{"id":3162,"date":"2026-08-28T00:00:35","date_gmt":"2026-08-27T16:00:35","guid":{"rendered":"https:\/\/www.hexinfiltermachine.com\/?p=3162"},"modified":"2026-08-31T18:37:06","modified_gmt":"2026-08-31T10:37:06","slug":"high-efficiency-thickener-sizing-settling-test-feed-density-and-underflow-targets","status":"publish","type":"post","link":"https:\/\/www.hexinfiltermachine.com\/ru\/high-efficiency-thickener-sizing-settling-test-feed-density-and-underflow-targets\/","title":{"rendered":"High Efficiency Thickener Sizing: Settling Test, Feed Density, and Underflow Targets"},"content":{"rendered":"<p><a style=\"text-decoration: underline;\" href=\"https:\/\/www.hexinfiltermachine.com\/ru\/product-category-2\/%d0%be%d0%b1%d0%be%d1%80%d1%83%d0%b4%d0%be%d0%b2%d0%b0%d0%bd%d0%b8%d0%b5-%d0%b4%d0%bb%d1%8f-%d1%80%d0%b0%d0%b7%d0%b4%d0%b5%d0%bb%d0%b5%d0%bd%d0%b8%d1%8f-%d1%82%d0%b2%d0%b5%d1%80%d0%b4%d0%be%d0%b9\/%d1%81%d0%b3%d1%83%d1%81%d1%82%d0%b8%d1%82%d0%b5%d0%bb%d1%8c\/\">High efficiency thickener<\/a> sizing should not start with tank diameter alone. A reliable selection requires information about slurry throughput, solids concentration, settling behavior, flocculant response, desired overflow quality, and target underflow concentration. Two plants with similar slurry flow rates may still require different thickener configurations if particle size, solids loading, or settling characteristics differ. For mining, tailings treatment, hydrometallurgy, and environmental projects, collecting representative process data before equipment selection can reduce the risk of unstable underflow, poor clarification, or overloaded rake systems.<\/p>\n<p>&nbsp;<\/p>\n<div style=\"text-align: center;\"><img decoding=\"async\" src=\"https:\/\/www.hexinfiltermachine.com\/wp-content\/uploads\/2026\/08\/High-Efficiency-Thickener-Sizing-Settling-Test-Feed-Density-and-Underflow-Targets-scaled.jpg\" alt=\"High Efficiency Thickener Sizing Settling Test, Feed Density, and Underflow Targets\" \/><\/div>\n<h2 id=\"why-should-thickener-selection-start-with-a-settling-test\"><strong>Why Should Thickener Selection Start With a Settling Test?<\/strong><\/h2>\n<p>A settling test provides practical information about how a particular slurry separates under gravity and how it responds to flocculant.<\/p>\n<p>Hexin does not publish a fixed laboratory sizing equation for the NGZ series on its product page. Therefore, actual sizing should be based on project-specific testing and engineering evaluation rather than a universal tank-size rule.<\/p>\n<h3 id=\"what-should-a-settling-test-record\"><strong>What Should a Settling Test Record?<\/strong><\/h3>\n<p>During a basic slurry test, engineers normally observe the movement of the solids-liquid interface over time.<\/p>\n<p>Useful records include:<\/p>\n<ul>\n<li>Initial solids concentration<\/li>\n<li>Settling behavior<\/li>\n<li>Clarified-liquid condition<\/li>\n<li>Floc formation<\/li>\n<li>Flocculant dosage<\/li>\n<li>Settled-bed volume<\/li>\n<li>Compression behavior<\/li>\n<\/ul>\n<p>The objective is not simply to obtain the fastest visible settling rate. The selected condition should also support stable clarification and a manageable underflow.<\/p>\n<h3 id=\"why-test-more-than-one-flocculant-condition\"><strong>Why Test More Than One Flocculant Condition?<\/strong><\/h3>\n<p>Changing the type or dosage of flocculant can influence settling and clarification.<\/p>\n<p>The NGZ High Efficiency Thickener uses a feed system designed for slurry degassing, feed-rate control, accurate flocculant dosing, and multi-point additive feeding to improve mixing between additives and slurry.<\/p>\n<p>This makes laboratory information about flocculant response particularly useful when defining the final operating strategy.<\/p>\n<h2 id=\"how-does-feed-density-affect-thickener-sizing\"><strong>How Does Feed Density Affect Thickener Sizing?