The invention discloses an impurity removal cleaning method for sodium sulfide. The impurity removal cleaning method includes the operating steps that A, preliminary sedimentation is conducted, wherein a sodium sulfide solution is placed in a settling pond for 3-8 h; B, filtering is conducted, wherein a cleaning pond comprises a center pond body made of ceramic membranes and a set of first filtering pond bodies made of the ceramic membranes, the set of first filtering pond bodies are arranged on the periphery of the center pond body and share the pond wall of one side with the center pond body, the set of first filtering pond bodies and a collecting pond body are each provided with a liquid adding opening, supernate is pumped into the center pond body, and deionized water is added to the first filtering pond bodies and the collecting pond body; C, the sodium sulfide is filtered to the first filtering pond bodies through the ceramic membranes and then filtered to the collecting pond body, and a pure sodium sulfide solution is obtained. The impurity removal cleaning method for sodium sulfide is good in impurity removal effect, and the purity of the obtained sodium sulfide is high.

Impurity removal cleaning method for sodium sulfide

Integrated circuit structure and method of forming the same

High-breakdown voltage transistor with high electronic mobility

The invention discloses a granular sodium sulfide production process. The granular sodium sulfide production process comprises a raw material procedure, a calcining procedure, a hot melting procedure, a clarification mud washing procedure, a chemical impurity removing procedure, a precipitation procedure and an evaporation and concentration procedure. The granular sodium sulfide production process comprises the steps that a sodium sulfide solution obtained after evaporation and concentration is fed into a granulator and ejected through a nozzle of the granulator; granular sodium sulfide ejected from the nozzle of the granulator penetrates through a cooling device containing ether; and the granular sodium sulfide penetrating through the cooling device falls onto a moving steel belt to be subjected to cooling molding and is conveyed to a packaging position through the steel belt, and a finished product can be obtained through packaging. According to the scheme, the cooling device containing the ether is additionally arranged at the nozzle of the granulator; and after the sodium sulfide attached with the ether falls onto the moving steel belt, the ether absorbs heat transmitted from the sodium sulfide and is subjected to the gasification phenomenon, during gasification, the ether takes away a lot of heat on the sodium sulfide at the same time, thus, rapid cooling of the sodium sulfide is achieved, and the production efficiency of the sodium sulfide is effectively improved.

Granular sodium sulfide production process

The invention discloses a granulator of sodium sulfide. The granulator comprises a support and a hopper; the lower part of the hopper is provided with a material falling barrel; the material falling barrel is sleeved with a slid ring; the lower part of the material falling barrel is sleeved with a balloon; the upper end of the balloon is snapped onto the slide ring; a water tank is arranged under the material falling barrel; the bottom of the water tank is provided with a rotating disc; a group of material supports are arranged on the rotating disc; each material support comprises a supporting rod, rotating rods, belts, and supporting plates; the rotating rods are transversely and rotatingly arranged on corresponding supporting rods in two vertical lines; the rotating rods are sleeved with the belts; the supporting plates are fixedly connected with the belts; each supporting plate is provided with a groove; and the end, far from the corresponding belt, of each supporting plate is provided with a notch. The granulator is capable of solving a problem in the prior art that cooling time of sodium sulfide is too long.

Granulator of sodium sulfide

A process for producing particulate sodium sulfide, comprises selecting raw material-forging-heat melting-defecating and washing-removing impurities chemically-precipitating-evaporating and concentrating and so on Concentrated sodium sulfide is stored in a reactor or a blender, the content there of is equal to or higher than 60% Sodium sulfide is pumped, impurities are filtered by a filter, thesolution of sodium sulfide entering in a particle machine is at the temperature of 130-150degree C, the transmission pressure of 03-05Mpa After ejecting by a nozzle, the solution is cooling and molding in a steel-tape cooler Solidified particles are unloaded into a feed stock, and are hermetically packed by vacuum packing or plastic bags, then final product is obtained The process of producing particulate sodium sulfide is advanced and reasonably designed The invention provides conditions and devices of producing particles, and adopts the technology of vacuum packing, which prevents effectively deliquescence, oxidization of sodium sulfide, prolong the storage time the invention also adopts a system of automatically packing to reduce labor, improve working environment, save packing cost

Zhang Guisehng

Papers

Processing for granular sodium sulfide