9results about How to "Sinter stable" patented technology

The utility model relates to the technical field of lithium battery positive electrode materials, and discloses a pretreatment sagger and sintering equipment. The lithium layer is arranged at the bottom of the sagger body and is suitable for preventing lithium from being absorbed by the sagger body in the sintering process; the lithium layer is composed of one of lithium carbonate, lithium hydroxide or lithium oxide and is fixed to the bottom of the sagger body. The sintering equipment comprises a sintering furnace; the saggar bearing frame is arranged in the sintering furnace and used for fixing and arranging the multiple pretreatment saggars. The gas circulation system is used for introducing inert gas or reducing gas into the furnace in the sintering process so as to prevent lithium from being oxidized. The lithium layer can reduce direct contact between the sagger body and lithium, so that corrosion and abrasion of the sagger are reduced, and the service life of the sagger is prolonged.

The application discloses a preparation method of hydrogenated aldehyde ketone resin without free formaldehyde, belongs to the technical field of aldehyde ketone resin synthesis, and aims to solve the technical problems of high free formaldehyde content, and further improved hydroxyl value stability and transparency in the hydrogenated aldehyde ketone resin in the prior art, and specifically comprises the following steps: under the protection of an inert gas atmosphere, phenylacetone, polyformaldehyde and a solvent are mixed and stirred, the reaction system is heated to 60-75 DEG C, and an inorganic alkali is added into the reaction system. The application is characterized in that the basic aldehyde ketone resin solution prepared by condensation of polyformaldehyde and phenylacetone in a water-free environment with a nickel catalyst is catalytically hydrogenated, not only the hydrogenated aldehyde ketone resin with stable hydroxyl value and extremely low colority is effectively obtained, but also the free formaldehyde content in the hydrogenated aldehyde ketone resin is effectively reduced, and the wide applicability of the hydrogenated aldehyde ketone resin in high-end coatings, adhesives and electronic materials is improved.

The invention discloses a glass sintering center positioning device which comprises a substrate layer used for placing a to-be-sintered electronic component, the substrate layer is provided with a sinking hole, and the contour shape of the sinking hole is matched with the lower half part of the to-be-sintered electronic component; the cover plate layer is mounted at the upper end of the substrate layer, an upper counter bore is formed in the cover plate layer, and the contour shape of the upper counter bore is matched with the upper half part of the electronic component to be sintered; the substrate layer is detachably connected with the cover plate layer; and the external camera recognition device is used for positioning and measuring the center position coincidence degree between the upper counter bore and the lower counter bore. The stability of the electronic component to be sintered in the sintering device and the accuracy of structural center positioning in the sintering process are optimized.

The present application relates to the technical field of metallurgy, and discloses a kind of iron ore powder sintering reaction performance evaluation method and system, to solve the problems of fragmentation, strong experimental dependence, unable to measure key parameters and poor dynamic adaptability of existing method, scheme mainly includes: obtaining the chemical composition of the iron ore powder to be evaluated, and normalizing processing;Using the Equilib module of FactSage, the results under different temperature conditions are calculated when the reaction equilibrium is obtained;Extract liquid phase production, liquid phase chemical composition and reaction enthalpy data;And using the Viscosity module of FactSage, the liquid phase viscosity under different temperature conditions is calculated;Select the liquid phase production, reaction enthalpy and liquid phase viscosity under a certain temperature as evaluation parameters, carry out vector normalization processing and set weight, use TOPSIS multi-criteria decision method, respectively calculate the relative closeness of each group of evaluation parameters;Relative closeness is used as the evaluation index of iron ore powder sintering reaction performance.The present application improves the accuracy and efficiency of sintering reaction performance evaluation.