<\/strong><\/h2>\n<p>Volumetric flow alone does not show how much solid material the thickener must process.<\/p>\n<h3 id=\"why-should-both-flow-and-solids-loading-be-provided\"><strong>Why Should Both Flow and Solids Loading Be Provided?<\/strong><\/h3>\n<p>A slurry with a higher solids concentration places a different load on the thickener than a dilute slurry at the same volumetric flow.<\/p>\n<p>For <a style=\"text-decoration: underline;\" href=\"https:\/\/www.hexinfiltermachine.com\/ru\/high-rate-thickener-vs-high-density-thickener-selection-guide-for-mineral-processing\/\">equipment selection<\/a>, buyers should therefore provide:<\/p>\n<ul>\n<li>Slurry flow rate<\/li>\n<li>Feed solids concentration<\/li>\n<li>Dry-solids throughput<\/li>\n<li>Solid density<\/li>\n<li>Slurry density<\/li>\n<li>Expected feed variation<\/li>\n<\/ul>\n<p>These values help the equipment supplier evaluate both hydraulic load and solids-handling demand.<\/p>\n<h3 id=\"should-maximum-feed-conditions-be-considered\"><strong>Should Maximum Feed Conditions Be Considered?<\/strong><\/h3>\n<p>Yes. Normal feed conditions are important, but plants rarely operate at exactly one density throughout the year.<\/p>\n<p>Changes in upstream grinding, ore properties, process water, or production rate can change the thickener feed. Buyers should therefore communicate both typical and expected peak conditions instead of supplying only an average value.<\/p>\n<h2 id=\"how-should-the-target-underflow-concentration-be-selected\"><strong>How Should the Target Underflow Concentration Be Selected?<\/strong><\/h2>\n<p>The correct underflow target depends heavily on what happens after thickening.<\/p>\n<p>A plant feeding a filter may have different requirements from a plant pumping thickened tailings directly to another process.<\/p>\n<h3 id=\"is-the-highest-possible-underflow-density-always-better\"><strong>Is the Highest Possible Underflow Density Always Better?<\/strong><\/h3>\n<p>Not necessarily.<\/p>\n<p>Higher solids concentration can reduce the amount of water leaving with the underflow, but excessively dense material may become more difficult to pump and move. It may also increase resistance on the rake mechanism.<\/p>\n<p>A practical target should balance:<\/p>\n<ul>\n<li>Water recovery<\/li>\n<li>Underflow pumpability<\/li>\n<li>Downstream filtration<\/li>\n<li>Rake load<\/li>\n<li>Process stability<\/li>\n<li>Required storage or discharge conditions<\/li>\n<\/ul>\n<h3 id=\"what-underflow-concentration-can-the-ngz-reach\"><strong>What Underflow Concentration Can the NGZ Reach?<\/strong><\/h3>\n<p>\u0410 <a style=\"text-decoration: underline;\" href=\"https:\/\/www.hexinfiltermachine.com\/ru\/product\/%d0%b2%d1%8b%d1%81%d0%be%d0%ba%d0%be%d1%8d%d1%84%d1%84%d0%b5%d0%ba%d1%82%d0%b8%d0%b2%d0%bd%d1%8b%d0%b9-%d1%81%d0%b3%d1%83%d1%81%d1%82%d0%b8%d1%82%d0%b5%d0%bb%d1%8c-ngz\/\">NGZ \u0412\u044b\u0441\u043e\u043a\u0430\u044f \u044d\u0444\u0444\u0435\u043a\u0442\u0438\u0432\u043d\u043e\u0441\u0442\u044c \u0437\u0430\u0433\u0443\u0441\u0442\u0438\u0442\u0435\u043b\u044f<\/a> uses a variable-slope or deep-cone bottom to promote deep compression and move concentrated material toward the center.<\/p>\n<p>Hexin states that the underflow concentration can reach <strong>60\u201370%<\/strong> under suitable operating conditions.<\/p>\n<p>This number should be treated as a stated product capability rather than a guaranteed result for every slurry. Actual performance depends on the material and operating conditions.<\/p>\n<p>&nbsp;<\/p>\n<div style=\"text-align: center;\"><img decoding=\"async\" src=\"https:\/\/www.hexinfiltermachine.com\/wp-content\/uploads\/2026\/08\/High-Efficiency-Thickener-Sizing-Settling-Test-Feed-Density-scaled.jpg\" alt=\"High Efficiency Thickener Sizing Settling Test, Feed Density\" \/><\/div>\n<h2 id=\"why-does-feed-conditioning-matter-before-settling\"><strong>Why Does Feed Conditioning Matter Before Settling?