micropowder and 20-40% of desulfurization gypsum. According to the mineral blending material, the loss on ignition is less than or equal to 3%, the chlorine ion content is less than or equal to 0.02% and the water content is less than or equal to 1.0%. The mineral blending material provided by the invention is in particular suitable for preparing concrete for producing the PHC tubular pipe free from the high pressure steaming process and can replace 15-25% of cement equivalently. The prepared concrete has the advantages of high strength in early stage, continuous development of strength in later stage, good durability and the like. In the production process of the PHC tubular pipe, the high pressure steam maintenance link is omitted, so that the demand on the production device and the production energy consumption are reduced. According to the invention, industrial wastes such as flue gas desulfurization gypsum in a power plant are used as main materials, so that the materials are wide in source and low in cost. Meanwhile, the environmental pollution caused by industrial residue is reduced, and good economic and environment-friendly benefits are obtained.

A catalyst composition that has superior attrition performance and a method that produces said catalyst composition to be used for fluid catalytic cracking processes to convert a heavy hydrocarbon fraction into mainly liquid fuels, particularly gasoline and light olefins. The catalyst composition has a moisture level or loss on ignition below 12 wt % and attrition rate below 3 wt. %/hr.

The invention relates to strengthened dolomite pottery blank mud and particularly relates to a formula of the strengthened dolomite pottery blank mud, which can form a coupling and self-adapting blank glaze intermediate layer through blank glaze mass transfer interaction, and a preparation process thereof. The blank mud contains the following chemical ingredients in percentage by weight: 60-70% of SiO2, 11-15% of Al2O3, 6-10% of MgO, 2-8% of CaO, 0.5-3.0% of K2O, 0.5-3.0% of Na2O and 3.5-7.0% of loss on ignition, wherein the total ingredient content of MgO and CaO is higher than 12%, and the total ingredient content of Na2O and K2O is lower than 3%. According to strengthened dolomite pottery prepared from the blank glaze coupled and self-adapted strengthened dolomite pottery blank mud disclosed by the invention through firing, when the strengthened dolomite pottery is autoclaved for 30 minutes in an autoclave at the temperature of 170 DEG C while maintaining the pressure of 500KPa, the phenomena of glaze peeling and glaze cracking do not occur, so that the blank glaze binding performance reaches the standards of export products.

The invention discloses a particle size gradation coal blending method capable of improving the strength of briquetted activated carbon. The particle size gradation coal blending method comprises the following steps: (1) grinding: respectively grinding non-caking coal and highly caking coal, wherein the particle size of the non-caking coal after grinding is 300-400 meshes, and the particle size of the highly caking coal is 300-800 meshes; (2) weighing and proportioning: adding 5%-30% by weight fraction of the highly caking coal after grinding into the non-caking coal after grinding, and stirring till uniform mixing; (3) briquetting and forming: sending coal powder after mixing into a forming device for briquetting; (4) carbonizing: putting coal briquettes after briquetting and forming into a rotary furnace for carbonization; (5) activating: activating the coal briquettes after carbonization in an activating furnace till the loss on ignition achieves 45%-55% to obtain a briquetted activated carbon finished product. According to the particle size gradation coal blending method disclosed by the invention, by controlling the particle size gradation of the non-caking coal and the highly caking coal, the strength of the briquetted activated carbon finished product can be significantly improved. The particle size gradation coal blending method has the advantages of low cost and easiness in implementation.

The invention provides a method for purifying aedelforsite by a pure physical process. The method comprises the following steps of: firstly crushing aedelforsite raw material, and then adding water to get ore slurry A; removing iron impurities in the ore slurry A by adopting a magnetic separation process to get ore slurry B; then performing gravity classification on the ore slurry B through a shaking table, and getting a front-section material, a middle-section material and a back-section material after classification; performing wet type screening on the front-section material and the middle-section material by adopting a spin-vibrating screen, wherein a screen A of the spin-vibrating screen, which is used for the front-section material is of 300 meshes, a screen B of the spin-vibrating screen, which is used for the middle-section material is of 180 meshes, and residues on the screen A and the screen B are screened matters after the screening is completed; and finally performing dehydration and drying on the screened matters to get a high-purity aedelforsite product. In the product prepared by the method disclosed by the invention, the content of CaSiO3 is more than 96%, the content of Fe2O3 is less than 0.2% and the loss on ignition is less than 1.5%; and the production method disclosed by the invention has the advantages of simple operation process, high production efficiency and no environmental pollution.

The invention relates to nonluminous glaze. The nonluminous glaze is prepared by adding a proper amount of aluminum powder into slaked talc, quartz and feldspar to generate metal aluminum oxide without glossiness, so that the production cost of the nonluminous glaze can be effectively reduced; the added slaked talc is subjected to high-temperature calcination, so the impurity content is low, the loss on ignition is small and new grain which people do not like is avoided; a proper amount of silicon micropowder is added into the nonluminous glaze, the temperature resistance and the acid and alkali resistance of the glaze layer can be improved and the effect of improving the mechanical strength of the glaze layer is achieved; and the nonluminous glaze is obtained by performing wet ball milling by a wet ball mill, the raw materials for forming the nonluminous glaze are stirred and mixed uniformly, slurry with the physical and chemical properties tending to be uniform and consistent can beobtained, and glazing is fertilized.