The invention provides a method for treating desulfurized fly ash of a semi-dry sintering flue gas desulfurization process, which comprises the following steps of: uniformly premixing the desulfurized fly ash of the semi-dry sintering flue gas desulfurization process with dolomite powder, and adding the mixture into uniformly mixed ore for secondary mixing, so that the desulfurized fly ash is more uniformly mixed in the sintering process, and the desulfurized fly ash and the dolomite powder are mutually wrapped; pelletizing and mixing are uniform after sintering, meanwhile, the situation that desulfurized fly ash is pumped away in the follow-up sintering process is avoided, the amount of flux in a material layer, namely the amount of a liquid phase, cannot be reduced, and the strength of sintered ore is guaranteed. The method can consume the desulfurized fly ash of a semi-dry sintering flue gas desulfurization process, utilizes the high-calcium characteristic of the desulfurized fly ash, exerts the effect of replacing a flux of the desulfurized fly ash, reduces flux consumption, stabilizes the sintering process, can obtain qualified sinter with chemical components meeting requirements after sintering, meets the production requirements of a blast furnace, protects the environment, saves resources, and is suitable for industrial production. And the economic burden of an enterprise is reduced.

The invention provides a lithium cobalt oxide positive electrode material and a preparation method and application thereof, and the preparation method comprises the following steps: mixing a cobalt precursor and a lithium source, and carrying out primary sintering to obtain a primary sintered product; and carrying out secondary sintering on the primary sintered product to obtain the lithium cobalt oxide positive electrode material, the kiln pressure of the primary sintering is 0 Pa or below, and / or the kiln pressure of the secondary sintering is 0 Pa or below; according to the preparation method, by controlling the kiln pressure in the sintering process, sintering black spots of the lithium cobalt oxide positive electrode material are avoided, the particle morphology is improved, the growth uniformity is improved, lithium salt and CO2 in the sintering process can be removed in time, the content of residual alkali on the particle surface of the lithium cobalt oxide positive electrode material is reduced, and the cycle performance of the positive electrode material is improved.

The invention discloses a micro-environment control system and method for fused deposition modeling of a high-melting-point thermoplastic material. The high-temperature-resistant separated spray head is developed for high-melting-point thermoplastic materials, high-melting-point and high-viscosity materials, the highest heating temperature can reach 500 DEG C, the microenvironment temperature of a spray head area can be dynamically controlled according to the flow rate of thermoplastic wires, meanwhile, the heat load of mechanism movement accessories is reduced through a three-dimensional heat insulation layer, and therefore the mechanical performance is improved. And the requirements on fused deposition molding precision and performance of the thermoplastic high-melting-point PEEK can be met. And the temperature of the forming cavity is accurately controlled to be 185 + / -0.5 DEG C, and control over a wind field is increased, so that the temperature uniformity is improved, warping and deformation generated in the process that materials are converted from a semi-molten state to a solid state in the forming process are reduced, the forming precision is improved, and the printing precision and stability are ensured.

This invention proposes a spherical polylactic acid (PLA) powder with a wide sintering window, its preparation method, and its application. The preparation method includes the following steps: S1, mixing a poor solvent and PLA granules, adding the mixture to a reaction vessel, stirring, first heating, then holding at that temperature; S2, then cooling to 100-118°C, holding at that temperature for 30-60 minutes; S3, removing the product, washing and drying the product to obtain the spherical PLA powder. This invention is based on thermally induced phase separation, adding a spheroidization step to increase the crystallinity and sphericity of the PLA powder. The prepared spherical PLA powder has a particle size distribution of 10-120 μm and a bulk density of 0.3-0.45 g / cm³. 3 The powder possesses high fluidity, a wide sintering window, and excellent sintering performance, while retaining the excellent greenness and biocompatibility of polylactic acid. PLA parts formed by LPBF printing using the spherical PLA powder prepared in this invention exhibit good mechanical properties.

The invention relates to the field of diamond compact processing, in particular to a diamond compact assembly block for a coal field and a compact preparation method.The diamond compact assembly block comprises a pyrophyllite block embedded with a lining pipe, a pressure stabilizing pipe is arranged in the lining pipe in a sleeved mode, and an annular heating pipe is arranged in the pressure stabilizing pipe in a sleeved mode; 3-5 heating cavities are formed in the annular heating pipe, an isolation pipe is sleeved with each heating cavity, a metal pipe used for containing a core body is sleeved with each isolation pipe, the upper end opening and the lower end opening of the lining pipe are each sequentially provided with a heating piece, a metal piece, a pressurizing ring and a sealing ring from inside to outside, and conductive steel rings are arranged in the pressurizing rings and the sealing rings. The outer end of the conductive steel ring is provided with a conductive alloy pad; according to the invention, the ring-type structure assembly block and a new preparation technology are utilized, so that the production efficiency is improved.