33results about How to "Slow dehydration" patented technology

The invention discloses a firing technique for enhancing kiln transformation ratio of Nixing pottery, which comprises the following steps: 1) putting a dried billet into a kiln, gradually heating to 50-100 DEG C, and keeping the temperature for 24-36 hours; 2) heating to 500-600 DEG C by 55-70 DEG C an hour; 3) heating to 750-850 DEG C by 90-110 DEG C an hour, closing the air holes of the kiln, and adding the kiln transformation material into the kiln; 4) heating to 1080-1150 DEG C by 90-110 DEG C an hour, wherein the heating speeds of the heating tubes are sequentially lowered from bottom to top in the kiln; and 5) cooling, and taking out the fired billet. In the high-temperature firing stage, the temperature difference appears in the kiln, so that the atmosphere of the reduction reaction is more violent; and the temperature is raised once an hour, so that the temperature in the kiln is changed, thereby enhancing the kiln transformation ratio.

The invention discloses a method for drying honeysuckles. The method includes placing screened fresh honeysuckles into color-protecting solution; laying the honeysuckles on stainless steel screen cloth after the color-protecting solution on the honeysuckles is drained, and placing the stainless steel screen cloth in a drying chamber of a heat pump drying machine; setting the temperature of the drying chamber at 40-60 DEG C, setting an air speed of the drying chamber at 1-2.5m / s and setting the concentration of oxygen in the drying chamber at 5-21%; filling the drying chamber with nitrogen for 3-5 minutes at intervals of 20-30 minutes in drying procedures, keeping the required concentration of the oxygen in the drying chamber unchanged, and drying the honeysuckles for 6-10 hours to obtain the honeysuckles which are dried by the aid of heat pumps; placing the screen cloth with the honeysuckles into a microwave generator after the honeysuckles are dried by the aid of the heat pumps, and drying the honeysuckles by the aid of microwaves until the moisture contents of the honeysuckles are lower than or equal to 12%; spreading the honeysuckles in cool, clean and ventilation positions to temper the honeysuckles; loading the honeysuckles in compound zip-lock bags, and filling the insides of the bags with nitrogen so that the concentration of oxygen in each bag is lower than or equal to 5%. The drying chamber of the heat pump drying machine is preheated for at least 30 minutes before the stainless steel screen cloth is placed in the drying chamber. The method has the advantages that a manufacturing process is simple, the cost is low, and the quality of products are stable; a brightness value L of the honeysuckles manufactured by the method is larger than 60, the total phenol content of the honeysuckles is higher than 0.5%, a chlorogenic acid loss rate is lower than 20%, and the method has obvious merits, an important application prospect and high popularization utilization value.

The invention discloses a mining fire extinguishing material additive and application of the mining fire extinguishing material additive. The mining fire extinguishing material additive is prepared from, by weight, 40-80 parts of silicate materials, 0.1-5 parts of tackifier, 1-10 parts of dispersing agent, 5-20 parts of surfactant, 1-10 parts of suspending agent, 1-10 parts of super absorbent polymer and 1-10 parts of diluter. The mining fire extinguishing material additive has the advantages of being prepared from the easy-to-obtain raw materials, and being low in cost, easy to implement, good in gelatination effect, high in water retaining capacity, low in water loss speed, applicable to being added into coal ash, yellow mud, white mud and other underground coal mine filling grouting materials and excellent in fire preventing and extinguishing performance.

The invention relates to a preparation method of one-dimensional alumina fibers through a hydrothermal-flux technology and pertains to the technical field of inorganic chemical material preparation. The invention adopts water soluble inorganic aluminum salt as raw material and inorganic base or inorganic acid as precipitator; amorphous aluminium hydroxide deposit is first prepared by a normal temperature synthesis method and then added into water solution of inorganic morphology control agent for hydrothermal reaction to obtain an intermediate product of one-dimensional boehmite (gamma-AlOOH)which is then mixed with the flux so as to obtain the one-dimensional alumina fibers with the diameter of 10-100 nm, the length of 0.5-10 Mum, the length-diameter ratio of 50-200, regular morphology and good crystallization. The invention has simple technology, low cost and high additional value, and is easy to be popularized industrially. The one-dimensional alumina fibers prepared by the invention have excellent performance, high additional value and are capable of being applied to the industries of aluminium alloy, ceramic, plastic, rubber, etc., as reinforcing materials.

The invention relates to an adhering type water-based fire extinguishing agent for a vertical surface solid fire. A formula of the fire extinguishing agent comprises 3-10% of one or more than two of potassium acetate, potassium bromide, potassium oxalate or potassium bicarbonate, 0.1-0.5% of a non-ionic surface active agent, 1-5% of sodium carboxymethylcellulose, 1-5% of sodium silicate, 0.5-2% ofsodium polyacrylate, 0.1-0.3% of a calcium-magnesium ion complexing agent and the balance water. The fire extinguishing agent will greatly improves the fire extinguishing efficiency of the vertical surface solid fire.

The invention discloses a method for grouping tobacco leaf raw materials in a cigarette leaf group formula, which is based on the leaf surface density of tobacco leaves of each grade. The present invention adopts the leaf surface density index in the quality characteristics of tobacco leaves as the key index of the leaf group formula grouping, overcomes the fact that the existing methods mainly rely on manual decision-making experience, lack of more reliable sensory and chemical evaluation guidance basis, and design targeted The key process parameters of the silk-making process further exert the quality level of the processing technology, stabilize and improve the quality of cigarette products; and the leaf surface density of tobacco leaves is an indicator that is easy to obtain results among the many quality characteristics of tobacco leaves, and has strong operability .

Provided is an industrial two-layer fabric satisfying basic characteristics of a fabric, such as rigidity, wear resistance, dewaterability, mark suppression, and low water retention for reducing the amount of water retained. The industrial two-layer fabric pertaining to the present invention has at least a first structure and a second structure in the weave repeat thereof, the first structure being formed by a combination of two upper-surface-side warps and a single lower-surface-side warp, the second structure being formed by a single upper-surface-side warp and a single lower-surface-side warp, the first structure and the second structure being disposed adjacent to each other, the upper-surface-side warps in the first structure being formed by a warp binding yarn having the function of binding an upper-surface-side fabric and a lower-surface-side fabric, the combination of two upper-surface-side warps forming the first structure being disposed adjacent to each other and constitutinga partial rib weave at the surface of the upper-surface-side fabric, the diameter of the lower-surface-side warp being larger than the diameter of the upper-surface-side warp forming the first structure, and the upper-surface-side warp in the second structure being formed by a flat warp.

The invention relates to extinguishing material for coal mine and a production method thereof and belongs to the field of coal mine materials for fire preventing and extinguishing. The extinguishing material is made by mixing well 5-15wt% of attapulgite, 1-5wt% of salt-resistant super-absorbent polymer and water. Preparation of the salt-resistant super-absorbent polymer includes: adding 3 parts of acrylic acid into an ice bath, neutralizing with sodium hydroxide, adding 4 parts of acrylamide to from a monomer, and sequentially adding potassium peroxodisulfate accounting for 0.25% of the total weight of the monomer and N, N-methylene bisacrylamide accounting for 0.25% of the total weight of the monomer; heating a water bath to 70 DEG C, allowing for reaction for 7h, and filtering and drying the cooled reaction product. Aggregate using the attapulgite as colloid is fine in suspendability and large in specific area, the obtained colloid is remarkably uniform and long in shelf life.