<\/strong><\/h2>\n<p>Tank area is important, but poor feed preparation can reduce the performance of a correctly selected thickener.<\/p>\n<h3 id=\"how-does-the-ngz-feed-system-support-flocculation\"><strong>How Does the NGZ Feed System Support Flocculation?<\/strong><\/h3>\n<p>According to Hexin, the NGZ charging system can perform slurry degassing, control material feed rate, dose flocculant, and introduce additives at multiple points.<\/p>\n<p>These functions are intended to create better contact between the slurry and additives before solids enter the main settling zone.<\/p>\n<p>For project selection, buyers should therefore provide information not only about slurry quantity but also about whether the feed contains air, fine particles, or other characteristics that may affect floc formation.<\/p>\n<h2 id=\"why-are-rake-load-and-bed-conditions-important\"><strong>Why Are Rake Load and Bed Conditions Important?<\/strong><\/h2>\n<p>Settled solids must eventually move toward the underflow outlet. As the bed becomes denser, the resistance acting on the rake can increase.<\/p>\n<h3 id=\"how-does-the-ngz-protect-the-rake-system\"><strong>How Does the NGZ Protect the Rake System?<\/strong><\/h3>\n<p>The NGZ uses a multi-hydraulic-motor drive system. When scraper resistance increases, hydraulic pressure also rises. If the pressure reaches a preset level, the control system can lift the rake automatically. Continued excessive pressure can trigger a stop and alarm to protect the drive system.<\/p>\n<p>Hexin also states that the maximum rake lifting height is <strong>600 mm<\/strong>.<\/p>\n<p>These functions are relevant when processing feeds whose solids loading may vary during operation.<\/p>\n<h2 id=\"what-information-should-buyers-send-before-requesting-a-thickener-quote\"><strong>What Information Should Buyers Send Before Requesting a Thickener Quote?<\/strong><\/h2>\n<p>A detailed process data sheet is more useful than simply asking for a thickener of a certain diameter.<\/p>\n<h3 id=\"recommended-project-data\"><strong>Recommended Project Data<\/strong><\/h3>\n<p>Buyers should prepare:<\/p>\n<ul>\n<li>Required throughput<\/li>\n<li>Feed solids concentration<\/li>\n<li>Particle-size information<\/li>\n<li>Slurry and solids density<\/li>\n<li>Settling-test results<\/li>\n<li>Flocculant test information<\/li>\n<li>Desired overflow quality<\/li>\n<li>Target underflow concentration<\/li>\n<li>Maximum feed variation<\/li>\n<li>Downstream equipment<\/li>\n<li>Available installation space<\/li>\n<li>Control requirements<\/li>\n<\/ul>\n<p>If reliable test data are unavailable, representative slurry samples or further technical discussion may be needed before final sizing.<\/p>\n<h2 id=\"why-choose-yantai-hexin-for-high-efficiency-thickener-projects\"><strong>Why Choose Yantai Hexin for High Efficiency Thickener Projects?<\/strong><\/h2>\n<p><a style=\"text-decoration: underline;\" href=\"https:\/\/www.hexinfiltermachine.com\/ru\/about-us\/\">\u042f\u043d\u0442\u0430\u0439 \u0413\u0435\u043a\u0441\u0438\u043d \u042d\u043a\u043e\u043b\u043e\u0433\u0438\u0447\u0435\u0441\u043a\u0430\u044f \u0437\u0430\u0449\u0438\u0442\u0430 \u043e\u0431\u043e\u0440\u0443\u0434\u043e\u0432\u0430\u043d\u0438\u044f Co., Ltd<\/a> has more than 20 years of filtration-industry experience and manufactures filtration and solid-liquid separation equipment for mining, metallurgy, chemical processing, sewage treatment, and tailings treatment.<\/p>\n<p>Its NGZ High Efficiency Thickener combines a central drive system, automatic rake mechanism, PLC control, feed conditioning, flocculant dosing, and hydraulic rake protection. The product is suitable for applications including tailings treatment, hydrometallurgy, environmental engineering, and mining.