7results about How to "Reduce slagging" patented technology

The present application provides a kind of low load under coal mill outlet wind powder temperature regulating system and method, including temperature sensor group, flow sensor, coal dust concentration sensor, temperature regulating device and control unit, wherein: temperature sensor group is used to measure the wind powder temperature of different positions of coal mill outlet pipeline;Flow sensor is used to measure the wind powder flow of different positions of coal mill outlet pipeline;Coal dust concentration sensor is used to detect the coal dust concentration in the coal mill outlet pipeline;Temperature regulating device is used to adjust the wind powder temperature of coal mill outlet pipeline;Control unit is used to receive the signal of temperature sensor group, flow sensor, coal dust concentration sensor, calculate temperature regulating amount and output signal to temperature regulating device to the wind powder temperature of coal mill outlet.The present application ensures that the wind powder temperature of coal mill outlet is stable near the target value, improves the combustion efficiency, and ensures the stable operation of the entire thermal system.

This utility model discloses a side-blown furnace feeding structure, including a feeding hopper, a weighing alarm component, a feeding port vertical pipe, and a furnace top cover horn-shaped feeding port. The feeding hopper vertical pipe is coaxially inserted into the feeding port vertical pipe to form an annular gap channel. The weighing alarm component includes a weighing sensor fixed to the outer wall of the feeding hopper, an alarm device electrically connected to the sensor, and an interlocking stop feeding execution mechanism. When the feeding hopper accumulates material due to blockage, the weighing sensor monitors the weight change in real time and triggers the alarm device, simultaneously stopping the feeding. The horn-shaped opening of the furnace top cover feeding port faces the furnace chamber, reducing the contact between the material and the inner wall, reducing adhesion and slag formation. The annular gap channel forms an air guiding cavity, maintaining stable negative pressure inside the furnace, preventing flue gas from escaping, and improving smelting safety and efficiency.

The application provides a continuous casting production method of tinplate, which comprises the steps of dynamic control of a pulling speed, linkage control of cooling, dynamic adjustment of an insertion depth of a submerged nozzle and dynamic argon blowing, wherein the pulling speed control is based on the maximum section steel flow, the target pulling speed is calculated reversely according to the actual section, and the steel flow of each section is constant; the cooling water flow is compensated in linkage with the increment of the pulling speed, and the bulging of the shell is inhibited; the insertion depth of the nozzle adopts a one-way increasing insertion mode from shallow to deep in multiple stages; and the argon blowing flow is adjusted in stages according to the fluctuation of the crystallizer liquid level. The application can reduce the nozzle clogging area by more than 50%, the standard rate of liquid level fluctuation is increased to 95%, the continuous casting castability and the surface quality of the casting blank are significantly improved, and the application is suitable for the efficient and stable continuous casting production of tinplate and other aluminum-containing steels.

The application relates to the technical field of valves, in particular to a top-mounted wear-resistant shear valve which comprises a valve body, a valve cover fixed at the top of the valve body and a shear gate located in a vertical installation cavity in the valve body; the bottom end of the shear gate is provided with a bevel shear blade which is built up with a hard alloy layer, a detachable valve seat with a scraper surface is arranged on the downstream side of a flow passage of the valve body, a longitudinal guide rail matched with the shear gate is arranged on the inner wall of the vertical installation cavity, and a slag discharge groove is arranged at the bottom of the valve body. The top-mounted structure can realize integral hoisting and maintenance of internal components without disassembling pipelines, thereby shortening the maintenance time; the cooperation of the bevel shear blade and the scraper surface can forcibly cut off hard particles in the medium, and the cooperation of the guide rail support and the slag discharge design can significantly improve the wear resistance, sealing tightness and operation reliability of the valve.

This invention belongs to the field of steelmaking technology and discloses a method for making steel for piston rods. The method includes: KR pretreatment to ensure the sulfur content of molten iron is ≤0.001%; ​​during the early stage of LF refining, MnN wire is fed into the steel to control the nitrogen content at 150-200 ppm, avoiding feeding MnN wire after the RH vacuum process ends; the LF process employs a low-slag smelting mode, with no slag added except for lime, and the CaO content of the refining slag is controlled at 56-64% to maintain a viscous state; during the LF process, the argon flow rate of a single bottom blow hole in the ladle is controlled at 100-300 L / min, and the Al content of the molten steel is maintained at 0.004-0.008% throughout the process; no substances are added during the RH vacuum and soft blowing processes, and the vacuum and soft blowing times are controlled at 15-25 min and 10-20 min, respectively. Based on the above steelmaking method, the proportion of large-size inclusions in the obtained piston rod can be reduced to less than 1.5%.

This invention relates to a multi-substrate painting swirl stick and its preparation method. The multi-substrate painting swirl stick includes sodium hydroxide, stearic acid, myristic acid, potassium stearate, and nano-silica. In this invention, sodium hydroxide reacts with stearic acid to form sodium stearate, and sodium hydroxide reacts with myristic acid to form sodium myristate. Sodium stearate, sodium myristate, and potassium stearate together form a composite hydrogel soap-based system. Nano-silica acts as heterogeneous nucleation sites, guiding the formation of a microcrystalline network structure during the formation of the composite hydrogel soap-based system. During application, this microcrystalline network structure can achieve controllable interlayer slippage under shear force, thereby resulting in good adhesion, good color development on smooth material surfaces, minimal flaking, uniform color application, strong hiding power, and smooth painting.

The application discloses a method for preparing formed fuel by mixing semi-dried sludge and oil-tea camellia fruit hulls, and the method comprises the following steps: (1) washing and drying the oil-tea camellia fruit hulls, then crushing and sieving the oil-tea camellia fruit hulls to obtain oil-tea camellia fruit hull powder; drying high-moisture sludge to obtain semi-dried sludge; (2) baking the oil-tea camellia fruit hull powder under a mixed atmosphere of oxygen and nitrogen to obtain baked oil-tea camellia fruit hulls, or pyrolyzing the oil-tea camellia fruit hull powder under a nitrogen atmosphere to obtain oil-tea camellia fruit hull biochar; (3) mixing and stirring the semi-dried sludge and the baked oil-tea camellia fruit hulls or the oil-tea camellia fruit hull biochar, uniformly placing water, and then preparing formed fuel. The method is simple, easy to operate and low in cost, the prepared formed fuel particles can realize rapid reduction of urban sludge and recycling of energy, and the method has the advantages of low energy consumption, high particle strength, no pollution and the like when the formed particles are prepared.