53results about How to "Good chilling effect" patented technology

The invention discloses a thin-walled heat resistant steel exhaust gas manifold casting method, and belongs to the technical field of heat resistant steel exhaust gas manifold casting. The casting method comprises the following steps of core manufacturing, modeling, smelting, pouring and sand shakeout. Through the reasonable design of the amount of molten iron entering a pouring channel and the section ratio of each unit in a pouring system and strict control of the iron mold sand covering layer thickness, the mold cavity exhaust gas system and pouring temperature and the sand shankout box opening time, the thickness of the prepared exhaust gas manifold is 3.2-3.6mm, the wall is thin, the grain size level is 5.5, and the technical property reaches the required index. The prepared exhaust gas manifold has the thin wall and low weight, is stable in property, solves the problem that a common wet sand technology is difficult to form, effectively lowers the integral weight, and achieves light-weight design of an engine.

The invention discloses pre-coated sand of cold iron for a steel casting and a preparation method of the pre-coated sand. The pre-coated sand is prepared from the following raw materials: chromite sand, phenolic resin, a curing agent, a lubricant and a coupling agent. The pre-coated sand of the cold iron for the steel casting, disclosed by the invention, is used for accelerating the cooling of thecasting and has a chilling effect; the surface of the cold iron with the pre-coated sand prepared by the invention has high smooth finish and the pre-coated sand can be directly used for the cold iron; surface oxidization is not caused, the slag hole defect of the casting is avoided and dip coating of coating is reduced; the defect that water in the coating is not completely removed so that the casting has gas pores is avoided; the cold iron for the steel casting is collapsed at high temperature and is not stuck with the casting.

The invention discloses a tower-type powdered coal pressure gasification device with a chilling process. The device comprises a pressure shell, and a gasification unit and a steam / water or dust-free gas chilling unit which are hung in the pressure shell. The device is characterized in that the gasification unit is arranged below the steam / water or dust-free gas chilling unit coaxially; the gasification unit comprises a reaction chamber and four nozzles arranged near the bottom of the reaction chamber at interval; the device of the invention also comprises a cooling channel and a returning chamber which are in coaxial arrangement with the gasification unit or the steam / water or dust-free gas chilling unit, and a chilling chamber and a slag pool; the cooling channel is arranged above the steam / water or dust-free gas chilling unit; the returning chamber is arranged on the top of the cooling channel; the chilling chamber is arranged around the cooling channel; the slag pool is arranged below the gasification unit; and the pressure shell is provided with a synthesis gas outlet, a grey water exhaust port and a slag-discharging hole. By using the device of the invention, dust and slag generated by gasification can be effectively separated and processed and the problem of performing thermal compensation to the entire equipment is effectively solved.

The invention discloses a casting process method combining steel-shot chilling and vibratory pouring based on a disappearing die. The casting process method combining steel-shot chilling and vibratory pouring based on the disappearing die is characterized in that a manufactured foam model is placed into a chilling sand box, steel shots are also placed at the position of a clearance between the foam model and the chilling sand box, then the chilling sand box is placed into a sand box with a vacuum-pumping negative-pressure model, dry sand is filled between the chilling sand box and the sand box with the vacuum-pumping negative-pressure model, a plastic film is laid, a sprue cup is placed, and finally, the operation of pouring is carried out under the condition that the operations of vacuumpumping and vibrating are simultaneously carried out. According to the casting process method combining steel-shot chilling and vibratory pouring based on the disappearing die, the circular use of the steel shots and the sand is realized, the problem of lower cooling speed of a cast in the casting of the disappearing die is thoroughly solved, the problems of bulky crystal grains, uncompacted tissues and the like, which are easy to occur in the casting of a traditional disappearing die, are avoided, the toughness and the compactness of the tissues of the cast are enhanced, the use quantity of alloy elements, such as Cr, Mo and the like, is lowered, the service life of a wear-resisting cast is ensured, the batch production of a product is realized, the rejection rate is reduced, and the manpower cost is lowered.

The invention discloses a lost foam graphite chilling gravity casting process for railway cast steel wheels, which combines the lost foam casting technology and the graphite chilling process, and the prepared graphite ring is fixed in the lost foam casting sand box by bolts. Bond the formed pouring riser foam pattern with the wheel foam pattern and place it in the graphite ring, and fill the dry sand into the lost foam casting sand box. After vibration, under the set negative pressure state, use the bottom The wheels are poured out of the ladle; it solves the problem of low regeneration and recycling rate of water glass sand in the traditional railway cast steel wheel casting process, effectively reduces the consumption of quartz sand and the discharge of waste sand, which is beneficial to the control of wheel manufacturing costs and reduces the impact on the ecological environment. Impact.

A melt-slag gasifier with slag discharging device relates to a melt-slag gasifier. In the prior art, a slag-tapping port of a gasifier is easily blocked by slags and accordingly the gasifier cannot smoothly discharge slags, and there is the problem that the gasification surface cannot normally operate because of burning loss of a quenching ring at the slag-tapping port of the entrained flow gasifier and a downcomer. The interior of the melt-slag gasifier is successively divided into a combustion chamber and a quenching chamber from top to bottom; a water cooling coil is disposed in the melt-slag gasifier body, and forms a conical barrel through coiling of a water cooling pipe from top to bottom, the top end of the water cooling coil is disposed in the combustion chamber, the bottom end of the water cooling coil is disposed in the quenching chamber, the combustion chamber and the quenching chamber are communicated through the water cooling coil, the outer wall at the top end of the water cooling coil is provided with a notch, and an annular melt-slag storage groove is formed between the outer wall of the water cooling coil and the inner wall at the bottom of the combustion chamber; and the downcomer is disposed in the quenching chamber, the upper end of the downcomer is communicated with the water cooling coil, and the lower end of the downcomer is inserted into cooling water of the quenching chamber. The device is applied to the field of coal gasification.

The invention relates to a chilling block preparation process. The contact face of a chilling block is coated with acrylic acid concave-convex orange-grained paint and then is dried, so that an extremely firm protective film can be formed on the contact face after the paint is cured. The paint is extremely high in fire resistance, so that water of sand in a casting can be prevented from coming out of the paint, so as to realize strong protection and control, therefore, the service life of the chilling block is prolonged, and the quality of the casting is guaranteed.