63results about How to "Reduce entrainment loss" patented technology

The invention discloses a longitudinal-axial-flow combine harvester and belongs to the technical field of agricultural machines. The longitudinal-axial-flow combine harvester comprises a harvesting table, a gap bridge device, a threshing separating device, a cleaning device, a grain collecting device and a barn. The threshing separating device comprises a threshing machine body and a longitudinal-axial-flow roller driven by a power device. The longitudinal-axial-flow roller comprises a feeding-in part and a roller body part, and the roller body part sequentially comprises a threshing section, a separating section and a weed-discharging section. A feeding-in shell is arranged on the portion, corresponding to the feeding-in part, of the threshing machine body, a threshing section roller cover is arranged on the upper portion, corresponding to the threshing section, of the threshing machine body, and a threshing section concave plate is arranged on the lower portion, corresponding to the threshing section, of the threshing section roller cover. A separating section roller cover is arranged on the upper portion, corresponding to the separating section, of the threshing machine body, and a separating section concave plate is arranged on the lower portion, corresponding to the separating section, of the threshing machine body. The diameter of the separating section roller cover is larger than that of the threshing section roller cover. The feed quantity is large in harvesting, the function of returning stalks to the field is achieved, working efficiency is improved, kinds of crops are harvested, and the requirements for earnings of a user are met.

The invention discloses a method and a system for recovering lithium and cobalt from waste lithium cobalt oxide batteries. The method comprises the following steps of: disassembling a positive electrode sheet from a waste lithium cobalt oxide battery; Removing the binder in the positive electrode sheet, and then acid leaching the valuable metal elements in the positive electrode sheet to obtain anacidizing leaching solution; The acidified leachate was treated by ultrafiltration membrane. Separating lithium ions in acidified leaching solution from other cations different from lithium ions by using nanofiltration membrane technology to obtain lithium-containing solution and solution containing other cations, and concentrating and enriching the lithium-containing solution and the solution containing other cations respectively by reverse osmosis technology, wherein the other cations include cobalt ions; And a lithium precipitant is used to precipitate lithium ions from a lithium-containing solution, and an alkaline substance is used to precipitate cobalt ions from a solution containing other cations, thereby realizing the recovery of lithium and cobalt. The adoption of ultrafiltration-Nanofiltration-Reverse osmosis combined technology has the characteristics of simple process, less acid and alkali consumption, good and stable membrane separation effect and so on.

The invention discloses a method and a system for recovering lithium and manganese from waste lithium manganate batteries. The method includes: dismantling the positive electrode sheet from the waste lithium manganese oxide battery; removing the binder in the positive electrode sheet, and then leaching the valuable metal elements in the positive electrode sheet through acid solution to obtain an acidified leachate; using an ultrafiltration membrane to The acidified leachate is subjected to ultrafiltration treatment; the lithium ions in the acidified leachate are separated from other cations different from lithium ions by using nanofiltration membrane technology to obtain a lithium-containing solution and a solution containing other cations, which are then concentrated and enriched by reverse osmosis technology. set, the other cations include manganese ions; and, the lithium ions in the lithium-containing solution are precipitated by using a lithium precipitant, and the manganese ions in the solution containing other cations are precipitated by using an alkaline substance, so as to realize the separation of lithium and manganese Recycle. The invention adopts ultrafiltration-nanofiltration-reverse osmosis combined technology, and has the characteristics of simple and environmentally friendly process, less acid and alkali consumption, good and stable membrane separation effect, and the like.

A method for separating associated fluorite-rich and low-grade cassiterite from tungsten tailings. The tungsten tailings containing fluorite CaF216-25% and tin-SnO20.1-0.3% are directly put into the flotation column for roughing Fluorspar: Separating fluorspar from calcite and iron-containing pyroxene to obtain fluorspar rough concentrate and anti-enrichment tin-containing tailings; the fluorite coarse concentrate is separated by flotation machine for five times to obtain fluorspar Concentrate products and flotation fluorite tailings; the anti-enrichment tin-containing tailings are separated by two-stage separation, and the sub-concentrate is concentrated and rewashed by shaking table re-election technology to obtain tin rough concentrate products and tin tailings. The invention has simple technological process, can reduce the loss of fluorite and cassiterite in the overflow water at the same time, and is beneficial to the improvement of the comprehensive recycling rate of the fluorite and cassiterite.

The invention discloses a method for preparing high-purity graphite in high-temperature vacuum, which belongs to the technical field of ultra-pure graphite preparation and solves the problems of high energy consumption, high pollution process, low production capacity and high production cost in the purification process of graphite powder in the prior art. The method of the invention comprises the following steps: S1. forming raw graphite powder into balls or blocks; S2. drying the formed graphite; S3. purifying graphite in a high-temperature vacuum furnace; S4. discharging. This method is suitable for the preparation of high-purity graphite.