The invention discloses a method for preparing secondary coal ash of goods by using high-calcium coal ash, which comprises the following steps of: (1) milling the high-calcium coal ash into 45 microns and sieving and remaining 4%-14%, milling the hearth ash into 45 microns and sieving and remaining 15%-33%, wherein the indexes of the high-calcium coal ash and the hearth ash are as follows: 28d activity index is more than 70%, the loss on ignition is not more than 8%, sulfur trioxide is not more than 3% and water content is not more than 1%; and (2) calculating the mixing ratio of the high-calcium coal ash to the hearth ash, causing the sieved residue of the 45-micron mixed ash to be not more than 20%, and according to the calculated mixing ratio, uniformly mixing the high-calcium coal ash with the hearth ash. According to the method provided by the invention, the demand on the fineness of the high-calcium coal ash is reduced, the problem of high cost caused by high power consumption during the process of milling the high-calcium coal ash is solved, the economic benefit is higher, the high-calcium coal ash and the solid wastes, namely, the hearth ash, are fully utilized, the environmental protection is facilitated and the social benefit is higher.

A product which contains acid magnesium pyrophosphate (magnesium dihydrogen diphosphate) and at least magnesium orthophosphate, producible by removal of water from an aqueous solution or suspension of a magnesium phosphate compound which has a molar ratio of Mg:P of 0.4-0.6:I, wherein the product has a loss on ignition of 7.5 to 13.5% and its method of preparation and its use in a leavening agent for bakery products.

The invention relates to hollowed-out Jun procelian, comprising two parts, i.e., base procelian and glazed porcelain, wherein a plurality of through holes are formed in the outer surface of the base procelian; the pre-separation between pore-making granules and a green body is realized by means of microwave treatment on the pore-making granules evenly doped in the base procelian green body through the through holes; then, the green body is subjected to high-temperature sintering, so that the pore-making granules are melted, and the hollowed-out Jun procelian is obtained. After the hollowed-out Jun procelian and a preparation technology thereof, provided by the invention, are adopted, the preparation of the hollowed-out Jun procelian which is good in finished product hardness, high in molding rate and low in loss on ignition can be realized by means of a base procelian raw material formula, a base procelian firing method and improvement for a glaze formula and a glaze firing technology.

The invention discloses a high-hardness abrasion-proof ceramic brick. The high-hardness abrasion-proof ceramic brick comprises a blank body, a ground coat layer, a decorative layer and a high-hardnessabrasion-proof glazed layer from bottom to top, wherein the high-hardness abrasion-proof glazed layer comprises the following chemical components in percentage by weight: 68-75% of SiO2, 10-13% of Al2O3, 0.05-0.1% of Fe2O3, 0.01-0.03% of TiO2, 1-3% of CaO, 2-4% of MgO, 2-5% of K2O, 1.5-3% of Na2O, 0.1-0.3% of Li2O, and 1-2.5% of BaO, wherein loss on ignition is 2.5-4%. According to the high-hardness abrasion-proof ceramic brick disclosed by the invention, through controlling chemical constituents in glaze, high-silicon glaze is obtained, so that formation of the high-hardness abrasion-proof glazed layer at the later stage is guaranteed. The invention further discloses a preparation method of the ceramic brick. Through the nanocrystallization technology of raw materials and thickness matching of particle diameters of the high-silicon glaze, the defects of a glaze surface, for example, the glaze layer is easy to subject to cut glaze when the glaze layer is formed at the later stage areovercome, and the hardness and the abrasion resistance of the glaze surface of the ceramic brick are greatly improved.

The invention discloses light and porous sludge ceramisite and a preparation method thereof. The sludge ceramisite is prepared from raw materials in parts by weight as follows; 10-25 parts of saw dust, 20-30 parts of fly ash, 5-10 parts of silica fume, 30-40 parts of sludge, 10-15 parts of quick lime, 20-30 parts of red mudstone, 1-5 parts of gypsum and 5-10 parts of magnesite. The sludge ceramisite is prepared with sludge produced in a municipal sewage plant as a main raw material, fly ash, red mudstone and gypsum as main addition raw materials and quick lime, saw dust, silica fume and magnesite as additives, and good porosity, high cylindrical compress strength, a high softening coefficient, a high water absorption rate and low loss on ignition of the sludge ceramisite can be further guaranteed on the basis that the light-weight property is guaranteed. The preparation method of the sludge ceramisite is simple, raw materials are widely sourced, waste can be turned into wealth, environmental protection is realized, reutilization of sludge resources in the sewage treatment plant is realized, and the sludge ceramisite has good social and economic benefits.

An in-line loss-on-ignition measurement system featuring an extractor configured to collect fuel or a combustion by-product from a hydrocarbon fuel burning plant, an on-site analyzer configured to receive the collected matter and determine loss-on-ignition data for the plant, a transfer mechanism configured to transfer the collected matter from the extractor to the analyzer, and a controller for displaying the loss-on-ignition data and/or for automatically adjusting one or more parameters associated with the plant.