<\/p>\n<p>For B2B buyers, providing representative process data allows the supplier to evaluate the application more accurately than selecting equipment from flow rate alone.<\/p>\n<h2 id=\"conclusion\"><strong>\u0412\u044b\u0432\u043e\u0434<\/strong><\/h2>\n<p>High efficiency thickener sizing starts with the slurry, not the tank diameter. Settling behavior, feed density, dry-solids throughput, flocculant response, desired overflow quality, and underflow target should be considered together.<\/p>\n<p>The NGZ High Efficiency Thickener provides feed conditioning, PLC control, automatic rake adjustment, overload protection, and deep-compression design features. However, final equipment selection should still be based on the customer&#8217;s actual material and operating requirements.<\/p>\n<h2 id=\"faqs\"><strong>\u0412\u043e\u043f\u0440\u043e\u0441\u044b \u0438 \u043e\u0442\u0432\u0435\u0442\u044b<\/strong><\/h2>\n<h3 id=\"can-a-thickener-be-selected-using-only-slurry-flow-rate\"><strong>1. Can a thickener be selected using only slurry flow rate?<\/strong><\/h3>\n<p>No. Feed solids concentration, solids throughput, settling behavior, underflow target, and other process conditions should also be evaluated.<\/p>\n<h3 id=\"what-data-are-most-useful-for-a-thickener-settling-test\"><strong>2. What data are most useful for a thickener settling test?<\/strong><\/h3>\n<p>Useful information includes feed concentration, settling behavior over time, flocculant conditions, clarified-liquid quality, and the final settled-bed condition.<\/p>\n<h3 id=\"can-every-slurry-reach-6070-underflow-concentration-with-the-ngz\"><strong>3. Can every slurry reach 60\u201370% underflow concentration with the NGZ?<\/strong><\/h3>\n<p>No. Hexin states that the NGZ can reach a 60\u201370% underflow concentration under suitable conditions, but actual performance depends on the slurry characteristics and process conditions.<\/p>","protected":false},"excerpt":{"rendered":"<p>High efficiency thickener sizing should not start with tank diameter alone. A reliable selection requires information about slurry throughput, solids concentration, settling behavior, flocculant response, desired overflow quality, and target underflow concentration. Two plants with similar slurry flow rates may still require different thickener configurations if particle size, solids loading, or settling characteristics differ. For [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":3158,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-3162","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.hexinfiltermachine.com\/ru\/wp-json\/wp\/v2\/posts\/3162","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.hexinfiltermachine.com\/ru\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.hexinfiltermachine.com\/ru\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.hexinfiltermachine.com\/ru\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.hexinfiltermachine.com\/ru\/wp-json\/wp\/v2\/comments?post=3162"}],"version-history":[{"count":1,"href":"https:\/\/www.hexinfiltermachine.com\/ru\/wp-json\/wp\/v2\/posts\/3162\/revisions"}],"predecessor-version":[{"id":3163,"href":"https:\/\/www.hexinfiltermachine.com\/ru\/wp-json\/wp\/v2\/posts\/3162\/revisions\/3163"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.hexinfiltermachine.com\/ru\/wp-json\/wp\/v2\/media\/3158"}],"wp:attachment":[{"href":"https:\/\/www.hexinfiltermachine.com\/ru\/wp-json\/wp\/v2\/media?parent=3162"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.hexinfiltermachine.com\/ru\/wp-json\/wp\/v2\/categories?post=3162"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.hexinfiltermachine.com\/ru\/wp-json\/wp\/v2\/tags?post=3162"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}